页岩气钻完井配套技术集成研究与应用

Research on integration of complete shale gas drilling and completion technology

摘要:

随着涪陵页岩气田100×108 m3/a产能建设、长宁-威远国家级页岩气产业示范区等区块页岩气的高效勘探开发，我国的能源结构也在不断地改变。页岩气的商业化开发有赖于丛式水平井钻井技术及大型分段压裂技术的不断发展和进步，高效的钻完井配套技术是提高页岩气勘探开发效果的有力保障。中原石油工程公司通过自主攻关和集成配套相关钻井新工艺、新工具，在钻井实践中取得了一系列技术突破，形成了三维大偏移距长水平段水平井轨迹控制技术、油基乳化/无土相油基钻井液技术、防漏堵漏技术、页岩气随钻解释评价技术、油基钻井液高效冲洗技术、“井工厂拉链式”压裂技术、高压网电配套工程技术等关键技术。上述技术在川渝的涪陵、长宁-威远、永川等工区140余口井的成功应用，有效支撑了我国页岩气产能建设。本文基于中原工程页岩气钻完井配套技术的攻关及实钻经验总结，对其他页岩气勘探开发区块的钻完井工程具有较强的指导意义。

Abstract:

With the construction of Fuling Shale Gas Field annual production capacity of 10 billion square meters and the efficient exploration and development of Changning-Weiyuan National Shale Gas Industry Demonstration Zone, the Chinese energy structure is constantly changing. The commercial development of shale gas depends on the continuous progress of cluster horizontal well drilling technology and large-scale fracturing technology. Efficient complete technology for drilling and completion provides a powerful guarantee for improving the shale gas exploration and development. Sinopec Zhongyuan Petroleum Engineering Co., Ltd. has made a series of technological breakthroughs in drilling practice via independent R & D on and integration of new drilling techniques and tools. It has developed three-dimensional large offset long reach horizontal well trajectory control technology, oil-based emulsification/soil-free oil-based drilling fluid technology, leakage prevention and plugging technology, shale gas interpretation and evaluation-while-drilling technology, oil-based drilling fluid high-efficiency flushing technology, zipper fracturing technology in pad drilling and high-voltage electrical network supporting technology etc. The above technologies were adopted in more than 140 wells in Fuling, ChangningWeiyuan, Yongchuan and other Sichuan-Chongqing work sites, which effectively supported the shale gas productivity construction in China. This paper is a comprehensive summary of complete shale gas drilling and completion technologies based on Zhongyuan shale gas technical research and field experiences, providing good guiding for drilling and completion projects in other shale gas exploration and development blocks.