天然气勘探与开发2025，Vol.48Issue(2)：113-123,11.DOI:10.12055/gaskk.issn.1673-3177.2025.02.011
易漏产水层注水泥隔断塞工艺优化与应用
Optimization and application of cementing plug technology for leaky water-producing layers
摘要
Abstract
In the cementing plug operations for leaky water-producing layers in the Sichuan-Chongqing area,there are recurring problems such as the failure to form plugs after repeated cement injection,insufficient strength of the formed plugs,and difficulty in determining the length of plugged section.To solve these problems,the pressure balance states before,during and after plugging were analyzed deeply with full consideration of the factors related to cementing plug,together with the characteristics of the leaky water-producing layers.Then,a computation model for cementing plug was established,and the method for calculating key parameters such as the injection volume of cement slurry and plugging depth was derived.Finally,the scheme of cementing plug was optimized,and verified through field application.The results show that,(i)the injection volume of cement slurry and the plugging depth are the critical parameters in the design of cementing plug technology,and their optimal values can be calculated by the new method;(ii)the mixing and channeling of cement slurry influencing the quality of cementing plug and plugged section length lead to the loss of section length at the top and bottom surfaces of cement plug,with the expected reasonable range of the total loss being 50-100 m;and(iii)the field application in Wells TC4 and LG64 is smooth and achieves successful plugging in one trip,which significantly improves the success rate of one-trip cementing plug in the leaky water-producing layers,while controlling precisely plugged section length and plugging depth,verifying the effectiveness of the new calculation method,and achieving the optimization for the original technologies.It is concluded that the optimized cementing plug technology for leaky water-producing layers is helpful for improving the operation efficiency,and reducing the scrapped footage of subsequent side tracking.关键词
易漏产水层/井漏失返/侧钻/水泥隔断塞/液柱压力Key words
Leaky water-producing layer/Lost circulation with no return/Side tracking/Cement plug/Liquid column pressure引用本文复制引用
张君毅,简旭,王栋,付华才,张贵鹏..易漏产水层注水泥隔断塞工艺优化与应用[J].天然气勘探与开发,2025,48(2):113-123,11.基金项目
中国石油集团川庆钻探工程有限公司E类科研课题(编号:CQ2023B-Y-15-3). （编号:CQ2023B-Y-15-3）
