Application Of Gas Lift Technology In High-Deviated Well In Nanpu Oilfield

At present, the gas lift production technology used in conventional vertical Wells is basically maturing, but its adaptability of application is poor in high-deviated wells. The paper mainly aims at the technique challenges of gas lift production applied in high-deviated well, and the researches on some aspects such as the design optimization of gas lift, the mechanics analysis of downhole strings, the optimization of completion strings, and the research and development of completion tools and wire dropping& fishing tools. Finally, a set of gas lift production technology suitable for the application of high-deviated wells has been formed. This technology has been applied in 93 high-deviated wells in Nanpu 1-3 artificial island of Jidong oilfield with the design of gas lift coincidence rate 92%, string success rate 97% and success rate of gas lift put into production 100%. And gas lift production has been successfully realized in high-deviated and horizontal well in China.