Exploring Basin-Scale Relations and Unsupervised Classification to Quantify and Automate the Definition of Assessment Units in USGS Continuous Oil and Gas Resource Assessments

Chilisa M. Shorten, Scott A. Kinney, Katherine J. Whidden

International Meeting for Applied Geoscience and Energy (IMAGE)

..., temperature gradient, temperature at base of formation, barrels of oil equivalent (BOE) from cumulative production, depth pressure ratio (DPR), and excess...

Abstract: High pressure situations: understanding reservoir compartmentalization in the Sable Sub-basin

Carla H. Skinner, Grant D. Wach, Juan C. Wong

Atlantic Geology

... in Jurassic and Early Cretaceous reservoirs, where they increase with depth in unpredicted increments from hydrostatic to immense excess pressure. This study...

Distribution of Overpressure and its Prediction in Saurashtra Dahanu Block, Western Offshore Basin, India, #40730 (2011)

Kanak R. Nambiar, B.K. Singh, R.N. Goswami, K.R.K. Singh

Search and Discovery.com

... pressure exceeds that of a hydrostatic pressure gradient at specific depth (Osborne and Swarbrick, 1997). They have been studied in detail in geophysics...

Reservoir Knowledge and Drilling - Benefits Comparison for Underbalanced and Managed Pressure Drilling Operations

Doug Finley, Sara Shayegi, Joe Ansah, Isabel Gil, Randy Lovorn

Indonesian Petroleum Association

... the pressure in the formation being drilled, the operation shall be considered “underbalanced drilling”. The hydrostatic head may be naturally less than...

Applying Rock Physic Models for Optimized Pore Pressure Prediction

Joel K. Loeffler, Sam Green, Jakob Heller, Lev Vernik

GCAGS Transactions

... mechanisms (Bowers, 1994). Substituting hydrostatic pressure for pore pressure in the Terzaghi equation (1943), results in the normal vertical effective...

Estimation of Recovery Efficiency by Visual Observation of Pore Systems in Reservoir Rocks: REPLY

N. C. Wardlaw, J. P. Cassan

CSPG Bulletin

... equilibrium." Magara's argument is as follows: The capillary pressure gradient within a single globule of oil, which is trapped in a pore and which extends...

A Preliminary Examination of Geothermal Gradient Throughout Louisiana's 64 Parishes

Douglas Carlson, Richard P. McCulloh

GCAGS Transactions

... in the geopressured and hydropressured zones. The excess pressure above normal hydrostatic pressure that by definition characterizes the geopressured zone...

Cluster Efficiency-Based Stimulation: Real-Time Quantified Screenout Monitoring and Diversion Evaluation Through a Data Model Approach

Roman Korkin, Abdul Muqtadir Khan

Unconventional Resources Technology Conference (URTEC)

... and total wellhead pressures have been normalized to hydrostatic pressure ratio, velocity may be converted into a flow characteristic parameter...

Abstract: Simulation of Leaking Compartments Over Production Time Scales, by Yuqian Li, Joel S. Watkins, and Carrie L. Decker; #90914(2000)

Search and Discovery.com

Application of Formation Pressure in Evaluation and Risking of Prospect

Search and Discovery.com

Earthquakes and Fluid Injection

C. B. Raleigh

AAPG Special Volumes

... and Downes, 1966) resulted in hydraulic fracturing at a bottomhole pressure of about 5,200 psi, only slightly greater than the normal hydrostatic pressure...

Geothermal Energy Developments in the United States

Carel Otte

Indonesian Petroleum Association

.... This heat flow occurs everywhere but we are not normally aware of this. The normal geothermal gradient is about 3 degrees F. per 100 feet...

The Importance of Recognizing Hydrodynamics for Understanding Reservoir Volumetrics, Field Development and Well Placement; #41314 (2014)

Sam Green, Richard E. Swarbrick, and Stephen A. O'Connor

Search and Discovery.com

... pressures at depth where they exceed the hydrostatic pressure gradient. Care must be taken that overpressure values are from the same aquifer...

