汶川地震断裂带科学钻探项目尾管固井技术的应用

Application of Liner Cementation Technology in Wenchuan Earthquake Fault Scientific Drilling Project

摘要:

介绍了汶川地震断裂带科学钻探项目钻探施工过程中尾管固井技术的应用情况。针对该项目钻探施工的复杂地层条件，研发了适合于破碎地层和小套管间隙的无接箍尾管固井技术，关键技术包括尾管管柱设计、尾管下入及钻柱分离技术和施工工艺、适合于破碎地层和小套管间隙条件的尾管固井浆液设计和施工工艺。采用研发成功的尾管固井技术，在该项目的二号孔和三号孔中共进行了4次下尾管作业，均获得了成功。

Abstract:

This article introduces the liner cementation technology and its application in Wenchuan earthquake scientific drilling project. According to the conditions of complex formation in this drilling project, liner cementation technology which is suitable for broken formation and small annulus between borehole and casing string, has been developed. The key points of this technology include liner string design and installation and cementing slurry design and construction. This technology has been successfully used in 4 liner cementation operations.