隆页2HF页岩气水平井钻井技术研究与实践

Research and Practice on Drilling Technology of Horizontal Shale Gas Well Longye 2HF

摘要:

四川盆地周缘蕴藏有大面积常压低丰度海相页岩气，依目前的开发成本，储量难以动用，亟需开展低成本钻井工程工艺技术攻关，盘活该类页岩气资源。中石化华东油气分公司在渝东南武隆地区从钻、测、录、固等方面开展了低成本钻井技术研究。通过分析导致钻井成本高的原因，重点从井身结构优化、井眼轨迹控制优化、钻井工具优选、防漏堵漏措施以及测井、录井、固井工艺优化等方面进行了技术研究与现场实践，试验井隆页2HF井由导眼井与侧钻水平井两部分构成，钻井成本较邻井降低了30%，为武隆地区常压页岩气开发奠定了基础。

Abstract:

The peripheral blocks in Sichuan Basin contain a large area of marine shale gas with low abundance and normal pressure, according to the current development costs, the reserves are difficult to be used, and it is urgent to carry out the low-cost technical breakthrough of drilling engineering to revitalize the shale gas resources. The research on low-cost drilling technology has been carried out in drilling, logging and cementing in Wulong area of southeast Chongqing. Based on the analysis on the causes of high drilling cost, the technical research and field practice are carried out mainly in the optimization of well bore structure, well trajectory control and drilling tools, leakage protection & control as well as the optimization of logging and cementing, etc. The test well Longye 2HF is composed of guide hole and sidetrack horizontal well, the drilling cost decreased by 30% compared with the adjacent well, which lays a foundation for the development of normal pressure shale gas in Wulong area.