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  • Log interpretation
    #REDIRECT [[Log interpretation: initial quick scan]]
    52 bytes (6 words) - 13:43, 12 August 2014
  • Density log
    236 bytes (31 words) - 19:53, 18 November 2014
  • Compensated neutron log
    306 bytes (36 words) - 19:50, 18 November 2014
  • Log analysis: lithology
    ...ome commonly encountered lithologies and their characteristics relative to log responses. * Analysis of log responses
    25 KB (3,189 words) - 17:24, 18 January 2022
  • Log analysis applications
    | chapter = Log analysis applications ...wers to geological questions. This article briefly summarizes computerized log analysis packages (LAPs) by reviewing basic features and emphasizing the fu
    21 KB (3,142 words) - 16:20, 20 January 2022
  • Well log sequence analysis
    ...es in Geology No. 27], p. 2.</ref> outlines a suggested procedure for well log sequence analysis. ...depositional lithofacies on logs using cores and cuttings to calibrate the log.
    6 KB (845 words) - 16:53, 4 February 2022
  • Density-neutron log porosity
    ==Density log== The [[Basic open hole tools#Density|density log]] measures the electron density of a formation. The logging device is a con
    12 KB (1,763 words) - 16:18, 5 April 2022
  • Log interpretation: initial quick scan
    | title = Basic Well Log Analysis, 2nd Edition | chapter = Log Interpretation
    4 KB (543 words) - 14:11, 21 August 2014
  • Well log analysis for reservoir characterization
    ...thers. Some approaches are needed to characterize reservoir, by using well log data, the user may be able to calculate: ...ror. Figure 1 shows the steps for reservoir characterization by using well log data. Basically, there are two types of properties that will be used in res
    25 KB (3,679 words) - 21:17, 13 March 2019
  • Combining well log with seismic sequence analysis
    ...scontinuities are identified as objectively as possible on the seismic and log sections before they are tied together using the [[synthetic seismogram]].< ...ation]]s should be tied together by generating a synthetic seismogram from log information. There are two primary objectives to this step:<ref name=ch21r4
    5 KB (746 words) - 16:54, 4 February 2022
  • Analysis of well-log and seismic data
    #REDIRECT [[Pressure prediction: analysis of well-log and seismic data]]
    72 bytes (9 words) - 14:53, 10 May 2014
  • Core-log transformations and porosity-permeability relationships
    #REDIRECT [[Core-to-log transformations and porosity-permeability relationships]]
    81 bytes (6 words) - 15:37, 19 December 2014
  • Core-to-log transformations and porosity-permeability relationships
    | chapter = Core-log transformations and porosity-permeability relationships ==Core-log transformations==
    14 KB (1,893 words) - 20:15, 2 February 2016
  • Pressure prediction: analysis of well-log and seismic data
    ==Log of drilling rate== ...es vs. depth. These define a normal shale trend (NST) line for each of the log curves to be used.<br>
    5 KB (733 words) - 17:57, 17 February 2022
  • Conversion of well log data to subsurface stratigraphic and structural information
    44 bytes (5 words) - 15:31, 19 December 2014

Page text matches

  • Difficult lithologies
    #REDIRECT [[Log analysis: lithology]]
    37 bytes (4 words) - 17:02, 19 December 2014
  • Determining porosity from density-neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 16:56, 19 December 2014
  • Determining porosity from density–neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 19:46, 14 January 2015
  • Log interpretation
    #REDIRECT [[Log interpretation: initial quick scan]]
    52 bytes (6 words) - 13:43, 12 August 2014
  • Core-log transformations and porosity-permeability relationships
    #REDIRECT [[Core-to-log transformations and porosity-permeability relationships]]
    81 bytes (6 words) - 15:37, 19 December 2014
  • Analysis of well-log and seismic data
    #REDIRECT [[Pressure prediction: analysis of well-log and seismic data]]
    72 bytes (9 words) - 14:53, 10 May 2014
  • Seismic data: identifying reflectors
    ...her using[[vertical seismic profile| VSP]], [[synthetic seismogram]], or [[log overlay]], the final step is to compare the object to [[seismic trace]]s in ...interpreting-seismic-data_fig12-8.png|300px|thumb|{{figure number|1}}Sonic log converted to time and velocity. From Liner;<ref name=Liner1999>Liner, C., 1
    2 KB (348 words) - 19:10, 27 January 2022
  • Interval transit time
    This is the inverse of velocity and is what is displayed on a sonic log, usually in units of μs/ft or μs/m. It is also seen as ''delta t'' or ''
    205 bytes (40 words) - 20:03, 14 April 2014
  • Log interpretation: initial quick scan
    | title = Basic Well Log Analysis, 2nd Edition | chapter = Log Interpretation
    4 KB (543 words) - 14:11, 21 August 2014
  • Magnetotellurics
    ...is measured in a borehole [[Basic_open_hole_tools#Resistivity|resistivity log]]. ...re number|1}}Simplified relationship between a lithologic log, an electric log, an MT sounding, and an inversion run using the MT sounding data.]]
    3 KB (486 words) - 17:53, 25 January 2022
  • Combining well log with seismic sequence analysis
    ...scontinuities are identified as objectively as possible on the seismic and log sections before they are tied together using the [[synthetic seismogram]].< ...ation]]s should be tied together by generating a synthetic seismogram from log information. There are two primary objectives to this step:<ref name=ch21r4
    5 KB (746 words) - 16:54, 4 February 2022
  • Lithofacies analysis
    ...ibrated well logs into well log [[cross section]]s constructed during well log [[Sequence stratigraphy|sequence analysis]]. ...acies of [[Depositional sequence definition|depositional sequences]] using log cross sections and seismic sections with seismic facies analyses.
    2 KB (317 words) - 18:52, 4 February 2022
  • Spontaneous potential logs in water resistivity calculation
    ...or a nearby well, or it can be calculated using spontaneous potential (SP) log data. ...of the mud filtrate (R<sub>mf</sub>) at measured temperature, found on the log header. If only mud resistivity (R<sub>m</sub>) is given, convert it to R<s
    6 KB (1,027 words) - 16:40, 5 April 2022
  • Geometrical analysis
    * [[Well log sequence analysis]] * [[Combining well log with seismic sequence analysis]]
    2 KB (239 words) - 14:58, 4 February 2022
  • Mudlogging: the mudlog
    ...to well and to prevent confusion or misunderstanding over the meaning of a log trace or annotation. ...2]] is an example of the layout and information content of a standard mud log. The general usage of the tracks (columns) on a mudlog are outlined here.
    5 KB (752 words) - 15:39, 24 January 2022
  • Using conventional well logs to estimate richness
    ...gs to predict organic richness of a unit of rock requires calibrating well log intervals to samples measured for [[Total organic carbon (TOC)|total organi ...istivity|resistivity logs]]. The table below<ref name=ch06r7 /> summarizes log responses to organic matter.
    5 KB (768 words) - 15:48, 9 February 2022
  • Seismic data: building a stratigraphic model
    * [[Basic_open_hole_tools#Sonic|Sonic log]] with [[Checkshots_and_vertical_seismic_profiles#Checkshot_surveys|checksh * Sonic log without checkshots
    5 KB (805 words) - 19:06, 27 January 2022
  • Pressure prediction: analysis of well-log and seismic data
    ==Log of drilling rate== ...es vs. depth. These define a normal shale trend (NST) line for each of the log curves to be used.<br>
    5 KB (733 words) - 17:57, 17 February 2022
  • Pickett plot construction
    ...ies and corresponding resistivities taken from well logs and 2×4 cycle log-log paper. The procedure for making a Pickett plot consists of five steps, deta ...ints of matching [[porosity]] and true resistivity (R<sub>t</sub> ) on log-log paper.
