煤层气多分支水平井分支井眼重入筛管完井技术

Re-Entry Screen Completion Technology for Multi-Lateral Boreholes in CBM Multi-Lateral Horizontal Wells

谭天宇 李浩 李宗源 蒋海涛 何景朝

TAN Tianyu LI Hao LI Zongyuan JIANG Haitao HE Jingchao

中国石油集团渤海钻探工程有限公司工程技术研究院，河北任丘 062550 中国石油华北油田分公司煤层气事业部，河北任丘 062550

Engineering Technology Research Institute, BHDC, CNPC, Renqiu, Hebei, 062550,China Coalbed Methane Division, Huabei Oilfield Company, Renqiu, Hebei, 062550,China

为了解决煤层气多分支水平井分支井眼因重入困难、不能下入筛管、无法实现筛管完井的问题，研制了空心结构的筛管完井重入引导工具，优选了煤层气多分支水平井完井方式，给出了分支井眼重入筛管完井施工步骤，形成了煤层气多分支水平井分支井眼重入筛管完井技术。该技术在沁试12平1井的现场试验结果表明，对比重入引导工具与钻进时MWD测得的井眼轨迹数据可判断是否重入成功，筛管能顺利通过筛管完井重入引导工具下至分支井眼，实现分支井眼筛管完井。研究结果表明，煤层气多分支水平井分支井眼重入筛管完井技术，解决了煤层气水平井分支井眼无法重入、不能实现筛管完井的问题。

In order to solve problems caused by difficult re-entry of branched boreholes in CBM multi-lateral horizontal wells, such as the inability to RIH screen and the impossibility to realize the screen completion, a re-entry guide tool for screen completion with hollow structure was developed, the completion technology for multi-lateral borehole in CBM multi-lateral horizontal wells was optimized, and the steps of re-entry screen completion for multi-lateral borehole were proposed, thereby forming the re-entry screen completion technology for multi-lateral CBM horizontal wells. The technology was tested in Well Qinshi 12-1; and the test results showed that by comparing the re-entry guide tool with the borehole trajectory data measured by MWD, and it could be judged whether the re-entry was successful, and the screen could be RIH to the branched wellbore to achieve the screen completion. The results also showed that the re-entry screen completion technology for multi-lateral CBM horizontal wells solved the problems of difficult re-entry and the screen completion.

国家科技重大专项“煤层气新型水平井钻完井关键技术与工具研究”（编号：2016ZX05022-004）和“沁水盆地高煤阶煤层气高效开发示范工程”（编号：2017ZX05064）联合资助

https://doi.org/10.11911/syztjs.2019121