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• Types of wells
  ...A horizontal well will be geosteered through a target zone by assuming the bed dip. If the assumed dip is wrong, the well may exit the target zone. Proble ...This can give enough warning to allow the well to be steered away from the bed boundary.
  22 KB (3,567 words) - 17:20, 11 March 2019
• Factors that oppose hydrocarbon migration
  ...ase is generally assumed to form one or more continuous networks through a bed when its concentration exceeds between 4.5% and 17% of the pore volume.
  8 KB (1,133 words) - 15:16, 14 February 2022
• Geological heterogeneities
  ...ing of structure, [[fluid contacts]], [[porosity]], bed thickness, lateral bed continuity, and various other attributes of reservoirs using three-dimensio
  17 KB (2,232 words) - 21:22, 19 January 2022
• Reservoir
  ...iver.jpg|300px|right|thumbnail|{{figure number|4|}}Change in grain size of bed load in Mississippi River from Cairo, Illinois, to the mouth. (Form U.S. Ar
  14 KB (2,134 words) - 16:48, 26 March 2019
• Depositional environments
  ...y gravel-sized sediments and show down-fan decreased in [[grain size]] and bed thickness and an increase in sediment sorting. The characteristics of debri ...nment. The basal zone is the area where erosion and plucking of underlying bed happens. The supraglacial zone and ice-contact zone are zones of melting wh
  26 KB (3,851 words) - 20:38, 28 February 2019
• Making regional tectonic maps
  ...illustrating three possible hydrocarbon migration pathways and related sea-bed features. Based on data from Lovely and Ruggiero.<ref name=Lovely&RuggieroP
  8 KB (1,069 words) - 20:03, 18 February 2022
• Well types
  ...A horizontal well will be geosteered through a target zone by assuming the bed [[dip]]. If the assumed dip is wrong, the well may exit the target zone. Pr ...This can give enough warning to allow the well to be steered away from the bed boundary.
  24 KB (3,753 words) - 19:33, 3 March 2016
• Migration by separate phase
  ...roat network. At that time, the slug moves into the closest coarse-grained bed. Expulsion is preferentially upward because of the hydrocarbons' buoyancy,
  8 KB (1,155 words) - 15:17, 14 February 2022
• Balanced cross sections
  ...., Jr., 1990, Unique determination of normal fault shape from hanging-wall bed geometry in detached half grabens: Ecologae Geologicae Helvetiae, vol. 83,
  8 KB (1,060 words) - 15:07, 3 February 2022
• Basin-centered gas systems: elements and processes
  ...The source rocks for direct BCGSs are most commonly [[humic]]-type [[coal bed]]s and [[carbonaceous]] [[shale]], such as occur in [[Cretaceous]] rocks in ...water- and gas-bearing zones; however, vertical transitional zones across bed boundaries do not occur, and there is an abrupt, distinct boundary between
  20 KB (2,949 words) - 18:24, 6 April 2016
• FWhitehurst sandbox
  * ash bed Wikibooks:Historical_Geology/Volcanic_ash
  22 KB (3,024 words) - 21:42, 19 December 2014
• Mudstone nomenclature
  ...aterial is delivered to a basin by a variety of transport processes (e.g., bed load, suspension) and is subsequently modified by postdepositional processe ...172 p.</ref><ref>Plint, A. G., J. H. S. Macquaker, and B. L. Varban, 2012, Bed-load transport of mud across a wide, storm-influenced ramp: Cenomanian-Turo
  58 KB (8,391 words) - 19:46, 20 February 2024
• Mudlogging: drill cuttings analysis
  ...nce of a specific lithology reflects the highest possible position of that bed. However, because the borehole may tend to cave or slough during drilling,
  10 KB (1,482 words) - 15:25, 24 January 2022
• East Breaks hydrocarbon migration model
  ...strating three possible hydrocarbon [[migration pathway]]s and related sea-bed features. They concluded that the [[primary migration]] pathway involves mi
  10 KB (1,376 words) - 16:00, 23 March 2022
• Sandstone
  ...sutured grain. Chemical compaction decrease the porosity and increase the bed thinning. Deep burial cause decrease the sand porosity dramatically.
