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Stimulation Behavior of Fracture Networks in the Second Hydrate Trial Production Area of China Considering the Presence of Multiple Layers

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  • Chen Chen

    (College of Construction Engineering, Jilin University, Changchun 130026, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Natural Resources, Changchun 130026, China)

  • Xitong Li

    (College of Construction Engineering, Jilin University, Changchun 130026, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Natural Resources, Changchun 130026, China)

  • Xiuping Zhong

    (College of Construction Engineering, Jilin University, Changchun 130026, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Natural Resources, Changchun 130026, China)

Abstract

The fracture network’s stimulation of China’s second hydrate trial production area was investigated. First, the stimulation potential of the fracture network and the influence of well arrangement on hydrate development were explored. Second, the fracture distributions’ influence on development behavior was investigated. Results showed that the fracture network could cause the trial production reservoir to reach the commercial production rate. The average CH 4 production rate of unit horizontal well length using the depressurization method and depressurization combined with thermal stimulation (combined method) were 61.3 and 151.5 m 3 /d with the fracture network and 23.7 and 14.3 m 3 /d without the fracture network. In addition, without the fracture network, the development behavior of wells arranged in the mixed layer was better than that of wells arranged in the hydrate layer. However, with the fracture network, the result was reversed. With the depressurization method, the best production behavior was obtained by fracturing in the hydrate layer; however, for the combined method, the best production behavior was obtained by fracturing in the hydrate and mixed layer, while fracturing in the free gas layer was useless. This study provides a valuable reference for the hydrate development of China’s trial production reservoir.

Suggested Citation

  • Chen Chen & Xitong Li & Xiuping Zhong, 2024. "Stimulation Behavior of Fracture Networks in the Second Hydrate Trial Production Area of China Considering the Presence of Multiple Layers," Energies, MDPI, vol. 17(17), pages 1-21, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4244-:d:1463765
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