超双疏强自洁高效能水基钻井液  

Super-amphiphobic,strong self-cleaning and high-efficiency water-based drilling fluids

作　　者：蒋官澄[1,2] 倪晓骁 李武泉 全晓虎 罗绪武 JIANG Guancheng;NI Xiaoxiao;LI Wuquan;QUAN Xiaohu;LUO Xuwu(State Key Laboratory,of Petroleum Resources and Prospecting,Beijing 102249,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Western Drilling Engineering Company of PetroChina,Karamay 834099,China)

机构地区：[1]油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)石油工程学院,北京102249 [3]中国石油集团西部钻探工程有限公司钻井液分公司,新疆克拉玛依834099

出　　处：《石油勘探与开发》2020年第2期390-398,共9页Petroleum Exploration and Development

基　　金：国家“十三五”重大专项“复杂结构井、丛式井设计与控制新技术”(2017ZX05009-003);国家自然科学基金面上项目“钻探天然气水合物中井壁稳定性及钻井液低温流变性的控制方法研究”(51474231);国家自然科学创新研究群体“复杂油气井钻井与完井基础研究”(51521063);国家“十三五”科技重大专项“深井超深井优质钻井液与固井完井技术研究”(2016ZX05020-004);页岩气水基钻井液双疏抑制及润滑性研究(HX20180961)。

摘　　要：基于井下岩石表面双疏理论,研发出可在岩石、滤饼和钻具等表面形成纳—微米乳突物理结构并降低表面自由能,具有'防塌、保护储集层、润滑、提速'功能的聚合物超双疏剂并对其进行性能评价。以该超双疏剂为核心,结合钻遇的地层概况,配套其他处理剂形成了超双疏强自洁高效能水基钻井液体系,并与现场用高性能水基钻井液和典型油基钻井液的性能进行对比。结果表明:超双疏强自洁高效能水基钻井液流变性更佳且高温高压滤失量与油基钻井液相当;超双疏强自洁高效能水基钻井液的抑制性和润滑性接近油基钻井液水平;体系无毒且安全环保。现场试验证明,利用该体系解决了钻井过程中井壁失稳、储集层损害和阻卡卡钻严重、钻速慢、成本高等技术难题,满足了安全、高效、经济、环保的钻井需要,与其他钻井液技术相比,同区块井下复杂情况减少82.9%,钻速提高32.8%,钻井液综合成本降低39.3%,日产量提高1.5倍以上。Based on the amphiphobic theory on underground rock surface,a super-amphiphobic agent is developed and evaluated which can form nano-micro papilla structure on rock,filter cake and metal surface,reduce surface free energy,prevent collapse,protect reservoir,lubricate and increase drilling speed.With this super-amphiphobic agent as the core agent,a super-amphiphobic,strong self-cleaning and high-performance water-based drilling fluid system has been developed by combining with other agents based on drilled formation,and compared with high-performance water-based drilling fluid and typical oil based drilling fluid commonly used in oilfields.The results show that the super-amphiphobic,strong self-cleaning and high-performance water-based drilling fluid has better rheology,and high temperature and high pressure filtration similar with that of oil-based drilling fluid,inhibiting and lubricating properties close to oil based drilling fluid.Besides,the super-amphiphobic system is non-toxic,safe and environmentally friendly.Field tests show this newly developed drilling fluid system can prevent wellbore collapse,reservoir damage and pipe-sticking,increase drilling speed and lower drilling cost,meeting the requirement of safe,high efficient,economic and environmentally friendly drilling.Compared with other drilling fluids,this new drilling fluid system can reduce downhole complexities by 82.9%,enhance the drilling speed by about 18.5%,lower drilling fluid cost by 39.3%,and increase the daily oil output by more than 1.5 times in the same block.

关 键 词：聚合物 超双疏剂 水基钻井液 储集层保护 井壁稳定 

分 类 号：TE256.7[石油与天然气工程—油气井工程]