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• Hydrodynamic traps: mapping
  ...rmula for U where U = V – Z. The values for Z, the subsea elevation of the target aquifer, can be determined by simply overlaying a structure contour map on A critical step in mapping hydrodynamic traps in a target formation is making a water isopotential map (step 3 above). Before that ca
  4 KB (601 words) - 22:27, 17 February 2022
• Designing a surficial geochemical survey
  * Anticipated target size and shape of the anomaly (or geologic target) ...specpubs/memoir66/18/0243.htm Importance of sampling design and density in target recognition], in D. Schumacher and M. A. Abrams, eds., Hydrocarbon Migratio
  6 KB (826 words) - 17:33, 25 January 2022
• Mapping paleogeography
  ...one [[Depositional sequence identification|depositional sequence]]? Is the target the entire section?
  3 KB (346 words) - 20:13, 4 February 2022
• Geosteering
  ...rofile by using field observations to place the wellbore in the designated target is called Geosteering. Geosteering can use a large variety of tools and tec
  1 KB (185 words) - 19:43, 3 March 2016
• Predicting carbonate reservoir location and quality
  # Study known accumulations that occur within the target formation. # Put target formation in a global and regional climatic framework. At the time of depos
  7 KB (894 words) - 14:15, 11 April 2022
• Well planning
  * What target(s) will be evaluated? * How will the well(s) be drilled to reach those target(s)?
  6 KB (779 words) - 15:09, 24 January 2022
• Three-dimensional seismic method
  ...ce target zone and the aperture size required for adequate imaging of that target zone.<ref name=pt07r64>Yilmaz, O., 1987 Seismic Data Processing: Society of ...in which migration is performed. Just having a dense coverage on top of a target zone, for example, a 25-m in-line trace spacing and a 25-m cross-line trace
  8 KB (1,201 words) - 20:24, 21 January 2022
• Selecting a surficial geochemistry survey method
  ! Medium to be Sampled || Target to be Analyzed || Methods ! Medium to be Sampled || Target to be Analyzed || Methods
  6 KB (809 words) - 17:05, 25 January 2022
• Types of wells
  ...the drill bit is deflected at an angle from the vertical toward a specific target. Deviated wells are commonly drilled from fixed drilling locations such as ...ng assembly, and drilling will then proceed out of the window toward a new target.
  22 KB (3,567 words) - 17:20, 11 March 2019
• Petrophysical analysis of lithofacies
  ...traps. A petrophysical analysis of the lithofacies of a rock section in a target area can help determine if such a relationship exists. ...oir characteristics, despite high porosity readings on the logs. Thus, the target of interest is the highstand mound facies.
  6 KB (763 words) - 18:53, 4 February 2022
• Well types
  ...the drill bit is deflected at an angle from the vertical toward a specific target. Deviated wells are commonly drilled from fixed drilling locations such as ...ng assembly, and drilling will then proceed out of the window toward a new target.
  24 KB (3,753 words) - 19:33, 3 March 2016
• Phases of a seismic project
  ...ned to give optimum results for a particular depth interval containing the target(s). If there are design, acquisition, or [[Basic seismic processing|process
  3 KB (455 words) - 22:00, 25 January 2022
• Synthetic seismograms: correlation to other data
  ...over some limited interval in the well, probably centered on the reservoir target. If the fit is not good enough, then the parameters are changed (updated) a
  3 KB (486 words) - 19:10, 27 January 2022
• Wellbore trajectory
  ...drilling'' refers to any method employed to hit a predetermined subsurface target. One application of directional drilling is the development of [[offshore r ...ellbore is allowed to move naturally to the right, forming an arc into the target.
