钻井液与完井液2023，Vol.40Issue(5)：556-562,7.DOI:10.12358/j.issn.1001-5620.2023.05.002
川西断缝体储层封堵固壁钻井液技术
Drilling Fluid Technology for Plugging and Strengthening the Borehole Wall of Wells Penetrating the Faulted Fractured Reservoirs in West Sichuan
摘要
Abstract
Drilling the broken formations in the faulted fractured reservoirs in west Sichuan has been encountered with frequent drill pipe sticking and a well is very difficult to be drilled in accordance with the designed parameters.Geological characteristics analyses and laboratory evaluation results have shown that the rocks in the faulted fractured broken formations are weakly bonded and are developed with microfractures.When a liquid invades into the microfractures,the microfractures extend and the integrity and mechanical property of the rocks are damaged,which in turn changes the status of the effective stresses of the rocks around the borehole and results in borehole collapse.Based on this conclusion,a high temperature chemical borehole wall strengthening agent was developed and a high efficiency plugging agent selected to formulate a drilling fluid with the capacity of plugging and strengthening the borehole walls in the faulted and fractured formations.This drilling fluid,with an enhanced plugging and strengthening capacity,has been successfully used in drilling several wells,including the well M6,and the walls of the borehole penetrating the broken faulted fractured formations were maintained stable during drilling.This drilling fluid will have a good application prospect.关键词
断缝体/破碎性地层/封堵/固壁/钻井液Key words
Faulted fractured formation/Broken formation/Plugging/Borehole wall strengthening/Drilling fluid分类
能源科技引用本文复制引用
高书阳,汤志川,宋碧涛,李凯贤,刘祚才..川西断缝体储层封堵固壁钻井液技术[J].钻井液与完井液,2023,40(5):556-562,7.基金项目
国家自然科学基金"海相深层高温高压钻完井工程基础理论及控制方法"(U19B6003-05) （U19B6003-05）
中石化西南石油工程有限公司项目"断缝体地层安全钻井技术先导试验研究"(XN-2021-005). （XN-2021-005）
