Key technology and practice of well stimulation with geology and engineering integration of ultra-deep fractured sandstone gas reservoir

doi:10.3969/j.issn.1672-7703.2022.01.016

Abstract

Abstract: Faced with the challenges in stimulation of ultra-deep fractured gas reservoir, the key stimulation technology system with geology and engineering integration is researched and developed by taking geomechanics as a link, and a multi-dimensional ultra-deep reservoir stimulation workflow is formed including well location selection, well type and well trajectory optimization, and fine design of stimulation scheme. The results show that the ultra-deep reservoir is characterized by high temperature, high pressure, high in-situ stress, well developed fractures and strong heterogeneity. Different from the stimulation mechanism for medium-shallow reservoir, activation of natural fractures is the key in stimulation of ultra-deep fractured gas reservoirs. The geology-engineering integrated stimulation technology enables to increase production more precisely and more effectively, reduce difficulties in field engineering, and avoid risks in conventional fracturing operations.The technology has been applied for more than 150 wells in Kelasu structural belt in Kuqa Depression, with open gas flow increased by 3-5 times, which supports realize the efficient development of ultra-deep fractured sandstone gas reservoir, and build a large gas field with production capacity of 150×10⁸m³.

CLC Number:

TE319

Wang Zhimin, Zhang Hui, Xu Ke, Wang Haiying, Liu Xinyu, Lai Shujun. Key technology and practice of well stimulation with geology and engineering integration of ultra-deep fractured sandstone gas reservoir[J]. China Petroleum Exploration, 2022, 27(1): 164-171.

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