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The AAPG/Datapages Combined Publications Database
Showing 3,929 Results. Searched 200,293 documents.
Abstract: Pore Pressure and Fracture Gradients Prediction Challenges in Salt-encased Carbonate Stringer Reservoirs in South Oman Salt Basin; #91204 (2023)
Fanis Khayrutdinov, Dmitrii Smirnov, Pankaj Agrawal, Aiman Quraini, Abdullah Hadhrami, Omar Al Isaee, Muhannad Al Hashami
Search and Discovery.com
.... Estimating lithostatic pressure based on density logs provides upper limits for reservoir pressure prediction and lower limit for fracture gradient when...
2023
Reservoir vs. Seal Pressure Gradients: Calculations and Pitfalls; #41298 (2014)
Selim Simon Shaker
Search and Discovery.com
... in a virgin reservoir shows a hydrostatic gradient with cascaded excess pressure envelopes. The gradient’s slope in each of the sub-surface’s four...
2014
Abstract: Evolution of Overpressured and Underpressured Oil and Gas Reservoirs, Anadarko Basin of Oklahoma, Texas, and Kansas, by Philip H. Nelson and Nicholas Gianoutsos; #90124 (2011)
Search and Discovery.com
2011
Abstract: The Origins of Abnormal Fluid Pressures
Norman E. Smith, H. George Thomas
GCAGS Transactions
... and in relation to potential energies within subsurface fluids. Various normal hydrostatic gradients are discussed, and a practical normal gradient...
1970
Initial Formation Pressures in Pools with Lithologic Heterogeneity of the Pay Zones
V. F. Noval
Petroleum Geology: A Digest of Russian Literature
... gradient is 0.094-0.13 kgs/(cm2. m). The ratio of the value of initial formation pressure to the calculated background hydrostatic pressure...
1974
Regional Pore Pressure Variations of the Wolfcamp, Dean, Spraberry, and Bone Spring Formations of the Midland and Delaware Basins in the USA
Shuvajit Bhattacharya, Ray Eastwood, Katie Smye, Sam Moonesan, Brian Casey, David Hoffman
Unconventional Resources Technology Conference (URTEC)
... to or below the hydrostatic pressure gradient (~0.25-0.45 psi/ft), whereas the units of the Wolfcamp Formation are at or above the hydrostatic pressure...
2024
ABSTRACT: Formation Damage Caused by Excessive Borehole Fluid Pressures During Environmental Drilling in Unconsolidated Coastal Plain Sediments: A Petroleum Engineering Analog; #90013 (2003)
DOUGLAS E. WYATT
Search and Discovery.com
... the petroleum industry suggests that formation damage is likely when the hydraulic pressure gradient from the drilling or grouting exceeds the fracture...
2003
ABSTRACT: Pressure Regimes, Burial History, and Source Rock Maturation of the Morrow Formation in the Western Anadarko Basin and the Hugoton Embayment, Kansas, Oklahoma, and Texas, by Lars B. Hubert; #91020 (1995).
Search and Discovery.com
1995
Deep Pressure Seal in the Lower Tuscaloosa Formation, Louisiana Gulf Coast
Suzanne D. Weedman, Albert L. Guber, and Terry Engelder
AAPG Special Volumes
.... The overpressures in all of the Moore-Sams and some of the Morganza fields wells follow a local hydrostatic gradient with increasing depth indicating that pore...
1994
Numerical Simulations of Overpressured Compartments in Sedimentary Basins
E. Sonnenthal and Peter J. Ortoleva
AAPG Special Volumes
... and Seals In many sedimentary basins there are regions where the fluid pressure exceeds the hydrostatic pressure and may approach lithostatic values...
1994
Mechanisms of Natural Fracturing in a Sedimentary Basin
Kinji Magara
AAPG Bulletin
... in the hydrostatic pressure zone, but is abnormally low in the abnormally pressured zone. Fracture pressure (and its gradient) given as a sum of (least...
