Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran

Abstract Knowing the current condition of the faults and fractures in a reservoir is crucial for production and injection activities. A good estimation of the fault reactivation potential in the current stress field is a useful tool for locating the appropriate spot to drill injection wells and to c...

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Autores principales:	Majid Taghipour, Mohammad Ghafoori, Gholam Reza Lashkaripour, Nasser Hafezi Moghaddas, Abdullah Molaghab
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2019
Materias:	Asmari reservoir Fault reactivation 3D Mohr diagram Slip tendency Normal faulting regime Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/3aed57c262764ad78cca2a9d3682cc46
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spelling	oai:doaj.org-article:3aed57c262764ad78cca2a9d3682cc462021-12-02T10:29:06ZEstimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran10.1007/s12182-019-0331-91672-51071995-8226https://doaj.org/article/3aed57c262764ad78cca2a9d3682cc462019-06-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-0331-9https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Knowing the current condition of the faults and fractures in a reservoir is crucial for production and injection activities. A good estimation of the fault reactivation potential in the current stress field is a useful tool for locating the appropriate spot to drill injection wells and to calculate the maximum sustainable pore pressure in enhanced oil recovery and geosequestration projects. In this study, after specifying the current stress state in the Gachsaran oilfield based on Anderson’s faulting theory, the reactivation tendency of four faults (F1, F2, F3, and F4) in the Asmari reservoir is analyzed using 3D Mohr diagrams and slip tendency factors. Results showed that all the faults are stable in the current stress state, and F2 has the potential to undergo the highest pore pressure build-up in the field. On the other hand, F3 has the proper conditions (i.e., strike and dip referring to σ Hmax orientation) for reactivation. Stress polygons were also applied to show the effect of the pore pressure increase on fault stability, in a graphical manner. According to the results, the best location for drilling a new injection well in this part of the field is the NW side of F2, due to the lower risk of reactivation. It was found that both methods of 3D Mohr diagrams and slip tendency factors predict similar results, and with the lack of image logs for stress orientation determination, the slip tendency method can be applied. The results of such studies can also be used for locating safe injection points and determining the injection pressure prior to numerical modeling in further geomechanical studies.Majid TaghipourMohammad GhafooriGholam Reza LashkaripourNasser Hafezi MoghaddasAbdullah MolaghabKeAi Communications Co., Ltd.articleAsmari reservoirFault reactivation3D Mohr diagramSlip tendencyNormal faulting regimeScienceQPetrologyQE420-499ENPetroleum Science, Vol 16, Iss 3, Pp 513-526 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Asmari reservoir Fault reactivation 3D Mohr diagram Slip tendency Normal faulting regime Science Q Petrology QE420-499
spellingShingle	Asmari reservoir Fault reactivation 3D Mohr diagram Slip tendency Normal faulting regime Science Q Petrology QE420-499 Majid Taghipour Mohammad Ghafoori Gholam Reza Lashkaripour Nasser Hafezi Moghaddas Abdullah Molaghab Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran
description	Abstract Knowing the current condition of the faults and fractures in a reservoir is crucial for production and injection activities. A good estimation of the fault reactivation potential in the current stress field is a useful tool for locating the appropriate spot to drill injection wells and to calculate the maximum sustainable pore pressure in enhanced oil recovery and geosequestration projects. In this study, after specifying the current stress state in the Gachsaran oilfield based on Anderson’s faulting theory, the reactivation tendency of four faults (F1, F2, F3, and F4) in the Asmari reservoir is analyzed using 3D Mohr diagrams and slip tendency factors. Results showed that all the faults are stable in the current stress state, and F2 has the potential to undergo the highest pore pressure build-up in the field. On the other hand, F3 has the proper conditions (i.e., strike and dip referring to σ Hmax orientation) for reactivation. Stress polygons were also applied to show the effect of the pore pressure increase on fault stability, in a graphical manner. According to the results, the best location for drilling a new injection well in this part of the field is the NW side of F2, due to the lower risk of reactivation. It was found that both methods of 3D Mohr diagrams and slip tendency factors predict similar results, and with the lack of image logs for stress orientation determination, the slip tendency method can be applied. The results of such studies can also be used for locating safe injection points and determining the injection pressure prior to numerical modeling in further geomechanical studies.
format	article
author	Majid Taghipour Mohammad Ghafoori Gholam Reza Lashkaripour Nasser Hafezi Moghaddas Abdullah Molaghab
author_facet	Majid Taghipour Mohammad Ghafoori Gholam Reza Lashkaripour Nasser Hafezi Moghaddas Abdullah Molaghab
author_sort	Majid Taghipour
title	Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran
title_short	Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran
title_full	Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran
title_fullStr	Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran
title_full_unstemmed	Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran
title_sort	estimation of the current stress field and fault reactivation analysis in the asmari reservoir, sw iran
publisher	KeAi Communications Co., Ltd.
publishDate	2019
url	https://doaj.org/article/3aed57c262764ad78cca2a9d3682cc46
work_keys_str_mv	AT majidtaghipour estimationofthecurrentstressfieldandfaultreactivationanalysisintheasmarireservoirswiran AT mohammadghafoori estimationofthecurrentstressfieldandfaultreactivationanalysisintheasmarireservoirswiran AT gholamrezalashkaripour estimationofthecurrentstressfieldandfaultreactivationanalysisintheasmarireservoirswiran AT nasserhafezimoghaddas estimationofthecurrentstressfieldandfaultreactivationanalysisintheasmarireservoirswiran AT abdullahmolaghab estimationofthecurrentstressfieldandfaultreactivationanalysisintheasmarireservoirswiran
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Estimation of the current stress field and fault reactivation analysis in the Asmari reservoir, SW Iran

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