Pore pressure and in-situ stress magnitudes in the Bhiret Hammou hydrocarbon field, Berkine Basin, Algeria

被引:22
|
作者
Baouche, Rafik [1 ]
Sen, Souvik [2 ]
Ganguli, Shib Sankar [3 ]
机构
[1] Univ MHamed Bougara Boumerdes, Fac Hydrocarbons & Chem FHC, Dept Geophys, Lab Resources Minerals Energet, Boumerdes 35000, Algeria
[2] Geologix Ltd, Dynasty Bldg,Wing A,Level 4,Andheri Kurla Rd, Mumbai 400059, Maharashtra, India
[3] CSIR, Natl Geophys Res Inst, Uppal Rd, Hyderabad 500007, Telangana, India
关键词
In-situ stress; Pore pressure; Stress state; Bhiret Hammou field; Berkine basin; CO2-ENHANCED OIL-RECOVERY; PRESENT-DAY STATE; TECTONIC STRESS; CAMBAY BASIN; ROCK; EXPLORATION; PREDICTION; ANKLESHWAR; RESERVOIR;
D O I
10.1016/j.jafrearsci.2020.103945
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
A recently drilled exploratory well encompassing over 5 km of Mesozoic and Paleozoic sediments has been studied from the Bhiret Hammou field of the Berkine Basin, Algeria. Geophysical logs and downhole measurements have been integrated to ascertain rock strength, elastic properties, pore pressure and principal in-situ stress magnitudes. Vertical stress has an average 1.02 PSI/feet gradient in the studied field, as estimated from the density log. The Devonian shales are mildly over-pressured, while the Triassic and Carboniferous hydrocarbon reservoirs are in a hydrostatic pore pressure regime. Minimum and maximum horizontal stresses are quantified from a poroelastic strain model. The Sh gradient varies between 0.59 and 0.80 PSI/feet, whereas the S-H gradient is interpreted as 0.86-1.26 PSI/feet. Based on the relative stress magnitudes (S-H >= S-v>S-h), a present-day normal to strike-slip transitional tectonic regime is inferred.
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页数:10
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