  10 KB (1,508 words) - 15:44, 22 March 2019
• Growth strata
  ...re 5, left]] shows a narrowing upward fold limb, or growth triangle, where bed dips within the fold limb generally do not shallow upward, consistent with
  13 KB (1,930 words) - 22:28, 20 January 2016
• Quick-look lithology from logs
  ...ot significant, it will shift if formation fluid salinity changes from one bed to another, making the log hard to interpret. ...liper reading that is about [[length::0.5 in.]] smaller than the bit size. Bed boundaries are often accurately delimited ([[:file:quick-look-lithology-fro
  25 KB (3,637 words) - 19:39, 18 January 2022
• Depth and thickness conversion
  In this equation, δ′ indicates the apparent [[dip]] of the bed in the direction of the horizontal displacement ([[:file:conversion-of-well
  17 KB (2,363 words) - 16:49, 20 January 2022
• Preprocessing of logging data
  ...ue resistivity from a dual induction log. It should be noted that shoulder bed effect corrections are difficult and require complex algorithms.<ref name=p
  13 KB (2,094 words) - 17:42, 18 January 2022
• Delta plain, upper
  ...t commonly the distorted bedding simply caps the sand unit, but the entire bed can be rendered into a fluid state and massive contortions can be present ( ...e]], [[coal]], and iron-rich seams which form within these essentially red bed deposits. The sand body itself normally displays a graded base; however, in
  33 KB (4,905 words) - 16:40, 6 April 2016
• Braided fluvial reservoirs
  ...voir heterogeneity and reserve growth opportunities in a continental-scale bed-load fluvial system: Hutton sandstone, Jackson field, Australia]: AAPG Bull
  13 KB (1,859 words) - 21:29, 12 March 2019
• Drilling a well
  ...ng system technology or in response to signals from transducers on the sea bed. Signals are sent to propellers and [[lateral]] thrusters on the sides of t
  15 KB (2,385 words) - 15:05, 1 August 2016
• Fluid contacts
  ...ent free water surface and oil-water contact. The displacement pressure of bed A causes the contact elevation difference between contacts 1 and 2. The dis
  19 KB (2,690 words) - 21:20, 19 January 2022
• Pressure detection
  As long as there is a silty or sandy bed within a few feet of the shales, the shales continue on a normal compaction
  16 KB (2,450 words) - 21:42, 20 January 2022
• Reservoir modeling for simulation purposes
  Fluid flow in a reservoir is controlled by bed continuity, the presence of baffles to flow, and the [[permeability]] distr
  17 KB (2,234 words) - 21:21, 19 January 2022
• Lithofacies and environmental analysis of clastic depositional systems
  ...ave a depositionally flat datum (such as a [[bentonite]] bed, marine shale bed, or laterally persistent [[limestone]]). Sections should be oriented parall
  38 KB (5,198 words) - 22:11, 15 January 2024
• Marcellus Shale (Devonian) -- Appalachian Basin
  ...the Marcellus Shale in Maryland: Conventional Appalachian deep gas source bed and unconventional gas reservoir: Maryland Geological Survey, http://www.mg
  19 KB (2,773 words) - 21:36, 4 March 2022
• Structural restoration
  ...ef> As a defined term, balancing initially referred to the conservation of bed lengths and thicknesses.‎<ref name=Dahlstrom />
  17 KB (2,335 words) - 17:14, 13 October 2022
• Cross section
  ...riations are strongly exaggerated in such a section. The apparent dip of a bed in a vertically exaggerated cross section is related to true dip by the fol
  20 KB (3,029 words) - 16:09, 24 January 2022
• Eolian reservoirs
  ...an De Chelly Sandstone in northern Arizona. The average thickness of cross-bed sets is about 6 m (20 ft). The width-to-thickness ratio is estimated as bet
  19 KB (2,690 words) - 18:42, 1 August 2016
• Mudstones
  ...ically all pelagic material is transported as near-bottom suspension or in bed load as aggregates, floccules, or pellets comprising individual clay- and s
  16 KB (2,352 words) - 18:46, 4 December 2023
• Open hole tools
  ...ogy) || 1 ft || -- || Estimate porosity and identify presence of gas, thin bed evaluation, shalt sand evaluation || Needs environmental corrections; sensi
  23 KB (3,350 words) - 17:26, 18 January 2022
• Risk: expected value and chance of success
  ...formed by stratigraphic contrasts or sealing faults). Fluid [[viscosity]], bed thickness, differential [[permeability]], and fault history all influence t
  22 KB (3,173 words) - 19:27, 19 January 2022
• Standard interpretation
  ...likely overestimated due to the proximity of the massive conductive shale bed. Zone B was found to be a light oil sand with 24% porosity and 17% water sa
  25 KB (3,776 words) - 19:53, 18 January 2022
• Geology workstation
  ...s. In some projects, surface geology is of great importance, consisting of bed attitudes and surface expression of contacts and faults. Seismic data can b
  19 KB (2,872 words) - 14:28, 20 January 2022
• Data: sources
  ...r and about 2.5–5 cm (1–2 in.) long. The plugs are cut horizontally (i.e., bed parallel) at a frequency of three to four samples per meter or every foot f * nature of bed contacts
  43 KB (6,686 words) - 13:44, 18 March 2019
• Faults: structural geology
  ...int from a shale bed acting as the source for the clay smear and the shale bed thickness<ref name=Bouvieretal_1989>Bouvier, J. D., C. H. Kaars-Sijpesteijn The shale smear factor (SSF) is dependent on the shale bed thickness and the fault throw but not on the smear distance (Lindsay et al.
