期刊
NATURAL RESOURCES RESEARCH
卷 30, 期 1, 页码 463-478出版社
SPRINGER
DOI: 10.1007/s11053-020-09731-2
关键词
In situ stress; Pore pressure; Depletion; Stress path; Reservoir geomechanics; Badri field
资金
- Polish National Agency for Academic Exchange (NAWA) [PPN/ULM/2019/1/00305/U/00001]
The study found that the stress state in the Badri field exhibits normal faulting tectonic characteristics, but the current depletion rate is unlikely to induce normal faulting or fault reactivation.
A reservoir geomechanical modeling has been attempted in the hydrocarbon-bearing Miocene formations in the offshore Badri field, Gulf of Suez, Egypt. Pore pressure established from the direct downhole measurements indicated sub-hydrostatic condition in the depleted mid-Miocene Hammam Faraun and Kareem reservoirs. Vertical stress (S-v) estimated using bulk density data yielded an average of 0.98 PSI/feet (22.17 MPa/km) gradient. Magnitudes of minimum (S-hmin) and maximum (S-hmax) horizontal stresses were deduced from the poro-elastic model. Relative stress magnitudes (S-v >= S-hmax > S-hmin) reflect a normal faulting tectonic stress in the Badri field. Pore pressure and stress perturbations (Delta PP and Delta S-h) in the depleted reservoirs investigated from actual measurements recognized 'stress path' values of 0.54 and 0.59 against the Hammam Faraun and Kareem Formations, respectively. These stress path values are far away from the normal faulting limit (0.68), indicating induced normal faulting or fault reactivation to be unlikely at the present depletion rate.
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