Determination of fractures distribution and horizontal insitu stress in one of the Persian Gulf oil fields using FMI image log

Document Type : Original Article

Authors

1 faculty of earth sciences, Shahrood University of Technology, Shahrood, Iran

2 Shahrood University of Technology, Shahrood, Iran

3 MSc. In petroleum engineering, Faculty of Mining, Petroleum & Geophysics Engineering, Shahrood University of Technology, Shahrood, Iran

Abstract

In hydrocarbon reservoirs of hard formations, hydrocarbon extraction and field development are strongly dependent on the geomechanical conditions of the reservoir, such as fractures and faults status and in-situ stress conditions. Image logs are powerful tools used to evaluate geomechanical conditions of hydrocarbon reservoirs in recent decades. In this study, using the FMI image log, which has a high resolution, coverage percentage and accuracy, the status of fractures, faults, and in-situ stress conditions of the upper Arab Formation in one of the Persian Gulf oil fields were investigated. Accordingly, 206 open fractures in 10 crashed zone with N60E-S60W domain trend and 96 closed fractures with two N45W-S45E and N50E-S50W trends in the Upper Arab Formation of well A were detected and based on the orientation, they mainly were categorized in longitudinal tensile fracture. Also, based on the observed induced fractures and breakouts, maximum and minimum horizontal stresses are oriented in N50E-S50W and N40W-S40E directions, respectively

Keywords

References

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History

  • Receive Date: 25 August 2021
  • Revise Date: 20 May 2022
  • Accept Date: 24 January 2022

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