Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation
Hydraulic fracturing has enabled production from unconventional reservoirs in the U.S., but production rates often decline sharply, limiting recovery factors to under 10%. This study proposes an optimization workflow for the CO<sub>2</sub> huff-n-puff process for multistage-fractured hor...
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MDPI AG
2024-10-01
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| author | Dung Bui Duc Pham Son Nguyen Kien Nguyen |
| author_facet | Dung Bui Duc Pham Son Nguyen Kien Nguyen |
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| description | Hydraulic fracturing has enabled production from unconventional reservoirs in the U.S., but production rates often decline sharply, limiting recovery factors to under 10%. This study proposes an optimization workflow for the CO<sub>2</sub> huff-n-puff process for multistage-fractured horizontal wells in the Wolfcamp A formation in the Delaware Basin. The potential for enhanced oil recovery and CO<sub>2</sub> sequestration simultaneously was addressed using a coupled geomechanics–reservoir simulation. Geomechanical properties were derived from a 1D mechanical earth model and integrated into reservoir simulation to replicate hydraulic fracture geometries. The fracture model was validated using a robust production history matching. A fluid phase behavior analysis refined the equation of state, and 1D slim tube simulations determined a minimum miscibility pressure of 4300 psi for CO<sub>2</sub> injection. After the primary production phase, various CO<sub>2</sub> injection rates were tested from 1 to 25 MMSCFD/well, resulting in incremental oil recovery ranging from 6.3% to 69.3%. Different injection, soaking and production cycles were analyzed to determine the ideal operating condition. The optimal scenario improved cumulative oil recovery by 68.8% while keeping the highest CO<sub>2</sub> storage efficiency. The simulation approach proposed by this study provides a comprehensive and systematic workflow for evaluating and optimizing CO<sub>2</sub> huff-n-puff in hydraulically fractured wells, enhancing the recovery factor of unconventional reservoirs. |
| format | Article |
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| publishDate | 2024-10-01 |
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| spelling | doaj-art-c83f789bc4e24f20b6e3e2dbbb58daf62025-08-20T02:53:37ZengMDPI AGFuels2673-39942024-10-015467369710.3390/fuels5040037Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A FormationDung Bui0Duc Pham1Son Nguyen2Kien Nguyen3New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801, USANew Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801, USADepartment of Petroleum Engineering, University of Houston, Houston, TX 77023, USAOffice of Institutional Research, The University of North Carolina at Pembroke, Pembroke, NC 28372, USAHydraulic fracturing has enabled production from unconventional reservoirs in the U.S., but production rates often decline sharply, limiting recovery factors to under 10%. This study proposes an optimization workflow for the CO<sub>2</sub> huff-n-puff process for multistage-fractured horizontal wells in the Wolfcamp A formation in the Delaware Basin. The potential for enhanced oil recovery and CO<sub>2</sub> sequestration simultaneously was addressed using a coupled geomechanics–reservoir simulation. Geomechanical properties were derived from a 1D mechanical earth model and integrated into reservoir simulation to replicate hydraulic fracture geometries. The fracture model was validated using a robust production history matching. A fluid phase behavior analysis refined the equation of state, and 1D slim tube simulations determined a minimum miscibility pressure of 4300 psi for CO<sub>2</sub> injection. After the primary production phase, various CO<sub>2</sub> injection rates were tested from 1 to 25 MMSCFD/well, resulting in incremental oil recovery ranging from 6.3% to 69.3%. Different injection, soaking and production cycles were analyzed to determine the ideal operating condition. The optimal scenario improved cumulative oil recovery by 68.8% while keeping the highest CO<sub>2</sub> storage efficiency. The simulation approach proposed by this study provides a comprehensive and systematic workflow for evaluating and optimizing CO<sub>2</sub> huff-n-puff in hydraulically fractured wells, enhancing the recovery factor of unconventional reservoirs.https://www.mdpi.com/2673-3994/5/4/37CO<sub>2</sub>-EOR huff-n-puffhydraulic fracturing simulationhydrodynamic–geomechanical coupled modelWolfcamp A formationoptimizing recovery of unconventional reservoir |
| spellingShingle | Dung Bui Duc Pham Son Nguyen Kien Nguyen Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation Fuels CO<sub>2</sub>-EOR huff-n-puff hydraulic fracturing simulation hydrodynamic–geomechanical coupled model Wolfcamp A formation optimizing recovery of unconventional reservoir |
| title | Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation |
| title_full | Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation |
| title_fullStr | Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation |
| title_full_unstemmed | Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation |
| title_short | Simulation-Based Optimization Workflow of CO<sub>2</sub>-EOR for Hydraulic Fractured Wells in Wolfcamp A Formation |
| title_sort | simulation based optimization workflow of co sub 2 sub eor for hydraulic fractured wells in wolfcamp a formation |
| topic | CO<sub>2</sub>-EOR huff-n-puff hydraulic fracturing simulation hydrodynamic–geomechanical coupled model Wolfcamp A formation optimizing recovery of unconventional reservoir |
| url | https://www.mdpi.com/2673-3994/5/4/37 |
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