Key Drilling and Completion Technology of Compressed Air Energy Storage Power Station Demonstration Project

Due to the immaturity of drilling and completion technology for large boreholes in compressed air energy storage wells, research on special tools such as injection production packers and injection production wellhead devices for casing completion is still in its infancy. And there are significant differences compared to conventional oil and gas well technology. We have carried out personalized design of drill bits and expanders, optimization of drilling parameters and drilling fluids, and other large wellbore rapid drilling technologies. Mechanical analysis of drilling tool assembly and stability control of drilling tools to prevent fatigue damage, ensuring wellbore quality and safe construction. Research on key technologies such as safe casing insertion, optimization of cementing process, and sealing of completion tubing and annulus. The key technologies for drilling and completion of compressed air energy storage power stations have been developed. And applied on-site in 2 brine discharge wells and 8 injection production wells. The on-site application results show that: The selected drill bit and reamer have stable performance, and the selected drilling tool combination can achieve safe-fast drilling; Cementing technology has good sealing and stability, meeting the requirements of repeated injection and production; The developed injection production packer and injection production gas wellhead device for casing completion have passed the sealing inspection. Provided engineering and technical support for the construction of compressed air energy storage power station demonstration projects.