Tectonic Events of the Cenozoic and Phase Differentiation of Hydrocarbons in Hauterivian-Cenomanian Complex of West Siberian Basin

V. S. Surkov, L. V. Smirnov

Petroleum Geology: A Digest of Russian Literature

... of the depression the system is open. Formation pressure in the system drops from normal hydrostatic in the south to negative values in the region of the Gyda...

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

JOZSEF TOTH, M. D. MACCAGNO, C. J. OTTO, and B. J. ROSTRON

AAPG Bulletin

... is different from the nominal hydrostatic pressure for that depth. The difference is termed the dynamic pressure increment, (delta)p. By definition, (delta)p...

Impact of the Stress State and the Natural Network of Fractures/Faults on the Efficiency of Hydraulic Fracturing Operations in the Goldwyer Shale Formation

Partha Pratim Mandal, Reza Rezaee, Joel Sarout

Australian Petroleum Production & Exploration Association (APPEA) Journal

... layer Increasing pore-pressure causes changes in vertical and horizontal stress magnitude Increasing pore-pressure reduces normal stress along...

Regional Top Seal Capacity Analysis in JS-1 Ridge, Offshore Madura Involving Seal Geometry, Capilary Seal, Hydrofracturing Analysis, and Natural Fracture Modelling

Khadafi, Agus M. Ramdhan, Riszky B. Risyad, Andri Akbar, Ghufron Fauzi

Indonesian Petroleum Association

... (psi/ft) Sv = Lithostatic pressure (psi/ft) Ph = Hydrostatic pressure (psi/ft) Δti = Sonic transit time (µs/ft) Δtn = Normal transit time sonic compacted...

Overpressured Reservoirs: A New Generation of Exploration Opportunities

Richard E. Swarbrick

Indonesian Petroleum Association

..., offshore Malaysia. AAPG Bulletin, v. 78, p. 1171. Overpressure, excess pore pressure above the hydrostatic pressure gradient, is found in a wide range...

Electric-Log Characteristics of Diapiric Shale

J. A. Gilreath

AAPG Special Volumes

... (that is, at hydrostatic pressure) and highly pressured shale, the resistivity decreases from approximately 1 ohm-m to 0.4 ohm-m. The acoustic velocity values...

Evaluation of Gippsland Basin Onshore Structures for Compressed Air Energy Storage

T McKinley, J Kirkland, D Wilson

Petroleum Exploration Society of Australia (PESA)

... with a hydrostatic pressure of 6.3 MPa. Computer simulation of injection and extraction of air from the aquifer under various combinations of horizontal...

Hydrodynamic Analysis of the Early Cretaceous Aquifers in the Barrow Sub-Basin in Relation to Hydraulic Continuity and Fault Seal

A. L. Hennig, J. R. Underschultz, C. J. Otto

Petroleum Exploration Society of Australia (PESA)

... and the Flag formations have normal (or close to hydrostatic) depth• dependent pressures within the water leg, even over a wide depth and pressure...

A New Pore Pressure Prediction Model for Naturally Fractured Shales and Stacked Plays: The Effect of Active Hydrocarbon Generation - A Powder River Basin Case Study

Daniel Orozco, Roberto Aguilera

Unconventional Resources Technology Conference (URTEC)

.... Normal to subnormal-pressure water-bearing reservoirs are usually found updip from the overpressured strata. Spencer (1987) indicates that the most...

Source Material, Compaction History and Hydrocarbon Occurrence in the Cagayan Valley Basin, Luzon, Philippines

Noe L. Caagusan

Southeast Asia Petroleum Exploration Society (SEAPEX)

... be dispersed through them. Normal Hydrostatic Pressure In a stress system, such as a layer of unconsolidated rock, when additional load or pressure...

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...

Wireline Pressures Detect Fluid Contacts, Ikan Pari Field, Natuna Sea

Pryo Hutomo, W. V. Jordan

Indonesian Petroleum Association

..., Conoco has found most all tested water sands to have a normal pressure gradient near 0.433 psi/ft, related to sea level datum. This paper discusses...

