Abstract: Fault Seal and Weak Points; a Case Study from Njord, by Erling Rykkelid; #90039 (2005)

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Compressibility of sorptive porous media: Part 1. Background and theory

Shimin Liu and Satya Harpalani

AAPG Bulletin

... condition, that of uniform hydrostatic pressure over the entire outer surface of the porous body as well as throughout the entire interior and pore...

Pressure and Fluid Contact Evolution of “Basin Centered Gas” Accumulations, by Keith W. Shanley and Robert M. Cluff; #90042 (2005)

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The Sanga-Sanga Field

K. G. Jefferies

Indonesian Petroleum Association

... to coincide with marked increases in pressure gradients (from approximately hydrostatic to the equivalent of 0.62 psi/ft). Some dipmeters in more recently...

Petroleum Geology of Southern Iraq

M. W. Ibrahim

AAPG Bulletin

...------------------------------ [EQUATION] mud-pressure formula (Kumar, 1977): EQUATION (1) where P = hydrostatic pressure, Wt = mud weight in lb/gal, and D...

Geohydrology of Buried Triassic Basin at Savannah River Plant, South Carolina

I. Wendell Marine

AAPG Bulletin

... of pressure dissipation in a formation that is laterally infinite and bounded below by an impermeable base and above by a formation in which hydrostatic...

CONTINUAL STUDY OF HYDRAULIC FRACTURING OF THE CLINTON SANDSTONE, MUSKINGUM COUNTY, CLAYSVILLE, OHIO PLAY

Walter F. Fox, Jr., Quaker State Oil Refining Corp., Parkersburg, W. Va.

Ohio Geological Society

... to the BPM, Q, recorded on Table II. Ph, column 3, is the calculated hydrostatic pressure considering the sand content recorded in column 2...

Water Production from Abnormally Pressured Gas Reservoirs in South Louisiana

W. E. Wallace

GCAGS Transactions

... was abandoned, the shut-in bottom hole pressure was 3250 psi (normal hydrostatic pressure would have been 5860 psi, maximum). Geological Conditions...

Manage Risk with Breakthrough Seismic Acquisition Technology: The GeoStreamer Story Continues New Reservoir Opportunities Revealed

Cyrille Reiser, Folke Engelmark

Petroleum Exploration Society of Australia (PESA)

... than 10,000 km 2 of 3D in a variety of the seismic velocity variations in the depth under hydrostatic pore pressure follows of geological settings...

Geopressured Shale and Sealing Effect of Smectite to Illite Transition

Robert L. Freed , Donald R. Peacor

AAPG Bulletin

... within a rock at a given depth maintain hydrostatic continuity with the surface, then the pore pressure in that rock is due to the load exerted...

Impact of Pore Pressure Depletion on Stress Reorientation and its Implications on the Growth of Child Well Fractures

Shivam Agrawal, Mukul Sharma

Unconventional Resources Technology Conference (URTEC)

... as a result of fluid production. This is because stresses are affected not only by pressure, but also by pressure gradients. In Figure 4., changes in total...

Abnormally High Fluid Pressure: Survey of Some Basic Principles: GEOLOGIC NOTES

William J. Plumley

AAPG Bulletin

..., provided a rigorous approach for analysis of the possible magnitude of such effects. MODELS OF NORMAL FLUID PRESSURE We can specify some subsurface rock...

Practical Aspects of Geothermometry

Robert H. Goldstein, T. James Reynolds

Special Publications of SEPM

... commonly closely approach the entrapment temperature (Fig. 3.7). For aqueous systems trapped at hydrostatic pressures, the pressure correction (amount...

Long-Range Petroleum Migration in the Illinois Basin (1)

CRAIG M. BETHKE , JACKIE D. REED , and DONALD F. OLTZ

AAPG Bulletin

... is the deviation in pressure from a hydrostatic gradient. Groundwater moves from areas of high to low potential (i.e., toward areas of lower mechanical...

Green River(!) Petroleum System, Uinta Basin, Utah, U.S.A.: Chapter 25: Part V. Case Studies--Western Hemisphere

Thomas D. Fouch, Vito F. Nuccio, Donald E. Anders, Dudley D. Rice, Janet K. Pitman, Richard F. Mast

AAPG Special Volumes

... equilibrated to normal hydrostatic gradients. In these rocks, the rate of hydrocarbon and other fluid production in the zone of thermal generation is equal...

Gas-Hydrate Horizons Detected in Seismic-Profiler Data from the Western North Atlantic

Brian E. Tucholke , George M. Bryan , John I. Ewing

AAPG Bulletin

... if we assume a hydrostatic pressure gradient of 0.1 atm/m below sea level and some thermal gradient in the sediment. Although there is considerable...

Relationship between fractures, fault zones, stress, and reservoir productivity in the Suban gas field, Sumatra, Indonesia

Peter Hennings, Patricia Allwardt, Pijush Paul, Chris Zahm, Ray Reid Jr., Hugh Alley, Roland Kirschner, Bob Lee, Elliott Hough

AAPG Bulletin

... gradients (Sv) were estimated from an integration of density logs from shallow levels through the reservoir interval. Pore pressure (Pp) was interpreted...

The Three Elements of Structural Geology Part 5, #41849 (2016).

Terry Engelder,

Search and Discovery.com

...ow regime and the crack-propagation regime such that ductile flow suppresses sd to favor crack propagation upon increase in Pp above hydrostatic pressu...

Bowdoin Field--U.S.A. Bowdoin Dome, Williston Basin

Dudley D. Rice, Gary L. Nydegger, Charles A. Brown

AAPG Special Volumes

... and pressure gradients can be expected in areas where stratigraphy, structure, and capillary pres ures are major influences. Some pressure variations near...

The Occurrence, Causes and Detection of Abnormal Pressure in the Malay Basin

Indarjit Singh, C. H. Ford

Southeast Asia Petroleum Exploration Society (SEAPEX)

... of subsurface formations whereby the pressure exerted by the fluids within a rock unit at a particular depth exceeds the hydrostatic pressure exerted...

Stress-Dependent Flow, Mechanical, and Acoustic Properties for an Unconventional Oil Reservoir Rock

Gang Han, Marte Gutierrez, Peter Schmitz

Unconventional Resources Technology Conference (URTEC)

... preparation and laboratory setup, most measurements of unconventional rock are still limited to hydrostatic stress conditions. This paper investigates a nano...

Subsurface Geotechnical Hazards in Petroleum and Geothermal Development

Robert C. Erickson

AAPG Special Volumes

... exceed a normal or hydrostatic pressure expected for a given depth below the surface. Geopressured sequences of rock can be recognized by several...

Compaction of Lithic Sands: Experimental Results and Applications (1)

EDWARD D. PITTMAN and RICHARD E. LARESE

AAPG Bulletin

... were run at 75 degrees C (167 degrees F) with a 2:1 ratio between piston and pore pressure to approximate the normal hydrostatic gradient of 0.465 psi...

Some Considerations in the Application of Wireline Logging to Environmental Investigations

Bruce E. Gaither

GCAGS Transactions

... (i.e., mud rotary), fresh-water drilling mud is continuously circulated in the borehole during drilling. Hydrostatic pressure in the borehole...

Deformation Mechanism of Unconsolidated Quartz Sands as a Function of Grain Size Distribution: Insights Into Deformation Band Formation in Mixed Aeolian-Fluvial Reservoirs; #51606 (2019)

Karl Clark, Ian G. Stimpson, John Bedford, Dan Faulkner

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... as mixing to attain any grain size distribution we require. Hydrostatic deformation tests were performed to establish the critical effective pressure (P...