重庆页岩气井油基钻井液堵漏防塌新工艺探索  

A new technology of plugging and collapse prevention with oil-based drilling fluid in Chongqing shale gas wells

作　　者：陈亮[1] 胡进科[2] 耿冬 李子钰 CHEN Liang;HU Jinke;GENG Dong;LI Ziyu(Liupu Drilling Company,Sinopec East China Oilfield Service Corporation,Zhenjiang,Jiangsu 212000,China;Petroleum Engineering Technology Research Institute,Sinopec East China Oil and Gas Company,Nanjing,Jiangsu 210000,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国石化华东石油工程有限公司六普钻井分公司,江苏镇江212000 [2]中国石化华东油气分公司石油工程技术研究院,江苏南京210000 [3]中国地质大学(北京),北京100083

出　　处：《油气藏评价与开发》2021年第4期527-535,共9页Petroleum Reservoir Evaluation and Development

摘　　要：在页岩气井水平段钻井过程中,为保证井下安全,国内常用油基钻井液体系施工,尤其需要解决井漏与井塌的问题。通过对化学固化堵漏工艺的研究,并根据重庆地区龙马溪组页岩岩样XRD(X射线衍射)分析优选纳微米级粒径封堵材料,探索页岩气井堵漏防塌的新工艺。现场应用化学固化技术有效解决了焦页某井的井漏问题,满足了后续施工的要求;钻进过程中,使用了室内优选的聚硅纤维和纳微米级封堵剂,不仅完全控制了坍塌与掉块现象,而且日均钻井液消耗量降低1/3,达到防渗防塌的目的。实践证明化学固化和微纳米封堵是解决页岩气井堵漏防塌的有效方法,对重庆地区页岩气井的开发有着积极的作用。During drilling the horizontal section of a shale gas well,oil-based drilling fluid is commonly used in China in order to ensure downhole safety,especially to solve the problems of lost circulation and well collapse.Based on the study of chemical solidification plugging technology and the XRD(X-ray diffraction)analysis of Longmaxi shale samples in Chongqing area,the nano micron size plugging materials are selected to explore a new technology for plugging and collapse prevention of shale gas wells.Field application of chemical solidification technology effectively solves the lost circulation problem of a well in Jiaoye,and meet the requirements of subsequent construction.In the process of drilling,the polysilicon fiber and micro-nano plugging agent selected in the laboratory not only completely control the collapse and block falling,but also reduce the daily average drilling fluid consumption by 1/3,so as to achieve the purpose of anti-seepage and anti-collapse.It is proved that chemical solidification and micro-nano plugging are effective methods to solve the plugging and collapse prevention of shale gas wells,which play a positive role in the development of shale gas wells in Chongqing area.

关 键 词：油基钻井液 化学固化 页岩气 封堵防塌 工程应用 

分 类 号：TE254[石油与天然气工程—油气井工程]