    6 KB (878 words) - 16:16, 5 April 2022
  • True resistivity determination
    ...tivity|resistivity]] of the log with deepest investigation (deep induction log [ILD], deep laterolog [LLD], etc.). | Bed is < 20 ft thick for an [[Basic open hole tools#Induction|induction log]] or < 4 ft thick for a [[Basic open hole tools#Laterologs|laterolog]] || C
    3 KB (427 words) - 16:16, 5 April 2022
  • Well log sequence analysis
    ...es in Geology No. 27], p. 2.</ref> outlines a suggested procedure for well log sequence analysis. ...depositional lithofacies on logs using cores and cuttings to calibrate the log.
    6 KB (845 words) - 16:53, 4 February 2022
  • Determining water saturation
    ..., G. R., 1973, Pattern recognition as a means of formation evaluation: The Log Analyst, vol. 14, no. 4, p. 3–11.</ref>
    2 KB (244 words) - 13:38, 5 April 2022
  • Density-neutron log porosity
    ==Density log== The [[Basic open hole tools#Density|density log]] measures the electron density of a formation. The logging device is a con
    12 KB (1,763 words) - 16:18, 5 April 2022
  • Introduction to geological methods
    * [[Conversion of well log data to subsurface stratigraphic and structural information]]
    867 bytes (82 words) - 20:42, 16 July 2014
  • Formation evaluation of naturally fractured reservoirs
    ===Sonic amplitude log=== ...s case, the fracture is present but is not detected by the sonic amplitude log.
    9 KB (1,380 words) - 17:25, 18 January 2022
  • Synthetic seismogram
    ...red. The synthetic then correlates with both the seismic data and the well log from which it was generated. ...ng|400px|thumb|{{figure number|1}}Synthetic seismogram and associated well log data.]]
    8 KB (1,199 words) - 13:57, 24 January 2022
  • Midale water saturation and pore geometry
    ==Log response and S<sub>w</sub>== Variations in pore geometry have the expected effect on log responses and [[water saturation]]s (S<sub>w</sub>). The Midale vuggy beds
    4 KB (588 words) - 17:01, 12 April 2022
  • Core-to-log transformations and porosity-permeability relationships
    | chapter = Core-log transformations and porosity-permeability relationships ==Core-log transformations==
    14 KB (1,893 words) - 20:15, 2 February 2016
  • Archie equation
    ...re its time.''</ref> developed his famous equation to calculate, from well log parameters, the [[water saturation]] (S<sub>w</sub>) of the uninvaded zone ...general terms; suggested methods are most useful when dealing with modern log suites of good quality.
    5 KB (703 words) - 13:52, 5 April 2022
  • Midale lithofacies and distribution
    ==Weyburn well log== ...-system-quality-and-performance_fig9-101.png|{{figure number|3}}example of log characteristics of Midale beds in a Weyburn field well.<ref name=ch09r11>Co
    6 KB (842 words) - 18:50, 4 December 2023
  • Formation water density
    ...ight: Gearhart-Owens.<ref name=G-O1972>Gearhart-Owens Industries, 1972, GO Log Interpretation Reference Data Handbook: Fort Worth, Gearhart-Owens Industri #*::: BHT = bottom-hole temperature (found on log header) (°F)
    5 KB (714 words) - 15:19, 13 September 2022
  • Depositional sequence identification
    ...|wireline logs]], integrate the biostratigraphic data with correlated well log and [[seismic data]], and select candidate depositional sequences. ...smic profile interpretations, biostratigraphic analyses, and regional well log [[cross section]]s.
    3 KB (409 words) - 21:47, 22 February 2022
  • Preprocessing of logging data
    ...zed, all digital log data should be plotted and compared with the original log hard copies. ...><ref name=pt04r7>Neinast, G. S., Knox, C. C., 1973, Normalization of well log data: SPWLA 14th Annual Logging Symposium Transactions Paper I.</ref><ref n
    13 KB (2,094 words) - 17:42, 18 January 2022
  • Borehole gravity applications: examples
    ...Michigan: The Log Analyst, September-October, p. 1-10</ref> courtesy ''The Log Analyst''.]] ...a remote higher [[porosity]] zone not detected by the gamma-gamma density log. The broader difference anomaly observed over the length of the interval is
    11 KB (1,596 words) - 18:08, 24 January 2022
  • Procedure for geometrical analysis
    ...p://www.merriam-webster.com/dictionary/outcrop outcrop] sections, and well log sections. ...uence boundaries) in seismic sections, outcrop sections, and regional well log sections.
    6 KB (862 words) - 15:20, 4 February 2022
  • Borehole gravity tool
    | Gamma-gamma log || 8 || 20 || 17 || 0.5 | Neutron log || 14 || 36 || 40 || 1.1
    5 KB (720 words) - 18:07, 24 January 2022
  • Other correlation features
    ...ta taken on a 30-ft (9.1-m) interval show abundance peaks crossing a sharp log break from a thin carbonate to marine shale.]] ...e a common feature of the maximum flooding surface (MFS). Seismic and well log correlations confirm that this break is an MFS overlain by a prograding cla
    6 KB (872 words) - 15:20, 4 February 2022
  • Synthetic seismograms: correlation to other data
    ...traveltime]], which is calculated from [[Basic_open_hole_tools#Sonic|sonic log]] measurements. ...typically 10–90 Hz (low frequency, long wavelength). This means the sonic log is influenced by a tiny volume of rock compared to a seismic wave passing t
    3 KB (486 words) - 19:10, 27 January 2022
  • Depth and thickness conversion
    | chapter = Conversion of well log data to subsurface stratigraphic and structural information Conversion of log depths to positions with respect to the surface location of a well is the f
    17 KB (2,363 words) - 16:49, 20 January 2022
  • Water resistivity determination
    ...ection.<ref name=pt04r3>Dewan, J. T., 1983, Essentials of modern open-hole log interpretation: Tulsa, OK, Penn Well Books.</ref> ...the interpretation of the [[Basic open hole tools#Spontaneous potential|SP log]] is the establishment of “sand” and “shale” lines, as shown in [[:
    13 KB (2,077 words) - 17:26, 18 January 2022
  • Seismic inversion
    ...nd-limited inversion of several traces around a reef. The integrated sonic log from the reef well is shown as the dark trace in the central part of the fi ...based inversion of several traces from around a reef. The integrated sonic log from the reef well is shown as the dark trace in the central part of the fi
    8 KB (1,196 words) - 18:48, 21 January 2022
  • Stratigraphic trap
    ...[[Seismic interpretation|seismic]], [[Quick-look lithology from logs|well log]], [[Petroleum reservoir fluid properties|fluid character]], [[Formation fl
    1 KB (176 words) - 12:51, 3 July 2014
  • East Breaks seal rock
    file:sedimentary-basin-analysis_fig4-48.png|{{figure number|1}}Well log cross-section of the ''Glob alt'' reservoir interval. After Armentrout et a ...ation of the ''Glob alt'' sandstones. The top seal, which occurs above the log cross section, is a major mudstone condensed interval coincident with the '
