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• Archie equation
  ...log parameters, the [[water saturation]] (S_w) of the uninvaded zone in a formation next to a borehole. The Archie equation can be expressed as * S_w = water saturation of the uninvaded zone
  5 KB (703 words) - 13:52, 5 April 2022
• Growth fault
  ...one causes normal faults each pair. The process of formation of fault rift zone is typically a part of the formation of sedimentary basins. Initial sedimen
  4 KB (630 words) - 18:28, 2 April 2019
• Seismic inversion
  ...The heavy trace in the center is a sonic log from the producing well. The zone of interest is at 1150 msec. ...version_fig4.png|{{figure number|4}}A schematic diagram of a river channel zone. Copyright: the Taber area of southern Alberta. The 3-D survey was done in
  8 KB (1,196 words) - 18:48, 21 January 2022
• Vertical and lateral seismic resolution and attenuation
  ...ft]] at a depth of [[depth::5000 ft]]. As with the wavelength, the Fresnel zone size also increases rapidly with depth. [[Seismic migration]] effectively collapses the in-line aspect of the Fresnel zone, so this measure of resolution is not appropriate with the migrated seismic
  8 KB (1,164 words) - 20:24, 21 January 2022
• Dip-leaking fault
  ...igher permeability than the wall rock will refract flow lines up the fault zone. Pressure differences along and across faults can also cause down-dip flow
  8 KB (1,130 words) - 17:14, 28 March 2022
• Accumulation
  ...carbon accumulation forms when migrating hydrocarbon filaments encounter a zone (the seal), either laterally or vertically, with pore throat sizes smaller
  1 KB (206 words) - 17:37, 27 January 2015
• Buckles plot
  ...n a Buckles plot where the formation falls below the top of the transition zone.
  1 KB (183 words) - 18:19, 26 March 2015
• Well planning
  * How will the target zone(s) be evaluated? * Anticipated pay zone(s)
  6 KB (779 words) - 15:09, 24 January 2022
• Three-dimensional seismic method
  ...et zone and the aperture size required for adequate imaging of that target zone.<ref name=pt07r64>Yilmaz, O., 1987 Seismic Data Processing: Society of Expl ...migrated section that are easily correlated with reflections outside that zone. When we do 2-D migration, we confine the movement of the energy into the p
  8 KB (1,201 words) - 20:24, 21 January 2022
• Log interpretation: initial quick scan
  ...nd water in a formation. These estimated quantities are used to evaluate a zone and to determine whether a well completion attempt is warranted. As importa
  4 KB (543 words) - 14:11, 21 August 2014
• Water resistivity determination
  ...which is required for the calculation of water saturation in the uninvaded zone. The equation that relates the SSP to measurable quantities, namely, ''R''< ...e SP is outlined as follows. The data required include the SP, the invaded zone resistivity, the formation temperature, and the mud and mud filtrate resist
  13 KB (2,077 words) - 17:26, 18 January 2022
• Hydrostatic pressure-depth plot construction
  ...hydrostatic pressure gradient to determine the expected pressures for the zone of interest as if it had no hydrocarbons. Pressures exceeding hydrostatic p ...than the hydrostatic gradient that may correspond to a hydrocarbon-bearing zone. A hydrostatic pressure–depth plot can be constructed from any of the fol
  7 KB (895 words) - 18:57, 16 February 2022
• Fault seal breakdown during production
  ...pressure will ultimately exceed the [[displacement pressure]] of the fault zone and the fault will [[Cross-leaking faults|cross-leak]].<ref name=ch10r76>Sm ...e differential (AP) increases until the displacement pressure of the fault zone is exceeded and the fault begins to cross-leak. A fault in the Beryl field
  4 KB (530 words) - 15:21, 30 March 2022
• Hydrostatic pressure gradient
  ...hydrostatic pressure gradient to determine the expected pressures for the zone of interest as if it had no hydrocarbons. Pressures exceeding hydrostatic p
  2 KB (207 words) - 18:56, 16 February 2022
• Workovers
  * Well pressure may be a primary consideration. If the open zone has experienced significant depletion, the circulation of fluids becomes di ...and (2) work done to shut off the existing zone in favor of opening a new zone, termed a ''recompletion''.
  12 KB (1,834 words) - 15:25, 24 January 2022
• Overpressure and hydrocarbon distribution, Gulf Coast
  ...hydrocarbons are found near or slightly above the top of the overpressured zone. The chance of success is reduced by 90–95% at depths of 2,000–5,000 ft
  4 KB (605 words) - 20:30, 30 March 2022
• Quantitative fault seal analysis
  ...ealing behavior of faults and the inferred sand–shale content of the fault zone.<ref name=ch10r7>Bouvier, J., D., Kaars-Sijpesteigen, C., H., Kluesner, D., ...R). A fault cross-seals or dip-seals if the sand–shale ratio is low in the zone (low SGR).
  9 KB (1,327 words) - 16:32, 29 March 2022
• Seal failure prediction
  ...zed by a zone of residual petroleum saturation thicker than the transition zone predicted by [[capillary pressure]] tests. Shows in traps that have leaked
  4 KB (571 words) - 18:06, 1 February 2022
• Diagenetic traps: criteria for recognition
  ...ationship between present-day depth and hydrocarbon production for a given zone ...strata form the [[lateral]] seal. The sinuous updip edge is a large waste zone that contains live oil shows in microporous strata, indicating the [[accumu
  5 KB (611 words) - 21:06, 4 February 2022
• Vitrinite reflectance
  Oil and gas zone boundaries can be established using vitrinite reflectance data. The boundar ...retation of the mean value would place this sample past the oil generation zone. The true reflectance of the indigenous vitrinite in this sample is 0.7% R<
  7 KB (970 words) - 14:28, 10 February 2022

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