煤层气多分支水平井分支井眼重入筛管完井技术 |
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引用本文: | 谭天宇,李浩,李宗源,蒋海涛,何景朝.煤层气多分支水平井分支井眼重入筛管完井技术[J].石油钻探技术,2020,48(4):78-82. |
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作者姓名: | 谭天宇 李浩 李宗源 蒋海涛 何景朝 |
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作者单位: | 1.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 |
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基金项目: | 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 |
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摘 要: | 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。
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关 键 词: | 煤层气 水平井 多分支井 筛管完井 沁试12平1井 |
收稿时间: | 2019-10-25 |
Re-Entry Screen Completion Technology for Multi-Lateral Boreholes in CBM Multi-Lateral Horizontal Wells |
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Affiliation: | 1.Engineering Technology Research Institute, BHDC, CNPC, Renqiu, Hebei, 062550,China2.Coalbed Methane Division, Huabei Oilfield Company, Renqiu, Hebei, 062550,China |
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Abstract: | 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. |
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