A Single Slurry System for Cementing Surface Casing in a Low Fracture Gradient Shallow Gas Area Off Shore Kalimantan

Amin Hartoni, Maman Helmana, Bruce Hobson, Robert Huizenga

Indonesian Petroleum Association

.... The average formation fracture gradient is 1.65 sg-MWE with a pore pressure of 1.05 sg-MWE. With this small pressure window the actual placement...

Diagenesis and pore pressure induced dim spots „ Advances on AVO analysis of high-impedance reservoirs

Antonio Pessoa, Mark Chapman, Giorgos Papageorgiou

International Meeting for Applied Geoscience and Energy (IMAGE)

... that the intercept and gradient relationship changed (at different rates) with pore pressure for all lithologies and fluid types at the top of the reservoir. Brine...

Nonhazardous Oil Field Waste Disposal into Subpressured Zones

S. A. Marinello, W. T. Ballantine, F. L. Lyon

Environmental Geosciences (DEG)

... hydrostatic gradient. Subpressured Zone Disposal There are specific advantages to disposal into a subpressured zone. Assume such a zone can...

Sleipner Fluid Dynamics; #80111 (2010)

Bert van der Meer

Search and Discovery.com

... ([email protected]) Key Point The pressure gradients are the main driving force for CO2 migration under hydrostatic, and therefore buoyant, conditions...

Role of Naturally Occurring Gas Hydrates in Sediment Transport

Richard D. McIver

AAPG Bulletin

..., the hydrostatic pressure decreases and some of the hydrate begins to decompose. The thickness of the hydrate affected would depend on the amount of lowering...

Geothermal Energy Potential Within the Los Angeles Basin and Its Co-Location With Solar and Wind Renewable Energy Resources; #80301 (2013)

William E. Glassley and Elise Brown

Search and Discovery.com

... Pressure  vs.  Depth  For  All  Wells   500 400 Pressure (bars) Lithostatic (3.7 m/bar) 300 200 100 Hydrostatic (10.0 m/bar) 0 0...

ABSTRACT: Relative Permeability Damage in Undersaturated Reservoirs

Monty E. Hoffman

Rocky Mountain Association of Geologists

...-Continent and Rocky Mountain regions are not in pressure equilibrium. They are hydrodynamic and underpressured, not hydrostatic and normal pressured. Recent...

ABSTRACT: Underpressured Gas Accumulations with Pressure Control at the Outcrop, by Philip Nelson; #90156 (2012)

Search and Discovery.com

Baseline/Calibration Method for Reservoir Pressure Determination

J.R. Adams, B. Dotson, H. Sebastian, S. Motealleh

Unconventional Resources Technology Conference (URTEC)

... to be under-pressured in which case the static bottomhole pressure is less than the hydrostatic pressure in the wellbore, producing a vacuum condition...

Behavior of Fluids in Oil Reservoirs

T. V. Moore

AAPG Bulletin

..., there is no pressure, hence no pressure gradient under which the oil may flow to wells. The oil remaining in the sand is immobile...

Argillaceous Rock Compaction and Primary Migration in the Mangnai Depression, Qaidam Basin, China

Chen Heli

Circum Pacific Council Publications

... gradient; the gradient, however, varies widely as high and low pressure areas alternate. The middle and lower parts of unit E3 and unit E3 beneath...

Well test results and reservoir performance for a carbon dioxide injection test in the Bass Islands Dolomite in the Michigan Basin

Joel Sminchak, Neeraj Gupta, Jacqueline Gerst

Environmental Geosciences (DEG)

.... This equates to a pressure gradient of 13.3 kPa/m, 35% above the hydrostatic pressure gradient. However, only a 414-kPa pressure increase was logged...

Mechanical Control of Annular Gas Flow, a Case Study and Way Forward Analysis

Guillaume Tarnaud, Philippe Essel, Jack Newberry, Franck Wendlinger, C.O. “Doc” Stokley

Indonesian Petroleum Association

... in the cement column being irregular and thus fluid loss from the slurry reduces hydrostatic pressure below the gelled regions as depicted in Figure 1...

