Key Technologies and Development Directions of Ultra-deep Well Drilling in Western Sichuan
Marine carbonate rocks in Sichuan Basin are rich in oil and gas resources,but the structural stratigraph-ic conditions are complex and the wellbore environment is harsh.In recent years,the key technologies for deep and ultra-deep well drilling in Sichuan basin has supported the increase of oil and gas reserves and production,and laid a technical foundation for the exploration and development of ultra-deep oil and gas resources.The research on integrated design technology of geology and engineering is worth carrying out for development of ultra-deep oil and gas resour:including establishment of three-dimensional geomechanical model through the fine depiction of complex geological bodies for guiding the design of wellbore structure and wellbore track,research of wellbore structure expansion based on expansion tube and reaming while drilling,and guiding the design of drill bits and ROP optimization tools through rock drillability profiles.In view of the problems of delayed abnormal monitoring and identification of wellhead overflow and severe vibration of drill strings in deep and ultra-deep wells,it is re-quired to continue to develop complexity prevention and control technologies based on big data analysis.And fur-ther research and development is till being performed such as expansion pipes,high-density water-based drilling fluids resistant to 220℃,oil-based drilling fluid systems resistant to 260℃,cement slurry systems with tempera-ture resistance of more than 240℃,high-performance cementing materials and high-temperature plugging materi-als.At the same time,intelligent technologies such as the Internet of Things,new communications,and big data should be closely combined to realize the operation,analysis and management of the whole process of drilling.
NETL
NSTL
万方数据
维普
