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| frompg = 5-6 | topg = 5-6

| frompg = 5-27 | topg = 5-28

| frompg = 5-1 | topg = 5-64

...in.]] to [[length::100 ft]] (1:600) and [[length::5 in.]] to [[length::100 ft]] (1:240). This track also includes the location (depth or interval) of the ===Tracks 4 and 5: hydrocarbon evaluation===

...ion is necessary if the zone SP is measured from is less than [[length::20 ft]] thick.) # Read the maximum SP response in a zone at least [[length::20 ft]] thick.

[[file:using-magnetics-in-petroleum-exploration_fig14-5.png|300px|thumb|{{figure number|1}}Geologic map of an area of crystalline [ ...bility. As shown in [[:file:using-magnetics-in-petroleum-exploration_fig14-5.png|Figure 1]], the basement is of complex lithology and is highly fracture

...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.

| frompg = 5-21 | topg = 5-25

...xperimental study of secondary oil migration]: AAPG Bulletin, vol. 76, no. 5, p. 638–650.</ref> These experiments at best have column heights 19–23% ...ld in the Tar Springs Formation reservoir is [[length::29 m]] [[depth::(95 ft]]).

* If the bed was too thin for the SP to develop fully (beds thinner than 20 ft), the appropriate correction is applied from the charts. | 1-5

...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

...but too tight to produce. Between these are [[length::30 ft]] [[depth::(8.5 m]]) of mesoto macroporous sandstone (flow units 1-4). Subsea elevation of –1,030 ft (–314 m) is marked in the depth track.

...::1.5 ft]] for short radius horizontal wells to greater than [[length::400 ft]] for vertical holes. ! Inner Barrel || Core Length (ft) || Special Features

...ch 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 penetrated in ...ch 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 if nece

...gamma-gamma density log. The broader difference anomaly observed over the length of the interval is explained by the influence of the entire reef complex. ...after hydrofracturing the reservoir. In Case #4 the missed pay is about [[length::1 m]] from the well, and the density difference is very pronounced. Such p

| frompg = 5-1 | topg = 5-64

file:seismic-data-acquisition-on-land_fig5.png|{{figure number|5}}(a) Off end shooting. (b) Split spread shooting. ...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 soil. H

| Spontaneous potential (SP) || 6–10 ft || N/A || Well-to-well correlation, estimate ''R''_w , and indica | Gamma ray || [[length::2 ft]] || [[length::12 in]] || Well-to-well correlation and estimate ''V''_sh || Sen

...s 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 geolograph. ...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_fi

wellbore-trajectory_fig5.png|{{figure number|5}}Kicking off with a jet bit.]] ...tom in the desired trajectory ([[:file:wellbore-trajectory_fig5.png|Figure 5]]). Weight is applied to the bit while it is rotated into the pocket. This

...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.

| D || Vertical depth || ft | V_bpf || Volume || bbl/ft

...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

...arlougher, R. C., 1977, Advances in well test analysis: SPE Monograph Vol. 5, Society of Petroleum Engineers, New York, p. 90–103.</ref><ref name=pt03 ===Length of test interval===

...uses the fracture to extend from the wellbore, and this growth in fracture length is accompanied by an increase in fracture width at the wellbore and proport [[file:stimulation_fig5.png|300px|thumb|{{figure number|5}}Proppant is introduced to fracture.]]

...traces] for interpretation. The receiver spacing is usually [[length::10 ft]]. This gives actual [http://wiki.seg.org/wiki/Dictionary:Traveltime travel ...ery coarse velocity data can be obtained from a checkshot survey with only 5 or 6 traveltimes per well.

* ''C'' = pressure gradient constant (0.433 psi/ft or 0.1 kg/cm²/m) ...oil contacts are at elevations of [[length::-5020 ft]] and [[length::-5080 ft]], respectively.

File:Sedimentary-basin-analysis fig4-43.png|{{figure number|5}}North-South seismic section through the East Breaks 160-161 field. ...is_fig4-42.png|Figures 4]], [[:file:sedimentary-basin-analysis_fig4-43.png|5]], and [[:file:sedimentary-basin-analysis_fig4-44.png|2]]). The 160-1 elect

...ks: The University of Texas at Austin, Bureau of Economic Geology Handbook 5, 43 p.</ref> and Boyles et al.<ref name=pt05r28>Boyles, J. M., A. J. Scott, ...gh. Usually a scale of [[length::1 in]] = [[length::5 ft]] or [[length::10 ft]] is appropriate.

