北美页岩油气长水平段水平井钻井实践与启示

Drilling practice of shale oil&gas horizontal wells with long horizontal section in the North America and its enlightenment

在低油价压缩成本和提高油气单井产量的双重压力下,通过增加水平段长度已成为北美页岩油气公司降本增效的重要突破口。北美页岩油气生产商采取了一系列技术措施提高长水平段水平井钻井效率,降低了单位英尺作业成本,取得了较好的经济效益。通过调研北美页岩油气长水平段水平井钻井现状,分析了主要油气公司采用的关键钻井技术,包括井身结构优化设计、超大规格钻机、定向工具、钻井液、下套管技术等,结合我国页岩油气水平井钻井现状及技术需求,提出了长水平段水平井钻井技术发展建议,旨在为我国页岩油气增储上产、降本增效提供借鉴。

Under the double pressures of reducing the costs and increasing the single-well oil and gas production at low oil price,improving the length of horizontal section has already become an important breakthrough of North American shale oil and gas companies to realize cost reduction and benefit increase.North American shale oil and gas producers take a series of technological measures to increase the drilling efficiency of horizontal wells with long horizontal section and reduce the operation cost per foot,and as a result,better economic benefit is achieved.In this paper,the drilling status of shale oil&gas horizontal wells with long horizontal section in the North America were investigated,and the key drilling technologies adopted by the major oil and gas companies were analyzed,including optimized design of casing program,super-spec rigs,directional tools,drilling fluids and casing running technologies.Then,combined with the drilling status and technological demands of shale oil&gas horizontal wells in China,the suggestions for developing the drilling technologies of horizontal wells with long horizontal section were proposed,so as to provide the reference for the reserves and production increase and the cost reduction and benefit increase of domestic shale oil and gas.