    5 KB (662 words) - 14:48, 19 December 2023
  • Tight gas reservoirs: evaluation
    ...cored sequence of tight gas reservoir facies and correlations to electric log responses of the Frontier Formation, Green River basin, Wyoming. Lithologie ===Core to log correlations===
    11 KB (1,444 words) - 21:26, 4 January 2024
  • Flow units and containers
    ...s of similar pore type. Petrophysical characteristics, such as distinctive log character and/or porosity-[[permeability]] relationships, define individual * Well log curve character
    9 KB (1,231 words) - 18:42, 1 April 2022
  • Interpreting hydrocarbon shows
    ! Show type || Core or cuttings || Mud log || Sw% || Log analysis || Dst || [[Wireline formation testers|Repeat formation tester (RF ! Show type || Core or cuttings || Mud log || Sw% || Log analysis || Dst || Rft
    8 KB (1,130 words) - 17:09, 5 April 2022
  • Seismic sequence analysis
    * [[Well log sequence analysis]] * [[Combining well log with seismic sequence analysis]]
    5 KB (647 words) - 15:49, 4 February 2022
  • Fracture analysis
    ===Log analysis===
    5 KB (644 words) - 15:30, 3 February 2022
  • Well log analysis for reservoir characterization
    ...thers. Some approaches are needed to characterize reservoir, by using well log data, the user may be able to calculate: ...ror. Figure 1 shows the steps for reservoir characterization by using well log data. Basically, there are two types of properties that will be used in res
    25 KB (3,679 words) - 21:17, 13 March 2019
  • Recognizing stacked depositional sequences from well data
    * variations in well log response ==Building regional log cross sections==
    14 KB (1,901 words) - 15:16, 9 January 2024
  • Petrophysical analysis of lithofacies
    #* Had mud log shows ...tions into intervals of similar petrophysical character (flow units) using log data and, if available, porosity-[[permeability]] data. Categorize each flo
    6 KB (763 words) - 18:53, 4 February 2022
  • Production histories
    [[file:production-histories_fig1.png|300px|thumb|{{figure number|1}}Semi-log decline history.]] ...ercent decline can be used effectively to forecast future performance. The log of flow rate is plotted versus time. In [[:file:production-histories_fig1.p
    11 KB (1,656 words) - 18:41, 20 January 2022
  • Seismic data preparation for mapping
    ...pute a synthetic seismogram for each online well with a sonic or [[density log]]. * Sonic log
    7 KB (1,064 words) - 19:11, 27 January 2022
  • Borehole gravity
    ...nd 6370 ft is caused by porosity not detected by the gamma-gamma [[density log]]. The broader difference anomaly observed over the length of the logged in ...y level, and a 5- to 10-min reading is taken. The blocky appearance of the log reflects the station interval ([[:file:borehole-gravity_fig1.png|Figure 1]]
    10 KB (1,517 words) - 15:54, 20 January 2022
  • Core description
    ...for stratigraphic correlation, environmental interpretation, and wireline log calibration. Core plugs provide samples for analysis of [[porosity]], [[per ...arison of lithologic properties with petrophysical properties and wireline log responses.
    13 KB (1,786 words) - 20:50, 19 January 2022
  • Suggested pages
    * LOG ANALYSIS
    2 KB (215 words) - 20:43, 10 August 2015
  • Pay determination
    | 1. Geologically characterize reservoir || [[Core description]], wireline log calibration, [[lithofacies]] determination, depositional environment analys ...|| Core analysis (porosity, [[permeability]], fluid saturation), wireline log analysis (porosity, fluid saturation)
    13 KB (1,799 words) - 19:01, 20 January 2022
  • Production logging
    ...required to be effective.<ref name=pt09r22>Schlumberger, 1989, Cased hole log interpretation principles/applications: Houston, TX, Schlumberger Education production-logging_fig2.png|{{figure number|2}}Noise log responses to fluid movement downhole.
    12 KB (1,726 words) - 16:48, 20 January 2022
  • Fault plane profile
    * H<sub>w</sub>—apparent thickness measured in a well log ===Well-log thickness===
    9 KB (1,461 words) - 21:57, 28 March 2022
  • Wireline formation testers
    ...ecord of a single pretest formation tester showing both analog and digital log presentations. Copyright: Western Atlas International, 1987; courtesy of At ...uge within the tool sampling system. Time is increasing downward along the log. The hydrostatic mud column, drawdown, and formation pressures are clearly
    10 KB (1,446 words) - 17:42, 18 January 2022
  • Measurement while drilling
    measurement-while-drilling_fig3.png|{{figure number|3}}Composite lithological log from MWD data.<ref name=pt03r42>Schlumberger, 1989, Prospector logging whil ...ion using MWD technology has several advantages over conventional wireline log methods:
    8 KB (1,083 words) - 21:18, 19 January 2022
  • Displacement pressure estimation
    | Log analysis || [[Basic open hole tools#Resistivity|Logs]] and database of labo
    2 KB (258 words) - 18:41, 31 March 2022
  • Rock quality
    :<math>\log \mbox{r}_{35} = 0.732 + 0.588 \log \mbox{K}_{\rm a} - 0.864 \log \Phi</math> :<math>\mbox{r}_{35} = 10^{0.732 + 0.588\log {\rm K}_{\rm a} - 0.864 \log \Phi}</math>
    10 KB (1,534 words) - 16:53, 4 April 2022
  • Predicting carbonate reservoir location and quality
    ...hy]] and facies tracts through time using systems tract maps; use core and log data to infer shorelines and platform edge locations. ...humb|{{figure number|1}}Large-scale carbonate platform stratal patterns in log cross sections or seismic sections. From Handford and Loucks.<ref name=Hand
    7 KB (894 words) - 14:15, 11 April 2022
  • Quantitative fault seal analysis
    ...is and most log analysis software.<ref name=ch10r18>Doveton, J., H., 1986, Log analysis of subsurface geology: New York, John Wiley & Sons, 273 p.</ref> ...nd 200 ft. Sands are patterned; shales are black. The black trace is an SP log.
    9 KB (1,327 words) - 16:32, 29 March 2022
  • AAPG Wiki:Privacy policy
    ...still be able to read content on these pages, but you will not be able to log in or edit or create articles.
    2 KB (333 words) - 15:37, 9 October 2013
  • 2014 wiki write off
    ...Mada for winning the Inaugural Wiki Write Off with their article on [[Well log analysis for reservoir characterization]]!
    2 KB (257 words) - 19:24, 27 July 2015
  • East Breaks reservoir rock
    ...nd [[:file:sedimentary-basin-analysis_fig4-44.png|2]]). The 160-1 electric log pattern is spontaneous potential. ==Well-log cross section==
    13 KB (1,771 words) - 17:24, 5 December 2023
  • Cased hole tools
    ...ng|300px|thumb|{{figure number|1}}Typical presentation of a pulsed neutron log. &copy; Schlumberger.<ref name=Schlumberger1986>Schlumberger Well Services, ...porosity and formation water salinity are known. A typical pulsed neutron log is shown in [[:file:basic-cased-hole-tools_fig1.png|Figure 1]].
