Commercial production potential evaluation of injection-production mode for CH-Bk hydrate reservoir and investigation of its stimulated potential by fracture network

Xiuping Zhong, Dongbin Pan, Ying Zhu, Yafei Wang, Guigang Tu, Shuaishuai Nie, Yingrui Ma, Kunyan Liu and Chen Chen

Energy, 2022, vol. 239, issue PB

Abstract: In this study, the productivity of depressurisation combined with thermal stimulation using the injection-production mode (D + Ti) in a CH-Bk reservoir (a natural gas hydrate reservoir exhibiting a low permeability and lack of impermeable boundaries) was explored. By exploring the influence of production parameters and well patterns on hydrate development, the challenges faced in the development of D + Ti and its commercial production potential were explored. Furthermore, the stimulation potential of the fracture network on D + Ti was investigated. The results showed that the interlayer contradiction and the low methane flow capacity between the injection-production well led to poor production ability and insensitivity to production parameters for D + Ti. The permeable caprocks limited the well pattern infilling potential of D + Ti. These defects made it impossible for D + Ti to obtain commercial production in the CH-Bk reservoir. The fracture network significantly improved the productivity and well pattern infilling potential of D + Ti. In particular, the gas production rate and production degree of the five-spot well increased by 6.5 and 7 times, respectively, after network fracturing, reaching commercial standards. Thus, D + Ti combined with network fracturing can be a promising mode for CH-Bk development. This study can provide meaningful guidance for future CH-Bk trial production and commercial development.

Keywords: Natural gas hydrate; Injection-production mode; Commercial production; Fracture network; Stimulation capability (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:239:y:2022:i:pb:s0360544221023616

DOI: 10.1016/j.energy.2021.122113

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