Hydrogeology and the Distribution of Oil Pools, South-Central Saskatchewan

David C. Toop, J. Tóth

Williston Basin Symposium

.... A vertical pressure gradient less than hydrostatic indicates downward flow at the point of observation, whereas a gradient...

Hydraulic fracturing during the formation and deformation of a basin: A factor in the dewatering of low-permeability sediments

John W. Cosgrove

AAPG Bulletin

... and escapes to the surface. The pore pressure increases by following the hydrostatic pressure gradient. As subsidence continues, however, the permeability...

STRUCTURALLY RELATED MIGRATION OF HYDROCARBONS IN THE CENTRAL APPALACHIAN BASIN OF EASTERN OHIO

Greg Mason, NGO Development Corp., Granville Rd., Newark, OH

Ohio Geological Society

... for compaction and is a large factor in primary migration. The hydrostatic pressure gradient is a large factor in secondary migration...

Incidence of Tectonic Stress on Overpressure Development in Ukrainian Basins

Alexander Orlov, Valery Omelchenko, Alexander Trubenko, Frdric Schneider

AAPG Special Volumes

... of a sedimentary layer (ka) is defined as the ratio of the pore-fluid pressure (Pf) to the conventional hydrostatic pressure, Ph = Patm + gz, expressed...

Estimating the Amount of Oil and Gas Accumulation from Top Seal and Trap Geometry

Fuminori Sawamura, Kazuo Nakayama

AAPG Special Volumes

...: Hydrostatic Trap-equilibrium EquationOver the geological timescale of hydrocarbon migration, only capillary-pressure properties are needed...

A Note on the Fluid Level Traps in the San Joaquin Valley

Charles D. Foss

Pacific Section of AAPG

... because the oil cannot migrate beyond the plane of zero hydrostatic pressure, in the same way the oil won’t come out of a well when it reaches this same...

Manage the Pressure„Drive the Results

Christopher James Bernard, Randy Lovorn, Derrick Lewis, Emad Bakri, Saad Saeed

Unconventional Resources Technology Conference (URTEC)

... of control of an automated MPD system is driven by the hydraulics equation: Wellhead Pressure = Desired Bottomhole - Hydrostatic - Friction (ECD...

Hydrodynamic Effects on Mission Canyon (Mississippian) Oil Accumulations, Billings Nose Area, North Dakota

Robert R. Berg , William D. DeMis , Alan R. Mitsdarffer

AAPG Bulletin

... water would exert a hydrostatic pressure of (200 ft × 0.465 psi/ft) = 93 psi. If a freshwater gradient were assumed, the pressure would be (200 ft...

Low pressure buildup with large disposal volumes of oil field water: A flow model of the Ellenburger Group, Fort Worth Basin, northcentral Texas

Shuang Gao, Jean-Philippe Nicot, Peter H. Hennings, Paul La Pointe, Katie M. Smye, Elizabeth A.Horne, and Robin Dommisse

AAPG Bulletin

... align with the expected hydrostatic pressure. Thus, the model was assumed to be normally pressured everywhere with a pressure reference point located...

Global Look at High Pressures: ABSTRACT

Raul A. Deju

AAPG Bulletin

...Global Look at High Pressures: ABSTRACT Raul A. Deju 1973 775 775 57 4. (April) Formation pressures higher than hydrostatic have been found in all...

Characteristics, evolution, and formation of pressure in the Sinian–Cambrian gas reservoirs of the Anyue gas field, Sichuan Basin, China

Zeqing Guo, Wenzhi Zhao, Guoqi Wei, Long Wen, Wuren Xie, Zengye Xie, Chunlong Yang, and Xiaobo Wang

AAPG Bulletin

... PetroMod software. The results show that there were three stages in the evolution of pore pressure in the Dengying Formation: a hydrostatic-pressure stage...

6.0 Comments on Previous Chapters

P. E. Gretener

AAPG Special Volumes

... of pressure and stress. Note that the units for both parameters are the same. The distinction between pressure (hydrostatic stress, since it prevails...