页岩气井钻遇破碎地层的井身结构优化设计

Optimal Design of Casing Program of Shale Gas Drilling in Broken Formation

摘要:

页岩气的勘探开发和利用对于优化我国能源结构、促进能源工业快速发展、提高优质洁净能源的自给能力和水平，以及降低大气污染、促进环境保护等方面都有至关重要的作用。解决好页岩气井在钻遇破碎地层后的井身结构优化设计，就能够大幅度提高钻效，节省钻探成本，缩短勘探周期，从而促进页岩气资源的大规模开发利用。本文结合页岩气井的生产实践，就页岩气井钻遇破碎地层后井身结构的优化设计问题，特别是开次、选用孔径、套管规格及其下入深度等方面进行了探讨。

Abstract:

Shale gas exploration development and utilization are of importance for optimizing China's energy structure, promoting the rapid development of energy industry, improving self-sufficiency ability and level of the clean energy quality as well as reducing air pollution. By optimizing the casing program for shale gas drilling in broken formation, drilling efficiency will be greatly improved with lower drilling cost and shorter exploration cycle, so as to promote the large-scale development of shale gas resources utilization. Combined with the production practice of shale gas drilling, the discussion is made on the optimal design of casing progress for shale gas drilling in broken formation, especially in the borehole sections, borehole diamter selection, casing specifications and its running depth.