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• Sorrento field: water saturation
  ...ociation of Geologists Symposium, p. 91-100.</ref> This study of cores and logs from four field wells shows how multiple oil–water contacts and apparent ...sity|Density logs]] were the primary source of [[porosity]] values. Matrix density appears to be about 2.68 g/cc, based on core-measured grain densities (cons
  7 KB (1,044 words) - 16:57, 13 April 2022
• Tool table
  | [[Basic open hole tools#Density|Density]] || 6 || 16 || √ || √ || √ || √ || √ || √ || 0–2.0 || × || * [[Quick-look lithology from logs]]
  5 KB (544 words) - 16:27, 18 January 2022
• Natural hydraulic fracturing of top seals
  ...nsity logs to calculate overburden stress. For example, a 1-cm cube with a density of 2.4 g/cm³ exerts an overburden stress of 2.4 g/cm² ...borehole breakouts], in A. Hurst, ed., Geological Applications of Wireline Logs: Geological Society of London Special Publication 48, p. 327–338.</ref>
  9 KB (1,274 words) - 15:44, 30 March 2022
• Seismic facies analysis
  ...on with lithofacies interpreted from [[Quick-look lithology from logs|well logs]], [[Core description|cores]], and [[Mudlogging: drill cuttings analysis|cu * Velocity and density contrasts of individual interfaces
  6 KB (809 words) - 17:46, 4 February 2022
• Pressure detection
  ...of pressure above normal follows the aquathermal gradient (constant water density) and then follows the fracture gradient.<ref name=pt03r8>Barker, C., and B. ...of abnormally high [[porosity]]) than normal shales at a given depth. The density of shale cuttings can be measured by several methods. Also, the shape of dr
  16 KB (2,450 words) - 21:42, 20 January 2022
• Seismic data preparation for mapping
  # Compute a synthetic seismogram for each online well with a sonic or [[density log]]. ...|vertical seismic profile (VSP)]], synthetic seismogram, or time-stretched logs.
  7 KB (1,064 words) - 19:11, 27 January 2022
• Log analysis: lithology
  ...he difficulty of determining both [[porosity]] and lithology from wireline logs. This article reviews some common techniques that can be used to solve for Identifying the occurrence of difficult lithologies from logs can be formidable. Two crossplot techniques are commonly used to identify t
  25 KB (3,189 words) - 17:24, 18 January 2022
• Open hole tools
  * '''Fluid properties''', which include density, gas to oil ratio, [[API gravity]], water resistivity and salinity, tempera | rowspan = 4 | [[Porosity]] and Lithology || Density
  23 KB (3,350 words) - 17:26, 18 January 2022
• Drilling fluid
  ...on and the subsurface environment. The most critical of the properties are density, [[viscosity]], fluid loss control, and chemical composition. ===Density===
  13 KB (1,866 words) - 21:17, 19 January 2022
• Full waveform acoustic logging
  ...P (compressional) wave traveltime through the rock. Full waveform acoustic logs, however, provide a large amount of other information. This includes S (she ...Elastic wave propagation in a fluid-filled borehole and synthetic acoustic logs: Geophysics, v. 46, p. 1042–1053, DOI: 10.1190/1.1441242.</ref> In order
  10 KB (1,530 words) - 20:47, 19 January 2022
• Reservoir quality
  ...seismic estimates of impedance and the rock properties determined from the logs or in the laboratory. (For information on comparing seismic data to rock pr ...loration Series 3, 216 p.</ref> (For more on the information that wireline logs can provide, see [[Standard interpretation]].)
  18 KB (2,514 words) - 17:47, 21 January 2022
• Data: sources
  ...more detailed and accurate representation will be available once wireline logs have been run and interpreted. ..., vertical permeability, porosity, water saturation, oil saturation, grain density, and sometimes a brief description of the core plug lithology (Table 1). A
  43 KB (6,686 words) - 13:44, 18 March 2019
• Drilling a well
  ...analysis of the various types of log response. For instance, some wireline logs will allow the porosity of the reservoir interval to be determined. Porosit ...he surface, the well is isolated by cement plugs. However, if the wireline logs indicate that the well is likely to produce an economically significant vol
  15 KB (2,385 words) - 15:05, 1 August 2016
• Tight gas reservoirs: evaluation
  ...voir facies in the subsurface Is compiled from observations of cores, well logs, and cross sections. (From Moslow and Tillman.<ref name=pt06r93 />) ...ity gas reservoirs, crossover of the compensated neutron-formation density logs is the most reliable well log for indicating gas-saturated and porous inter
  11 KB (1,444 words) - 21:26, 4 January 2024
• Flow units for reservoir characterization
  {{quotation|3. ''A flow unit zonation is recognizable on wireline logs''.}} ...ity in the subsurface requires that flow units be recognizable on wireline logs. Flow units recognizable only in core are useful only if all wells have bee
  16 KB (2,282 words) - 20:46, 19 January 2022
• Amplitude versus offset (AVO) analysis
  ...ility modeling requires the following: (1) a depth-[[velocity]] model, (2) density and velocity trend curves, (3) [[porosity]] ranges, (4) fluid content varia ...sis_fig5.png|{{figure number|5}}Gas well AVO model, involving blocked well logs and calibrated (wavelet-processed) seismic data.
  12 KB (1,723 words) - 18:41, 20 January 2022
• Fluid contacts
  ...estimation from [http://wiki.seg.org/wiki/Dictionary:Wireline_log wireline logs], estimation from conventional and sidewall cores, and pressure methods. On ...| [[Calculating Sw from the Archie equation|Saturation determination: well logs]] || Estimates fluid contacts from changes in fluid saturations or mobility
  19 KB (2,690 words) - 21:20, 19 January 2022
• Seismic data - creating an integrated structure map
  ...ime picks exist. The wells used as control do not need velocity or density logs but must penetrate the event of interest. The event depth ''z'' (measured f
  7 KB (1,117 words) - 17:51, 25 January 2022
• Lithofacies and environmental analysis of clastic depositional systems
  | Shift to wireline logs | Lithology, [[Quick-look lithology from logs#Log shapes|curve shape]] analysis
  38 KB (5,198 words) - 22:11, 15 January 2024
• Structural play geology
  ...face data into a cohesive whole. Data include [[Basic open hole tools|well logs]], [[Seismic data - creating an integrated structure map|2-D and 3-D seismi | Density contrast Differential loading
  18 KB (2,422 words) - 14:21, 2 February 2022

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