Improving displacement efficiency by optimizing pad fluid injection sequence during primary cementing of eccentric annulus in shale gas horizontal wells

• Published in: Journal of petroleum science & engineering Vol. 204; p. 108691
• Main Authors: Yang, Mou, Yang, Lvchao, Li, Yufei, Zhang, Lin, Wang, Chuanlei, Zhou, Lang, Yang, Mingzheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2021
• Subjects: Cementing; Computational fluid dynamics; Displacement efficiency; Eccentric horizontal well; Multiphase displacement; Pad fluid injection sequence; Displacement efficiency; Eccentric horizontal well; Computational fluid dynamics; Cementing; Pad fluid injection sequence; Multiphase displacement

Displacement efficiency of horizontal wells is mainly affected by casing eccentricity and slurry column structure in the wellbore, and it is an essential precondition for ensuring primary cementing quality. Most current studies use annulus two-phase flow to study the effect of eccentricity on displa...