    10 KB (1,427 words) - 16:26, 18 January 2022
  • Petrophysical analysis of Sorrento field wells
    ...interpreted as encountering transition zones, based on porosity types and log-calculated saturations. Well 8 encountered the Morrow just above the water ...water saturation (S<sub>wi</sub> = 40%). The discrepancy suggests that the log resistivity was too low due to bed resolution problems. If true resistivity
    7 KB (956 words) - 17:24, 11 April 2022
  • AAPG Wiki:Users
    | '''Root''' || 3 || Login || No || All || The person or people who can log into the server and edit LocalSettings.php
    2 KB (294 words) - 16:01, 6 August 2013
  • Diagenetic impact on traps
    ...es]], [[Mudlogging: drill cuttings analysis|samples]], and modern wireline log suites greatly facilitates subsurface interpretation. In [[:file:exploring-
    2 KB (297 words) - 21:06, 3 February 2022
  • Log analysis applications
    | chapter = Log analysis applications ...wers to geological questions. This article briefly summarizes computerized log analysis packages (LAPs) by reviewing basic features and emphasizing the fu
    21 KB (3,142 words) - 16:20, 20 January 2022
  • Displacement pressure estimation from sedimentary facies and well logs
    ...r68>Shea, W. T., J. R. Schwalbach, and D. M. Allard, 1993, Integrated rock-log evaluation of fluvio-lacustrine seals, in J. Ebanks, J. Kaldi, and C. Vavra An encouraging development is the attempt to establish a relationship between log response and displacement pressure.<ref name=ch10r1>Alger, R. P., D. L. Luf
    5 KB (764 words) - 19:46, 31 March 2022
  • Quick-look lithology from logs
    ===Log shapes=== ...the shale is least compacted. (b) Cylinder shape, blocky. Note that the SP log is featureless because the borehole salinity is the same as formation salin
    25 KB (3,637 words) - 19:39, 18 January 2022
  • Cross section
    ...s irregular to make the cross section more compact. The left track of each log is an [[Basic open hole tools#Spontaneous potential|SP]] or [[Basic open ho ...hich horizontal scale is entirely schematic because stratigraphic and well log variations across a number of fault blocks are the main features of interes
    20 KB (3,029 words) - 16:09, 24 January 2022
  • Arecuna field
    Methods14ch08f02.jpg|{{figure number|2}}Reference log of the main producing interval at Arecuna field. Depth is in feet. ...tematic vertical changes in bedding architecture (readily apparent on well-log traces) occurring above successive, laterally persistent high gamma-ray (or
    16 KB (2,381 words) - 19:03, 11 March 2019
  • Morrow lithofacies and pore types: Sorrento field
    By studying [[Core description|core]] and [[Basic open hole tools|log]] data from one well (well 11; see [[:file:predicting-reservoir-system-qual ...n Figure 9-86. Minimum water saturations (“immobile” water) estimated from log calculations let us extrapolate the P<sub>c</sub> curves into low S<sub>w</
    6 KB (769 words) - 17:23, 11 April 2022
  • Pressure transient testing
    ...s dominate early test data. The end of wellbore effects is found using log-log plots of test data, which are compared to preplotted type curves, as illust ...re 4]] is a typical semi-log plot of buildup test data. The “correct” semi-log straight line is indicated on these figures; the line is identified with th
    15 KB (2,314 words) - 17:45, 21 January 2022
  • Full waveform acoustic logging
    ...ging—a brief perspective: Transactions of the Society of Professional Well Log Analysts 27th Annual Logging Symposium, Paper AAA.</ref> ...ee wave arrivals that can easily be identified in a full waveform acoustic log.<ref name=pt07r6>Cheng, C. H., and M. N. Toksöz, 1981, Elastic wave propag
    10 KB (1,530 words) - 20:47, 19 January 2022
  • Sandstone permeability estimation from cuttings
    ...m/data/specpubs/fieldst4/data/a013/a013/0001/0200/0205.htm Integrated rock-log calibration in the Elmworth field—Alberta, Canada: part I: reservoir rock ...es from cuttings is made by comparing pore types with production tests and log analysis. The pore types are as follows:
    6 KB (882 words) - 17:19, 6 April 2022
  • Reservoir drive mechanisms
    ...rive is more effective in oil reservoirs than in gas reservoirs. On a semi-log plot of production decline, the curve tends to be flat. ...reduced. Its production decline curve trends more concave upward on a semi-log plot than a decline curve for a strong water drive.
    7 KB (1,052 words) - 18:45, 1 April 2022
  • Stratigraphically complex fields
    * Vertical and lateral changes in wireline log character ...{{figure number|1}}Example of electrofacies map showing distribution of SP log patterns. (From Galloway and Cheng.<ref name=pt06r35>Galloway, W. E., Cheng
    8 KB (983 words) - 20:49, 19 January 2022
  • Guará Formation
    Guara_03.jpg|{{figure number|3}}Vertical log and section showing the fluvial facies of Guará Formation northern portion Guara_04.jpg|{{figure number|4}}Vertical log of Guará Formation near the Brazil-Uruguay frontier, showing facies exampl
    6 KB (856 words) - 19:51, 2 April 2019
  • Geology workstation
    ...cal depth, true stratigraphic thickness, and so on. Equal in importance is log information, including curves or traces, logging parameters such as mud typ ...f text or numerical values; (2) digitizing from a map, seismic section, or log print; (3) extracting or downloading from another computer system followed
    19 KB (2,872 words) - 14:28, 20 January 2022
  • Pressure prediction: reconstructing burial history
    * [[Pressure prediction: analysis of well-log and seismic data]]
    3 KB (408 words) - 17:56, 17 February 2022
  • Subsurface team
    | Petrophysicist || A key task is to [[Log interpretation|analyze wireline logs]] to quantify the rock and fluid prope
    3 KB (424 words) - 14:54, 10 November 2014
  • Standard interpretation
    ...s of determining volumes of hydrocarbons in place from wireline logs, or [[log interpretation]]. This process requires four basic steps: ...mating shale volume from the [[Basic open hole tools#Gamma ray|gamma ray]] log are the linear and the nonlinear estimators. Both methods require determini
    25 KB (3,776 words) - 19:53, 18 January 2022
  • Petroleum exploration
    UGM_Petroleum_Exploration_Fig_10.png|{{figure number|10}}Well log obtained from wireline logging (Source: [https://www.usgs.gov/ U.S. Geologi ...Density; electric log, consists of SP and resistivity; acoustic log; image log; and sampling. Logging will provide information of rock or fluid properties
    15 KB (2,331 words) - 19:12, 17 April 2019
  • Mudlogging: gas extraction and monitoring
    ...are sufficient alone or in combination to invalidate the total hydrocarbon log as an indicator of gas-filled porosity in the formation. It does mean, howe ...ydrocarbon well logging recommended practice: Society of Professional Well Log Analysts.</ref> has published standards for the calibrating of total gas an
    9 KB (1,327 words) - 15:28, 24 January 2022
  • Weyburn seal capacity
    ...consists of rocks with appreciable [[porosity]], local oil staining, local log-calculated water saturations less than 100%, and the capability of producin :<math>\log \mbox{R}_{\rm tt} = 0.353 + 0.427 \log \mbox{K}_{\rm a} - 0.184 \log \phi</math>
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  • Uncertainties impacting reserves, revenue, and costs
    ...vant data, especially maps, [[cross section]]s, geophysical data, borehole log interpretations, analogous producing patterns, and other factors. Moreover, ==Lognormality and log probability paper==
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  • Bakken and Three Forks Formations, Williston Basin, North Dakota and Montana (USGS)
    ==Type Log== General type log example, Enerplus Resources USA Corp - Hognose 152-94-18B-19H-TF (Neisheim<
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  • Cross-borehole tomography
    ...nes. Heterogeneity of the lower reservoir is documented by the contrast in log curves and the corresponding change in the tomographic velocity fields. (Af ...nting cross-borehole tomography interpretation across thermal EOR project. Log-defined stratigraphic units and fluid saturation zones correlate with tomog
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  • Wettability
    ...the area (''A''<sub>1</sub>) under the oil-displacing brine curve with the log of the area (''A''<sub>2</sub>) under the brine-displacing oil curve. The U :<math>W = \log \frac{A_{1}}{A_{2}}</math>
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  • SEM, XRD, CL, and XF methods
    ...portant extensions to [[thin section analysis]] and can be tied closely to log response and productivity. Table 1 summarizes the relative values of each a ...metry; grain morphology; diagenetic sequences; microtextures. Ties to some log response and ''φ-k'' analyses. ||
    11 KB (1,477 words) - 15:25, 24 January 2022
  • Wiki write off
    ; December 2014: [[Well log analysis for reservoir characterization]], by Universitas Gadjah Mada
    3 KB (399 words) - 12:51, 28 September 2015
  • Paleogeography and prospect identification
    ...ismic facies]] and biostratigraphic data into a grid of stratigraphic well-log [[cross section]]s if wells are available.
