Journal of Petroleum Science and Technology

Journal of Petroleum Science and Technology

Evaluation of Faults Reactivation Tenacity in One of the Low-Pressure SW Iranian Carbonate Reservoirs: An IOR Viewpoint

Document Type : Research Paper

Authors
Mohsen Ezati 1
Mehran Azizzadeh 2
Mohammad Ali Riahi 3
Vahidoddin Fattahpour 4
Djavad Honarmand 1
1 Petroleum Geology Department, Upstream Oil Industry Research and Development Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
2 Petroleum Geology Dept. Center for Upstream Sci. & Tech. Research Institute of Petroleum Industry (RIPI)
3 Institute of Geophysics, University of Tehran, Tehran, Iran
4 School of Mining Engineering, University of Tehran, Tehran, Iran
10.22078/jpst.2020.3825.1605
Abstract
 
 In case of a decrease in reservoir pressure, injection projects are inevitable that the desired production rate is maintained. Moreover, one of the key issues in injection operations is optimum injection pressure determination to prevent fault reactivation . The aim of this study is to evaluate fault reactivation tenacity in one of SW Iranian oil fields at different injection stages. Two main steps in this study are geomechanical modeling and fault extraction. In addition, fullset data, image log, dipole sonic log, and MDT pressure points were used to construct the geomechanical model. Also, 3-D seismic data were used for fault extraction and characterization. Ultimately, according to the geomechanical model, the stress state is strike-slip normal, and the maximum horizontal stress direction is toward NE-SW. Furthermore, 18 faults have been extracted using seismic data, which their strikes are often NW-SE. In addition, the faults are inactive in the present-day stress state, but the first fault will be reactivated with a 33 MPa increase in pore pressure.
Keywords
Fault Reactivation
Geomechanical Modeling
Pore Pressure
Sarvak Formation
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Journal of Petroleum Science and Technology
Volume 10, Issue 1
Winter 2020
Pages 20-29