Key Technology of Drilling and Completion for Shale Gas in Jiannan Structure of Western Hubei and Eastern Chongqing Area

Horizontal wells and multistage and sectional fracturing technology were needed for achieveing commercial development of shale gas,it was required that drilling fluid and cementing technology be compatible each other.According to the practice of shale gas drilling in Jiannan Structure of Dongyuemiao Area,the technology application of shale gas drilling and completion are analyzed,including wellbore structural design,performance of oil-based drilling fluids and cementing technology.It proposes solutions for existing problems.