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...

Pore pressure in sediments off the Sumatra accretionary margin

Search and Discovery.com

Derivation of Scaled Hydrocarbon Head Potential, A New Workflow for Petroleum System Analysis: Application to the Eagle Ford Formation, SE Texas, #10974 (2017).

Carlos E. Varady, Ursula Hammes, John Pantano

Search and Discovery.com

... ∆𝑃𝑜𝑣𝑒𝑟 = 𝑂𝑣𝑒𝑟𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒 ∆𝑃 𝐺 𝐻𝐶 = 𝐻𝑦𝑑𝑟𝑜𝑐𝑎𝑟𝑏𝑜𝑛 𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒 𝑔𝑟𝑎𝑑𝑖𝑒𝑛𝑡 *Pressure and Gradient difference taken with respect to hydrostatic © AAPG ACE 2017 - SHCHP - Varady, Hammes, Pantano 10 Implication within...

Role of Pressure in Smectite Dehydration--Effects on Geopressure and Smectite-to-Illite Transformation

Virginia A. Colten-Bradley

AAPG Bulletin

... (1.1°F/100 ft) and 40°C/km (2.2°F/100 ft) are given, The hydrostatic pressure gradient is assumed to be 0.465 psi/ft (10.52 kPa/m). End_Page 1421...

Water Expulsion from Clastic Sediments during Compaction--Directions and Volumes

Kinji Magara

AAPG Bulletin

..., the gradient of the excess pore-pressure (in excess of the hydrostatic pressure) within the shales between stage A and B must be determined. If the deposition...

Bekapai-11: An Example of Drilling a High Pressured Well in Weak Formations

Budi Suryodipuro

Indonesian Petroleum Association

... in drilling this zone stems from the fact that: the porous zones have a hydrostatic pressure the mud weight to be increased to hold the shales...

Underpressure in the northern Barents shelf: Causes and implications for hydrocarbon exploration

T. Birchall, K. Senger, M. T. Hornum, S. Olaussen, and A. Braathen

AAPG Bulletin

... pressure) is observed in the fault-bounded Mesozoic reservoirs of the Fingerdjupet subbasin. More severe (50 bar below hydrostatic pressure although...

Extended Abstract: The Zama Discovery in Salina del Istmo Basin, Offshore Tabasco: "New Dawn" for Offshore Mexico Exploration

David Kosmitis, Mike Albertson, Thomas Hall, John Parker, Michael C. Dix, Iain Drew, Mark G. Rowan

Houston Geological Society Bulletin

... the base-of-reservoir unconformity, while more subtle variations appear useful for intra-reservoir subdivision. After pressure-gradient data confirmed only...

The Zama Discovery in Salina del Istmo Basin, Offshore Tabasco: “New Dawn� for Offshore Mexico Exploration

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ABSTRACT: The Ordovician Tight Gas Reservoir of the Ahnet-Timimoun Basin; #90016 (2003)

Nasser Mokhtari

Search and Discovery.com

... that these reservoirs are abnormally under-pressured compared to the hydrostatic gradient. In regard to matrix permeability, the initial gas-flow rate...

Abstract: Estimating Heatflow in Frontier Basins Using Bottom Simulating Reflectors (BSRs): Implications for Deepwater Hydrocarbon Prospectivity Offshore MSGBC Basin, The Gambia; #90310 (2017)

Olawumi Owolabi, Mads Huuse, Jonathan Redfern, Ben Sayers

Search and Discovery.com

... gas zone beneath gives rise to the BSR due to the drop in velocity and density in the free gas zone. Knowing the BSR depth under hydrostatic 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)

... the data points that are at an approximately-hydrostatic pressure gradient, and with a compression index smaller than the one used in Step 2...

ABSTRACT: Pore Pressure Prediction for Deep Drilling in the Central Swamp Depobelt of the Niger Delta: Lessons for Deep Offshore Drilling; #90115 (2010)

Charles Ojo, James Ukandu, Joseph Ashiedu, Emma Tyler, and Montse Portet

Search and Discovery.com

... where the sediments display pore pressure close to hydrostatic pressure. (2) In the Eastern section from 2000 ms TWT down to about 3300 ms TWT...

A Theory Relating Isopachs to Paleocompaction Water - Movement in a Sedimentary Basin

Kinji Magara

CSPG Bulletin

... directions. The concepts described in this paper can apply in an area where the hydrostatic pressure condition prevails at present. The concept of unequal...

AAPG/Datapages Discovery Series No. 7, Multidimensional Basin Modeling, Chapter 7: Pore-Pressure-Dependent Fracture Permeability in Fault Zones: Implications for Cross-Formational Fluid Flow

Nunn, J. A.

AAPG Special Volumes

... are near hydrostatic (Hart et al., 1995). Unfortunately, the sparse pore-pressure data are not adequate to constrain the thickness of the pressure...

A Unified Model to Predict Flowing Pressure and Temperature Distributions in Horizontal Wellbores for Different Energized Fracturing Fluids

Zhengming Xu, Kan Wu, Xianzhi Song, Gensheng Li, Zhaopeng Zhu, Zhaoyu Pang

Unconventional Resources Technology Conference (URTEC)

... /s 0.03 ℃/m Values 5.3 MPa Geothermal gradient 25 ℃ Injection pressure Surface temperature 0.71 Predicted pressure and foam quality profiles by our...

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...

Formation Pressure Measurements and Their Use in Oil Exploration in the Kutubu Project, Papua New Guinea

Michael C. Daniels

Papua New Guinea (PNG) Petroleum Convention Proceedings

.... This gradient relates to the specific gravity (SG) of the formation fluid as defined by the follow­ ing formula: Correlations of pressure regimes...

Net Pay Cutoffs from Capillary Pressure; #120008 (2009)

Andy May

Search and Discovery.com

... on both sides of the tube is the same. This is the hydrostatic pressure. The gas in the left tube has a higher pressure which holds the heavier water...

Pore Pressures at Great Depths (5000 M and More) and their Variation from the Kura Depression to the West Turkmen Depression

K. M. Kerimov, D. A. Guseynova

Petroleum Geology: A Digest of Russian Literature

.... The hydrostatic pressure at this depth is 520 kPa 102, and pore pressure has a great range from 600 to 1050 kPa. 102. The excess pressure ranges from 150 to 450...

RELATIONSHIP OF TEMPERATURE TO RESERVOIR QUALITY FOR FELDSPATHIC  SANDSTONES OF SOUTHERN CALIFORNIA

S. A. DIXON and D. W. KIRKLAND

Fort Worth Geological Society

... of the geostatic pressure gradient. Extreme fluid pressure, i.e., fluid pressures approaching the geostatic, are generated only in exceptional...

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...

Podkamen Gas Field

A. E. Kontorovich

Petroleum Geology: A Digest of Russian Literature

.... The seal is a clayey-carbonate unit. The pool is a blanket-crest type. Formation pressure is anomalously high at 115% of the hydrostatic pressure...

Global Occurrence of Abnormal Formation Pressures: ABSTRACT

Walter H. Fertl

AAPG Bulletin

... as any departure from the normal hydrostatic pressure at any given depth. Abnormal subsurface pressure environments occur as shallow as only a few...

Gravity-Driven Consolidation of Granular Slurries--Implications for Debris-Flow Deposition and Deposit Characteristics

Jon J. Major

Journal of Sedimentary Research (SEPM)

... in pore-fluid pressure is equal to the change in total stress. When pore-fluid pressure is greater than hydrostatic, a fluid-pressure gradient...