Session 24. Oral Presentation for: Geomechanical risk assessment of injection test for a carbon storage site appraisal, offshore Northern Territory
Sadegh Asadi
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Sadegh Asadi received his PhD in Geomechanics from the Curtin University of Australia in 2010. Prior to joining Baker Hughes in 2011, he worked as a researcher at Curtin University. He has over 15 years’ experience with research, project management and consulting in various aspects of reservoir geomechanics. Sadegh is currently a regional Geomechanics Advisor with Baker Hughes, based in Perth, and is actively involved with SPE technical committees for conferences and workshops. |
Abstract
Presented on Thursday 23 May: Session 24
A geomechanical study has been conducted to assess the risk of formation fracturing and sanding during a water injection test. Considering the temperature difference between the storage formation and the injection fluid, the cooling effects could lead to a reduction of almost 15% in fracture initiation pressure (FIP). Notably, the FIP for perforations aligned with the maximum horizontal stress direction are lower than the minimum horizontal stress. While injection pressures surpassing FIP might trigger tensile fracturing in specific perforations, fracture propagation from the wellbore remains unlikely if the injection pressure remains below the field’s minimum horizontal stress. The pressure requirements for current envisaged matrix injection rates fall below the estimated FIPs. Consequently, the risk of formation fracturing during the injection test is deemed low. The propensity of sanding during flowback, considering a range of rock weakening and thermal effects of water injection, is also found to be low.
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Keywords: CCS site appraisal, Bonaparte Basin, fracture initiation pressure, injection cooling effects, matrix injection test, reservoir geomechanics, sand production prediction, thermal stress.
Sadegh Asadi received his PhD in Geomechanics from the Curtin University of Australia in 2010. Prior to joining Baker Hughes in 2011, he worked as a researcher at Curtin University. He has over 15 years’ experience with research, project management and consulting in various aspects of reservoir geomechanics. Sadegh is currently a regional Geomechanics Advisor with Baker Hughes, based in Perth, and is actively involved with SPE technical committees for conferences and workshops. |