  63 KB (9,496 words) - 16:51, 15 January 2024
• Wattenberg field
  ...p and base of the Niobrara. The upper unconformity removes the upper chalk bed in some areas of the Wattenberg Field. The B and C chalks are the main focu ...|{{Figure number|26}}Structure contour of Terry Sandstone marker bentonite bed. Contour interval 100 ft. Map shows Terry (green dots), Hygiene (red dots),
  72 KB (10,249 words) - 20:06, 15 January 2024
• Barmer basin
  ...atigraphic terminology used including the main [[source rock]]s, [[carrier bed]]s, and generalized [[fluid migration|migration]] pathways.]]
  24 KB (3,528 words) - 22:50, 8 January 2019
• Sandstone sedimentology and stratigraphy
  ...ked by wave action in shallow area resulting into potential reservoir sand bed for example Ordovician oil- bearing glacial sands found in Algeria and Perm
  27 KB (3,802 words) - 19:32, 9 January 2024
• West Texas Super Basin
  ...per 515, p. 21–60.</ref> isopach interpretation of the Permian Ochoan (red bed) sequence. C.I. = 1000’ (C.I. = 100’ where <1000’ north of the Matado Gulf Oil switched their leasing strategy to the red bed isopach thins and held the acreage shown in [[:file:M125-WestTexas-Figure3.
  157 KB (23,278 words) - 18:36, 16 January 2024
• Appalachian Basin Marcellus gas play
  ...1980-81/data/pg/0064/0008/1150/1179.htm Anoxic environments and oil source bed genesis]: AAPG Bulletin, v. 64, p. 1179–1209.</ref> This preservation mod ...nnual Convention and Exhibition.</ref> investigated the Marcellus Shale at bed-scale levels and found a variety of sedimentary structures inconsistent wit
  89 KB (13,415 words) - 19:16, 16 January 2024
• Basin-centered gas systems: evaluation and exploration strategies
  ...ks is critical. For example, the identification of humic, gas-prone [[coal bed]]s is the most obvious source rock for direct BCGAs; in nearly every countr
  34 KB (5,070 words) - 15:11, 23 August 2016
• Three-dimensional modeling of clinoforms in shallow-marine reservoirs
  ...e of permeability contrasts between facies associations, and the impact of bed-scale heterogeneity on vertical permeability, as well as reservoir engineer ...erved at outcrop ([[:File:BLTN13190fig6.jpg|Figure 6C]]). Heterogeneity at bed scale is recognized to be present but is not explicitly captured by surface
  113 KB (16,689 words) - 22:11, 15 January 2024
• Great American carbonate bank, biostratigraphy
  ..., and J. W. Delano, 2004, Discovery of the Ordovician Millbrig K-bentonite Bed in the Trenton Group of New York State: Implications for regional correlati
  58 KB (8,121 words) - 16:35, 1 August 2016
• Delta plain, subaqueous
  ...associated turbulent diffusion; (b) friction between the effluent and the bed just seaward of the mouth; and (c) buoyancy resulting from density contrast
  60 KB (9,022 words) - 17:17, 21 March 2016
• Vaca Muerta play
  ...th the present-day maximum horizontal stress (east–west), and the numerous bed-parallel veins (aka beefs) may be easily reactivated by the hydraulic fract
  77 KB (11,201 words) - 20:07, 15 January 2024

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