无固相弱凝胶钻开液延时破胶技术研究  

Research on Delayed Gelout Technology of Weak-gelled Solid-free Drill-in Fluid

作　　者：张荣[1] 李自立[1] 王洪伟[1] 

机构地区：[1]中海油田服务股份有限公司油田化学事业部

出　　处：《钻井液与完井液》2011年第2期42-44,98,共3页Drilling Fluid & Completion Fluid

摘　　要：为了简化完井作业工序、提高钻井和完井作业效率,采用包囊材料HSN和氧化剂HGC制备了延时破胶剂HYP。实验结果表明,随着HSN质量分数的增大,制备的缓释破胶剂HYP在相同的时间下对PRD无固相弱凝胶钻开液的破胶率逐步减少,表明其缓释性能越来越好。介绍了破胶剂HGC和HYP的延时破胶机理,并对其破胶效果进行了评价。评价结果表明,HGC可直接作为70～80℃下PRD无固相弱凝胶钻开液的延时破胶剂;在80～100℃下,HYP对PRD钻开液具有较好的延时破胶效果;HYP具有较好的储层保护效果,加有HYP的PRD钻开液的渗透率恢复值大于90%。The delayed breaker HYP is developed with coating material HSN and oxidant HGC to simplify operating sequence and improve efficiency. The experimental results show that HSN has good slow release performance and HGC can be used as delayed breaker of weak-gelled solid-free drill-fluid PRD at 70 ℃ to 80 ℃. At the temperature of 80 ℃ to 100 ℃, HYP is applied to break PRD, and its permeability recovery rate is more than 90%.

关 键 词：无固相弱凝胶钻开液 破胶剂 延时破胶 防止地层损害 

分 类 号：TE254.3[石油与天然气工程—油气井工程]