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  • Oilfield water analysis
    ...its saturation (''S''<sub>w</sub>) in the producing formation by wireline log analysis. Consequently, some well logging societies have compiled ''R''<sub * [[Core-log transformations and porosity-permeability relationships]]
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  • Pressure prediction: analysis of mud weights
    * [[Pressure prediction: analysis of well-log and seismic data]]
    4 KB (572 words) - 17:56, 17 February 2022
  • Production testing
    ...ing pressure measurements are converted to bottomhole conditions and a log-log plot of <math>\bar{p}^{2} - p_{\rm wf}^{2}</math> versus flow rate, ''q'', ...{n}} \mbox{ versus } \frac{1}{q_{n}} \sum\limits_{j=0}^{n-1} \Delta q_{j} \log (t_{n} - t_{j})</math>
    14 KB (2,165 words) - 18:42, 20 January 2022
  • Two-dimensional geophysical workstation interpretation: generic problems and solutions
    ...n help to identify seismic reflections representing geological interfaces. Log models can also be converted to 2-D synthetic seismic models by integrating ...solutions_fig3.png|Figure 3]]). When concatenated to a well, the wellbore, log curves, and geological tops can be displayed with the seismic. A three-dime
    20 KB (2,848 words) - 14:29, 20 January 2022
  • Lithofacies maps
    ...name=Hamiltonetal_2002 />). SP = spontaneous potential log; GR = gamma-ray log.]] ...ar complexes, whereas multiple, thin serrated and subtly upward-coarsening log facies are interpreted as strand plain complexes flanking the delta front.
    21 KB (3,139 words) - 16:54, 6 April 2016
  • Open hole tools
    basic-open-hole-tools_fig1.png|{{figure number|1}}A typical log showing SP, gamma ray, dual Induction, and sonic measurements. &copy; Schlu basic-open-hole-tools_fig2.png|{{figure number|2}}A typical log showing density, compensated neutron, Pe, gamma ray, and caliper measuremen
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  • Reservoir engineering
    ...m conventional core analysis or by the approach through equations based on log analysis. Empirical equation that can be used is : ...g [ \log(\mu_{OD} + 1)] = 1.8653 - 0.025086(^{\circ} \text{API}) - 0.5644 \log{T}</math>
    14 KB (2,122 words) - 17:33, 7 March 2016
  • Procedure for basin-fill analysis
    ...rom seismic sections with sequence stratigraphic interpretations from well log [[cross section]]s.
    5 KB (599 words) - 18:54, 4 February 2022
  • Reservoir quality
    ...ives.datapages.com/data/alt-browse/aapg-special-volumes/me3.htm Basic well log analysis for geologists]: AAPG Methods in Exploration Series 3, 216 p.</ref ...tative indicator of the permeability of a formation. (For more on wireline log response to reservoir properties, see [[Quick-look lithology from logs]].)
    18 KB (2,514 words) - 17:47, 21 January 2022
  • Lithofacies and environmental analysis of clastic depositional systems
    | [[Dipmeter]] log | [[Formation MicroScanner]] (FMS) log
    38 KB (5,198 words) - 22:11, 15 January 2024
  • Reserves estimation
    * ''h'' = height or thickness of pay zone (ft) from log and/or [[Overview of routine core analysis|core data]] * ø = [[porosity]] (decimal) from log and/or core data
    16 KB (2,550 words) - 17:47, 21 January 2022
  • Log analysis: lithology
    ...ome commonly encountered lithologies and their characteristics relative to log responses. * Analysis of log responses
    25 KB (3,189 words) - 17:24, 18 January 2022
  • Fault-dependent leak points, continuity, and charge
    ...r68>Shea, W. T., J. R. Schwalbach, and D. M. Allard, 1993, Integrated rock-log evaluation of fluvio-lacustrine seals, in J. Ebanks, J. Kaldi, and C. Vavra
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  • Pore system shapes
    ...ration (S<sub>w</sub>) of rocks with Archie porosity can be predicted from log analysis using the [[Archie equation]]
    4 KB (528 words) - 13:53, 4 April 2022
  • Data: sources
    * wireline-log and logging-while-drilling (LWD) data * production-log data
    43 KB (6,686 words) - 13:44, 18 March 2019
  • Molyneux:sandbox
    * [[Spontaneous potential log]]
    5 KB (543 words) - 23:45, 8 January 2015
  • Flow units for reservoir characterization
    ...on the wireline log suite available in a particular reservoir. (See [[Core-log transformations and porosity-permeability relationships]].) ...lable, cuttings, sidewall cores, patterns of textural change inferred from log signatures, cementation or shales detected on logs, downhole images of the
    16 KB (2,282 words) - 20:46, 19 January 2022
  • Overview of routine core analysis
    ...3–90.</ref> Data from continuous core are typically combined with wireline log and formation test data to evaluate productivity. Diagenetically altered sa ...Oil, v. 201, p. 29–36.</ref> The analytical results can be used to verify log analysis calculations. Selection of sidewall core points after logging allo
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  • Pressure detection
    :<math>d \mbox{ exponent} = \frac{\log \displaystyle\frac{R}{60N}}{\log \displaystyle\frac{12W}{10^{6}D}}</math> ...l subsurface pressures measured from conductivity or resistivity logs: The Log Analyst, v. 6, p. 26-38.</ref>
    16 KB (2,450 words) - 21:42, 20 January 2022
  • Reservoir modeling for simulation purposes
    ...ck typing for each environment of deposition to estimate permeability from log derived [[porosity]] and estimation of vertical permeability ...ery difficult to determine large scale vertical permeability from core and log data.
