Oil shale in-situ conversion technology triggered by topochemical reaction method and pilot test project in Songliao Basin
China enjoys huge oil shale resources,and underground in-situ conversion is considered as an important approach to achieve clean and efficient utilization of oil shale resources.Specifically,the in-situ conversion technology triggered by topochemical reaction method(TSA method)is characterized by low energy input,fast heating and high oil recovery.In recent years,the process imple-mentation scheme has been developed by establishing TSA method-based fundamental theory and key technique system,and it has been verified to be technically feasible by the pilot test project in Songliao Basin.This paper systematically summarizes the research achievements on TSA method,including triggering and cracking mechanisms of TSA method,indoor physical simulation,research and development of key techniques,as well as pilot test in Songliao Basin.The industrialization advantages of TSA method and main technical difficulties faced by have been comprehensively discussed,including the damages to reservoir seepage capability at high tem-perature and high pressure,group well process control strategies,limitations of hydraulic fracture network,long-term reliability of key surface and downhole equipment,in-situ catalytic methods for quality and efficiency improvement,as well as safety issues throughout the mining process.Moreover,targeted suggestions and research directions for future development are proposed.Ac-cording to the process characteristics of TSA method,China's strategic layout of"carbon peaking,carbon neutrality"and the devel-opment trend of geothermal energy resources,the paper proposes an integrated development innovation system for geological engi-neering based on TSA method for in-situ oil and gas conversion of oil shale resources,waste heat utilization and CO2 geological stor-age,and the research results can promote the comprehensive,clean and efficient development and utilization of oil shale resources.
NETL
NSTL
万方数据
