桂北地区罗地1井钻探施工实践

Practice of Well Luodi-1 Drilling Construction in North of Guangxi

摘要:

页岩具有较强的水敏性，在页岩气勘查钻进施工中，井内易发生坍塌、剥落造成超径或缩径等井壁失稳现象。罗地1井采用金刚石绳索取心工艺进行钻进，完井井深1501.06 m，岩心采取率、井斜等各项指标均符合地质设计要求。本文主要从罗地1井的钻井设备、井身结构、施工难点等方面进行总结，可为今后页岩气调查井的施工提供参考。

Abstract:

Shale has strong water sensitivity, borehole instability of over-diameter and diameter reducing caused by collapse and spall often happen in shale gas exploration drilling. Diamond wire-line coring technology was adopted in well Luodi-1 with the completed depth of 1501.06m, core recovery and hole deviation are all in accordance with geological design requirements. This paper summarizes the drilling equipments, wellbore structure and construction difficulties of well Luodi-1 in order to provide reference for the construction of shale gas investigation well in the future.