1981
Short note: Formation fracturing caused by excessive borehole fluid pressures during drilling in unconsolidated or coastal-plain sediments may be an unknown problem on your project
Douglas E. Wyatt, Frank H. Syms
Environmental Geosciences (DEG)
... formation damage is likely: the pressure of the borehole fluids at a given depth and the in-situ formation fracture stress gradient. This assumes...
2005
Abnormal Formation Pressure
John S. Bradley
AAPG Bulletin
.... As shown in Figure 3, with a hydrostatic gradient of 0.5 psi/ft and a temperature gradient of 1.75°F/100 ft, the normal pressure increases at a rate of 0.5...
1975
ABSTRACT: Pore Pressure Prediction from 3-D Seismic Data: A Feasibility Study for Unconventional Gas Exploration in Saudi Arabia, by Mujica, Daniel L.; Aldajani, Abdulfattah; #90141 (2012)
Search and Discovery.com
2012
Rapid Methods for Assessing Formation Pressures: An Example from the Lower Cretaceous of the Greater Green River Basin
R.A. Levey
Rocky Mountain Association of Geologists
..., the hydrostatic gradient is 0.465 psilft. Formation pressure gradients above the regional hydrostatic gradient are termed overpressured (above normal pressure...
1992
Challenges Associated with Drilling Hydrostatic/Subhydrostatic Reservoir: Fluid Engineering Aspect, #40744 (2011)
Ajay Kumar, Ratan Singh, V. N. Rai, Dr. Vinod Sharma
Search and Discovery.com
.... Introduction Production over the years has diminished reservoir pressure to near hydrostatic to sub-hydrostatic. Pressure depletion in shales (above pay...
2011
Effective Stress, Porosity, and Abnormal Pressure in the Eugene Island Block 330 Field, by A. Deshpande and P. B. Flemings; #90986 (1994).
Search and Discovery.com
1994
The Relationship Between Geothermal Gradient and the Composition of Oil
G. V. Rudakov
Petroleum Geology: A Digest of Russian Literature
..., and can lead to an increase in the formation pressure above the hydrostatic pressure. On a basis of this discussion it can be stated that the role...
1961
Time of Oil and Gas Accumulation: ABSTRACT
A. I. Levorsen
AAPG Bulletin
... as the pressure gradient develops between the pool and the well hole. The expanding gas moves toward the area of lower pressure, either carrying or pushing...
1949
A New Perspective to Shallow Water Flow (SWF) and Sinking Well-Head Preventions in Deep Water
Selim Simon Shaker
GCAGS Transactions
... hydrostatic gradient (Dahlberg, 1994; Shaker 2001). Under the conditions of increasing pore pressure gradient with depth, water flows according to Darcy’s law...
2015
The Interpretation of Fluids and Pressures in Determining Conventional and Unconventional Gas Resources in the Rocky Mountain Region
John R. Forster, John C. Horne
Rocky Mountain Association of Geologists
... is the recognition of an aquifer and its hydrostatic pressure gradient. The “normal hydrostatic pressure gradient” is defined as: formation water gradient of 0.45...
2005
Subsurface formation pressure gradient vs. slope: Perception and pitfalls
Selim S. Shaker
International Meeting for Applied Geoscience and Energy (IMAGE)
...Subsurface formation pressure gradient vs. slope: Perception and pitfalls Selim S. Shaker Subsurface Formation Pressure Gradient vs. Slope...
2023
Stress Evolution of Maari Field, NZ: Implications for Fault/Fracture Integrity, Stress Prediction, Infill Drilling, and Borehole Integrity; #20442 (2018)
Roderick W. Van Koughnet, David A. Castillo, Vivek Paranjpe
Search and Discovery.com
... and SHmax decreases about 20% of the pore pressure change. For localized increases in pore pressure above hydrostatic due to water injection...
2018
ABSTRACT: Basin-Scale Compartments and Their Genesis, by Z. Al-Shaieb, C. Price, and J. Puckette; #91021 (2010)
Search and Discovery.com
2010
Abstract: Pressure Stratigraphic Sequences for Basin Analysis, by K. Williams, M. Croy, and J. Gevirtz; #90090 (2009).
Search and Discovery.com
2009