摘要
针对东海地区砂泥岩互层胶结不充分、地层松散、易塌易漏、地温梯度高的问题,室内结合高温护胶稳定技术、纳微米封堵技术以及活度平衡键合水技术,优选出抗高温胶体稳定剂HFL-T,研发了一套适用于东海地区的反渗透低自由水钻井液体系,并对其综合性能进行了系统评价。结果表明,构建的反渗透低自由水钻井液体系具有流变性好、封堵性能好、抑制性能强、抗污染能力强、生物毒性低等特点,抗高温可达180℃、钻井液膜效率可达0.51、泥页岩线性膨胀率仅为4%、泥岩钻屑滚动回收率高达95.5%。现场两口井应用结果表明,采用反渗透低自由水钻井液体系后,钻进过程中钻井液性能稳定;其井径规则,在水平井段未发生起下钻遇阻,实现了直接起下钻;缩短了钻井周期,提高了钻井时效;实现了该区块的井壁稳定,同时满足海上作业对环保的要求。
Aiming at the problems of insufficient sand mudstone interbed cementation,loose formation,easy collapse and leakage,and high temperature gradient in the East China Sea,we selected an anti-high temperature colloid stabilizer HFL-T by the combination of high temperature colloid stabilizer technology,nano-micron plugging technology,and activity balance bonding water technology,and developed a reverse osmosis low free water drilling fluid system suitable for the East China Sea.The results show that the drilling fluid system has good rheological property,good sealing performance,strong inhibition performance,good anti-pollution ability,and low biological toxicity.The temperature resistance is up to 180 ℃,the efficiency of the drilling fluid film is up to 0.51,the linear expansion rate of shale is only 4%,and the rolling recovery rate of the mudstone drilling cuttings is up to 95.5%.The results of field application in the two wells show that the drilling fluid performance is stable during the drilling process after adopting the reverse osmosis low free water drilling fluid system.The diameter of the well is orderly,there is no tripping difficult in the horizontal section,and the direct trip is achieved.It can shorten the drilling time and improve the drilling efficiency.The wellbore stability of the block is achieved while meeting the requirements of environmental protection for offshore operations.
作者
刘培锴
向兴金
张海山
蔡斌
王荐
崔应中
吴彬
LIU Pei-kai;XIANG Xing-jin;ZHANG Hai-shan;CAI Bin;WANG Jian;CUI Ying-zhong;WU Bin(College of Petroleum Engineering,Yangtze University,Wuhan 430100,China;Shanghai Branch,CNOOC（China）Co.,Ltd.,Shanghai 200030,China;Hubei Hanc New Technology Research Institute,Jingzhou 434000,China)
出处
《化学与生物工程》
CAS
2018年第8期57-62,共6页
Chemistry & Bioengineering
关键词
水基钻井液
井壁稳定
高温稳定性
反渗透低自由水钻井液
砂泥岩互层
water based drilling fluid
wellbore stability
high temperature stability
reverse osmosis low freewater drilling fluid
sand mudstone interbed
