无源磁导向技术在储气库南堡12-198井的应用

Application of Passive Magnetic Guidance Technology in Nanpu 12-198 Well of Gas Storage

胡勇科 李超锋 王金忠

HU Yongke LI Chaofeng WANG Jinzhong

冀东油田公司储气库建设项目部，河北唐海　063200

Gas Storage Construction Project Department of Jidong Oilfield Company, Tanghai, Hebei 063200, China

复杂疑难井的有效处置是保证地下储气库密封完整性的关键。南堡12-198井为南堡1-29储气库建库范围内的一口疑难处置井，该老井有多个侧钻井眼，其中一个侧钻井眼钻穿盖层，与储层连通，存在井漏、溢流风险，若不能有效实施封堵，将影响储气库密封性和运行安全。该井眼内落井钻具长度约1 163 m，常规方法难以完成作业。采用打新钻救援井的方式，利用陀螺和国产无源磁导向技术，精准确定救援井与老井眼落鱼之间的方位和距离，实现在鱼底与老井眼裸眼段重入，顺利冲探至井底，完成封堵目标。该井找眼重入成功，给国内储气库复杂疑难井处置探索出一条有效途径。

The effective disposal of complex wells is the key to ensure the sealing integrity of underground gas storage. Nanpu 12-198 well is a difficult disposal well within the scope of Nanpu 1-29 gas storage reservoir construction. The old well has multiple side drilling holes. One of the side drilling holes penetrates the cap rock and connects with the reservoir, with a risk of lost circulation and overflow. If the plugging cannot be effectively implemented, it will affect the sealing and operation safety of the gas storage. The length of the drilling tool in the wellbore is about 1 163 m, and it is difficult to complete the operation by conventional methods. By means of drilling new rescue wells, using gyroscope and domestic passive magnetic guidance technology, the azimuth and distance between the rescue well and the old borehole falling fish are accurately determined, and the re-entry of the fish bottom and the open hole section of the old borehole is realized, and the well bottom is successfully drilled to complete the plugging target. The successful re-entry of the well has explored an effective way for the disposal of complex wells in domestic gas storage.

https://doi.org/10.3969/j.issn.1008-2336.2023.02.084