  14 KB (2,167 words) - 20:46, 19 January 2022
• Fracking
  Fracking technique begins by drilling vertically up to the target reservoir layer. Drilling is then followed by the installation of a protect
  3 KB (484 words) - 21:18, 27 March 2019
• Structural maps and cross sections
  * An [[Subsurface_maps#Isopach|isopach map]] of the target reservoir—especially important if the reservoir displays significant stra
  4 KB (504 words) - 14:17, 2 February 2022
• Amplitude (seismic)
  ...larity of onshore seismic data. If target is carbonate or regional geology target has [[coal]] lithology. Polarity prediction can assume that Carbonate has s
  8 KB (1,291 words) - 15:49, 18 January 2017
• Magnetotellurics case history: rugged carbonate terrain (Highlands of Papua New Guinea)
  ...s area, however, is an excellent [[Magnetotellurics|magnetotelluric]] (MT) target.<ref name=ch16r1>Billings, A. J., and J. H. Thomas, 1990, The use and limit
  4 KB (520 words) - 15:12, 31 January 2022
• East Breaks petroleum geology
  ...pe basin]] [[Gravity flow|gravity-flow]] sands are the principal reservoir target in the High Island–East Breaks area for all except the most shallow strat
  4 KB (494 words) - 13:44, 5 December 2023
• Amplitude versus offset (AVO) analysis
  ...red model]] of the earth in the vicinity of the exploration or development target. To accomplish this goal, a systems approach to the problem is used. Major ...erpret the AVO study using well log data in the vicinity of an exploration target.
  12 KB (1,723 words) - 18:41, 20 January 2022
• Petroleum exploration
  ..., you have to know is there any source rock in your target or not. If your target doesn’t have any source rock, it will absolutely no petroleum system ther ...d petrophysical analysis is also gives more information of the type of the target like its viscosity, chemistry, API, carbon content, etc.
  15 KB (2,331 words) - 19:12, 17 April 2019
• 3-D seismic data: immersive visualization
  ...ed horizons, and between faults to locations where the wells penetrate the target horizons. Since head tracking is used to properly alter the data projection
  4 KB (601 words) - 19:49, 27 January 2022
• Austin Chalk, onshore U.S. Gulf Coast
  ...il fields (Fig. 1) (Pitman et al., 2020). It remains an active exploration target onshore Gulf Coast since the first hydrocarbon discovery in the 1920s. To d ...ely evaluated in recent years. And the players and the hottest exploration target changed drastically. ConocoPhillips and Marathon once leased over 200,000 a
  8 KB (1,200 words) - 21:22, 3 March 2022
• Selling a structural play
  ! Target Group
  5 KB (738 words) - 15:58, 2 February 2022
• Preparing to go to the field
  ...de in your quest for data. For example, if carbonates are your exploration target, the modern reefs in the Bahamas or the ancient Permian reef complex of Wes
  5 KB (730 words) - 22:36, 1 February 2022
• Perforation design
  ...ng the well to the reservoir. Usually the pay zone or interest zone is the target for perforation. This will allow the communication of fluids to form betwee * Limited entry perforation: A restriction of perforation based on the target zone’s thickness, stresses, and number of layers.
  12 KB (1,786 words) - 21:02, 21 April 2022
• Austin Chalk, Tokio, and Eutaw Formations, U.S. Onshore Gulf Coast (USGS)
  ...pplication of modern drilling methods has made it possible to identify and target porous intervals in the Austin chalk using horizontal wells and multi-stage
  6 KB (846 words) - 20:58, 6 April 2021
• Sandstone diagenetic processes
  ...h more ionic species. Either (1) porosity–depth plots of sandstones of the target sandstone that are near the prospect area or (2) computer models that incor
  7 KB (870 words) - 20:30, 5 April 2022
• Seismic data preparation for mapping
  ...small 3-D data set from the Glenn Pool field in northeastern Oklahoma. The target is the Ordovician Wilcox Formation. The interpretation was done using a sys
  7 KB (1,064 words) - 19:11, 27 January 2022
• Bakken and Three Forks Formations, Williston Basin, North Dakota and Montana
  ...by the end of 2020. Although the upper Three Forks interval is the primary target due to proximity to the organic-rich lower Bakken shale member, drilling an
  7 KB (1,004 words) - 22:08, 4 March 2022
• Measurement while drilling
  ...le of penetration. This helps ensure that the horizontal wellbore stays on target and within the desired reservoir interval.