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

...[: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

...roduce from the ''Glob alt'' sandstones and the ''Glob alt'' sandstone 200-ft (60-m) isopach. file:sedimentary-basin-analysis_fig4-56.png|{{figure number|5}}North–south seismic section showing the hypothetical model for migration

...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

...Z; (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 four to ...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

...of keeping it substantially within the reservoir target until the desired length of horizontal penetration is reached ([[:File:M91Figure161.JPG|Figure 1]]). At very high angles, if the top reservoir is 15 m (49 ft) deeper than predicted, the target will be penetrated much later than plann

...flow regimes of the Louisiana Gulf Coast above a depth of [[depth::20,000 ft]] (6096 m). The uppermost regime consists of low-salinity, meteoric water d ...overpressure and undercompacted sediments below a depth of [[depth::10,000 ft]] (3048 m). The consequent thermal and geopressure gradient would drive flu

| Frequency || 5-1000 Hz || 5-1000 Hz || Harmonics > 1000 Hz | Logging Speed || Typical 2000-5000 ft/hr || Stationary (tomography) || TX speed adjusted to meet required signal-

...of keeping it substantially within the reservoir target until the desired length of horizontal penetration is reached ([[:file:M91Figure161.JPG|Figure 1]]). At very high angles, if the top reservoir is 15 m (49 ft) deeper than predicted, the target will be penetrated much later than plann

...nd the fault seal capacity: Journal of the Geological Society, v. 163, no. 5, p. 741-751.</ref>).]] ...e corresponding position on the diagram ([[:file:GumelarFigure5.jpg|Figure 5]]) using this technique, the alignment of the relationship positions at any

...s that sit on the sea floor. In moderately deep water (more than 45 m [150 ft] deep), a floating or semisubmersible rig is used. The semisubmersible rig ...eep water is defined as water depths between 500 and 2000 m (1640 and 6562 ft).<ref name=Weimerandslatt_2004>Weimer, P., and R. M. Slatt, 2004, Petroleum

UGM_Petroleum_Exploration_Fig_5.png|{{figure number|5}}Land Seismic Acquisition (Source: [https://www.oilinuganda.org/ Oil in Uga [[File:UGM_Petroleum_Exploration_Fig_7.png|thumb|upright=2.5|center|{{figure number|7}}Vertical section illustrating CMP recording The 0

...with a dual or triple completion in reservoirs deeper than [[depth::10,000 ft]]. well-completions_fig5.png|{{figure number|5}}Wellbore diagram of a conventional triple completion.

...h::100 ft]] above the earth's surface, but heights of 500 to [[depth::1500 ft]] are more typical. The line spacing for complete detail should not be much ...rth America: Boulder, CO, Geological Society of America, 4 sheets, scale 1:5,000,000.</ref> showed results on a continental scale. Paterson and Reeves<r

...te that the curves are responding to apparent bedding features less than [[length::1 in.]] thick. ...harply distinguishes between [[sandstone]] and shale layers thinner than [[length::1 in.]] By establishing a cutoff line as shown, everything to the right ca

...large-scale sand blankets. These may be very thick (more than 300 m [1000 ft]), and cover hundreds of square kilometers.<ref name=Richardsonetal_1988a>R .... The width-to-thickness ratio is estimated as between 50:1 and 100:1. The length-to-thickness ratio is estimated as 200 to 1.

...SEG (Society of Exploration Geophysicists) Geophysical Developments Series 5, p. 45–56.</ref>). Reprinted with permission from the AAPG.]] ...g river deposits in his database is only 38 m (124 ft), with 4–20 m (13–65 ft) as a common thickness range. Gibling makes the comment that despite their

;5. Edit logs to eliminate invalid data: Erroneous data can be recorded in cas ...eference before data processing can continue. A depth shift of [[length::3 ft]] can destroy an otherwise good correlation among logging measurements or b

...d that distributary channels show a common width range of 10–300 m (33–984 ft) (see Table 2). Distributary channels tend to be straight where they incise ...) || 50 m-1300+ km (164 ft-808+ mi); many > 1 km (0.62 mi); common range 0.5-10 km (0.3-6 mi) || 15-15,000+; some > 1000; common range 50-1000

...er-balanced (1000 psi) Increase well rate slowly Maximize perforations per ft Select rate less than critical velocity Use clay stabilizer || Preflush if ...e have cation exchange capacity (CEC) values of approximately 100, 20, and 5, respectively, Thus, total brine cation concentration must be higher to pre

