Fibrous Calcite Veins, Overpressures, and Primary Oil Migration: GEOLOGIC NOTE

Robert Stoneley

AAPG Bulletin

... of the overburden, and its pressure therefore exceeds normal hydrostatic pressure. Overpressuring is transitory. Over long periods of time, which may...

Geology and Diagenetic History of Overpressured Sandstone Reservoirs in the Venture Gas Field, Offshore Nova Scotia, Canada [Abstract]

Noguera, V.H., Jansa, L.F.

CSPG Bulletin

..., Jansa, L.F. 1990 174 174 Vol. 38 (1990) No. 1. (March) Overpressured formations with pressure gradients of nearly twice the normal hydrostatic...

The Effect of Unconformities and Subsequent Loading on Pore Pressure Profiles

Jakob Heller, Stephen O 'Connor, Andrew Emery, Ed Hoskin, Jack Lee, Chris Ward

Indonesian Petroleum Association

... pressure can maintain equilibrium with the hydrostatic (normal) pressure gradient, the shales are said to be normally compacting and the velocity...

Subsurface Formation Pressure Gradient vs. Slope: Perception and Pitfalls

Selim S. Shaker

GCAGS Transactions

...), transition (C), to the deeper geopressured (D). Reservoirs (sand) always carry a linear pressure trend parallel to the regional hydrostatic...

Abnormal Formation Pressure and Shale Porosity

Halfdan Carstens , Henning Dypvik

AAPG Bulletin

... of mostly normal hydrostatic pressures, except for a modest pressure buildup in the deeply buried Lower Cretaceous series. A rapid increase in fluid...

Hydrodynamic Trapping, Tilted Contacts and New opportunities in Mature Onshore Kutei Basin, East Kalimantan, Indonesia; #41060 (2012)

Usman Jauhari, Robhy Permana, Andre Wijanarko, and Amireno Soenoro

Search and Discovery.com

... acquired from water sand in east flank wells show 8.65 ppg which is higher than normal hydrostatic pressure, meanwhile those acquired from water sand...

Pore Pressure Prediction in Challenging Areas … Reducing Uncertainty by Understanding Rock BehaviourŽ; #40650 (2010)

Sam Green, Richard Swarbrick, Stephen O'Connor, Phill Clegg, David T. Scott, and Bitrus Pindar

Search and Discovery.com

... pressures to equilibrate to hydrostatic conditions. Depth Pore pressure prediction will reveal higher effective stress than valid for the current depth...

A Method of Estimating Formation Pressures from Gulf Coast Well Logs

Harold H. Ham

GCAGS Transactions

... of shale formations vary more or less uniformly with depth through zones of normal pressure. When abnormally pressured formations are encountered...

Abstract: Pressure Trends in Lower Viosca Knoll and Mississippi Canyon, Gulf of Mexico Deep Water: Implications for Seals, Column Heights and Hydrocarbon Migration

Bruce E. Wagner

Houston Geological Society Bulletin

... be encountered. Pore pressure is elevated above a "normal" hydrostatic trend at shallow sediment burial depths. Indications are that top seals form with as little...

Application of Formation Pressure in Evaluation and Risking of Prospect; #10654 (2014)

Arpita Mandal, Ankaj Sinha, Rupdip Guha, Alisha Mehra

Search and Discovery.com

... structure. Relationship of formation pressure to hydrostatic vis-à-vis interpreted structural spill from depth structure map was used to de-risk prospects...

Abstracts: 2-D Finite-difference Modelling of Pore-pressure Diffusion in Heterogeneous Anisotropic Porolelastic Media: Implications for Induced Microseismicity; #90173 (2015)

David W. Eaton

Search and Discovery.com

... ⎢ ∂x j ⎥ ⎣ ⎦ , (3) where p is the pressure perturbation (generally the deviation from hydrostatic conditions), Dij is the hydraulic-diffusivity...

Using Pressure Data to Build a Stratigraphic Framework in the Deepwater Ranggas Field, Kutai Basin … East Kalimantan

Ida Njoman Widya Dharmasamadhi, Sena W. Reksalegora

Indonesian Petroleum Association

... of the shales above normal hydrostatic pressure. Where shales are more widespread, the overpressure signature can be identified over a broader area...

