长庆页岩油水平井华H90-3井超长水平段防漏堵漏技术

Lost Circulation Prevention and Plugging Technologies for the Ultra-Long Horizontal Section of the Horizontal Shale Oil Well Hua H90-3 in Changqing Oilfield

孙欢 朱明明 王伟良 李治君 陈宁 刘斌

SUN Huan ZHU Mingming WANG Weiliang LI Zhijun CHEN Ning LIU Bin

中国石油集团川庆钻探工程有限公司长庆钻井总公司, 陕西西安 710018 中国石油长庆油田分公司页岩油项目组, 甘肃庆阳 745100 中国石油集团川庆钻探工程有限公司钻采工程技术研究院, 陕西西安 710018

Changqing Drilling Company, CNPC Chuanqing Drilling Engineering Company Limited, Xi’an, Shaanxi, 710018, China Shale Oil Project Group, PetroChina Changqing Oilfield Com-pany, Qingyang, Gansu, 745100, China Drilling & Production Engineering Technology Research Institute, CNPC Chuanqing Drilling Engineering Company Limited, Xi’an, Shaanxi, 710018, China

华H90-3井是部署在长庆油田陇东国家级页岩油示范区的一口超长水平段水平井，由于地质运移作用，该井水平段储层不连续，存在断层；砂体孔隙发育良好，地层承压能力低；地层流体活跃，堵漏浆被稀释后不易滞留，无法固化，防漏堵漏难度大。针对上述技术难点，应用当量循环密度监测技术，进行井漏超前预防；采用随钻堵漏技术，提高堵漏效率；研发阻水型可固化纤维堵漏工作液，配合漏层精准定位技术，实现漏层一次封固，形成了页岩油超长水平段防漏堵漏关键技术。该技术进行了现场应用，实现了华H90-3井顺利完钻，完钻水平段长度达到5060 m，刷新亚洲陆上页岩油水平井最长水平段纪录。研究认为，该技术为我国页岩油超长水平段水平井钻井提供了技术借鉴。

Well Hua H90-3 is an ultra-long horizontal well deployed in the Longdong National Shale Oil Demonstration Area in Changqing Oilfield. Due to geological migration, the horizontal section of the well has a discontinuous reservoir with faults in it. The pores of sand bodies are well developed, and the pressure-bearing capacity of the formation is low. In addition, formation fluids are active, and the plugging fluid cannot be retained or solidified after dilution, which increases the difficulty in plugging. In view of the above technical difficulties, the equivalent circulating density (ECD) monitoring technology was applied to prevent lost circulation in advance, and the plugging while drilling technology was incorporated to improve the efficiency of plugging. Moreover, curable and water-blocking fibrous working fluids for lost circulation control were developed to achieve the one-time sealing of the thief zone in combination with the precise positioning technology, so that the key technologies of lost circulation prevention and plugging were formed for the ultra-long horizontal sections of shale oil. The on-site application of the technologies made possible the successful drilling of Well Hua H90-3, with a horizontal section length of 5 060 m, which set a new record for the longest horizontal section of onshore horizontal shale oil wells in Asia. The research showed that the technologies could provide a technical reference for the drilling of horizontal shale oil wells with ultra-long horizontal sections in China.

中国石油集团川庆钻探工程有限公司长庆钻井总公司重点项目“长庆大型漏失井四合一综合治漏技术研究与规模化应用”（编号：2019T-008-003）资助

https://doi.org/10.11911/syztjs.2022004