A discussion on completion of thermal production wells with φ139.7mm casing in heavy oil reservoirs of Henan oil-Held

In order to lower cost of thermal recovery of heavy oil, this paper performs calculation, comparison and analysis of wells with (?)139. 7mm and (?)177. 8mm casing, in respects of the influences of casing sizes on drilling and cementation operations, and the requirements of completion, steam injection, uplifting and recovery technologies to casing sizes, and discusses the feasibility of production with(?)139.7mm casing. The study results and field application show that completion with