Progress and research direction of shale oil development in Jiyang Depression,Shengli Oilfield
In order to realize the effective development of shale oil with low maturity in continental faulted basins in Jiyang Depres-sion,systematic evaluations have been carried out simultaneously in Boxing,Niuzhuang,and Minfeng sags since 2019,based on the 10 000 meters of systematic coring and more than 100 000 core tests.Significant breakthroughs have been made in single well evaluation and stereoscopic development of well groups.A pilot test of eight wells in three layers was conducted in Boxing Sag,and the first 100 000-ton shale oil development well group of SINOPEC was built.A large-platform stereoscopic development test of well groups was carried out with 20 wells in five layers,and all wells were put into production in Niuzhuang Sag.A comprehensive overall evaluation and stereoscopic development test was launched in Minfeng Sag,following the mode of"overall deployment of a large platform and step-by-step implementation of a small well group."Peak daily oil production exceeded one hundred tons in 28 wells,including Wells FYP1 and FY1-1HF ternary-element(storage,fracture,and pressure)storage and flow theory of shale oil in Jiyang Depression was proposed.The technologies of shale oil development,stereoscopic fine evaluation of development sweet spots,integrated modeling and numerical simulation,and stereoscopic development optimization were developed.A theoretical and technical system of stereoscopic development of shale oil in continental faulted basins with Shengli characteristics was initially con-structed.It effectively supported the construction of the shale oil national demonstration area in Jiyang Depression,Shengli Oilfield.
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