Migration from Source to Trap: Chapter 3: PETROLEUM GENERATION AND MIGRATION

William A. England, Alastair L. Mann, David M. Mann

AAPG Special Volumes

.... The water fluid potential, W, is simply equal to the prevailing overpressure, i.e., the amount by which local water pressure exceeds hydrostatic pressure...

Direct evidence for abnormal overpressure generated by crude oil cracking in the Sinian Dengying Formation, Central Sichuan Basin, southwestern China

Yifan Song, Yong Chen, Tong Lin, Miao Wang, and Hui Tian

AAPG Bulletin

..., and lithostatic gradient can be used to obtain the hydrostatic pressure and lithostatic pressure. The internal pressure of type A FIA is between...

Present-day stress regime, permeability, and fracture stimulations of coal reservoirs in the Qinshui Basin, northern China

Shida Chen, Yafei Zhang, Dazhen Tang, Shu Tao, Yifan Pu, and Zhenhong Chen

AAPG Bulletin

... to 1.17 MPa/100 m (0.02 to 0.52 psi/ft) and is generally lower than the hydrostatic pressure gradient (0.98 MPa/100 m [0.43 psi/ft]). Only two...

Depths of Oil Origin and Primary Migration: A GEOLOGIST'S DISCUSSION--REPLY

Robert J. Cordell

AAPG Bulletin

... there was no thought of water rising from the bottom to the top of a swimming pool owing to its vertical pressure gradient. Obviously also...

Abstract: Analysis of Unconventional Reservoirs using New and Existing NMR Methods; #90172 (2014)

Derrick P. Green, Dragan Veselinovic

Search and Discovery.com

... msec used by the industry for low permeability reservoirs. Capillary pressure measurements can be extremely valuable in low permeability reservoirs...

Experimental and Empirical Observations Supporting ACapillary Model Involving Gas Generation, Migration and Seal Leakage For the Origin and Occurrence of Regional GasifersŽ

Stephen W. Burnie Sr., Brij B. Maini, Bruce R. Palmer, Kaush Rakhit

Rocky Mountain Association of Geologists

... (ft) and γg is the gas gradient (psi/ft). The gas (Nitrogen) gradient at 71˚ F and 13.5 psia is 0.002 psi/ft. Consider Figure 7b. The pressure...

Exploration Well Testing in Papua New Guinea

D. E. Corwin

Papua New Guinea (PNG) Petroleum Convention Proceedings

... absorbers to minimise impact to the pressure gauges upon perforating. A water cushion with hydrostatic pressure of 1000 psi less than estimated reservoir...

Compressibility and Brine Permeability of Reservoir and Seal of Pore Space Gas Storages; #42510 (2020)

Carlo Dietl, Jennifer Szech, Hansjörg Baumgartner, Eberhard Jahns

Search and Discovery.com

... to equilibrate until a stationary pressure gradient within the specimen is reached. As soon as equilibration is reached, the injection rate equals the output...

The rate of pressure dissipation from abnormally pressured compartments

Ann Muggeridge, Yafes Abacioglu, William England, Craig Smalley

AAPG Bulletin

... on the basin scale. It is shown that the pressure gradient in a typical hydrocarbon reservoir compartment will return to the hydrostatic gradient over...

Drilling Risks Associated with Hydraulic Fractures and Reactivating Faults due to High Mud Weight/Pore Pressure and Miti (Paper B13)

A. A. Bal, D. Maya, K. K. Kyi, R. Guha, M. I. Gabreldar, D. Abang Indi

Geological Society of Malaysia (GSM)

... balance between mud weight and pore pressure as well as fracture gradient was unexpectedly crossed, and its effects on the formation and drilling...

Overpressure, Normal Pressure, and Underpressure and Their Coexistence in the Anadarko Basin; #41003 (2012)

Philip H. Nelson

Search and Discovery.com

..., preventing re-establishment of a normal hydrostatic gradient. Thus, the present-day pressure regime of oil and gas reservoirs is the result of a series...

Effective stress constraints on vertical flow in fault zones: Learnings from natural CO2 reservoirs

S. J. Naruk, J. G. Solum, J. P. Brandenburg, P. Origo, and D. E. Wolf

AAPG Bulletin

... gradient for the Green River area (Figure 13) and hydrostatic fluid pressures. See text for further discussion. BGL = below ground level...