    17 KB (2,234 words) - 21:21, 19 January 2022
  • Systems tracts identification
    ...-basin-analysis_fig4-22.png|{{figure number|3}}Interpretation template for log motif analysis. From Armentrout et al.;<ref name=ch04r8 /> courtesy The Geo ..., p. 1–7.</ref><ref name=ch04r101>Vail, P. R., Wornardt, W. W., 1990, Well log seismic stratigraphy: a new tool for exploration in the '90s: Proceedings,
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  • Drill stem testing
    ...will have a unit slope. As these effects diminish, data points on the log-log plot fall below the unit slope line and approach the slowly curving line fo ...see [[:file:drill-stem-testing_fig9.png|Figure 9]]). Now plot ''P'' versus log[(''t'' + Δ''t'')/Δ''t''] for buildup #1 (the first buildup following the
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  • Hydrocarbon accumulation: the seven critical elements
    * Electric log responses
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  • Fault seal analysis example: Gulf Coast
    ...djacent well logs to fit the stratigraphic cutoffs on the FPR The detailed log stratigraphy is necessary for reliably calculating SGR. The rubber-banding
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  • Utilization of the industrial revolution 4.0 in oil and gas exploration
    ====Well log Correlation==== ....<ref name=Miahetal_2020>Miah, M. I., Zendehboudi, S., & Ahmed, S. (2020). Log data-driven model and feature ranking for water saturation prediction using
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  • Carbonate diagenesis
    ...les. The descriptions are correlated with [[Basic open hole tools|wireline log]] responses and incorporated into geological facies and/or diagenetic model ===Relationships between rock fabric and wireline log response===
    23 KB (3,026 words) - 20:48, 19 January 2022
  • Rock physics analysis for reservoir identification
    ...A (clean sandstone) and Sand B (clayey sandstone as indicated by gamma ray log) have different density and wave velocities compared to the claystones, eve ...WikiWriteOff2021-Muamamr-Figure1.png|framed|center|{{Figure number|1}}Well log section showing the difference of rock physics properties between clean san
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  • Subsurface maps
    ...(For details of construction of fault plane maps, see [[Conversion of well log data to subsurface stratigraphic and structural information]].) ...hickness is critical in these and other analyses (see [[Conversion of well log data to subsurface stratigraphic and structural information]]).
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  • Pressure prediction: analysis of cuttings
    * [[Pressure prediction: analysis of well-log and seismic data]]
    5 KB (818 words) - 17:56, 17 February 2022
  • Types of wells
    ...eep the well path within the target. This can involve the use of real-time log data but may also include input while drilling from well-site biostratigrap ...hnology, SPE 29242, v. 46, no. 10, p. 848–852.</ref> A catalog of expected log responses, as they would appear in a horizontal trajectory, can be created
    22 KB (3,567 words) - 17:20, 11 March 2019
  • Fractured reservoir evaluation
    ...ictions from standard [[Core description|core]] or [[Basic open hole tools|log analyses]] do not match reservoir performance ...luding their associated well logs) and relevant outcrops. Cores and [[Core-log transformations and porosity-permeability relationships|core-calibrated wel
    26 KB (3,674 words) - 21:21, 19 January 2022
  • Amplitude versus offset (AVO) analysis
    ...ase information upon which to judge and interpret the AVO study using well log data in the vicinity of an exploration target.
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  • Biostratigraphy in sequence stratigraphy
    ...integrated with [[Seismic data|seismic]] and [[Basic open hole tools|well log data]], are an integral part of sequence stratigraphic analysis. [[Paleonto ...e than [[Seismic data|seismic reflectors]] or [[Basic open hole tools|well log]] picks. Correlation across [[growth fault]]s, where stratal thickness and
    16 KB (2,247 words) - 19:23, 24 January 2022
  • Well types
    ...eep the well path within the target. This can involve the use of real-time log data but may also include input while drilling from well-site [[Biostratigr ...Technology, SPE 29242, v. 46, no. 1, p. 3-12.</ref> A catalog of expected log responses, as they would appear in a horizontal trajectory, can be created
    24 KB (3,753 words) - 19:33, 3 March 2016
  • Seal capacity of different rock types
    ...68>Shea, W., T., Schwalbach, J., R., Allard, D., M., 1993, Integrated rock-log evaluation of fluvio-lacustrine seals, in Ebanks, J., Kaldi, J., Vavra, C.,
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  • Yowlumne field
    file:mth14ch02f03.jpg|{{figure number|3}}Type log for Yowlumne field with reservoir statistics and rock properties of the Yow Well-log correlations and 3-D seismic data indicate downlap within the fan, with bas
    13 KB (1,896 words) - 19:02, 11 March 2019
  • Scientific method: application to exploration
    ...ebster.com/dictionary/outcrop outcrop], [[Seismic data|seismic]], and well log data
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  • Diagenetically complex reservoir evaluation
    ===Step 3. Lithology-log response analysis=== ...or the objectives of the study, so the geologist must attempt to correlate log response with lithological data from intervals containing full diameter or
    31 KB (4,171 words) - 18:22, 21 January 2022
  • Definitions of depositional system elements
    ...The GOM basin analysis example in this chapter is based primarily on well log and [[seismic data]] interpretation using this passive margin sequence stra
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  • Mancos Shale Play in New Mexico
    ...e than 70 years. [[:file:Figure1MancosCommRept.jpg|Figure 1]] shows a type log through the Cretaceous section of the San Juan Basin.
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  • Relationship between porosity and permeability on fractured basement reservoir
    ...rom the formation, include permeability distribution, can be achieved from log data of a well without core. But, in carbonaceous rock formation, where unc ...ohm- m. The average porosity of the reservoir (17%) obtained from neutron log. Mud loss is thought to occur when drilling these wells. Analysis of the pr
    29 KB (4,601 words) - 16:09, 12 April 2016
  • Top seal ductility estimation
    ...uctility of a top seal]] can be estimated (1) by using laboratory data and log-derived density values that reflect the compaction state or (2) by comparin
    7 KB (1,000 words) - 15:22, 30 March 2022
  • Electrical methods
    ...vities measured by well logs and those measured by electrical methods, the log is used to investigate properties only in the immediate vicinity of the wel
    15 KB (2,130 words) - 21:19, 19 January 2022
  • Static gas pressure gradient estimation
    ...opyright: Gearhart-Owens.<ref name=G-O>Gearhart-Owens Industries, 1972, GO Log Interpretation Reference Data Handbook:
    7 KB (979 words) - 15:24, 17 February 2022
  • Cross-well electromagnetic tomography monitoring of fluid distribution
    ...istivity log, which is a plot of resistivity versus depth. The resistivity log reflects the nature of hydrocarbon presence in the penetrated formation. Th ...e borehole, the logged information is between an interval of depths, so to log the data, multiple receivers stay at a separated interval while the transmi
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  • Dipmeter
    ...evaluation of high resolution dipmeter data: Society of Professional Well Log Analysts' 25th Annual Logging Symposium, vol. 2, paper YY, 24 p. ...p://store.aapg.org/detail.aspx?id=832 Consider Dipmeter and Borehole Image Log Technology-AAPG Memoir 92]
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  • Drilling a well
    ...a well site geologist present at the rig site who will draw up a lithology log from examination of the cuttings. The objective is to analyze the lithostra ...ervoir lithologies and fluids based on an analysis of the various types of log response. For instance, some wireline logs will allow the porosity of the r
    15 KB (2,385 words) - 15:05, 1 August 2016
  • Sorrento field: water saturation
    ...the reservoir is somewhat shaly. However, ''n'' was assumed equal to 2 for log calculations because the lab data were not far from that value and because
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  • Deep-water marine reservoirs
    ...esponse in the channel axis, with lower net-to-gross values and a serrated log response toward the margins ([[:File:M91FG193.JPG|Figure 1]]). In core, cha
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  • Rate of penetration
    The ROP log is the first source of data that can be used to correlate to nearby wells.
