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• Sea level cycles and carbonate diagenesis
  ...he unconformity. The unconformity may be recognized in well logs by a high gamma ray count due to glauconite or uranium if the unconformity is covered by ma
  7 KB (960 words) - 21:00, 6 April 2022
• Dipmeter
  ...cording of the raw dipmeter data showing the orientation curves, calipers, gamma ray, and correlation curves from a six-arm tool. Note that the curves are r ...g4.png|Figure 4]] is a standard arrow plot that also carries a correlation gamma ray curve and maximum and minimum caliper values. On the right-hand side is
  14 KB (2,128 words) - 17:25, 18 January 2022
• Statistics overview
  ...y value within the scale of measurement. [[Basic open hole tools#Gamma ray|Gamma ray]] log values, the porosity or permeability of a rock, or the subsea ele
  16 KB (2,483 words) - 19:28, 19 January 2022
• Sidewall coring
  ...d logged. The tools can be precisely positioned in zones of interest using gamma logs or SP logs as guides. Percussion or rotary drilled samples provide sma
  7 KB (1,100 words) - 21:16, 19 January 2022
• China Shale Gas & Liquids - Sichuan Basin
  ...g shale interval, or called “high quality shale”, is characterized by high gamma ray (GR), high uranium (U), high acoustic (AC) and low density (DEN) (Fig.
  7 KB (985 words) - 18:54, 4 December 2023
• Jordan petroleum geology
  ...s of greater than 1–2%, depending on the degree of [[thermal maturation]]. Gamma-ray values in some wells have been adjusted according to [[offset]] shale b
  16 KB (2,310 words) - 15:13, 19 January 2017
• Reservoir quality
  ...n they provide: (1) lithology indicators—[[Basic open hole tools#Gamma ray|gamma ray]], [[Basic open hole tools#Sonic|sonic]], [[Basic open hole tools#Densi
  18 KB (2,514 words) - 17:47, 21 January 2022
• Surficial geochemistry and hydrocarbon detection methods
  ...metrics),<ref name=ch18r11>Curry, W., H., III, 1984, Evaluation of surface gamma radiation surveys for petroleum exploration in the deep Powder River basin,
  10 KB (1,443 words) - 16:08, 25 January 2022
• South Pass 62 field
  ...extreme variations in thickness. Thicknesses ocassionally exceed 100 m. On gamma-ray logs, the M is blocky, with a sharp base and top. On seismic data and i
  9 KB (1,290 words) - 21:18, 19 October 2016
• Deep-water marine reservoirs
  ...aubouef<ref name=BB2004 />). The lower section shows a series of idealized gamma ray logs.]] ...eprinted with permission from, and &copy; by, the Geological Society. GR = Gamma Ray; RFTtrade = Repeat Formation Tester; UKCF = Upper Kimmeridge Clay Forma
  20 KB (2,850 words) - 15:33, 15 January 2024
• Magnetics
  ...ssed to produce total intensity [[contour]] maps (with intervals down to 1 gamma and occasionally less) and digital data files. The processing often include
  10 KB (1,481 words) - 15:39, 24 January 2022
• Weyburn seal capacity
  :<math>\mbox{h} = \frac{0.670 \times \gamma \cos \theta}{\mbox{R}_{\rm bt}(\rho_{\rm w} - \rho_{\rm h})}</math>
  10 KB (1,484 words) - 20:55, 4 December 2023
• Lithofacies maps
  ...t al.<ref name=Hamiltonetal_2002 />). SP = spontaneous potential log; GR = gamma-ray log.]] ...etin, v. 56, no. 8, p. 1541–1544.</ref> For each well, a paper copy of the gamma-ray log is trimmed to the top and base of the reservoir unit of interest an
  21 KB (3,139 words) - 16:54, 6 April 2016
• Petroleum exploration
  .... There are various type of wireline logging: radioactive log, consists of Gamma Ray, Neutron, and Density; electric log, consists of SP and resistivity; ac
  15 KB (2,331 words) - 19:12, 17 April 2019
• Rock physics analysis for reservoir identification
  ...here Sand A (clean sandstone) and Sand B (clayey sandstone as indicated by gamma ray log) have different density and wave velocities compared to the claysto
  15 KB (2,356 words) - 18:00, 26 April 2022
• Wattenberg field
  ...10.jpg|{{Figure number|10}}Type log for Wattenberg Field. Curves shown are gamma ray, spontaneous potential, resistivity, and neutron/density. Black bar in ...0.jpg|{{Figure number|20}}(A) Type log Codell Sandstone, Wattenberg Field. Gamma ray, spontaneous potential, resistivity, neutron, and density curves shown.
  72 KB (10,249 words) - 20:06, 15 January 2024
• Structurally complex reservoirs: evaluation
  ...ined on the electric logs by repetition or omission of parts of the SP and gamma ray signatures compared to a reference well that is believed to show an unf
  20 KB (2,865 words) - 19:24, 19 January 2022
• Appalachian Basin Marcellus gas play
  ...particularly in southwestern Pennsylvania and northern West Virginia, peak gamma-ray counts in excess of 300 to 400 API are not uncommon and reflect the gen ...als. G/C3 = matrix density ρmatrix (in grams per cubic centimeter); GAPI = gamma-ray API units; SEM = scanning electron microscope; TVD = true vertical dept
  89 KB (13,415 words) - 19:16, 16 January 2024
• Dolomite and dolomitization: Implications for reservoir characterization
  ...ace using petrophysical logs (gamma ray, density, sonic etc; Fig. 15). The Gamma ray (GR) log response of dolostone / dolomite-rich carbonates can be lower
  38 KB (4,996 words) - 21:07, 21 April 2022
• Introduction to biosteering operation
  ...ate of penetration (ROP), Weight on bit (WOB), Near-bit inclination (NBI), Gamma Ray (GR) and few other parameters. The sonde GR instrument is often placed
  20 KB (2,916 words) - 21:04, 21 April 2022

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