Volume 19, Issue 2 (Summer 2025)
2025, 19(2): 224-245 |
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Haddad Tehrani M R, Talkhablou M, Asef M R, Ostad Hasan M. 3D modeling to determine the geomechanical parameters of the Asmari reservoir and the principal stresses in one of the fields in southwestern Iran. Journal of Engineering Geology 2025; 19 (2) :224-245
URL: http://jeg.khu.ac.ir/article-1-3151-en.html
URL: http://jeg.khu.ac.ir/article-1-3151-en.html
1- kharazmi uni.
2- kharazmi uni. ,Talkhablu@gmail.com
3- Daqing University, China
2- kharazmi uni. ,
3- Daqing University, China
Abstract: (550 Views)
Complex carbonate reservoirs, such as the Asmari Formation, present challenges to the accurate determination of geomechanical parameters and effective stresses due to high lithological and structural heterogeneity. The objective of this study is to develop a comprehensive three-dimensional model of geomechanical parameters and effective stresses in the Kupal oil field. Well log, core, and seismic data were used, and three-dimensional modeling was performed using the Sequential Gaussian Simulation (SGS) method based on variogram analysis. The prevailing stress regime was validated using FMI logs and wellbore breakout analysis. Additionally, a one-at-a-time sensitivity analysis was conducted on key parameters, including static Young’s modulus, Poisson’s ratio, cohesion, internal friction angle, and pore pressure. Results indicate that the maximum vertical effective stress (σv) is 87 MPa and the maximum horizontal effective stress (σHmax) is 127 MPa. Analysis of wellbore imaging data confirms a normal faulting stress regime (σv>σHmax>σhmin) in the field. Stress concentration around minor faults was also identified. The model was validated against one-dimensional models achieving 88% agreement. The findings of this study can be applied to well design, gas injection, and reservoir stability assessment in the Kupal field.
Keywords: Asmari reservoir, 3D geomechanical modeling, Sequential Gaussian Simulation, effective principal stress, sensitivity analysis, normal faulting regime.
Type of Study: Original Research |
Subject:
Geotecnic
Received: 2025/02/25 | Accepted: 2025/09/7 | Published: 2025/10/2
Received: 2025/02/25 | Accepted: 2025/09/7 | Published: 2025/10/2
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