Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model
Abstract As an unconventional resource, tight oil reservoirs hold abundant geological reserves and great development potential. However, tight oil reservoirs suffer from high heterogeneity and low permeability. To obtain commercial oil and gas flow, multistage hydraulically fractured horizontal well...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-10-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.379 |
| _version_ | 1828856977644584960 |
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| author | Yu‐long Zhao Ling‐fu Liu Lie-hui Zhang Xu‐Yang Zhang Bo Li |
| author_facet | Yu‐long Zhao Ling‐fu Liu Lie-hui Zhang Xu‐Yang Zhang Bo Li |
| author_sort | Yu‐long Zhao |
| collection | DOAJ |
| description | Abstract As an unconventional resource, tight oil reservoirs hold abundant geological reserves and great development potential. However, tight oil reservoirs suffer from high heterogeneity and low permeability. To obtain commercial oil and gas flow, multistage hydraulically fractured horizontal well technology is often adopted. In this paper, an embedded discrete fracture model (EDFM) is adopted to study the fractured reservoir. First, the relationship between the EDFM connection list is studied and its coefficient matrix of the equation system is solved. EDFM connection list is a method to record the connections between the grids. Thereafter, the reasons for the sparsity of the coefficient matrix and the symmetry of the locations of nonzero elements in the matrix are explained, and a simple method to establish and assemble the coefficient matrix is proposed. Using this method, a simulator for tight oil reservoir with EDFM is developed. By comparing the simulation results of the self‐programming simulator with the commercial software SAPHIR, the usefulness of the simulator is verified. Finally, several simulations and sensitivity analysis are performed to determine the key factors affecting production. Modeling studies show the influence of fractures, the horizontal well, and stress sensitivity, providing very useful information for the design of hydraulic fracturing and production development programs. |
| first_indexed | 2024-12-13T01:27:47Z |
| format | Article |
| id | doaj.art-e1c02e3b683942c48196491d479a6702 |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-12-13T01:27:47Z |
| publishDate | 2019-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-e1c02e3b683942c48196491d479a67022022-12-22T00:04:06ZengWileyEnergy Science & Engineering2050-05052019-10-01751485150310.1002/ese3.379Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture modelYu‐long Zhao0Ling‐fu Liu1Lie-hui Zhang2Xu‐Yang Zhang3Bo Li4State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaCNPC Xinjiang Oil Field Branch Co Xinjiang ChinaGuangzhou Marine Geological Survey Guangzhou ChinaAbstract As an unconventional resource, tight oil reservoirs hold abundant geological reserves and great development potential. However, tight oil reservoirs suffer from high heterogeneity and low permeability. To obtain commercial oil and gas flow, multistage hydraulically fractured horizontal well technology is often adopted. In this paper, an embedded discrete fracture model (EDFM) is adopted to study the fractured reservoir. First, the relationship between the EDFM connection list is studied and its coefficient matrix of the equation system is solved. EDFM connection list is a method to record the connections between the grids. Thereafter, the reasons for the sparsity of the coefficient matrix and the symmetry of the locations of nonzero elements in the matrix are explained, and a simple method to establish and assemble the coefficient matrix is proposed. Using this method, a simulator for tight oil reservoir with EDFM is developed. By comparing the simulation results of the self‐programming simulator with the commercial software SAPHIR, the usefulness of the simulator is verified. Finally, several simulations and sensitivity analysis are performed to determine the key factors affecting production. Modeling studies show the influence of fractures, the horizontal well, and stress sensitivity, providing very useful information for the design of hydraulic fracturing and production development programs.https://doi.org/10.1002/ese3.379EDFMmultistage fractured horizontal wellnumerical simulationtight oil |
| spellingShingle | Yu‐long Zhao Ling‐fu Liu Lie-hui Zhang Xu‐Yang Zhang Bo Li Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model Energy Science & Engineering EDFM multistage fractured horizontal well numerical simulation tight oil |
| title | Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model |
| title_full | Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model |
| title_fullStr | Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model |
| title_full_unstemmed | Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model |
| title_short | Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model |
| title_sort | simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model |
| topic | EDFM multistage fractured horizontal well numerical simulation tight oil |
| url | https://doi.org/10.1002/ese3.379 |
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