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• Total organic carbon (TOC)
  ==Average TOCs== The table below<ref name=ch06r3 /> shows average TOC values for different sedimentary rock types.
  3 KB (428 words) - 16:33, 13 April 2022
• AAPG Wiki:Personas
  * Average age of employees in the industry is 50-52. ** The average age of the geophysical department in Houston is 58 years.
  1 KB (225 words) - 13:31, 6 August 2013
• Geostatic and lithostatic pressure
  * ρ_m = weighted average of grain (mineral) density (sandstone and shale = 2.65 g/cm³, li * ρ_w = weighted average of pore-water density (g/cm³)
  3 KB (402 words) - 14:47, 16 February 2022
• Seismic data and mapping structure
  ...ssic || Mapping a surface of interest (from data) using [[Average velocity|average velocities]]
  2 KB (320 words) - 19:10, 27 January 2022
• Natural-gas liquids
  ...ield to petroleum field and from country to country, and the overall world average can only be calculated based on reliable statistics for gas and NGL, statis
  4 KB (549 words) - 16:31, 25 June 2015
• Static gas pressure gradient estimation
  ...ormation-fluid-pressure-and-its-application_fig5-11.png|{{figure number|4}}Average gas chart. Copyright: Gearhart-Owens.<ref name=G-O>Gearhart-Owens Industrie ...tion or formation temperature are available, estimate gas density from the average gas chart ([[:file:formation-fluid-pressure-and-its-application_fig5-11.png
  7 KB (979 words) - 15:24, 17 February 2022
• Geothermal gradient
  ...culating groundwater, and the cooling effect of drilling fluids. Worldwide average geothermal gradients are from 24 to 41&deg;C/km (1.3-2.2&deg;F/100 ft), wit
  901 bytes (127 words) - 19:53, 25 June 2015
• Magnetotellurics
  ...is a function of both frequency at which the measurement is taken and the average resistivity of the subsurface || Depth of investigation is the depth of the | Respond only to changes in average bulk resistivity || Respond to individual rock layers along the wall of the
  3 KB (486 words) - 17:53, 25 January 2022
• Rock quality
  ...w unit 2 is a macroporous, oolitic [[limestone]]. Its average Φ is 10% and average K_a is 10 md. ...found the best correlation to be r₃₅ because that is where the average modal pore aperture occurs and where the pore network is developed to the p
  10 KB (1,534 words) - 16:53, 4 April 2022
• Hydrostatic pressure-depth plot construction
  The formation fluid pressure at any depth in a well is a function of the average formation water density (ave. ρ_w) above that depth, not the den ...pressure is not available for a well, find out the accepted rule-of-thumb average hydrostatic pressure gradient for the depth of the zone of interest where t
  7 KB (895 words) - 18:57, 16 February 2022
• New Albany Shale, Illinois Basin, southwestern Indiana
  ...ed to banded shales with interbedded greenish-gray bioturbated shales. The average total organic carbon content is 6−7 wt. %, ranging from < 1 to 20 wt. %. ...e initial potential of the NAS gas wells ranged from 567 to 11,327 m3/day (average 5295 m3/day), but the initial production to the pipeline is significantly l
  7 KB (1,107 words) - 21:50, 4 March 2022
• Tight gas reservoirs: evaluation
  ...|{{figure number|3}}Histograms showing (a) average porosity values and (b) average permeability values for cored tight gas reservoir facies. (From Moslow and ...values of porosity and permeability are acceptable and expected. While the average air permeability values rarely exceed 1.0 md (millidarcy) for tight gas res
  11 KB (1,444 words) - 21:26, 4 January 2024
• Economics: fundamental equations for oil and gas property evaluation
  ...ures will result in successes and some will result in failures, but on the average, we expect to make the expected net present value.
  6 KB (842 words) - 19:26, 19 January 2022
• AAPG Wiki:Project timeline
  ...es, so each chapter will become some number of wiki articles, perhaps 3 on average. So we anticipate that the manual will result in about 400 articles. In the
  2 KB (333 words) - 18:09, 15 July 2013
• Barnett shale play
  ...eraged 4,920 MMCF/day. The field also produced oil and condensate at an average rate of 3,207 and 15,757 bbls/day respectively in 2014. Latest production
  6 KB (909 words) - 19:24, 14 March 2019
• Statistics overview
  ...a population and that the average sample value approximates the population average. This is only possible if both high and low values are sampled without bias There are three measures of characterizing a population by describing the average value, or its central tendency. The most familiar measure is the ''arithmet
  16 KB (2,483 words) - 19:28, 19 January 2022
• Seismic data - creating an integrated structure map
  ....png|{{figure number|2}}Hypothetical well with important reference points; average velocity map for the Wilcox Formation in the Glenn Pool survey. From Liner. ...2]] shows a hypothetical well with important reference points as well the average velocity map for the Wilcox Formation in the Glenn Pool survey. This map ha
  7 KB (1,117 words) - 17:51, 25 January 2022
• Sandstone diagenetic processes
  ...ption#Maturity|sorting]], quartz content, and burial depth probably has an average porosity of approximately 13%.
