Research on integration of complete shale gas drilling and completion technology

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.