Permeability and Effective Stress: GEOLOGIC NOTES

M. D. Zoback , J. D. Byerlee

AAPG Bulletin

... on permeability than does confining pressure. When permeability is measured normal to the bedding planes (Fig. 2) for a constant pore pressure (along any...

Geo-Fluid-Dynamic Characteristics of Hydrocarbon Pools of Karachaganak Field

V. V. Larichev

Petroleum Geology: A Digest of Russian Literature

... interval. See figure 2. Actual formation pressures are very close to normal hydrostatic pressure. This indicates the potential possibility for upward...

Abstracts: Lateral and Vertical Variations in the Montney Formation, Northeast British Columbia; #90173 (2015)

John M. Behr, Steven A. Aitken, Craig Smith

Search and Discovery.com

...-grained clastic deposits, low porosity and permeability, elevated pressure, and high gas saturation. However, important properties such as hydrostatic...

Carbon storage and CO2-enhanced oil recovery potential in the Temblor Formation, northeast McKittrick oilfield, San Joaquin Valley, California

Kelly J. Harrington and Janice M. Gillespie

Environmental Geosciences (DEG)

... to fractional hydrostatic values using equation 5. Normal hydrostatic pressure is determined by multiplying the total depth of the well bore from...

Thickness of Removed Sedimentary Rocks, Paleopore Pressure, and Paleotemperature, Southwestern Part of Western Canada Basin

Kinji Magara

AAPG Bulletin

... are possible because shale compaction is related to overburden load or burial depth, if pore pressure is normal or hydrostatic. Hydrostatic pressure...

Geological Aspects of Abnormal Reservoir Pressures in Gulf Coast Louisiana

George Dickinson

AAPG Bulletin

.... The abrupt increase in pressure above normal hydrostatic pressure commonly occurs over a very short vertical interval which makes control difficult...

Pore Pressure Prediction Using Seismic and Well Data with Eaton Method and Neural Network in Carbonate Reservoir, "P" Gas Field, North Sumatra

Panji Satio Hutomo, Farizi Hilman Ramadhan, Rizky Achmad Kurnia, Pradityan Febri Yudhistira, M. Wahdanadi Haidar

Indonesian Petroleum Association

..., 2011). In general, abnormal pressures are then characterized by any departure from the normal trend line (Fertl, 1976). Hydrostatic pressure known...

Early Devonian Gas in Northern West Virginia and Pre-Devonian Oil Prospects: DISCUSSION

Stanley C. Herold

AAPG Bulletin

... or impervious rocks doubtfully explain the situation. To be sure, a pressure of 3,200 pounds per square inch can only exceed the normal hydrostatic head...

The Geological Significance of Abnormal Pressures in Oil and Gas Wells: Abstract

Parke A. Dickey

Tulsa Geological Society

... with pressures substantially higher or lower than normal hydrostatic because the aquifer outcrops at a higher or lower elevation than...

Pore Pressure Configuration in Balikpapan Bay Area

Hendry Setiawan Lie, Oddy Adnan Mudatsir, Novrianto Pamilwa Citajaya, Sigit Arisetiadi Umri, Benyamin Sapiie

Indonesian Petroleum Association

...s the compartmentalization concept. In the north structure, the pressure data point shows a normal hydrostatic trend. Otherwise, in the centra...

Post-Drill Analysis Of Pore Pressure And Fracture Gradient From Well Logs And Drilling Events – An Integrated Case Study Of A High Pressure Exploratory Well From Panna East, Mumbai Offshore Basin, India

Search and Discovery.com

Abstract: The behaviour of quaternary debris flows on the northeast Newfoundland slope

A. M. Mahgoub

Atlantic Geology

... high values of excess pore fluid pressure (approximately 0.7 to 2.5 times hydrostatic, depending on depth and sediment concentration). These high...

Exploration for Tectonically Shielded Oil Pools in the Volgograd Region

N. S. Trukhachev, M. S. Astaf’yeva, D. A. Babich, R. A. Petsyukha

Petroleum Geology: A Digest of Russian Literature

.... This is confirmed by the excess of the initial formation pressure above the hydrostatic pressure. The oils of these horizons are similar to one another...