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• Borehole gravity
  ...ma-gamma [[density log]]. The broader difference anomaly observed over the length of the logged interval is explained by the structural influence of the reef ...g (VSP)]] surveys. The BHGM is stopped at each planned survey level, and a 5- to 10-min reading is taken. The blocky appearance of the log reflects the
  10 KB (1,517 words) - 15:54, 20 January 2022
• Conventional coring
  ...rom [[length::1.5 ft]] for short radius horizontal wells to greater than [[length::400 ft]] for vertical holes. ! Inner Barrel || Core Length (ft) || Special Features
  13 KB (1,885 words) - 20:49, 19 January 2022
• Rate of penetration
  ...etration is calculated by measuring the length of time required to drill [[length::1 ft]] of depth. This is typically done by reading the chart on the geolog ...nk pen on the geolograph places a small mark on the chart. Every [[length::5 ft]] the pen places a larger mark on the chart ([[:file:rate-of-penetration
  7 KB (1,049 words) - 19:02, 20 January 2022
• Seal capacity of different rock types
  ...condary hydrocarbon migration and entrapment]: AAPG Bulletin, vol. 63, no. 5, p. 723–760.</ref> Wells and Amaefule<ref name=ch10r94>Wells, J., D., Ama * Most good sands can trap only [[length::50 ft]] or less of oil column.
  5 KB (760 words) - 20:55, 31 March 2022
• Sampling for paleontology
  ...cted for each joint of drill pipe added to the drill string (i.e., every [[length::30 ft]], or 9 m) and represents an amalgamated sample of the rocks penetra ...vals for each joint of drill pipe added to the drill string (i.e., every [[length::30 ft]], or 9 m). However, the geologist can specify a different interval
  7 KB (1,051 words) - 18:08, 24 January 2022
• Seismic data acquisition on land
  file:seismic-data-acquisition-on-land_fig5.png|{{figure number|5}}(a) Off end shooting. (b) Split spread shooting. ...me examples include dynamite in “shot holes” ranging in depth from 10 to [[length::300 ft]] (3 to 100 m) and primacord in trenches covered by a few inches of
  10 KB (1,389 words) - 16:20, 20 January 2022
• Rock quality
  ...carbonate and sandstone reservoirs: Amoco Production Company Report F76-G-5, 25 p. (unpublished).</ref> developed the following equation to calculate r ...cting-reservoir-system-quality-and-performance_fig9-20.png|{{figure number|5}}Hypothetical capillary pressure curves.
  10 KB (1,534 words) - 16:53, 4 April 2022
• Workovers
  ...[:file:workovers_fig1.png|Figure 1]]. The production casing is only 5 to [[length::9 in.]] in diameter, and it has been run into a corkscrew-shaped hole that ...asons just noted are generally completed to yield a profit in a reasonable length of time. Those done for the following reasons may have little profit incent
  12 KB (1,834 words) - 15:25, 24 January 2022
• Core-to-log transformations and porosity-permeability relationships
  ...[conglomerate|conglomeratic]] reservoir, where the clast size can exceed [[length::6 in.]] or more. Any attempt to determine an average porosity from convent ...3</sup> of material measured. When this is compared to a 1-in. core plug [[length::3 in.]] long, the log measures almost 400 times the volume measured by the
  14 KB (1,893 words) - 20:15, 2 February 2016
• Seismic inversion
  seismic-inversion_fig5.png|{{figure number|5}}The model-based inversion of the line through the river channel system of ...nsional data]]). Borehole B from [[:file:seismic-inversion_fig5.png|Figure 5]], which was the dry hole, is indicated by the faint white crosshairs at th
  8 KB (1,196 words) - 18:48, 21 January 2022
• Seismic data: building a stratigraphic model
  ...ismic_trace traces] for interpretation. The receiver spacing is usually [[length::10 ft]]. This gives actual [http://wiki.seg.org/wiki/Dictionary:Traveltime ...ery coarse velocity data can be obtained from a checkshot survey with only 5 or 6 traveltimes per well.
  5 KB (805 words) - 19:06, 27 January 2022
• Coal bed methane (UDip)
  ...cy|Henry Darcy]] in 1856 is comparable to the pressure difference per unit length. This relationship was derived from data obtained from several experiments :L = core length, cm
  10 KB (1,576 words) - 14:42, 2 April 2019
• Electrical methods
  ...materials to investigating resistivities down to depths as great as 1 to [[length::2 km]], although greater depths of investigation are possible with some te ...etic methods: Proceedings of the IEEE, v. 77, n. 2, p. 338–362., 10., 1109/5., 18630</ref> This primary EM field induces currents in subsurface conducto
  15 KB (2,130 words) - 21:19, 19 January 2022
• Facies map
  ...he gravity flows); 4 = deep-water deposits of the northern Adriatic Basin; 5 = condensed deposits of the Rosso Ammonitico Veronese (lower member). From file:sedimentary-basin-analysis_fig4-38.png|{{figure number|5}}Net sand distribution of shelf areas contoured parallel to the shelf edge
  15 KB (2,070 words) - 20:34, 7 July 2016
• Mudlogging: drill cuttings analysis
  ...eflect the various lithologies drilled over a 10-ft interval. The interval length can vary depending on the drilling rate and the detail needed for reservoir ...re typically washed through a 5-mm sieve. Particles greater than [[length::5 mm]] usually contain a high percentage of lost circulation material and cav
  10 KB (1,482 words) - 15:25, 24 January 2022
• Open hole tools
  | Gamma ray || [[length::2 ft]] || [[length::12 in]] || Well-to-well correlation and estimate ''V''_sh || Sen | Spectral gamma ray || [[length::3 ft]] || [[length::16 in]] || Well-to-well correlation and estimate ''V''_sh || Sen
  23 KB (3,350 words) - 17:26, 18 January 2022
• Offshore exploration and exploitation
  ...structures. This method generates seismic cubes according to the depth and length of the seismic line and the width of the hydrophones arrangement. ...s of platforms: 1, 2) conventional fixed platforms; 3) compliant tower; 4, 5) vertically moored tension leg and mini-tension leg platform; 6) spar; 7, 8
  5 KB (708 words) - 22:00, 10 April 2019
• Full waveform acoustic logging
  ...an at 20 kHZ; (2) the source-receiver spacing is longer, on the order of [[length::10 ft]] (3.05 m); and (3) the receiver is commonly an array consisting of ...ed and digitized, with the typical digitization interval being 5 μsec. The length of the time window recorded varies from 2 to 10 msec, depending on the sour
  10 KB (1,530 words) - 20:47, 19 January 2022
• Structural exploration: thrust belt example
  exploring-for-structural-traps_fig20-5.png|{{figure number|2}}Tectonic setting for the western U.S. relevant to La [[:file:exploring-for-structural-traps_fig20-5.png|Figure 2]] depicts the tectonic setting for the western U.S. relevant t
  14 KB (1,897 words) - 20:01, 3 February 2022
• Magnetic field: local variations
  ...sed by fault throws or basement highs unless basement is deep (> [[length::5 km]], approximately). In this case the slightly magnetic sedimentary rocks
  6 KB (946 words) - 19:56, 27 January 2022

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