Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir
This paper investigates the bottom-hole pressure (BHP) performance of a fractured well with multiple radial fracture wings in a coalbed methane (CBM) reservoir with consideration of stress sensitivity. The fluid flow in the matrix simultaneously considers adsorption–desorption and diffusion, whereas...
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MDPI AG
2020-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/15/3849 |
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| author | Zuhao Kou Haitao Wang |
| author_facet | Zuhao Kou Haitao Wang |
| author_sort | Zuhao Kou |
| collection | DOAJ |
| description | This paper investigates the bottom-hole pressure (BHP) performance of a fractured well with multiple radial fracture wings in a coalbed methane (CBM) reservoir with consideration of stress sensitivity. The fluid flow in the matrix simultaneously considers adsorption–desorption and diffusion, whereas fluid flow in the natural fracture system and the induced fracture network obeys Darcy’s law. The continuous line-source function in the CBM reservoir associated with the discretization method is employed in the Laplace domain. With the aid of Stehfest numerical inversion technology and Gauss elimination, the transient BHP responses are determined and analyzed. It is found that the main flow regimes for the proposed model in the CBM reservoir are as follows: linear flow between adjacent radial fracture wings, pseudo-radial flow in the inner region or Stimulated Reservoir Volume (SRV), and radial flow in outer region (un-stimulated region). The effects of permeability modulus, radius of SRV, ratio of permeability in SRV to that in un-stimulated region, properties of radial fracture wings, storativity ratio of the un-stimulated region, inter-porosity flow parameter, and adsorption–desorption constant on the transient BHP responses are discussed. The results obtained in this study will be of great significance for the quantitative analyzing of the transient performances of the wells with multiple radial fractures in CBM reservoirs. |
| first_indexed | 2024-03-10T18:10:07Z |
| format | Article |
| id | doaj.art-795f208170e74ef091f27b0992cec0dc |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T18:10:07Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj.art-795f208170e74ef091f27b0992cec0dc2023-11-20T08:12:00ZengMDPI AGEnergies1996-10732020-07-011315384910.3390/en13153849Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas ReservoirZuhao Kou0Haitao Wang1State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaThis paper investigates the bottom-hole pressure (BHP) performance of a fractured well with multiple radial fracture wings in a coalbed methane (CBM) reservoir with consideration of stress sensitivity. The fluid flow in the matrix simultaneously considers adsorption–desorption and diffusion, whereas fluid flow in the natural fracture system and the induced fracture network obeys Darcy’s law. The continuous line-source function in the CBM reservoir associated with the discretization method is employed in the Laplace domain. With the aid of Stehfest numerical inversion technology and Gauss elimination, the transient BHP responses are determined and analyzed. It is found that the main flow regimes for the proposed model in the CBM reservoir are as follows: linear flow between adjacent radial fracture wings, pseudo-radial flow in the inner region or Stimulated Reservoir Volume (SRV), and radial flow in outer region (un-stimulated region). The effects of permeability modulus, radius of SRV, ratio of permeability in SRV to that in un-stimulated region, properties of radial fracture wings, storativity ratio of the un-stimulated region, inter-porosity flow parameter, and adsorption–desorption constant on the transient BHP responses are discussed. The results obtained in this study will be of great significance for the quantitative analyzing of the transient performances of the wells with multiple radial fractures in CBM reservoirs.https://www.mdpi.com/1996-1073/13/15/3849coalbed methanemultiple transportation mechanismsmulti-wing fractured wellstress sensitivitystimulated reservoir volume |
| spellingShingle | Zuhao Kou Haitao Wang Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir Energies coalbed methane multiple transportation mechanisms multi-wing fractured well stress sensitivity stimulated reservoir volume |
| title | Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir |
| title_full | Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir |
| title_fullStr | Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir |
| title_full_unstemmed | Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir |
| title_short | Transient Pressure Analysis of a Multiple Fractured Well in a Stress-Sensitive Coal Seam Gas Reservoir |
| title_sort | transient pressure analysis of a multiple fractured well in a stress sensitive coal seam gas reservoir |
| topic | coalbed methane multiple transportation mechanisms multi-wing fractured well stress sensitivity stimulated reservoir volume |
| url | https://www.mdpi.com/1996-1073/13/15/3849 |
| work_keys_str_mv | AT zuhaokou transientpressureanalysisofamultiplefracturedwellinastresssensitivecoalseamgasreservoir AT haitaowang transientpressureanalysisofamultiplefracturedwellinastresssensitivecoalseamgasreservoir |