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)

.... These pressures identify the Wolfcamp as an overpressured reservoir since the pressure gradients are greater than that caused by a hydrostatic column...

Diamond Drilling Against High Gas Pressure in Turner Valley, Calgary, Alberta: GEOLOGICAL NOTES

J. Bilterijst

AAPG Bulletin

... (baroid) or some other suitable substance, or adding the needed pump pressure to the hydrostatic pressure of the circulating fluid. This can be done...

Experimental and Empirical Observations Supporting a Capillary Model Involving Gas Generation, Migration, and Seal Leakage for the Origin and Occurrence of Regional Gasifers

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

AAPG Special Volumes

.... At this point, the gasifer is developed. The transition stage has normal and underpressured gas, with tall columns that crosscut waterlines on pressure...

Physico-Chemical Factors Affecting the Solubility of Calcium Carbonate in Sea Water

Roger Revelle

Journal of Sedimentary Research (SEPM)

..., hydrostatic pressure, and carbon dioxide content. Although the experimental results obtained by various workers for the solubility product...

Oil-Gas Potential of the Sub-Salt Sediments of the Western Peri-Caspian Area

V. A. Grigorov, I. A. Mitalev, O. I. Serebryakov

Petroleum Geology: A Digest of Russian Literature

... study of Shiryayev well 5. At a depth of 4 km the formation pressure is 630 kgs/cm2; this exceeds normal hydrostatic pressure by 40-50%. Formation...

Abstract: Capillary Sealing Mechanism in the Southern Anadarko Basin, Oklahoma, USA; #90063 (2007)

Search and Discovery.com

Preservation of Oil During Erosion of Reservoir Rocks: DISCUSSION

L. C. Case

AAPG Bulletin

... there could be no hydrostatic pressure on the gas. There might even be a partial vacuum." This last statement is true only if the formation...

The Determination of Seal Capacities for Highly Pressured HP/HT Traps: A Best-PracticeŽ Workflow

Stephen O'Connor, Richard Swarbrick, Richard Lahann, Alexander Edwards, David Scott, Sam Green

Indonesian Petroleum Association

..., and using a hydrostatic gradient of 0.445 psi/ft (10.06 MPa/km), this gives a buoyancy pressure of 73 psi (0.5 MPa). The incorporation of the buoyancy...

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...

Examples of Fault Architecture and Clay Gouging in Neogene Clastics of the Miri Area, Sarawak

Franz L. Kessler, John Jong

Geological Society of Malaysia (GSM)

... gradient in Figure 14 represents hydrostatic pressure gradient, the green line a moderately elevated pressure gradient. Hard overpressures, when developing...

Geodynamic Modeling of Sedimentation-induced Overpressure, Gravitational Spreading, and Deformation of Passive Margin Mobile Shale Basins

Markus Albertz, Christopher Beaumont, Steven J. Ings

AAPG Special Volumes

... and below depth d, the Hubbert-Rubey pore-fluid-pressure ratio represents what are to be assumed to be hydrostatic (HR = h) and overpressured conditions (HR...

The Impact of Overpressure as Sealing Capacity in a Fractured Basement Reservoir, South Sumatera Basin

Aiman Haidar Shamlan, Fariz Kustama Kadafi Loudoe, Eko Laksono, Iin Muhsinah, Mochammad Syaifuddin, Mohamad Amin Ahlun Nazar

Indonesian Petroleum Association

...). This method is widely applied to predict pore-pressure in normally compacted sediment. The sonic log is used to create Normal Compaction Trend (NCT...

Petroleum Geology of Young Regressive Sequences

Richard E. Chapman

Southeast Asia Petroleum Exploration Society (SEAPEX)

... Asia, shows that normal hydrostatic pressures exist down to some depth below which they increase towards the overburden (or geostatic) pressure (Fig.4...