南堡35-2油田保护储层钻井液完井液优化设计  

Optimization design of drilling fluid and completion fluid for reservoir protection in Nanbu 35-2 Oilfield

作　　者：罗健生 王雪山 莫成孝 徐绍成 姚慧云 张菊芬 

机构地区：[1]中海油田服务有限公司研发中心

出　　处：《钻井液与完井液》2002年第6期43-45,共3页Drilling Fluid & Completion Fluid

摘　　要：南堡35-2储层具有高孔隙度、高渗透率特点,而且原油粘度高,密度比较大,胶质和沥青质含量都较高,流动性质差,使用常规钻井液完井液对储层稠油的开采很不利。结合活性剂HXJ,优选出了聚合物小阳离子钻井液、PEM聚合醇钻井液、合成基钻井液及活性完井液。室内通过钻井液性能、钻井液完井液与储层流体的配伍性及HXJ对钻井液完井液的岩心渗透率恢复值的影响等实验测试,证明优选出来的3种钻井液体系均可以满足现场的正常钻进,与其它钻井液相比,合成基钻井液滤液使稠油粘度降低的幅度最大,然后依次是加有HXJ的PEM聚合醇钻井液和聚合物小阳离子钻井液;在钻井液完井液中加入HXJ后,能降低油水界面张力,使稠油牯度降低。有利于稠油开采;合成基钻井液的岩心渗透率恢复值最高,在85％以上,加有HXJ的钻井液的渗透率恢复值在83％以上,加有HXJ的完井液的岩心渗透率恢复值比没有加HXJ的完井液高13％左右;优选出的钻井液和完井液对储层的保护效果都比较好。The conventional drilling fluid and completion fluid is not suitable for the development of viscous oil reservoir in Nanbu 35-2 oilfield, due to high porosity and permeability in this area, and the high viscosity and density of the crude oil, as well as the high content of gel and asphalt materials that cause the poor flowability. Combined with the use of activating agent HXJ, the polymer micro cation drilling fluid, PEM polyol drilling fluid, synthetic based drilling fluid and active completion fluids are optimized. By laboratory tests on drilling fluid performances, the compatibility of drilling fluid and completion fluid with formation fluid, and the influencing tendency of HXJ on the core permeability recovery show that all the three drill ing fluid systems are suitable for field drilling, and as compared with other systems, the filtrate of synthetic drilling fluid has the most remarkable effect on dropping crude oil viscosity, and then follows PEM polyol drilling fluid with HXJ and polymer micro cation drilling fluid. Adding of HXJ in drilling fluid and completion fluid can reduce the oil water interface tension, drop the viscosity of crude oil, and is beneficial for viscous oil production. The synthetic based drilling fluid obtained the highest core permeability recovery, which is over 85% , and the drilling fluids with HXJ was over 83%, which is 13% higher than the completion fluid without HXJ. The optimized drilling fluid and completion fluid all obtained good formation protection results.

关 键 词：完井液 合成基钻井液 储层 渗透率 稠油 聚合醇钻井液 阳离子钻井液 岩心 钻进 孔隙度 

分 类 号：TE254[石油与天然气工程—油气井工程] TE258