    7 KB (1,049 words) - 19:02, 20 January 2022
  • Geological heterogeneities
    ...sed during coring). The use of [[Quick-look lithology from logs#Log shapes|log shapes]] for facies recognition, as well as [[Sidewall coring|sidewall samp
    17 KB (2,232 words) - 21:22, 19 January 2022
  • East Breaks hydrocarbon accumulation model
    ...rofile across the East Breaks 160-161 field, showing the 160 No. 1 well SP log and [[synthetic seismogram]] and two schematic diagrams for interpreting po
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  • Ti in zircon geothermometer
    [[File:Log(Ti) vs T graph.jpeg|thumbnail|right|Plot of Ti abundance (log of Ti ppm) versus Temperature in Celsius. Simplified version, modified from
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  • Mudlogging: equipment, services, and personnel
    ...oduction equipment''—A typewriter, plotter, and copy system are needed for log reproduction.
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  • Fluid flow fundamentals
    ...wells. Values of ''n'' and ''c'' can be determined graphically from a log-log plot of multiple rate test data in the form of (''p''<sub>R</sub><sup>2</su
    20 KB (3,155 words) - 21:20, 19 January 2022
  • Delta plain, lower
    ...rd sequence (or inverted bell-shaped logs) becomes the most common type of log response. Within the overall sand body there are areas where sands have not ...is an extremely complex process, and in many areas is simply an accident. Log jams, loss of gradient advantage, infilling during a catastrophic period (s
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  • Condensate banking effect
    [[file:AlAhmadiTawfiqFigure9.jpg|thumb|300px|{{figure number|9}}Log-log plot of a well in two regions with varying mobility ratios.<ref name=Houzee
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  • Porosity
    ...analysis|cores]]. The [[Basic open hole tools#Compensated neutron|neutron log]], however, would enlarge the definition to include structural hydroxyl che * [[Core-log transformations and porosity-permeability relationships]]
    24 KB (3,450 words) - 19:09, 20 January 2022
  • Depositional sequence analysis of plays
    # Using seismic lines and/or log [[cross section]]s, determine the systems tract type for intervals of inter
    8 KB (1,184 words) - 20:44, 4 February 2022
  • Waterflooding
    ...r each permeability. From a plot of ''k'' versus percent greater than on a log probability graph sheet (as shown in [[:file:waterflooding_fig2.png|Figure
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  • Delta plain, upper
    ...ntative electric logs (lower right) at selected sites to show variation in log shape. As this diagram illustrates, the typical vertical sequence is charac ...fined on the logs. Although distinctive cycles can often be discerned from log data, it is very likely that individual units cannot be carried laterally a
    33 KB (4,905 words) - 16:40, 6 April 2016
  • Basin modeling: identifying and quantifying significant uncertainties
    ...imple distributions such as uniform (rectangular), triangular, normal, and log normal are commonly used, but any distribution can be used as long as it ho ...nado chart ([[:file:H4CH12FG6.JPG|Figure 6]]). The yields are plotted on a log scale to more clearly examine the low-yield (high-risk) cases. Analysis of
    38 KB (5,890 words) - 15:16, 23 August 2016
  • Mudstones
    ...igraphic study of mudstone heterogeneity: A combined petrographic wireline log investigation of Upper Jurassic mudstones from the North Sea (UK), in M. Lo
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  • Permeability
    ...r 2–5, SPE 18167.</ref> (For more on porosity, see [[Porosity]] and [[Core-log transformations and porosity-permeability relationships]].) * [[Core-log transformations and porosity-permeability relationships]]
    19 KB (2,716 words) - 19:02, 20 January 2022
  • Checkshots and vertical seismic profiles
    ...al, and J. Bowles, 1979, An investigation into discrepancies between sonic log and seismic check-shot velocities: Australian Exploration Association Journ
    11 KB (1,599 words) - 20:48, 19 January 2022
  • FWhitehurst sandbox
    * density (but not density log) http://physics.about.com/od/fluidmechanics/f/density.htm
    22 KB (3,024 words) - 21:42, 19 December 2014
  • Mudlogging: drill cuttings analysis
    * Verification of wireline log response
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  • Identifying depositional sequences in seismic sections
    ...seismic sequences with sequences identified from biostratigraphic and well log data to see if they make geologic sense. Identifying depositional sequences
    10 KB (1,394 words) - 21:47, 22 February 2022
  • Austin Chalk, onshore U.S. Gulf Coast
    ...the Austin Chalk Group in subsurface. Loucks et al. (2020a) performed core-log calibration and defined basic lithofacies based on a type core in south Tex
    8 KB (1,200 words) - 21:22, 3 March 2022
  • Borehole imaging devices
    ...-1987-v28n3a4 Formation imaging with microelectrical scanning arrays]: The Log Analyst, v. 28, p. 294–306.</ref>
    10 KB (1,313 words) - 16:24, 18 January 2022
  • Basin-centered gas systems: evaluation and exploration strategies
    ...ing, more than 400 open fractures were detected on a Formation MicroImager log from a 1750 ft (533 m)-long horizontally drilled leg in the Upper Cretaceou ...ng tools, such as levels of thermal maturity, present-day temperature, and log responses, may be determined. Examples of such analog studies include the P
    34 KB (5,070 words) - 15:11, 23 August 2016
  • Paleoenvironmental analysis
    ...with interpretations based on other data sources (e.g., sedimentology well log analysis, seismic) and plotted on wells or [[cross section]]s.
    10 KB (1,252 words) - 19:55, 31 January 2022
  • Thin section analysis
    ...s [[porosity]] and [[permeability]]), and [[Basic open hole tools|wireline log]] responses. They are also better because sample damage tends to be minimal ...s are less desirable because sampling sites are remotely selected based on log responses and because sample size is small. This introduces the possibility
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  • Sandstone
    :<math>\phi = -\log 2d</math>
    10 KB (1,508 words) - 15:44, 22 March 2019
  • Identifying sea level cycle phase with biostratigraphy
    ...basin-analysis_fig4-31.png|Figure 1]] is a spontaneous potential (SP) well log illustrating the subdivision of the ''Glob alt'' depositional cycle into th
    11 KB (1,548 words) - 16:58, 24 February 2022
  • Seismic data - mapping with two-dimensional data
    ...c logs and show the cumulative travel time through the rocks where a sonic log was run. Knowing the cumulative travel time for a given depth, one can calc
    13 KB (1,936 words) - 21:29, 21 January 2022
  • Vaca Muerta, La Luna Shale, South America
    ...ears, seismic imaging and mapping, as well as petrophysical evaluation and log correlation, has focused upon the intervals observed within the Vaca Muerta
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  • Prudhoe Bay field
    file:Mth14ch07f02.jpg|{{figure number|2}}Prudhoe Bay type log depicting formal stratigraphic nomenclature and informal, operationally bas
    11 KB (1,634 words) - 16:34, 26 April 2016
  • Meandering fluvial reservoirs
    ...tive. They consider that only limited inferences can be made from core and log data as to the overall geometry of a fluvial reservoir in the subsurface (e ...on the gamma-ray log. Caution should be taken where a shale-like wireline log response is seen within thick multistory fluvial sandstones.
    32 KB (4,727 words) - 21:03, 15 January 2024
  • Dolomite and dolomitization: Implications for reservoir characterization
    ...physical logs (gamma ray, density, sonic etc; Fig. 15). The Gamma ray (GR) log response of dolostone / dolomite-rich carbonates can be lower than the shal Usually GR log is used to demarcate shale and non-shale (limestone, dolostone) lithology.
