海上油田易坍塌-压力衰竭地层钻井液储层保护研究  

Research on drilling fluidreservoir protection of easy collapse and pressure depletion formotions

作　　者：马双政[1] 张耀元[1] 王冠翔 南源[1] 陈金定[1] 陈诚 MA Shuang-zheng;ZHANG Yao-yuan;WANG Guan-xiang;NAN Yuan;CHEN Jin-ding;CHEN Cheng(Zhanjiang Laboratory Center,Energy Development Limited Company,CNOOC,Zhanjiang 524057,China)

机构地区：[1]中海油能源发展股份有限公司工程技术公司中海油实验中心(湛江),广东湛江524057

出　　处：《化学工程师》2018年第12期39-41,共3页Chemical Engineer

摘　　要：海上NH油田二期调整钻井面临易坍塌和压力衰竭地层形成高压差带来的储层保护难题,本文用复合盐加重技术,提高钻井液密度和抑制性,结合储层孔喉的D90暂堵剂粒径优选规则,优化了暂堵剂粒径分布和比例,降低了高温高压滤失量等实验参数;现场应用的效果验证了钻井液体系封堵效果和与低渗地层岩心适应性。优化后的有机盐无固相体系对高压差地层,渗透率恢复值≥90%,达到了很好的储层保护效果。According to reservoir protection problem with high-pressure difference duing to the easy collapse and pressure depletionduring the second phase adjustment in NH Oil Field,The paper increases the density and inhibition of drilling fluidby mixed salt aggravating;Particle size distribution and the addition proportion of temporary plugging agent was optimized by easy operation D90 particle size optimization rules,reducing high temperature and high pressure water loss and so on;The optimized organic salt and solid free system for high pressure difference formation has good inhibition performance and reservoir protection effect after gel breaking.

关 键 词：易坍塌 压力衰竭 高压差 粒径优选 侵入深度 

分 类 号：TE258[石油与天然气工程—油气井工程]