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| Fluid-solid fully coupling flow simulation for SRV-fractured horizontal wells in tight oil reservoirs |
| REN Long1，2，SU Yuliang3，ZHOU Desheng1，2，ZHAN Shiyuan3，JING Cheng1，2，SUN Jian4 |
| (1. School of Petroleum Engineering，Xi?an Shiyou University，Xi?an，Shaanxi 710065，China；2. Shaanxi Key Laboratory of
Advanced Stimulation Technology for Oil and Gas Reservoirs，Xi?an Shiyou University，Xi?an，Shaanxi 710065，China；3. School of Petroleum Engineering，China University of Petroleum(East China)，Qingdao，Shandong 266580，China；4. School of Petroleum Engineering，China University of Petroleum(Beijing)，Beijing 102249，China) |
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Abstract In terms of the characteristic of complex fracture network and stress sensitivity for stimulated reservoir volume(SRV)-fractured horizontal wells in tight oil reservoirs，based on the effective stress principle and flowing features of stimulated areas with multi-porosity media，the fluid-solid coupling mathematical model considering the system characteristics of the matrix，natural fractures and network fractures is presented. The fully coupling numerical solution of the stress field and flow field is solved by the finite element method. The accuracy of this model is verified by comparing the existing software solution，analyzing the difference of the production performance of SRV-fractured horizontal well under the condition of the non-coupled and full-coupled model，and revealing the fluid flow characteristics and productivity influence factors of tight oil. The results show that for full-coupled model，the production rate of SRV-fractured horizontal well is large but declines quickly. There is an economically optimal reservoir fracturing parameter. And the development pattern of "well factory" involving horizontal wells with large scale SRV fracturing is more favorable for enhanced oil recovery(EOR). This study could provide a certain theoretical and technical guidance for the optimization design of horizontal wells with SRV fracturing and efficient development of tight oil reservoirs.
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2019, Vol. 38 
