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A new approach for flow simulation in complex hydraulic fracture morphology and its application:Fracture connection element method

引用

Petroleum Science 2023年第5期20卷 3002-3012页

作者： Guang-Long Sheng Hui Zhao Jia-Ling Ma Hao Huang Hai-Yang Deng Wen-Tao Zhan Yu-Yang Liu College of Petroleum Engineering Yangtze UniversityWuhan430100HubeiChina Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering(Yangtze University) Wuhan430100HubeiChina China National Offshore Oil Corporation-Hainan Haikou570100HainanChina CNOOC Research Institute Ltd. Beijing100020China

Efficient flow simulation and optimization methods of hydraulic fracture morphology in unconventional reservoirs are effective ways to enhance oil/gas *** on the connection element method(CEM)and distribution of stimulated reservoir volume,the complex hydraulic fracture morphology was accurately described using heterogeneous node connection *** a new fracture connection element method(FCEM)for fluid flow in stimulated unconventional reservoirs with complex hydraulic fracture morphology was *** the proposed FCEM,the arrangement of dense nodes in the stimulated area and sparse nodes in the unstimulated area ensures the calculation accuracy and *** key parameter,transmissibility,was also modified according to the strong heterogeneity of stimulated *** finite difference and semi-analytical tracking were used to accurately solve the pressure and saturation distribution between *** FCEM is validated by comparing with traditional numerical simulation method,and the results show that the bottom hole pressure simulated by the FCEM is consistent with the results from traditional numerical simulation method,and the matching rate is larger than 95%.The proposed FCEM was also used in the optimization of fracturing parameters by coupling the hydraulic fracture propagation method and intelligent optimization *** integrated intelligent optimization approach for multi-parameters,such as perforation number,perforation location,and displacement in hydraulic fracturing is *** proposed approach was applied in a shale gas reservoir,and the result shows that the optimized perforation location and morphology distribution are related to the distribution of porosity/*** the perforation location and displacement are optimized with the same fracture number,NPV increases by 70.58%,which greatly improves the economic benefits of unconventional *** work provides a new way for flow simulation and op

关键词： Unconventional reservoirs multi-fractured horizontal wells Complex fracture morphology Fracture connection element method Integrated optimization

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