  7 KB (870 words) - 20:30, 5 April 2022
• Reservoir simulation study
  ...l capillary pressure and relative permeability curves for each grid block, average curves can be derived for several ranges of porosity and permeability value ...lculated for series flow (geometric average) and parallel flow (arithmetic average). © Lishman,<ref name=Lishman>Lishman, J. R., 1970, Core permeability anis
  19 KB (2,711 words) - 17:48, 21 January 2022
• Vibro-sesismic to increasing the production rate of coal bed methane
  ...is 0.15%-0.57%. and after vibration can reacht decrease Sor untul 68% with average 66.1 %. From the result above, there is the same result beetwen sysntesis c
  11 KB (1,551 words) - 16:49, 11 January 2016
• Seismic data - mapping with two-dimensional data
  ...uction requires a base map and velocity data. The object is to contour the average velocity down to an event. ...ver, they generally approximate the root mean square velocities from which average velocities can be calculated.
  13 KB (1,936 words) - 21:29, 21 January 2022
• Eagle Ford Group in southwest Texas (USGS)
  [[file:Figure3EagleFord2019-20CommRept.jpg|300px|thumb|{{figure number|3}}Average monthly daily production rates for crude oil from the Eagle Ford (U.S. EIA, ...strata brittle and amenable to fracture propagation. Completed wells show average initial production rates (first full month) of ~600 bbls/day for oil and 20
  11 KB (1,594 words) - 19:15, 8 February 2024
• Reservoir modeling for simulation purposes
  ...presented and that the individual layers and bodies can be described using average petrophysical properties that lead to realistic flow simulations. For this ...age. The more random the permeability, the closer it gets to the geometric average. Geostatistical methods have become popular to tackle these problems.<ref n
  17 KB (2,234 words) - 21:21, 19 January 2022
• Electrical methods
  ..., occur over such limited formation thicknesses that their effects on bulk average resistivity is, in most cases, undetectable. ...ous sedimentary formations in most instances has little effect on the bulk average resistivity since the additional fracture [[porosity]] changes the already
  15 KB (2,130 words) - 21:19, 19 January 2022
• Pore throat size and connectivity
  ...pore size presents problems. For example, how do we accurately measure and average pore size in rocks with poorly sorted pore sizes?
  4 KB (650 words) - 14:23, 4 April 2022
• Magnetics: total intensity and residual magnetic maps
  ...th's normal magnetic field is removed. It is generally a reflection of the average magnetic susceptibility of broad, large-scale geologic features.
  4 KB (618 words) - 19:55, 27 January 2022
• Main Central Thrust
  ...value of -21.5 has been reported in the Lesser Himalayan Sequence while an average [[Nd]] value of -16 has been reported in the Greater Himalayan Sequence) ma
  10 KB (1,434 words) - 15:39, 20 January 2016
• Hydroelectric power
  ...ct that most technically attractive sites have already been developed. The average large dam today is about 35 years old.
  10 KB (1,466 words) - 16:06, 11 January 2016
• Displacement pressure: theory vs. reality
  ...ional systems]].) Measured displacement pressures of the top seal have an average range of 150–200 psi (air-mercury) and can seal 10.86–12.64 m of oil. T
  4 KB (587 words) - 13:36, 1 April 2022
• Density-neutron log porosity
  Use the lithology matrix densities to determine porosity and average P_e to determine lithology listed in the table below. ! Lithology || Density, g/cc || Average pe
  12 KB (1,763 words) - 16:18, 5 April 2022
• China Shale Gas & Liquids - Bohai Bay Basin
  ...is in overall good-very good source rock containing Type I-II kerogen, in average of 3.6% TOC, and at the oil-mature stage with 0.68% to 1.16% Ro (Zhao et al ...cteristic of high sulphur content (~2.3%), high resins and asphaltenes (in average 39.7% and 11.2%, respectively), and therefore, high density and viscosity (
  8 KB (1,251 words) - 15:51, 14 March 2022
• Parasequences (fourth- and fifth-order sequences)
  ...ort duration—generally less than 10,000 years. Periodic parasequences have average durations of 100,000 years.
