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The AAPG/Datapages Combined Publications Database

Showing 3,929 Results. Searched 200,357 documents.

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The Origins of Abnormal Fluid Pressures

Norman E. Smith, H. George Thomas

Houston Geological Society

..., e.g., the hydrostatic gradient of fresh water is 0.433 psi/ft. A pressure in psi can be calculated quickly for any depth by p = λ D (Appendix, #2...

1971

A Review of the Methods of Detection and Estimation of Geopressure from Well Logs

Leonel L. Saavedra

Bulletin of South Texas Geological Society

... corresponding to DA (see Figure 8) GH = hydrostatic pressure gradient = .465 psi/ft. in U.S. Gulf Coast Go = overburden pressure gradient, psi/ft. Equation...

1985

Hydrodynamics and Overpressuring in the Jeanne D'Arc Basin, Offshore Newfoundland, Canada: Possible Implications for Hydrocarbon Exploration: REPLY

N.A. Yassir, A.L. Rogers

CSPG Bulletin

... therefore questions our methodology of determining groundwater flow, basing his argument on our definition of the hydrostatic gradient. His comments were...

1994

Subsurface Formation Pressure Gradient vs. Slope: Perception and Pitfalls

Selim S. Shaker

GCAGS Transactions

...Subsurface Formation Pressure Gradient vs. Slope: Perception and Pitfalls Selim S. Shaker 2024 121 130 Vol. 73 (2024) Distinguishing the difference...

2024

Pressure Index (PI): A Novel Practical Method for Evaluating Pressure in Offshore Malaysia

Yudiyoko Ega Sugiharto, Gamal R. Gaafar, Isham F. Ishak, Benard Ralphie, Muhammad Banuri

Indonesian Petroleum Association

... hydrostatic equilibrium. Hydrostatic pressure increases with depth measured from the surface due to the increasing weight of fluid exerting downward...

2020

Aquathermal Fluid Migration: GEOLOGIC NOTES

Kinji Magara

AAPG Bulletin

... decrease as the pressure (or burial depth) increases. A hydrostatic-pressure gradient of 0.47 psi/ft was used. This progression to lower densities...

1974

Correlation of the Pore Pressure Gradient and Maturity of the Niobrara Formation Across the Powder River Basin, Wyoming; #30634 (2021)

Adriana G. Perez, David Yale, Robert Raney, Ross Taylor

Search and Discovery.com

...Pressure higher than hydrostatic pressure at reservoir depth is defined as overpressure. If the pressure gradient is more than 0.53 psi/ft...

2021

Pore Pressure Profiles in Deep Water Environments: Case Studies from Around the World

Stephen O'Connor, Richard E. Swarbrick, Phillip Clegg, and David T. Scott

Search and Discovery.com

... km 3 km (2) Pressure Examples Gulf of Mexico, Nile Delta, Mid-Norway Shale Gradient Depth O/Pres~O/Psh Three isolated reservoirs Hydrostatic...

Unknown

Nature of Anomalously High Formation Pressures in Meso-Cenozoic Sediments of the Eastern Cis-Caucasus

A. G. Durmish’yan, V. D. Aslanov, B. L. Aleksandrov, T. R. Rakhmanov, F. G. Sharafutdinov

Petroleum Geology: A Digest of Russian Literature

.... For pools in platform areas (Fig. 1b) at depths of 3200-4200 m the average gradient of pressure is 0.105 atm/m, whereas for pools of folded terranes (Fig...

1977

Development of Long Beach Unit in Offshore Part of Wilmington Field: ABSTRACT

S. E. Szasz, J. H. Fantozzi, William A. Adent

AAPG Bulletin

.... At the start of the development, the reservoir pressure was found to be approximately hydrostatic on the south flank but considerably less than hydrostatic...

1969

Abstract: Trap Barriers --Hydrodynamic, Stratigraphic, Wettability

Gilman A. Hill

Houston Geological Society Bulletin

... hydrostatic conditions, only 5 to 50 feet of oil column before the capillary pressure exceeds the barrier entry pressure and causes oil to leak through...

1960

Trap Barriers—Hydrodynamic, Stratigraphic, Wettability: Abstract

Gilman A. Hill

Tulsa Geological Society

... the hydrodynamic pressure gradient. Reservoir pinchouts or terminations by facies change, cementation, unconformity, or faulting often have...

1960

Gulf of Mexico Subsalt Deformation Zones: Weak Formation Integrity Rather than Anomalous High Pressure Zones

James C. Niemann

GCAGS Transactions

... the pressure gradient increases from the hydrostatic because the water cannot be expulsed from shale pores thus preserving some porosity and supporting...

1997

Thermobarometric Conditions of Formation of Oil and Gas Pools at Great Depths in Areas of Cenozoic Downwarping

L. A. Pol’ster, Yu. A. Viskovskiy, V. A. Nikolenko, L. G. Shustova

Petroleum Geology: A Digest of Russian Literature

... the straight line of hydrostatic pressure. This is a stage of intensive compaction of clayey rocks and expelling of fluids into reservoir rocks...

1981

ABSTRACT: Pore pressure prediction from seismic data for well planning in Block 22 Final

M. Bacon, N. Mundel, J. Hearne, R. Lubbe and S. O’Connor

Geological Society of Trinidad & Tobago

... vertical stress, derived from well density data and water depth, Ph is hydrostatic pore pressure (normal gradient 0.44 psi/ft), Vnorm is the velocity...

2007

Pressures in the Los Monos-Huamampampa System and Their Control in Hydrocarbon Fields Occurrence and Size; #11118 (2018)

Daniel Starck

Search and Discovery.com

... CONTROL … THE ANALYSIS SCENARIO: THE DEPTH-PRESSURE PLOT THE DEPTH-PRESSURE PLOT PRESSURE GRADIENT IN “METRIC” SYSTEM, THE FRESH WATER GRAD...

2018

EXTENDED ABSTRACT: Geological Perception of Pore and Fracture Prediction: Case Histories from the Gulf of Mexico

Shaker, Selim S.

GCAGS Transactions

...).The pressure profile in this case will be represented by a hydrostatic gradient at the shallow section (normally pressured). The PP will show a progressive...

2004

Geopressure Compartmentalization in Keathley Canyon Deep Water, Gulf of Mexico

Selim S. Shaker

GCAGS Transactions

... (S1, S2, S4 & S5). On the other hand, on both sides of the incompetent seal (S3), the pore-pressure gradient remains in the same hydrostatic envelope...

2001

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