陆相湖盆页岩油储层形成演化过程与成因机制
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1.Numerical investigation on the influence of inter-well stress interference on hydraulic fracture propagation in shale formation
- 关键词:
- Hydraulic fracturing;Horizontal wells;Shale;Infill drilling;Rock mechanics;% reductions;Fracture length;Fracture propagation;Fracturing operations;Hydraulic fracture propagation;Infill wells;Numerical investigations;Shale formation;Two dimensional model;Unconventional reservoirs
- Cui, Zhuang;Hou, Bing;Fu, Shihao
- 《55th U.S. Rock Mechanics / Geomechanics Symposium 2021》
- 2021年
- June 18, 2021 - June 25, 2021
- Houston, Virtual, TX, United states
- 会议
Unconventional reservoir is efficiently exploited through horizontal wells with hydraulic fracturing operation. However, the continuous reduction of well space and the increase of infill wells have resulted in serious inter-well stress interference. Clarifying the mechanism of inter-well stress interference is of great significance to the efficient development of shale reservoirs. In this study, a two-dimensional model of fracture propagation was established. The influence of fracturing methods, cluster distance and well space on fracture propagation was investigated. The results showed that (1) Inter-well stress interference inhibits the lateral propagation of fractures, but sequential fracturing is more conducive to fracture propagation than simultaneous fracturing; (2) As the cluster distance increases, the fracture deflection angle decreases, the inter-well stress interference is weakened, and the fractures tend to propagate laterally. In the process of sequential fracturing, the influence of cluster distance on the inter-well stress interference is less than that of synchronous fracturing; (3) With the continuous increase of well space, the phenomenon of stress interference between wells gradually decreases and the fracture length gradually increases. The increase rate of the total fracture length of synchronous fracturing is greater. The results could provide theoretical guidance for the fracturing parameters optimization. © 2021 ARMA, American Rock Mechanics Association.
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