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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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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) - 19:46, 14 January 2015
  • Determining porosity from density-neutron logs
    #REDIRECT [[Density-neutron log porosity]]
    42 bytes (4 words) - 16:56, 19 December 2014
  • Log interpretation
    #REDIRECT [[Log interpretation: initial quick scan]]
    52 bytes (6 words) - 13:43, 12 August 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
  • 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
  • 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>
    10 KB (1,484 words) - 20:55, 4 December 2023
  • 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==
    21 KB (3,123 words) - 19:27, 19 January 2022
  • 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<
    11 KB (1,595 words) - 20:20, 2 June 2021
  • 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
    14 KB (2,060 words) - 20:51, 19 January 2022
  • 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>
    12 KB (1,706 words) - 15:11, 24 January 2022
  • 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.
    4 KB (491 words) - 14:27, 21 March 2022
  • 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]]
    7 KB (1,011 words) - 16:57, 20 January 2022
  • Pressure prediction: analysis of mud weights
    * [[Pressure prediction: analysis of well-log and seismic data]]
    4 KB (572 words) - 17:56, 17 February 2022

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