| 延长陆相页岩气水平井提速技术研究 |
| 投稿时间：2019-04-29 修订日期：2020-02-17 点此下载全文 |
| 引用本文：李永耀,李国荣,罗红芳,等.延长陆相页岩气水平井提速技术研究[J].钻探工程,2020,47(3):9-15.LI Yongyao,LI Guorong,LUO Hongfang,et al. Study on the technology of improving the mechanical drilling speed of horizontal wells for terrestrial shale gas[J]. Drilling Engineering, 2020,47(3):9-15. |
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| 基金项目:国家科技重大专项“延安地区陆相页岩气勘探开发关键技术”课题三（编号：7ZX05039-03）；国土资源部“十三五”全国油气资源评价省部级项目“延长石油矿权区油气资源评价”（编号：2017YQZYPJ0110） |
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| 中文摘要:“延安国家级陆相页岩气示范区”已钻水平井存在机械钻速低、钻井周期较长等问题，直接影响陆相页岩气的低成本、高效勘探开发。提高机械钻速是缩短钻井周期、降低钻井成本的重要手段，也是优快钻井的直接体现。在分析了延安陆相页岩地层岩石力学特性的基础上，开展了优选钻头、优化钻井机械参数和水力参数等3个方面的研究，以增强钻头对地层的适应性、提升井眼清洁能力和提高机械钻速。最终形成了适合陆相页岩气水平井的钻井关键技术，并在示范区3口水平井进行了成功应用，钻井周期缩短11 d，水平段机械钻速提高120.08%，实现了陆相页岩气水平井的优快钻井，具有较好的推广价值。 |
| 中文关键词:陆相页岩气 水平井 优快钻井 钻井周期 岩石力学 |
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| Study on the technology of improving the mechanical drilling speed of horizontal wells for terrestrial shale gas |
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| Abstract:In the Yan’an National Terrestrial Shale Gas Demonstration Zone, there are problems such as low mechanical drilling speed, long drilling time, which directly affects exploration and development of terrestrial shale gas at low-cost, high-efficiency. Increasing the drilling speed is important means to shorten the drilling time and reduce the drilling cost, and it is also a direct indicator of optimum and fast drilling. This paper analyzes the rock mechanical characteristics of the terrestrial shale formation, and carries out theoretical research on three aspects: optimizing the drill bit, optimizing the drilling mechanical parameters and hydraulic parameters so as to enhance the adaptability of the drill bit to the formation, and improve the wellbore cleaning ability and the drilling speed. As a result, the key drilling technology suitable for the development of terrestrial shale gas horizontal wells has been developed with 3 horizontal wells successfully completed in the demonstration area. The drilling time was shortened by 11 days, and the horizontal drilling rate increased by 120.08%. It has achieved optimum and fast drilling of horizontal wells for terrestrial shale gas and is worthy of promotion. |
| keywords:terrestrial shale gas horizontal well optimum drilling drillingtime rock mechanics |
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