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...depositional environment]] changes significantly, establish a different PI trend for each unique source rock type.

...mb|300px|{{figure number|1}}Magnetic profiles of total intensity, regional trend, and residual. After Nettleton.<ref name=ch14r7>Nettleton, L. L., 1962, Ele ...ig14-2.png|Figure 1]] shows magnetic profiles of total intensity, regional trend, and residual.

...evaluating-source-rocks_fig6-14.png|thumb|{{figure number|1}}Decreasing HI trend for a source rock beginning to generate hydrocarbons at a depth of approxim [[:file:evaluating-source-rocks_fig6-14.png|Figure 1]] shows a decreasing HI trend for a source rock beginning to generate hydrocarbons at a depth of approxim

Evaluating the maturation of a geologic section is based on a depth trend from samples in a well or basin. The level of maturity interpreted from mos ...on]] zones are greater for type III than for type II kerogen. Therefore, a trend is only valid if based on analysis of samples from a homogeneous organic se

...the north end of the Top Keuper horizon extending roughly parallel to the trend of the anticline. The Top Zechstein and Top Keuper are approximately confor ...seismic interpretation is that the survey is always oriented at 45° to the trend of faults, channels, and other features of interest. There will always be f

[[File:Economics_Fig-1.png|thumb|300px|{{figure number|1}}Crude oil prices trend since 1861]] [[File:Economics_Fig-2.png|thumb|300px|{{figure number|2}}Crude oil price trend between 1870 and 2005.]]

...basin bounded on the north by the Ozark uplift–Pascola arch–Nashville dome trend, on the southeast by the Appalachian fold belt, and on the southwest by the

...e is concentration of sulfur in oil plotted against API gravity, showing a trend of decreasing sulfur content with increasing gravity. Note that the Ekofisk ...icates the maturity trend in the figure is reflected in the sulfur-gravity trend, although some minor source-related differences are present in the sample s

...r, is toward destruction. Certain processes can temporarily interrupt this trend. These are “preserved” pore systems. Some of the processes that preserv

...quality-and-performance_fig9-50.png|300px|thumb|{{figure number|3}}General trend of increasing dissolved solids in subsurface fluids with increasing depth. ...ir-system-quality-and-performance_fig9-50.png|Figure 3]] shows the general trend of increasing dissolved solids in subsurface fluids with increasing depth.

...ing [[water saturation]] with increasing height. Well 1 is not on the same trend. Differences in water saturation attributable to differences in [[capillary

...se or decrease as the other, y, increases or decreases, in a straight-line trend or relationship.<ref name=Draper_etal_1966>Draper, N. R., and H. Smith, 196 ...e packages and is commonly used in computer generation of geological maps. Trend surface analysis, another mapping technique, is also based on the principle

...on|time-stratigraphic correlations]] that help in hydrocarbon prospect and trend delineation, regional stratigraphic and geologic studies, and exploitation

.... Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research c ...e, E. W. Chinn, and R. C. Lemoine, 1988, Origin of crude oil in the Wilcox Trend of Louisiana and Mississippi: evidence of long range migration: Gulf Coast

...mpletions map showing wells by year illustrates wells in the STACK (Sooner Trend Anadarko Canadian Kingfisher), SCOOP (South Central Oklahoma Oil Province),

The trend in sulfur content within a single megafamily of high-sulfur oils is a funct

...imated from [[Basic_open_hole_tools#Density|density logs]] or [[porosity]] trend.

.... Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research c

* Measure trend and plunge of lines

...tevilleShale2019-20CommRpt.jpg|Figure 3]]), demonstrating a rapid downward trend in well completion since 2015 ([[:file:Figure4FayettevilleShale2019-20CommR

...the Fayetteville Shale gas play (Figure 3), demonstrating a rapid downward trend in well completion since 2015 (Figure 4). Approximately 96 gas wells were p

...he true age of the accumulation. For example, by this approach Sho-Vel-Tum trend oil fields in southern Oklahoma accumulated from the Atokan (early Pennsylv

.... Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research c

* Determining structural trend continuation between wells and seismic data

...easing permits in East Texas, notably the Shelby Trough and Angelina River Trend (ART) is reflected in the higher production of Texas gas and condensate in

...eep-sea fan reservoirs, Shakelford and Preston waterflood units, Spraberry Trend, West Texas: The Univ. of Texas Bureau of Economic Geology Report of Invest

...~4,000 to over 14,000 ft (Fig. 2) across a roughly northwest to southeast trend. Eagle Ford oil is also widely produced in Texas and parts of Louisiana fro ...Information Administration GOR map shows a steady, northwest to southeast trend for thermal maturity progression from the oil window into condensate/wet ga

...(3) [[porosity]] ranges, (4) fluid content variation, (5) Poisson's ratio trend curves, and (6) a geological description of potential reservoir and encompa

...y series of these best shale values vs. depth. These define a normal shale trend (NST) line for each of the log curves to be used.<br>

...ds that have been devised to accomplish this, including weighting methods, trend projection methods, and statistical methods. The more common gridding metho ...ow the interpolation procedure to exceed the measured maximum and minimum. Trend projection methods use one of the search criteria previously described to s

...rst-order trend, modeling residuals between data and trend, and adding the trend and residual surfaces.]] ====Regional trend assist====

# Be guided by past experience in the basin or exploration trend.

...rmentrout II, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research c

.... Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research c

...t a depth of [[depth::7000 ft]], there is a 10% porosity difference in the trend lines.