  8 KB (1,083 words) - 21:18, 19 January 2022
• Seismic data display
  ...final opportunity to choose the frequency band that highlights the seismic target best. This highly subjective decision is usually made by testing several ra
  9 KB (1,404 words) - 21:17, 19 January 2022
• Depositional sequence analysis of plays
  ...uality rocks, in the context of a depositional sequence. Knowing where the target interval and area are within a depositional sequence gives us the ability t
  8 KB (1,184 words) - 20:44, 4 February 2022
• Siliciclastic shorelines and barrier island reservoirs
  ...6). Horizontal wells have been drilled in several Brent Province fields to target bypassed oil in the lower shore face.<ref>Braithwaite, C. I. M., J. D. Mars ...er island sandstones and bypass the other units. Efforts should be made to target the poorer quality intervals for this reason. Ambrose et al.<ref>Ambrose, W
  18 KB (2,607 words) - 15:33, 15 January 2024
• Predicting sandstone reservoir porosity
  ...nments can help us predict the porosity of reservoir system rocks when the target formation is unsampled within the basin. Analog values, however, may have w
  10 KB (1,384 words) - 15:00, 6 April 2022
• Seismic interpretation
  ...rd modeling of seismic data]]). This verifies the seismic signature of the target, the location of the mapping horizon, and the adequacy of the time-depth fu
  10 KB (1,520 words) - 18:48, 21 January 2022
• Deep-water marine reservoirs
  ...ir connectivity across a large area || Levee sediments can be a production target in their own right ...in, v. 87, no. 4, p. 609–627.</ref> The levee deposits can be a production target in their own right. In the Ram-Powell field in the Gulf of Mexico, producti
  20 KB (2,850 words) - 15:33, 15 January 2024
• Magnetics
  ...be much greater than the depth of the anomaly sources that are the survey target. The data are usually processed to produce total intensity [[contour]] maps
  10 KB (1,481 words) - 15:39, 24 January 2022
• Types of completions
  ...nd logging the reservoir. If for some geological or engineering reason the target formation is not productive, then money has been spent to set casing in a w
  13 KB (1,944 words) - 19:56, 18 January 2022
• Borehole gravity
  ...in both open and cased holes. Gas-saturated sands are a particularly easy target.<ref name=pt07r16>Gournay, L. S., and R. E. Maute, 1982, Detection of bypas
  10 KB (1,517 words) - 15:54, 20 January 2022
• Enhanced oil recovery
  ...ng oil saturation prior to a thermal flood is usually high so that the EOR target is large. The choice of hot water injection, continuous steam injection, cy
  12 KB (1,794 words) - 21:19, 19 January 2022
• Introduction to biosteering operation
  ...complementing LWD tools or seismic data. There may be instances where the target reservoir is barren of microfossils. Recognizing the fossil assemblage abov The landing phase is the term used for placing the well path into the target reservoir layer at the proper desired angle. A successful landing requires
  20 KB (2,916 words) - 21:04, 21 April 2022
• Eagle Ford Group in southwest Texas (USGS)
  ...rd Group is typically divided into upper and lower strata with the primary target being the mainly Cenomanian, organic-rich, calcareous lower Eagle Ford. The
  11 KB (1,594 words) - 19:15, 8 February 2024
• Eagle Ford Group, southwest Texas
  ...rd Group is typically divided into upper and lower strata with the primary target being the mainly Cenomanian, organic-rich, and calcareous lower Eagle Ford.
  10 KB (1,550 words) - 21:50, 3 March 2022
• Bakken and Three Forks Formations, Williston Basin, North Dakota and Montana (USGS)
  ...stence by mid-2020. Although the upper Three Forks interval is the primary target due to proximity to the organic-rich lower Bakken shale member, drilling an
  11 KB (1,595 words) - 20:20, 2 June 2021
• Australia, Northern TerritoryVelkerri Formation, Beetaloo Sub-basin
  ...Geological Survey, Record 2018-006.</ref>. The Amungee Member is the main target for hydrocarbon exploration within the Velkerri Formation, it represents th
  11 KB (1,597 words) - 15:02, 9 January 2024
• Electrical methods
  ...with the choice primarily based upon the depth and geometry of the survey target. The measured surface potential field is interpreted in terms of the subsur
  15 KB (2,130 words) - 21:19, 19 January 2022
• Well completion
  ...nd logging the reservoir. If for some geological or engineering reason the target formation is not productive, then money has been spent to set casing in a w
  19 KB (2,910 words) - 21:06, 18 January 2022
• Structural geology
  ...es across these faults. The updip area on the downthrown block is the main target of oil and gas exploration because it has synthetic and antithetic faults a
  14 KB (2,168 words) - 21:31, 13 March 2019
• Meandering fluvial reservoirs
  ...ormally contain large volumes of hydrocarbons, although they may provide a target for infill wells onshore. Ambrose et al.<ref name=Ambroseetal_1991>Ambrose, ...elatively cheap, but they are less likely to make much profit as a primary target offshore. However, if several of these sand bodies overlap with each other,
  32 KB (4,727 words) - 21:03, 15 January 2024

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