Anomalous Pressures in the Deep Michigan Basin

Jean M. Bahr, Gerilynn R. Moline, and Gregory C. Nadon

AAPG Special Volumes

... the Glenwood and St. Peter to inhibit equilibration with normal pressures in the underlying and overlying units. Overpressures appear...

Abstract: Overpressuring and Hydrocarbon Expulsion, by D. W. Waples and A. Okui; #91012 (1992).

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Underpressure Distribution and Origin of the Tight Gas Reservoirs in Middle Jurassic J2sh Formation of the Central Sichuan Basin, Southwestern China

Qiaochu Wang, Dongxia Chen, Xianzhi Gao, Yi Zou

Unconventional Resources Technology Conference (URTEC)

... to the hydrostatic pressure at the same depth, abbreviated as Pcoe) ranging from 1.2 to 1.6 (Law and Spencer, 1998). However, underpressure is also...

Natural and Induced Fracture Orientation

M. King Hubbert

AAPG Special Volumes

... is about the same at any given depth as that of a hydrostatic column of water extending to the surface of the ground. Below this interval of normal pressure...

Development of Abnormal and Subnormal Pressures in Reservoirs Containing Bacterially Generated Gas

Colin Barker

AAPG Bulletin

... become considerably less than normal. For the system isolated at 1,000 ft (305 m), the pressure will be 2,590 psi (17.86 MPa) below hydrostatic after...

Production Testing: Part 9. Production Engineering Methods

David E. Lancaster

AAPG Special Volumes

... hydrostatic mud pressure (pihm) while going into the hole. The initial flow period (pif1 to pff1) is a short production period, usually only 5 to 10 min...

Geo-Fluid-Dynamic Aspects of Oil-Gas Accumulation in Sub-Salt Sediments of Central Siberian Craton

M. S. Kraychik, O. A. Baboshina

Petroleum Geology: A Digest of Russian Literature

... structures, b-negative structures. Formation pressure in the region varies over a wide range from normal to underpressure and overpressure. In spite...

Reply to Kinji Magara Including a Discussion of the Concept and Phenomenon of the "Tensiometer Effect" in Cross-Formational Gravity-Flow Systems of Formation Fluids: REPLY

Jozsef Toth

CSPG Bulletin

... this level the pressure is hydrostatic and increases downward at the normal hydrostatic rate: = g. Above this level and upward the pressure decreases Figure...

Calculated Compaction States of Thick Abnormally Pressured Shales

Richard S. Bishop

AAPG Bulletin

... into three zones--hydrostatic, transitional, and abnormal (or "super abnormal"). Although the transitional zone pressure is higher than hydrostatic...

Successful Use of Thixotropic Cement in Southern Sumatra-Case Histories

Sugiharto Imam Santoso, Memet Rachmat, R. Suryaman, Kusmono Sumarto

Indonesian Petroleum Association

... is in place. Cement fall back occurs when excessive hydrostatic pressure due to the higher density cement in the annulus breaks down the formation...

Stress Evolution Of Maari Field, Nz: Implications For Fault/Fracture Integrity, Stress Prediction, Infill Drilling And Borehole Integrity

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Experimental Assessment of Elastic Properties and Minimum Horizontal Stress in the Haynesville Shale-Gas Formation

Clotilde Chen Valdés, Zoya Heidari

Unconventional Resources Technology Conference (URTEC)

..., and hydrostatic pressure capacity of 137 MPa. Three sets of non-destructive experiments were conducted at each depth including hydrostatic stress...

Geo-Fluid Dynamic Conditions of the Sedimentary Cover of the Western Turan Platform

M. S. Kraychik

Petroleum Geology: A Digest of Russian Literature

... of hydrostatic gradient: I-provisional (0.01 mpa/m), II-normal (0.11 mpa/m). Where formation pressure is more than 5-10% greater than the normal...

Systematic Variations in Formation Pressures in the Mesozoic-Cenozoic Sediments of Eastern Cis-Caucasus

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

Petroleum Geology: A Digest of Russian Literature

... conditions of discharge of fluids and complete correspondence of formation and hydrostatic pressure. Interval II-II includes mainly the sediments of the Maykop...

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...

Abstract: Improved Pore Pressure Prediction by Integrating Basin Modeling and Seismic Methods, by H. M. Helset, M. Lüthje, and I. Ojala; #90091 (2009)

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Toward Understanding Over-Pressure in a Basin with Burial and Uplift: Preliminary Results of a Study Measuring Under-Compaction with DT Logs

Paul E. Devine

Unconventional Resources Technology Conference (URTEC)

... (Figure 1A). Normal compaction can be defined as porosity loss that occurs during overburden loading where pore pressure maintains a hydrostatic...

Fault Seal and Fault Stability Risk Assessments for Field Development Planning … Implications for Injection Pressures and Operational Procedures (Paper 10)

Adrian White, Jürgen Streit, Ralf Napalowski, Robin Hill

Geological Society of Malaysia (GSM)

... contemporary stress regime (Sbmin < Sv < SHmax) where the maximum horizontal stress is oriented approximately 120oN. Pore pressure is hydrostatic. Fault seal...

ABSTRACT: Geology and Genesis of Overpressured Sandstone Reservoirs in Venture Gas Field, Offshore Nova Scotia, Canada, by Lubomir F. Jansa and Victor H. Noguera; #91022 (1989)

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Simulation of Light Hydrocarbon Migration in a Stacked Petroleum Reservoir at Teapot Dome, Wyoming, with Pressurization During Carbon Dioxide Sequestration

Ronald W. Klusman

AAPG Special Volumes

... by a factor of seven for CH4 and a factor of three for n-C4H10 by increasing reservoir pressure from hydrostatic to 1.4 hydrostatic. Concentrations at the top...

Overpressure Mechanisms in Deep Drilling in Western Offshore India, #41074 (2012)

Rajeev Ranjan Kumar, Dhiresh Govind Rao

Search and Discovery.com

... Normal pressure is pore fluid pressure that equals the hydrostatic pressure of a column of formation water extending to the surface. Overpressure is pore...

High Pressure Shales and their Depositional Facies, Southern Louisiana Cenozoic: NOTES

Ervin G. Otvos, Jr.

Journal of Sedimentary Research (SEPM)

... and offshore Louisiana in order to gain information about the time and facies distribution of normal and high pressure shales. Wells in the entire...

Fluid Pressure in Porous Media -- Its Importance in Geology: A Review

P. E. Gretener

CSPG Bulletin

... is under the load of the overlying water column. Under such conditions the formation-fluid pressure is said to be NORMAL or HYDROSTATIC (Dickinson...

ABSTRACT: Critically-Stressed Faults, in Situ Stress and Fluid Flow - Contrasting the Gulf of Mexico with Other Regions of Active Faulting, by Mark D. Zoback; #91019 (1996)

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Optimizing Success Ratio of Formation Pressure Measurement by Measuring Pressure while Drilling at RR-015 Well, Bunyu Field, North Kalimantan, Indonesia

Reza Rahadian, Adhitya Pratama Lanadito, Fannopo Rikardo, Zeppy Irwanzah Budiarto

Indonesian Petroleum Association

... plot that did not follow the normal hydrostatic gradient. This technology has been proven to measure formation pressure succesfully in a thinly...