...in the natural population of counterpart [[accumulation]]s in the subject trend, play, or basin. This requires the geologist or engineer to construct a fie ...larger than 200,000 bbl, which is the minimum economic field size in this trend for your firm. Therefore, the chance of ''commercial success'' is 0.75 &tim

...the seismic trace. Since the seismic trace lacks a low frequency velocity trend because of the band-limited wavelet, the inverted trace lacks the “excurs

Suppose you want to plot a distribution of field sizes from a basin or trend containing n number of fields. ...estment), then we can expect one out of five new field discoveries in that trend to have found a noncommercial field.

...Big Data, prominently in exploration it is used to extract the underlying trend of the seismic data and well data. The exploration stage requires deep know ..., H., Arslan, I., Zhai, X., Darabi, H., & Castineira, D. (2020). Finding a trend out of chaos, a machine learning approach for well spacing optimization. Pr

...il-and-oilsource-rock-correlations_fig8-40.png|Figure 1]] illustrates this trend. It shows the m/z 217.2 mass chromatograms of three oils from central Myanm

...(1) a more effective method for evaluating reservoir system continuity and trend directions and (2) improved methods for predicting reservoir system, source

...aries from 2 to 17 m (7 to 57 ft) thick. Discrete sandstone-rich axes that trend north-northeast with low to moderate sinuosity are interpreted as channel-p ...[[:File:Methods14ch08f11.jpg|Figure 11]]). Sand-body geometry in the axial trend is low sinuosity, and the bedding architecture is aggradational, as indicat

...e bow string rule, [[lateral]] ramps, or drawing the section normal to the trend of the regional compressional or extensional folds.<ref name=Woodward_etal_ ...n, a separatin surface can be projected along the fault retaining the same trend, but adjusted in value by an amount appropriate for the offset on the fault

| Ula Trend

...oduction. Source: http://tuscaloosatrend.blogspot.com/2017/05/austin-chalk-trend-field-production.html

...oil production of 5.8-154.0 t/d (Song et al., 2020). There is a observable trend of systematic increase in GOR from 13 to 385 m3/t with depth increase to ab

.... Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research c

Gas production from across the basin followed a similar trend, shown in Figure 3, following the same steady multiple year-on-year increas

.... Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research C

...related to depth, which range from ~4000 to more than 14,000 ft deep in a trend north to south across the play ([[:file:Figure1EagleFord2019-20CommRept.jpg

The tectonic setting and stratigraphic section are similar to the producing trend; therefore, the [[deformation]] features of the exposed structures can be u

...nted out that there is no theoretical justification for expecting a linear trend on semilog plots of ''k'' versus ϕ. In fact, the often-cited [[Wikipedia:K

...nde do Sul: Paula Coutiana, v. 1, p. 51–103</ref>. From this transgressive trend, glaciogenic strata are succeeded by the sedimentary strata of Guatá Group Passa Dois Group sedimentation developed following a final regressive trend on a large scale. Continental systems came to dominate the basin, represent

...plications, structural dip can then be defined by looking for a consistent trend on the arrow plot. The most repetitive dip should be the structural dip.

...n, represents anomalies. What successful company would drill on a regional trend as opposed to the top of a structure, on a bright spot, or at the crest of

...and B within the reservoir. The dashed line corresponds to the saturation trend of the well In part (b). Sharp changes in saturation correspond to elevatio

...an foredeep due to the thick sedimentary section. Orientations of features trend to the north and northwest in southern, western, and northwestern Iraq, int ...agros foldbelt ([[:file:M106Ch12Fig06.jpg|Figure 6]]). Structural features trend to the northwest in the Mesopotamian foredeep, parallel to the Zagros foldb

...ithin a few feet of the shales, the shales continue on a normal compaction trend. However, if no sandy beds are present, the water remains in the shale pore

...e scale determine the in-place hydrocarbon volume, areal distribution, and trend of hydrocarbon production.

...s the turn-around point from an overall deepening to an overall shallowing trend. Associated with this horizon may be a major condensed section, marked by t

...pages.com/data/bulletns/1994-96/data/pg/0078/0005/0700/0700.htm Structural trend analysis by axial surface mapping]: AAPG Bulletin, vol. 78, p. 700–721.

