Overpressures in the Taranaki Basin: Distribution, causes, and implications for exploration

Mark Webster, Stephen O'Connor, Bitrus Pindar, Richard Swarbrick

AAPG Bulletin

... measurements (drilling parameters and wireline log data such as sonic and resistivity) indicates the presence of three pressure zones: a near-hydrostatic...

Hydrodynamic effects on low-dip stratigraphic traps

S. A. Stewart

AAPG Bulletin

... with oil pooled in the anticline crest. The water leg is continuous across the structure and is hydrostatic (no hydraulic gradient). (B) Same...

Subsurface Pressure and Temperature Distributions: In Sacramento Basin, California

M. S. Lico, Y. K. Kharaka

Pacific Section of AAPG

... are hydrostatic to the top of the geopressured zone (pressure gradient >9.8 kPa/m). When the geopressured zone is encountered, pressure gradients become much higher...

Distribution and Mechanism Forming of Overpressure Shale Gumai on Jambi Subbasin, South Sumatera Basin

Randa Guruh Sumarsono, Hari Wiki Utama, Nurul Izzah Asral, Yudhi Achnopha, Yan Indryanto

Indonesian Petroleum Association

... on normal hydrostatic gradients. The excess pressure is caused by loading or unloading of sediments. To predict pore pressure values, the Eaton method...

Petroleum Source-Bed Evaluation of Tertiary Niger Delta: REPLY

C. M. Ekweozor , E. M. Daukoru

AAPG Bulletin

... in the Niger delta start with a transition zone of increasing fluid pressure gradient (FPG) over hydrostatic pressure gradient. Below the transition...

Generation and Migration of Petroleum from Abnormally Pressured Fluid Compartments (1)

JOHN M. HUNT

AAPG Bulletin

... to or from the surface. For example, in the Sullivans Lake field, Iberville Parish, Louisiana, normal hydrostatic pressure is found to a depth of about...

Utilization of Pressure Data Recorded While Perforating

Ronny Maas, Andon Suwito, Cholid Mas

Indonesian Petroleum Association

... the pressure exerted by the hydrostatic column of completion fluid. At this stage, completion fluid can be added or subtracted until the desired underbalance...

Geology of Jonah Field, Sublette County, Wyoming

D. P. DuBois, P. J. Wynne, T. M. Smagala, J. L. Johnson, K. D. Engler, B. C. McBride

AAPG Special Volumes

... increases by about 1 psi/ft of depth or more than twice the normal hydrostatic gradient. Pressure data suggest that migration of hydrocarbons...

Squeezing Out of Water from Clays in Reservoirs During Working of Oil-Gas Pools

A. A. Kuz’min, V. I. Uriman, Ye. P. Akent’yev

Petroleum Geology: A Digest of Russian Literature

... high porosity. Fluids have not been dispelled from the sediments. This phenomenon attends systems where formation pressure exceeds hydrostatic...

Burial and Thermal History of the Haynesville Shale: Implications for Overpressure, Gas Generation, and Natural Hydrofracture

Jeffrey A. Nunn

GCAGS Journal

... (Hubbert and Willis, 1957). Pore pressures in excess of hydrostatic pressure can be generated by disequilibrium compaction during rapid accumulation...

Abstract: Possible Oil Accumulation with Convex-Shaped OWC under Abnormally High Pressure Condition; Example from Offshore Sabah, Malaysia

Kazuo Nakayama

Geological Society of Malaysia (GSM)

...-depth gradients higher the expected hydrostatic gradient hydrocarbons. Nur Iskandar Taib 158 Warta Geologi, Vol. 36, No. 3, July–Sept 2010 Warta...

Petroleum System Characterization, Sinu Area (Offshore, Colombia)

J. Amaral, N. Crepieux, D. Levache, E. Cauquil, B. Mouly, C. Osorio

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... Cuencas Subandinas Figure 9 – Hydrostatic Case with monophasic gas column Figure 9 diagram shows that on the case of a hydrostatic pressure regime...

Source Maturity, Overpressures and Production, North West Shelf, Australia

E. L. Horstman

Petroleum Exploration Society of Australia (PESA)

... pressure- Through removal of overburden from a sealed reservoir; it equals the hydrostatic head of the eroded overburden, formerly contributing...

