Mechanistic simulation of fracture effects on miscible CO2 injection
Miscible injection of carbon dioxide (CO2) into oil reservoirs as an Enhanced Oil Recovery (EOR) method has proved to be highly advantageous. According to the volume of the world's recoverable oil resides inside the fractured reservoirs, investigation of the controlling parameters in the effici...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-12-01
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| Series: | Petroleum Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2096249522000060 |
| _version_ | 1797960967723679744 |
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| author | Seyed Mohammad Hossein Hashemi Behnam Sedaee |
| author_facet | Seyed Mohammad Hossein Hashemi Behnam Sedaee |
| author_sort | Seyed Mohammad Hossein Hashemi |
| collection | DOAJ |
| description | Miscible injection of carbon dioxide (CO2) into oil reservoirs as an Enhanced Oil Recovery (EOR) method has proved to be highly advantageous. According to the volume of the world's recoverable oil resides inside the fractured reservoirs, investigation of the controlling parameters in the efficient injection of miscible CO2 is of paramount importance, mainly owing to the intricacies and complexities associated with this process. This complexity in fractured reservoirs arises due to the presence of two distinct media for fluid transfer (i.e., matrix and fracture network) and the corresponding differences in fluid velocities. Accordingly, performance of miscible carbon dioxide injection in these reservoirs was investigated through mechanistic simulation model in the form of dual-porosity (DP), and dual porosity-dual permeability (DPP). Moreover, due to limited supply and high injection costs of this gas in its pure form, performance of the miscible CO2 injection combined with C1, N2, and H2S was also surveyed and compared to pure gas injection case. A sensitivity analysis was also performed based on fracture porosity, fracture horizontal and vertical permeability, matrix horizontal permeability, block height shape factor, matrix capillary pressure, and impure injected components in DP and DPP models, showing that matrix horizontal permeability and capillary pressure have the greatest, and porosity has the lowest impact on miscibility performance and oil recovery in these models. In the end, after investigating the effect of different injection cases on miscibility performance and oil recovery, it was concluded that the highest oil recovery in miscible gas injection obtained through optimization of a gas composition having the lowest minimum miscibility pressure (MMP) and the lowest density. |
| first_indexed | 2024-04-11T00:52:08Z |
| format | Article |
| id | doaj.art-59ca7fe99c254eacb9c6dcfc8ba1b1ba |
| institution | Directory Open Access Journal |
| issn | 2096-2495 |
| language | English |
| last_indexed | 2024-04-11T00:52:08Z |
| publishDate | 2022-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Research |
| spelling | doaj.art-59ca7fe99c254eacb9c6dcfc8ba1b1ba2023-01-05T08:36:40ZengKeAi Communications Co., Ltd.Petroleum Research2096-24952022-12-0174437447Mechanistic simulation of fracture effects on miscible CO2 injectionSeyed Mohammad Hossein Hashemi0Behnam Sedaee1Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, IranCorresponding author.; Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, IranMiscible injection of carbon dioxide (CO2) into oil reservoirs as an Enhanced Oil Recovery (EOR) method has proved to be highly advantageous. According to the volume of the world's recoverable oil resides inside the fractured reservoirs, investigation of the controlling parameters in the efficient injection of miscible CO2 is of paramount importance, mainly owing to the intricacies and complexities associated with this process. This complexity in fractured reservoirs arises due to the presence of two distinct media for fluid transfer (i.e., matrix and fracture network) and the corresponding differences in fluid velocities. Accordingly, performance of miscible carbon dioxide injection in these reservoirs was investigated through mechanistic simulation model in the form of dual-porosity (DP), and dual porosity-dual permeability (DPP). Moreover, due to limited supply and high injection costs of this gas in its pure form, performance of the miscible CO2 injection combined with C1, N2, and H2S was also surveyed and compared to pure gas injection case. A sensitivity analysis was also performed based on fracture porosity, fracture horizontal and vertical permeability, matrix horizontal permeability, block height shape factor, matrix capillary pressure, and impure injected components in DP and DPP models, showing that matrix horizontal permeability and capillary pressure have the greatest, and porosity has the lowest impact on miscibility performance and oil recovery in these models. In the end, after investigating the effect of different injection cases on miscibility performance and oil recovery, it was concluded that the highest oil recovery in miscible gas injection obtained through optimization of a gas composition having the lowest minimum miscibility pressure (MMP) and the lowest density.http://www.sciencedirect.com/science/article/pii/S2096249522000060Naturally fractured reservoirCarbon dioxideMiscibilityImpuritySimulation |
| spellingShingle | Seyed Mohammad Hossein Hashemi Behnam Sedaee Mechanistic simulation of fracture effects on miscible CO2 injection Petroleum Research Naturally fractured reservoir Carbon dioxide Miscibility Impurity Simulation |
| title | Mechanistic simulation of fracture effects on miscible CO2 injection |
| title_full | Mechanistic simulation of fracture effects on miscible CO2 injection |
| title_fullStr | Mechanistic simulation of fracture effects on miscible CO2 injection |
| title_full_unstemmed | Mechanistic simulation of fracture effects on miscible CO2 injection |
| title_short | Mechanistic simulation of fracture effects on miscible CO2 injection |
| title_sort | mechanistic simulation of fracture effects on miscible co2 injection |
| topic | Naturally fractured reservoir Carbon dioxide Miscibility Impurity Simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2096249522000060 |
| work_keys_str_mv | AT seyedmohammadhosseinhashemi mechanisticsimulationoffractureeffectsonmiscibleco2injection AT behnamsedaee mechanisticsimulationoffractureeffectsonmiscibleco2injection |