复合膜封堵剂实验研究与应用  

Experimental Study and Application of Composite Membrane Sealing Agent

作　　者：来东风 王瑜 杨景中 王永 范英娜 吕方 LAI Dongfeng;WANG YU;YANG Jingzhong;WANG Yong;FAN YINGNA;LYU Fang(Jidong Oilfield Exploration and Development Construction Supervision Center,Tangshan 063200,China;Hubei Hanc New Technology Co.,Ltd.,Jingzhou 434003,China)

机构地区：[1]冀东油田勘探开发建设监督中心,河北唐山063200 [2]湖北汉科新技术股份有限公司,湖北荆州434003

出　　处：《山东化工》2024年第24期158-160,163,共4页Shandong Chemical Industry

基　　金：中国石油冀东油田分公司科技专项项目“南堡2号构造火山碎屑岩钻井防漏堵漏与井壁稳定技术优化研究”(编号JDYT-2024-1187)。

摘　　要：针对页岩钻井过程井壁失稳的问题,通过地层微观结构特征分析,室内优选出复合膜封堵剂HFP,评价数据表明,复合膜封堵剂HPF对体系的流变性影响较小,2%加量下体系滤失量明显降低,HTHP滤纸、滤膜滤失量分别降低了31.2%和20.4%,且膜效率提高了17.8%,体现出较好的封堵纳微米孔缝的能力,能延缓压力传递,有助于增强井壁稳定性。现场应用结果显示,与邻井相比,使用复合膜封堵剂HFP后钻井液体系流动性好,返出钻屑均匀无掉块,井壁稳定,无井下复杂情况,平均机械钻速大幅提高,促进了钻井综合时效的提升。In response to the problem of wellbore instability during shale drilling,a composite membrane plugging agent HFP was selected through analysis of the microstructure characteristics of the formation.Evaluation data showed that the composite membrane plugging agent HPF had little effect on the rheological properties of the system,and a 2%addition significantly reduced the filtration loss of the system.The filtration loss of HTHP filter paper and filter membrane decreased by 31.2%and 20.4%respectively,and the membrane efficiency increased by 17.8%,demonstrating good ability to block nano and micro pores and fractures,delaying pressure transmission and helping to enhance wellbore stability.The on-site application results show that compared with neighboring wells,the use of composite membrane plugging agent HFP results in better fluidity of the drilling fluid system,uniform return of drilling cuttings without falling blocks,stable wellbore,no complex downhole situations,significantly improved average mechanical drilling speed,and promoted the improvement of comprehensive drilling efficiency.

关 键 词：页岩 井壁失稳 纳微米 封堵 

分 类 号：TE254[石油与天然气工程—油气井工程]