...structure and probability factor f. B. Matrix and fracture on porous f = 0,5 (Erlich, 1971) ...s, shows comparative size in matrix with probability fracture factor f = 0,5. Residual saturation of oil has been evaluated by Erlich model with dimensi

...ng rock types (A-E) due to diffferences in capillarity. For example, at 50 ft above free water level, water saturations vary from 18% (rock type A) to 95 * ''h'' = height above the free water level (in ft)

...n: Presented at Offshore Europe, Society of Petroleum Engineers, September 5–8, Aberdeen, United Kingdom, [https://www.onepetro.org/conference-paper/S ...ments (Monicard, 1980). Vertical core plugs may also be cut every 1.5 m (5 ft) for example. On occasions, large pieces of full-diameter core are used for

...ellus Shale had mean random vitrinite reflectance values between 1.0 and 2.5% in the majority of the currently productive area, where most production ha ...imate of NGL resources ranged from 0.5 to 3.02 billion bbls (95 percent to 5 percent probability, respectively).

[[file:M91Ch13FG83.JPG|thumb|300px|{{figure number|5}}A pressure buildup test can be used to detect faults near the wellbore. Th ...and comes in contact with the fault plane ([[:file:M91Ch13FG83.JPG|Figure 5]]). Analytical methods are available to make a rough estimate of how far aw

...y or tertiary recovery. Items 1 through 4 occurred at Wattenberg, and item 5 is currently being tested. Unconventional fields experience field growth ju ...akota Plainview in 1998. Production occurs from approximately 4000 to 8500 ft below the surface across the field. Reservoir quality in the various horizo

...Upper Cretaceous Ferron Sandstone Member, Utah]: AAPG Bulletin, v. 95, no. 5, p. 693–727, doi: 10.1306/09271010025.</ref>). Note the dipping nature of ...a volume smaller than most reservoirs (500 × 500 × 25 m [1640 × 1640 × 82 ft]). Sech et al.<ref name=Sch09 /> used a surface-based modeling approach to

...parsely populated area of desert and low hills, mostly 300–500 m (984–1640 ft) above sea level (msl). The highest elevation here occurs at Jabal ‘Unayz ...) and Dijlah (Tigris) Rivers, which flow from Turkey and Syria through the length of Iraq to the Gulf of Arabia via the Shatt al Arab. The elevation at the I

| frompg = 5 ...ection and length of any particular line, such as "north 40&deg; east, 200 ft."]

...carbonate sand body with a mobile border 25 km (15 mi) long and between 0.5 and 2 km (0.3 and 1.2 mi) wide.<ref>Major, R. P., D. G. Bebout, and P. M. H ...r|1}}Ooid shoal, Bahamas; the bottom edge of the photograph represents a 4.5-km (2.7 mi)-wide transect. The lower inset is an illustration of a cliff ex

...e winching system often ruins SP logs. Look for a sine-form SP whose cycle length is the circumference of the cable drum. ...le, so expect mudcake to cause a caliper reading that is about [[length::0.5 in.]] smaller than the bit size. Bed boundaries are often accurately delimi

...ce systems have substantiated the volume of oil they contain, for example, 5.88253 times 107 m3 (370 million bbl of oil equivalent [BOE]) in the [[Barne ...eg API oil and 481.4 m3/day (17 mcf/day), with a gas-oil ratio (GOR) of 19.5 m3/m3 (109 scf/bbl) according to a scout ticket for this well.

...r|3}}Cores of distributary-mouth bar sequence. Diameter of cores is 13 cm (5 in.). A. Smooth, gray, partially laminated clays of the prodelta deposits. For a given length of time, prodelta deposits are thicker (because of high sedimentation) than

...than production from existing open natural fractures. To date, more than 2.5 tcf has been produced from the Big Sandy field,<ref name=Dw1986 /> and it s ...of water and 167,800 kg (370,000 lb) of sand was used to treat a 27 m (90 ft) gross interval of the Marcellus organic shale in the Range Resources 1 Ren

...ks in these sectors show the best reservoir characteristics (averages: TOC 5%; porosity 12%; clay 10%–20%; water saturation 20%), the most adequate ge ...il 2019), approximately 500 kboe/d as current production, and estimated 14.5 Bboe of proved plus probable reserves (2P) ([[:file:M125-VacaMuerta-Figure2