涪陵页岩气田生产套管防漏堵漏技术对策与实践

Technical Countermeasures and Practice of Leakage Proof and Plugging by Production Casing in Fuling Shale Gas Field

摘要:

页岩气生产井投产前，都要进行大规模分段压裂，生产套管必须能承受不低于90 MPa的施工压力。2013年涪陵工区试验井组相继出现2口井稳不住压现象，导致长水平段分段压裂的储层改造工艺受限，该问题一时成为制约涪陵页岩气田钻井生产和质量的一大“瓶颈”。为此，从生产套管设计、施工、治理3个方面进行了防漏堵漏技术措施研究，并取得一些进展，较好地满足了页岩气高效开发的需要。本文介绍了涪陵页岩气一期产建套管防漏堵漏对策与实践成果，为国内类似页岩气区块的开发提供借鉴和参考。

Abstract:

Before the operation of shale gas production well, large-scale should be carried out, the production casing must be able to bear the construction pressure of ≥90MPa. In 2013, unsteady pressure happened in 2 wells of testing well group in Fuling working area, which resulted in the subsection fracturing technology being confined in long horizontal for reservoir reconstruction, this problem sometimes became the bottleneck that resticted Fuling shale gas drilling production and quality. Therefore, the technical measures of leakage proof and plugging were studied in production casing design, construction and treatment with some progress to meet the requirement of efficient shale gas development. This paper introduces the countermeasures and practice achievements in leakage proof and plugging of casing in the first phase of Fuling shale gas, whi