...ure 6]]; Beydoun et al.<ref name=Beydounetal_1994 />). Inception, age, and trend are analogous to the petroliferous Euphrates graben system of eastern Syria

...shale-gas production in the Appalachian Basin and the Marcellus Shale play trend. Map includes present boundaries and names of states, U.S.A. WI = Wisconsin ...llel to the basin and related to the Rome trough and (2) those faults that trend perpendicular to the strike of the basin and are interpreted as transform f

* Nonproductive zones tend to have a ratio trend where subsequent values are lower than preceding values.

...ion requires detailed knowledge of the strike direction. If the structural trend is variable so that the cross section is not everywhere perpendicular to st

...as both [[seal]] and principal [[source rock]] to the Brae Play. The Brae trend itself comprises a series of relatively small point-sourced, [[synrift]] sl

...layers and laminae are much more continuous along the depositional strike trend of the dune system, perpendicular to the wind flow direction ([[:file:M91FG

The % Roe data from Tmax suggest a consistent trend over the 240 ft (73 m) interval reported. The Tmax increases from about 435 ===Eagle Ford Shale, Austin Chalk Trend, Texas===

...|4}}Simplified geological map of the Adana Neogene Basin. Misis structural trend divides the basin into two parts: Adana and İskenderun subbasins (redrawn .... Other Devonian and Early Carboniferous sediments show a similar maturity trend as Early Devonian sediments.

...ch is linked to the preservation of the precuyanodepocentre east of a high Trend in the area of Loma Chica and Punta Rosada, generated by [[tectonic inversi

...hat probably follow deeper crustal features along the Tornquist structural trend ([[:file:M115CH02FG03.jpg|Figure 3]]).

...t almost every well drilled into the Spraberry (Spraberry North, Spraberry Trend, and Dean) over several counties was productive. ...t the oil and gas industry. Production followed a similar, now recognized, trend of high initial rates and rapid declines. Secondary, waterflood recovery ef

...ws a good straight-line relationship, the curve can be used to predict the trend of a cumulative gas or cumulative oil plot to estimate ultimate recovery.

...one bodies. Narrower north–south lineaments are perpendicular to this main trend. The depositional environment is interpreted as a wave-dominated delta syst

...<ref>Xie, Y., A. S. Cullick, and C. V. Deutsch, 2001, Surface geometry and trend modeling for integration of stratigraphic data in reservoir models: SPE Pap ...d mouth-bar clinothems (sensu Bhattacharya<ref name=Bhttchry2006 />), or a trend in these parameters, can be extracted ([[:File:BLTN13190fig6.jpg|Figure 6B,

...n from tight reservoirs and lately from shale gas and oil were added, this trend started to change in a reverse and positive direction. Up to date, a total

...uvial system and produces from a fourth point bar sand body along the same trend. Nevertheless, the Sweetwater field is isolated from the Little Creek field

...se in argillaceous content. Upward fining log patterns exhibit the reverse trend. Blocky or cylindrical log patterns exhibit relatively little vertical vari

...s a result of fluvial lineaments converging at a high angle to a shoreline trend (see [[:file:M91Ch11FG71.JPG|Figure 3]]). The lobate shape of the delta fro

...s a typical vertical sequence, which normally displays a coarsening-upward trend. The lowermost units consist of lacustrine deposits. Quite often these lowe

...ation of this population average HI_o is given by the slope of a trend line established by a plot of TOCo versus the present-day generation potent ...sin, British Columbia || Arkoma Basin, Oklahoma || Eagle Ford-Austin Chalk trend, Texas || St. Lawrence Lowland, Quebec || Western Canada Sedimentary Basin,

...epositional environments and geologic history of Golden Lane and Poza Rica trend, Mexico, an alternative view]: AAPG Bulletin, v. 56, no. 8, p. 1419–1447.

...century, a streamer was typically 3500–4000 m (11,500–13,000 ft) long. The trend today is for increasingly longer cables to allow a greater distance between

...ons (i.e. reactive transport modelling) is also one of the latest research trend for carbonate sedimentologists.

...as sandy shelf, bar margin, and central bar. The marine bars in the Terry trend northwest-southeast. Bars are 2–4 miles wide and 8–16 miles long. The n

...long the Neo-Tethys Ocean, which started to open with a time-transgressive trend beginning in Carboniferous time.<ref name=Albelushietal_1996 /> <ref name=G

...ff in 2011, with the potential to totally reverse the declining production trend observed in Argentina since 2002.

...s. The arsenic concentrations tend to follow the same northeast- southwest trend as the Benue Trough. High concentration of arsenic in this area is attribut