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The AAPG/Datapages Combined Publications Database

Showing 214 Results. Searched 191,924 documents.

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Aquathermal Pressuring--Role of Temperature in Development of Abnormal-Pressure Zones: GEOLOGICAL NOTES

Colin Barker

AAPG Bulletin

... in terms of the geostatic ratio, which is the ratio of observed fluid pressure to the lithostatic pressure at the same depth. Normal hydrostatic pressures...


Geothermal and Geopressure Assessment with Implications for Carbon Dioxide Sequestration, Lower Tuscaloosa Formation, Louisiana

Timmon Drumm, Jeffrey A. Nunn

GCAGS Transactions

... on the log header. Pressure values were converted into geostatic ratios, which are pore fluid pressures/height of the fluid column. Data from the 96...


Clays with Abnormal Interstitial Fluid Pressures

Richard E. Chapman

AAPG Bulletin

...) introduced a useful parameter, ^lgr, which can be written EQUATION (4) and is the ratio of fluid pressure to geostatic pressure at depth z. For many...


Physical Properties

Jeffrey S. Hanor

Special Publications of SEPM

... PRESSURE (= LITHOSTATIC PRESSURE = GEOSTATIC PRESSURE), the pressure exerted by the bulk rock, solid grains plus fluid. 3 . SOLID FRAMEWORK PRESSURE...


The State of Stress in the Earth Crust: Its Importance in Petroleum Engineering

Ph. Charlez, D. Despax

Indonesian Petroleum Association

... prevailing in the deep rock beds. This paper is divided into three parts. In the first part, we explain the different origins of the "geostatic state...


Calculated Compaction States of Thick Abnormally Pressured Shales

Richard S. Bishop

AAPG Bulletin

... or dynes/km) of geostatic (^ggro), lithostatic (^ggr), and hydrostatic (^ggrw) columns. The geostatic load is thus the total unit pressure exerted...


Exploration Ramifications of Subsurface Fluid Migrations in the Lake Borgne-Valentine Area of Southeastern Louisiana

Glen M. Gatenby

GCAGS Transactions

.... The pressure is studied using the geostatic ratio: defined as the observed interstitial fluid pressure divided by the total overburden pressure...


Abnormal Formation Pressure

John S. Bradley

AAPG Bulletin

... of the vertical lithostatic pressure (PLH = 0.7 PLV). Geostatic pressure (PG): That pressure in the liquid below a seal which is the sum of the pressure...


Experience in Study and Prediction of Zones of Brine Shows

A. M. Novokshchenov

Petroleum Geology: A Digest of Russian Literature

.... Plastic salt flow from the increase in lithostatic pressure in lows from the action of geostatic pressure of the overlying rocks, and due to tectonic...


How Salt and Shale Flow: Unit 14: Principles

Martin P. A. Jackson, William E. Galloway

AAPG Special Volumes

.... By keeping the grains apart, the excess pore pressure counteracts the lithostatic (geostatic) load pressure and lowers the effective stress (effective...


Groundwater Upwelling, Near Bay St. Elaine Salt Dome in Southeastern Louisiana, as Inferred from Fluid Property Variations (1)


AAPG Bulletin

... defined as the ratio of fluid pressure to the lithostatic pressure (i.e., the pressure exerted by overlying solid grains and fluids...


Spatial Variations in Subsurface Pore Fluid Properties in a Portion of Southeast Louisiana: Implications for Regional Fluid Flow and Solute Transport

R. Brent Bray , Jeffrey S. Hanor

GCAGS Transactions

...). Pore fluid pressures were studied in terms of the dimensionless parameter, geostatic ratio (= fluid pressure/lithostatic pressure). Geostatic ratios were...


Determination of Phase State and Fluid Pressures in Closed Pores of Clayey Rocks

A. Kh. Makhmudov, Ye. A. Rogozina

Petroleum Geology: A Digest of Russian Literature

... pressure, i. e., pressure in the open pores, and Plit in lithostatic pressure. The correctness of the lower limit of inequality (1) is easily demonstrated...


Extreme Overpressures and Anomalous Fluid Densities from RFT Pressure Surveys in Papua New Guinea Wells: Some Results and Implications

B. Kota, D. Trattner, P. Woyengu, P. K. Webb

Papua New Guinea (PNG) Petroleum Convention Proceedings

... of the lithostatic load is borne by the formation fluid. In extreme cases, the formation pressure approaches geostatic, and the overburden load...


Use of Hydraulic Head and Hydraulic Gradient to Characterize Geopressured Sediments and Direction of Fluid Migration in Louisiana Gulf Coast: ABSTRACT

Jeffrey S. Hanor, Janet E. Bailey

AAPG Bulletin

... on the basis of increases in pressure gradient or geostatic ratio, i. e., in-situ fluid pressure divided by total depth. Fluids and sediments having...


Identification of Evaporite Diapirs Formed under the Influence of Horizontal Compression

W.M. Schwerdtner

CSPG Bulletin

...) Evaporite diapirs are known to rise buoyantly under either 1) lithostatic pressure alone or 2) the combined effects of horizontal tectonic compression...


Salt-Generated Structures of the Colorado Plateau and Possible Analogies: ABSTRACT

Wm. Lee Stokes

AAPG Bulletin

... compressional forces or perhaps under purely geostatic pressure, (2) stagnation or cessation of upward movement allowing uniform sedimentation across...


Some Causes of Anomalously High Formation Pressures

L. N. Kapchenko

Petroleum Geology: A Digest of Russian Literature

... to 95-100% of the geostatic) and are independent of the age of the rocks. In the presence of gas accumulations, such cases of excessive pressure...


Initial Formation Pressures in Pools with Lithologic Heterogeneity of the Pay Zones

V. F. Noval

Petroleum Geology: A Digest of Russian Literature

... of the Yasnopolyan Horizon The low formation pressures appear to be a consequence of several factors. The overall factor is the drop in geostatic pressure...



A. A. Orlov, V. G. Omelchenko, I. R. Mykhailiv, A. M. Trubenko

Search and

...: geostatic pressure and tetonic tension. The geostatic pressure in any point of sedimentary cover is equal to gravitational pressure of higher layers...


Hydrogeologic Conditions in Deep Paleogene Horizons of the Inner Zone of the Cis-Carpathian Downwarp (Lugi Area)

V. I. Baranovskiy, S. A. Makovskiy, A. F. Romanyuk, Ye. M. Shaparin

Petroleum Geology: A Digest of Russian Literature

... pressure. In the Paleogene sediments the geostatic pressure at a depth of 6000 m was 13,800 kg/cm2. Testing of the Menilitov sediments in the 6045-6080 m...


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

.... In a few pools the ratio of formation pressure to hydrostatic pressure (ka) is high; the formation pressure approaches the geostatic pressure. See...


Review of Conference on Hydrology of Deep Sedimentary Basins: GEOLOGIC NOTES

Parke A. Dickey , Paul H. Jones

AAPG Bulletin

...: geopressure, 12; geostatic, 0; lithostatic, 1; abnormal (abnormally high), 16; supernormal, 2; high pressure, 1; overpressure, 2; excess pressure, 2; super...


Formation of the Structural Plan of the Apsheron Oil-Gas Region

A. G. Durmish’yan

Petroleum Geology: A Digest of Russian Literature

... in the Miocene clays at the crest of the Binagady fold reached 60 mpa in late Pliocene time, whereas geostatic counter pressure of the middle and upper Pliocene...


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