Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran
Abstract The Asmari reservoir in southwest Iran has been producing oil continuously for over 50 years. However, due to an essential pressure decline, the reservoir is now a potential candidate for injection projects. The geomechanical analysis is essential for a successful injection operation to enh...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-09-01
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| Series: | Journal of Petroleum Exploration and Production Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13202-023-01695-2 |
| _version_ | 1797275751812169728 |
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| author | Narges Saadatnia Yousef Sharghi Jamshid Moghadasi Mohsen Ezati |
| author_facet | Narges Saadatnia Yousef Sharghi Jamshid Moghadasi Mohsen Ezati |
| author_sort | Narges Saadatnia |
| collection | DOAJ |
| description | Abstract The Asmari reservoir in southwest Iran has been producing oil continuously for over 50 years. However, due to an essential pressure decline, the reservoir is now a potential candidate for injection projects. The geomechanical analysis is essential for a successful injection operation to enhance reservoir production and address possible challenges. An accurate estimation of the injection pressure is necessary to maintain optimal conditions during the injection process and reduce possible risks. In this work, a coupled reservoir-geomechanical model, as well as rock mechanical tests, is performed to evaluate not only pressure variation and the associated in situ stress changes but also their potential influences on fault reactivation, reservoir–caprock stability, and surface displacement. For geomechanical evaluation, empirical correlations are derived between static and dynamic rock properties based on core data and existing petrophysical logs for the studied reservoir–caprock system. Based on the hydro-mechanical results, the maximum displacement is limited to the vicinity of the injection wells, where the highest pressure changes occur. The geomechanical analysis of the reservoir–caprock system shows that this system is stable until the injection pressure reaches 4.3× the initial reservoir pressure. Also, the injection pressure is not high enough to compromise the integrity of faults, indicating that the loading on the fault planes is too low to reactivate the pre-existing faults. The approach followed in this study can be applied to future field development strategies and feasibility considerations for CO2 sequestration and underground gas storage projects. |
| first_indexed | 2024-03-07T15:18:54Z |
| format | Article |
| id | doaj.art-5891077521a74d5485efb05cb537f641 |
| institution | Directory Open Access Journal |
| issn | 2190-0558 2190-0566 |
| language | English |
| last_indexed | 2024-03-07T15:18:54Z |
| publishDate | 2023-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj.art-5891077521a74d5485efb05cb537f6412024-03-05T17:45:31ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662023-09-01141598310.1007/s13202-023-01695-2Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest IranNarges Saadatnia0Yousef Sharghi1Jamshid Moghadasi2Mohsen Ezati3Faculty of Mining Engineering, Sahanad University of TechnologyFaculty of Mining Engineering, Sahanad University of TechnologyAhwaz Faculty of Petroleum, Petroleum University of Technology (PUT)Petroleum Engineering Department, SeaLand Engineering and Well Services (SLD)Abstract The Asmari reservoir in southwest Iran has been producing oil continuously for over 50 years. However, due to an essential pressure decline, the reservoir is now a potential candidate for injection projects. The geomechanical analysis is essential for a successful injection operation to enhance reservoir production and address possible challenges. An accurate estimation of the injection pressure is necessary to maintain optimal conditions during the injection process and reduce possible risks. In this work, a coupled reservoir-geomechanical model, as well as rock mechanical tests, is performed to evaluate not only pressure variation and the associated in situ stress changes but also their potential influences on fault reactivation, reservoir–caprock stability, and surface displacement. For geomechanical evaluation, empirical correlations are derived between static and dynamic rock properties based on core data and existing petrophysical logs for the studied reservoir–caprock system. Based on the hydro-mechanical results, the maximum displacement is limited to the vicinity of the injection wells, where the highest pressure changes occur. The geomechanical analysis of the reservoir–caprock system shows that this system is stable until the injection pressure reaches 4.3× the initial reservoir pressure. Also, the injection pressure is not high enough to compromise the integrity of faults, indicating that the loading on the fault planes is too low to reactivate the pre-existing faults. The approach followed in this study can be applied to future field development strategies and feasibility considerations for CO2 sequestration and underground gas storage projects.https://doi.org/10.1007/s13202-023-01695-2Fault activationSubsidenceAsmari reservoirHydro-mechanical model |
| spellingShingle | Narges Saadatnia Yousef Sharghi Jamshid Moghadasi Mohsen Ezati Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran Journal of Petroleum Exploration and Production Technology Fault activation Subsidence Asmari reservoir Hydro-mechanical model |
| title | Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran |
| title_full | Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran |
| title_fullStr | Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran |
| title_full_unstemmed | Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran |
| title_short | Coupled hydro-mechanical simulation in the carbonate reservoir of a giant oil field in southwest Iran |
| title_sort | coupled hydro mechanical simulation in the carbonate reservoir of a giant oil field in southwest iran |
| topic | Fault activation Subsidence Asmari reservoir Hydro-mechanical model |
| url | https://doi.org/10.1007/s13202-023-01695-2 |
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