Hydrogeologic Conditions for the Appearance of Anomalous Formation Pressure in the Surkhan-Dar’Ya Oil-Gas Region

A. A. Kartsev, S. B. Vagin, T. I. Uvarova, I. V. Yarorchuk

Petroleum Geology: A Digest of Russian Literature

... conditions during drilling of deep wells. See Fig. 2. Where the ratio to hydrostatic pressure is less than 0.9, absorption should be expected. Normal...

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...

Mechanisms of Natural Fracturing in a Sedimentary Basin

Kinji Magara

AAPG Bulletin

... pressure after loading approaches normal hydrostatic (Schmidt, 1973, Fig. 1). At intermediate phases of compaction, slightly undercompacted...

Pressure Compartments in Sedimentary Basins: A Review

John S. Bradley and David E. Powley

AAPG Special Volumes

... dimensions, that prevents pressure equilibration to normal hydrostatic pressure. A pressure seal, as opposed to a capillary seal, restricts flow of both...

A New Perspective to Shallow Water Flow (SWF) and Sinking Well-Head Preventions in Deep Water

Selim Simon Shaker

GCAGS Transactions

... as the compaction trend (CT) instead of the normal compaction trend, since the normal hydrostatic pressure is only observed in the free flow zone A. Establishing...

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

James C. Niemann

GCAGS Transactions

... deformation zones underneath salt are not anomalously high pressure zones, but rather, low formation integrity zones. Pore pressure gradients were...

Patterns of Dynamic Pressure Increment of Formation-Fluid Flow in Large Drainage Basins, Exemplified by the Red Earth Region, Alberta, Canada

Jozsef Toth

CSPG Bulletin

... pressure gradients across flow-system boundaries are represented by p(d) curves crossing the line of normal hydrostatic pressure increase. The depth...

Abnormal Formation Pressure: A Review

L.A. Pickering, G.J. Indelicato

Rocky Mountain Association of Geologists

... ABSTRACT Abnormal formation pressure is defined as any pressure that devrates from the normal hydrostatic gradient. In order for these pressures to form...

Overpressure and Hydrocarbon Accumulations in Tertiary Strata, Gulf Coast of Louisiana; #41000 (2012)

Philip H. Nelson

Search and Discovery.com

... to normal hydrostatic pressure and increases with depth with gradients ranging from 0.44 to 0.80 psi/ft.  Effective stress is less than 2000 psi and can...

Naturally Underpressured Reservoirs: Applying the Compartment Concept to the Safe Disposal of Liquid Waste

Jim Puckette and Zuhair Al-Shaieb

Fort Worth Geological Society

.... In contrast, near-normal pressure suggests that the reservoir is part of a larger hydrostatic or hydrodynamic system. Fluid type is equally important...

Naturally Underpressured Reservoirs: Applying the Compartment Concept to the Safe Disposal of Liquid Waste, by Jim Puckette and Zuhair Al-Shaieb, #40071 (2003).

Search and Discovery.com

Integrated Analysis of Abnormal Pressures in Source Rocks: Theory and Implications for Jurassic Unconventional Resource Exploration in Saudi Arabia

Mohammed Al Duhailan, Mohammed Boudjatit, Nai-Shyong Yeh, Ivan Leyva Clay Kurison, Angelica Rios Alvarez, Yasser Ghamdi, Saad Shehri

Unconventional Resources Technology Conference (URTEC)

... to develop with 40% to 70% diffusion restriction for pressures. This restriction can maintain pressures above the regional normal hydrostatic pressure...

Geomechanical Analysis for CCS Study in the Subang Structure, Northern West Java Basin

Olifia Ammara Venty, Teddy Eka Putra, Nora Desiani

Indonesian Petroleum Association

... results in the reservoir interval indicate depletion in some reservoirs, while others show slightly higher values than normal hydrostatic pressure...

Distribution and Generation of the Overpressure System, Eastern Delaware Basin, Western Texas and Southern New Mexico

Ming Luo , Mark R. Baker , David V. LeMone

AAPG Bulletin

... must first estimate the average expected hydrostatic and lithostatic pressure gradients. These average gradients are standards to determine normal fluid...

Clays with Abnormal Interstitial Fluid Pressures

Richard E. Chapman

AAPG Bulletin

... it, but it will achieve stress equilibrium when the fluid has been reduced to normal hydrostatic pressure. The compaction processes set up fluid potential gradients...

Overpressure in Oil and Gas Fields of the USSR

V. S. Melik-Pashayev, V. V. Vlasenko, V. N. Seregina, M. A. Titunina

Petroleum Geology: A Digest of Russian Literature

... pressure anomaly coefficients, ka, which is the ratio of formation pressure to hydrostatic pressure at the same depth. The pools are in the Azov-Kuban, Cis...

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

Shaker, Selim S.

GCAGS Transactions

... and yielded normal hydrostatic pressure. The predicted pore-fracture pressure profile in this well was calculated using the principal stress concept...

Aquathermal Fluid Migration: GEOLOGIC NOTES

Kinji Magara

AAPG Bulletin

... geothermal gradients greater than 6.5°C/km (0.35°F/100 ft); in these basins the volumes of water in normal hydrostatic zones tend to increase...

Abstract: Frontier Exploration Basin Modeling Technology Tested in the Mature Arkoma Basin, Oklahoma, USA, by I. D. Meshri, S. S. Foland, S. L. Bolton, and J. M. Walker; #90957 (1995).

Search and Discovery.com

ABSTRACT: Defining the Supercritical Carbon Dioxide Window for Coalbed Methane Reservoirs in the Black Warrior Basin: Implications for Carbon Sequestration and Enhanced Coalbed Methane Recovery; #90013 (2003)

Jack C. Pashin, Richard E. Carroll

Search and Discovery.com

... 1,074 psi, which is equivalent to a depth of 2,480 feet under a normal freshwater hydrostatic gradient. All target coal beds are subcritically pressured...

WFT Data and Pressure Profile Analysis: Applications, Complexities, and Challenges

J. V. C. Howes

Indonesian Petroleum Association

.... Complexities encountered in pressure profile analysis include issues of (a) WFT-derived versus and PVTderived gradients, (b) inter-relation of gradient...

Abnormal Formation Pressures: Recognition, Distribution, and Implications for Geophysical Prospecting, Brazoria County, Texas

Edward T. Flanigan

GCAGS Transactions

... to interpret distribution of subsurface pressures. Three pressure regimes are defined in terms of vertical pressure gradients: normal pressure (0.465...

The Occurrence of Hydrocarbons in Overpressured Reservoirs of the Baram Delta (Offshore Sarawak, Malaysia)

G. Schaar

Indonesian Petroleum Association

... and with increase in burial depth, fluid pressures become increasingly higher than in the normal hydrostatic case, where fluid escape is possible. Figure 1 shows...

Links between Dynamic Pressure Variations and Internal Velocity Strucure in Experimental Turbidity Currents: Implications for Flow-Substrate Interactions, by William D. McCaffrey; #90052 (2006)

Search and Discovery.com

Some Causes of Anomalously High Formation Pressures

L. N. Kapchenko

Petroleum Geology: A Digest of Russian Literature

... normal hydrostatic pressure does not exceed a few million years even with very unfavorable conditions for filtration of water.” VNIGRI...