  5 KB (619 words) - 22:26, 3 February 2022
• Pressure transient testing
  * [[Permeability]] to the produced phase (oil, gas, or water), which is an average value within the radius of investigation achieved in the test * Current average pressure in the drainage area of the tested well
  15 KB (2,314 words) - 17:45, 21 January 2022
• Formation water density
  #*::: T_s = average surface temperature (°F)
  5 KB (714 words) - 15:19, 13 September 2022
• Hydrocarbon accumulation: the seven critical elements
  * Average [[Wikipedia:Fault_(geology)#Slip.2C_heave.2C_throw|throw]] on faults
  5 KB (636 words) - 21:47, 1 February 2022
• History of oil
  ...1972 million bbl per year in 1950 to 3522 million bbl per year in 1971, an average growth of almost 74 million bbl annually. It decreased until the initiation
  5 KB (778 words) - 21:14, 12 March 2019
• Niobrara & Codell of the Denver-Julesburg Basin
  ...canceled. Compared to an average rig count of 26 during 2019, 2020 saw an average rig count of 9 throughout the year, four of which were focused on the Niobr
  9 KB (1,412 words) - 21:46, 3 March 2022
• Dipmeter
  ...tion of the contact exposed is liable to be highly unrepresentative of the average structural dip. Outcrop perspectives cannot be extrapolated to the borehole ..., shale laminations tend to be parallel to one another and parallel to the average of most lithological bed boundaries. In dipmeter computations, there are a
  14 KB (2,128 words) - 17:25, 18 January 2022
• Haynesville and Bossier Shales (Upper Jurassic), East Texas and Northwest Louisiana
  ...t” related to higher percent weight of total organic content (TOC), higher average total porosity and higher original gas in place (OGIP; Fig. 4); however, in
  4 KB (628 words) - 23:05, 3 March 2022
• Fracture analysis
  ...pages.com/data/bulletns/1994-96/data/pg/0080/0010/1550/1565.htm Estimating average fracture spacing in subsurface rock]: AAPG Bulletin, vol. 80, p. 1565–158
  5 KB (644 words) - 15:30, 3 February 2022
• Top seal strain estimation
  ...calculations of stain may be warranted. Incremental strain analysis is an average of strain over the entire structure. Local areas of high strain can have im
  5 KB (757 words) - 15:43, 30 March 2022
• Eagle Ford Group, southwest Texas
  ...strata brittle and amenable to fracture propagation. Completed wells show average initial production rates (first full month) of ~600 barrels (bbl) per day f ...Ford drilling to be profitable, with values ranging from $26 to 63 with an average of $44 (Geman, 2021). The report noted that while the oil price as of summe
  10 KB (1,550 words) - 21:50, 3 March 2022
• Borehole gravity tool
  .... The wireline must stop at each individual station, and the tool takes an average of 5–15 min per station for a reading. This means a typical borehole grav
  5 KB (720 words) - 18:07, 24 January 2022
• Geothermal energy
  ...ental%20shield continental shields], which are characterized by lower-than-average geothermal gradient. ...to the surface. It is read in joules per second. It is estimated that the average is 42 x 1012 J/sec and has two different sources (See [[:File:Figure 1.png|
  13 KB (1,918 words) - 18:12, 2 April 2019
• Spontaneous potential logs in water resistivity calculation
  * T_s = average surface temperature
  6 KB (1,027 words) - 16:40, 5 April 2022
• Measuring displacement pressure using mercury injection
  ...uired to create a continuous hydrocarbon filament range from 5–17% with an average of 10%.<ref name=ch10r67 />
  5 KB (749 words) - 19:46, 31 March 2022
• Permeability
  ...rithmetic average. Comparison of core permeabilities shows that arithmetic average permeabilities values generally agree with well test permeabilities.
  19 KB (2,716 words) - 19:02, 20 January 2022
• Using and improving surface models built by computer
  ...polated values for a weighted average algorithm tend to “come back” to the average of near data values. (b) Acceptable surface extrapolation achieved by creat ...appropriate for. A general rule of thumb is that least squares or weighted average algorithms work best when modeling gently undulating horizontal surfaces. A
  40 KB (6,039 words) - 20:49, 19 January 2022
• Morphometric and particle analysis
  ...:applied-paleontology_fig17-33.png|Figure 1]] shows changes vs. age in the average morphometrically defined shape of tests in populations of the planktonic fo
  5 KB (718 words) - 20:59, 31 January 2022
• Magnetic field: local variations
  ...ment blocks of different lithologies and magnetic susceptibilities. If the average magnetic susceptibilities (''k''₁ and ''k''₂) of the
  6 KB (946 words) - 19:56, 27 January 2022

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