    38 KB (4,996 words) - 21:07, 21 April 2022
  • Shale-oil resource systems
    A geochemical log of this well demonstrates oil crossover in the 1371.6 to 1417.3 m (4500–4 ...3/day (516 bbl/day) and 2.20 times 104 m3/day (778 mcf/day). A geochemical log of this well illustrates its much higher thermal maturity, explaining the h
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  • Wattenberg field
    ...ckness from 100 to 140 ft in mapped area. Contour interval 20 ft. (B) Well log illustrating Plainview/Lytle section and perforated interval. Initial produ file:M125-WattenbergField-Figure10.jpg|{{Figure number|10}}Type log for Wattenberg Field. Curves shown are gamma ray, spontaneous potential, re
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  • Biostratigraphic applications in hydrocarbon exploration
    ...of wellsite biostratigraphy in integration with lithological description, log correlation and seismic interpretations is greatly used in the drilling ope
    14 KB (1,899 words) - 21:03, 21 April 2022
  • Delta plain, subaqueous
    ...show very erratic sand distribution in the distributary channel. Electric-log responses and their variations are shown in the lower right-hand diagram of ...ated into the linear type of ridges seen topographically in modern deltas. Log response (lower right diagram, [[:file:M31F22.jpg|Figure 7]]) displays extr
    60 KB (9,022 words) - 17:17, 21 March 2016
  • Statistics overview
    ...in the scale of measurement. [[Basic open hole tools#Gamma ray|Gamma ray]] log values, the porosity or permeability of a rock, or the subsea elevation of
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  • Fluid contacts
    ...e hydrocarbons might be interpreted as part of a transition zone from well log or [[Overview of routine core analysis#Residual fluid saturation|core analy
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  • Kingfisher field
    ...ation of maximum flooding surface [[shale]]s from biostratigraphy and well log data sets. Based on the Shell stratigraphic scheme, the Brae sandstone memb
    16 KB (2,358 words) - 16:28, 11 January 2024
  • Subsurface diagenesis and its relation with diagenetic trap on carbonate rocks reservoir
    ...osity and permeability in light rocks (Dawson, 1988). Seismic and wireline log data can’t distinguish cementation, compaction, recrystallization, dissol
    16 KB (2,395 words) - 21:18, 9 January 2024
  • Paleontology
    ...s, and [[Thin section analysis|thin sections]] complement petrographic and log analyses and aid in the recognition of reservoir quality rocks.
    17 KB (2,331 words) - 20:11, 10 August 2016
  • Mudstone nomenclature
    * They provide a tie to well-log and seismic data. ...s are linked to rock properties of economic interest, provide ties to well-log and seismic data, reveal depositional conditions, and highlight long-term a
    58 KB (8,391 words) - 19:46, 20 February 2024
  • Rock-water reaction
    * [[Core-log transformations and porosity-permeability relationships]]
    17 KB (2,356 words) - 19:24, 19 January 2022
  • Deltaic reservoirs
    ...various types of delta can often be recognized on isochore, net-sand, and log-facies maps.<ref name=Colemanandwright_1975>Coleman, J. M., and L. D. Wrigh [[file:M91FG187.JPG|thumb|300px|{{figure number|6}}Idealized log and permeability profiles for deltaic sand bodies (from Sneider et al.<ref
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  • Rock-water reaction: formation damage
    * [[Core-log transformations and porosity-permeability relationships]]
    17 KB (2,380 words) - 18:23, 21 January 2022
  • West Texas Super Basin
    ...Udden<ref name=Uddn1915 />, obtained as many drillers (mostly water well) log descriptions as possible and made isopach maps of those red beds ([[:file:M ...on the southern half of cross section A-A’. (C) Gamma Ray–Density-Neutron log across the Wolfcamp C showing a representative sandstone, 9’ thick, 14% a
    157 KB (23,278 words) - 18:36, 16 January 2024
  • Siliciclastic shorelines and barrier island reservoirs
    M91Ch6FG42.JPG|{{figure number|4}}Example of a sedimentological core log, Well d-2-C/94a-16, Peejay field, Canada (after Caplan and Moslow).<ref>Cap
    18 KB (2,607 words) - 15:33, 15 January 2024
  • Influence of mechanical stratigraphy on deformation styles
    The petrophysical log has been studied for Peak Tavis Formation where fractures are a direct resu
    23 KB (3,162 words) - 17:28, 5 December 2023
  • Capillary pressure
    * [[Core-log transformations and porosity-permeability relationships]]
    23 KB (3,315 words) - 16:59, 19 January 2022
  • Appalachian Basin Marcellus gas play
    ...elation between the organic content of Appalachian shales and the wireline log gamma-ray intensity. Significant TOC content (5%) can be identified with ga [[File:M97Ch4FG11.jpg|400px|thumb|{{figure number|11}}A typical gamma-ray log of the Marcellus Shale interval in southwestern Pennsylvania with selected
    89 KB (13,415 words) - 19:16, 16 January 2024
  • Contouring geological data with a computer
    * [[Log analysis applications]]
    25 KB (3,597 words) - 20:49, 19 January 2022
  • Faults: structural geology
    ...ter whereas the production geologist analyzes the structures from core and log data. Having established a fault framework for a field, it is important to ..., p. 71–86.</ref> A sharp change in dip amplitude or azimuth on a dipmeter log can indicate that a fault is present. Drag patterns may also be seen on the
    63 KB (9,496 words) - 16:51, 15 January 2024
  • Basin-centered gas systems: global distribution
    ...http://archives.datapages.com/data/specpubs/memoir61/ch22/0333.htm A sonic log study of abnormally pressured zones in the Powder River basin of Wyoming],
    27 KB (3,753 words) - 14:53, 12 March 2019
  • Basin-centered gas systems: development
    ...http://archives.datapages.com/data/specpubs/memoir61/ch22/0333.htm A sonic log study of abnormally pressured zones in the Powder River basin of Wyoming],
    34 KB (4,772 words) - 14:44, 12 March 2019
  • Super basins
    ...n SPWLA 58th Annual Logging Symposium. Society of Petrophysicists and Well-Log Analysts.</ref><ref name=Kvaleandrahman_2016>Kvale, E.P. and “Wahid” Ra
    27 KB (3,791 words) - 19:35, 11 October 2022
  • Using and improving surface models built by computer
    * [[Log analysis applications]]
    40 KB (6,039 words) - 20:49, 19 January 2022
  • Carbon dioxide (CO2) storage
    ...t done using a large 2-D seismic data set complemented with available well-log control and petrophysical data. The aim during this phase is to identify re
    37 KB (5,487 words) - 21:14, 11 March 2019
  • Sill intrusion mechanism, parameters, and temperature effect of sills on a petroleum system
    ...2021-Polishchuk-Figure8.png|thumbnail|Figure 8 Interpreting sils from well log data. The figure is from Mark et al., 2018]]
    29 KB (4,365 words) - 21:07, 21 April 2022
  • Shale-gas resource systems
    ...tention and storage capacity for petroleum was largely ignored and mud gas log responses noted with the somewhat derogatory shale-gas moniker. Because the
    73 KB (10,728 words) - 18:16, 11 January 2024
  • Three-dimensional modeling of clinoforms in shallow-marine reservoirs
    ...e of the model fills the gap between detailed but sparse 2-D core and well-log data and low-resolution but extensive 3-D seismic data.
    113 KB (16,689 words) - 22:11, 15 January 2024
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