Optimization method of fracturing fluid volume intensity for SRV fracturing technique in shale oil reservoir based on forced imbibition:A case study of well X-1 in Biyang Sag of Nanxiang Basin,China  

作　　者：JIANG Tingxue SHEN Ziqi WANG Liangjun QI Zili XIAO Bo QIN Qiuping FAN Xiqun WANG Yong QU Hai 

机构地区：[1]Sinopec Key Laboratory of Drilling Completion and Fracturing of Shale Oil and Gas,Beijing 102206,China [2]State Center Research and Development of Oil Shale Exploitation,Beijing 102206,China [3]State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,Beijing 102206,China [4]Sinopec Research Institute of Petroleum Engineering Co.,Ltd.,Beijing 102206,China [5]Sinopec Henan Oil-field Company,Nanyang 473132,China [6]Chongqing University of Science and Technology,Chongqing 401331,China

出　　处：《Petroleum Exploration and Development》2024年第3期674-683,共10页石油勘探与开发（英文版）

摘　　要：An optimization method of fracturing fluid volume strength was introduced taking well X-1 in Biyang Sag of Nanxiang Basin as an example.The characteristic curves of capillary pressure and relative permeability were obtained from history matching between forced imbibition experimental data and core-scale reservoir simulation results and taken into a large scale reservoir model to mimic the forced imbibition behavior during the well shut-in period after fracturing.The optimization of the stimulated reservoir volume(SRV)fracturing fluid volume strength should meet the requirements of estimated ultimate recovery(EUR),increased oil recovery by forced imbibition and enhancement of formation pressure and the fluid volume strength of fracturing fluid should be controlled around a critical value to avoid either insufficiency of imbibition displacement caused by insufficient fluid amount or increase of costs and potential formation damage caused by excessive fluid amount.Reservoir simulation results showed that SRV fracturing fluid volume strength positively correlated with single-well EUR and an optimal fluid volume strength existed,above which the single-well EUR increase rate kept decreasing.An optimized increase of SRV fracturing fluid volume and shut-in time would effectively increase the formation pressure and enhance well production.Field test results of well X-1 proved the practicality of established optimization method of SRV fracturing fluid volume strength on significant enhancement of shale oil well production.

关 键 词：shale oil horizontal well volume fracturing forced imbibition fracturing fluid intensity parameter optimization 

分 类 号：TE357[石油与天然气工程—油气田开发工程]