Design and application of well cementing technology based on the precise managed pressure balancing method in narrow pressure window hole sections

• Published in: Natural Gas Industry B Vol. 7; no. 3; pp. 285 - 291
• Main Authors: Guo, Jianhua, Zheng, Youcheng, Li, Wei, Li, Bin, Yuan, Bin, Xu, Bihua
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2020; KeAi Communications Co., Ltd
• Subjects: Cementing; Liner; Lost circulation; Narrow safety density window; Precise managed pressure; Pressure balancing; Sichuan basin; Sichuan basin; Cementing; Pressure balancing; Precise managed pressure; Narrow safety density window; Lost circulation; Liner

In the Sichuan Basin, the drilling of complex deep and ultradeep wells is restricted by the casing sequence. Multiple pressure systems are usually encountered in the same open hole section, and narrow safety density window is observed in vertical strata. The application of managed pressure drilling...