The Rafael gas-condensate discovery … a potential game-changer in the Canning Basin

Kurt Chambers

Australian Energy Producers Journal

... hydrostatic gradient (see Fig. 2). Appraisal plan The Rafael 1 gas-condensate discovery has fundamentally changed the geological model...

Rock Physics Guided Velocity Modeling and Reverse-Time Migration for Pore Pressure Prediction and Depth Imaging in Complex Areas

Nader C. Duta, Sherman Yang, Yangjun (Kevin) Liu, Lawrence Cho, Jie Cui

Indonesian Petroleum Association

... the rock physics template at some depth, which will lead to pore pressure below hydrostatic, an unphysical model. Figure 5b - (left) a cross-line...

Impossibility of Bernoulli Pressure Forces on Particles Suspended in Boundary Layers: REPLY

James M. Mattinson, Richard V. Fisher

Journal of Sedimentary Research (SEPM)

...Impossibility of Bernoulli Pressure Forces on Particles Suspended in Boundary Layers: REPLY James M. Mattinson, Richard V. Fisher 1970 Vol. 40 No. 1...

Two Practical Methods to Determine Pore Pressure Regimes in the Spraberry and Wolfcamp Formations in the Midland Basin

Mickey Friedrich, Gene Monson

Unconventional Resources Technology Conference (URTEC)

... and the end of job frac gradient in the Wolfcamp B, C, and D intervals, and this relationship is used to calculate a pseudo-pore pressure value for 5,398...

Primary Migration of Petroleum from Clay Source Rocks

Richard E. Chapman

AAPG Bulletin

... maintained between liquids and FOOTNOTE 3. A fluid potential gradient exists between two points in the subsurface at depths z1 and z2 when the pressure...

Comparing Overpressure in the West and East Natuna Basins

Julianta Parlindungan Panjaitan, Bobby Siswanto, Rizki Perdana Putra, Heru Putranto, Rita Achdiat

Indonesian Petroleum Association

... to the normal hydrostatic pressure gradient. Abnormal pore pressure generally refers to overpressure where the pore pressure is greater than the normal...

Shale Compaction and Abnormal Pressure Evaluation Application to the Offshore Mahakam

Michel Bois, Yves Grosjean, Louis de Pazzis

Indonesian Petroleum Association

... formation pressure and fracture gradient. Oil & Gas Journal, Zoeller, W.A., 1974. Rock properties determinated from drilling response. Petroleum...

Abstract: Origin of Subpressure and Hydrocarbon Exploration in Shiwu Fault Depression, Songliao Basin, China, by G. Zhou; #90984 (1994).

Search and Discovery.com

ABSTRACT: Coalbed Methane: Adsorptive Gas Storage Capacity of Coal Seams in the Upper Carboniferous of the Ruhr Basin, Germany

R. Gaschnitz, B.M. Krooss, R. Littke

The Society for Organic Petrology (TSOP)

... and the distance between lines of equal adsorption capacity broadens. Assuming a typical thermal gradient of 35 " C b and hydrostatic pressure gradient...

Geomechanical modeling of stresses adjacent to salt bodies: Part 1Uncoupled models

Gang Luo, Maria A. Nikolinakou, Peter B. Flemings, Michael R. Hudec

AAPG Bulletin

.... The models are uncoupled because pore pressure is assumed and not recalculated during the simulation. Dirkzwager and Dooley (2008) assumed hydrostatic...

Sandstone Geometries, Petrophysical Characteristics, and Pressure Regimes, Mesaverde Group, Green River Basin, Wyoming

Ronald C. Surdam

Wyoming Geological Association

..., Wyoming. Lower pressure gradient (line) is the regional hydrostatic pressure gradient (0.45 psi/ft.), whereas the upper pressure gradient (line...

Hydrocarbon Production During Underbalanced Drilling … A Mathematical Model to Predict Well Productivity

Samuel Zulkhifly Sinaga, Bonar Tua Halomoan Marbun

Indonesian Petroleum Association

... pressure than the formation pore pressure while drilling a well (Nellayappan et al., 2008). The hydrostatic head of the drilling fluid is intentionally...