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Influence of Reservoir Stimulation on Marine Gas Hydrate Conversion Efficiency in Different Accumulation Conditions

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  • Lin Yang

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Chen Chen

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Rui Jia

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Youhong Sun

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Wei Guo

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Dongbin Pan

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Xitong Li

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

  • Yong Chen

    (Engineering College, Jilin University, Changchun 130026, China
    State Key Laboratory of Superhard Materials, Changchun 130012, China
    Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Land and Resources, Changchun 130026, China
    National Geophysical Exploration Equipment Engineering Research Center, Jilin University, Changchun 130026, China)

Abstract

In this paper, we used a method of combining reservoir stimulation technique (RST) with depressurization to investigate the conversion efficiency of marine natural gas hydrate (NGH) reservoirs in the Shenhu area, on the northern slope of the South China Sea, which differ in intrinsic permeability and initial NGH saturation conditions. We also analyzed the influence of the variable-stimulation effect on marine NGH conversion efficiency in different accumulation conditions, providing a reference scheme for improving the NGH conversion efficiency in the Shenhu area. In this work, we performed calculations for the variations in CH 4 production rate and cumulative volume of CH 4 in different initial NGH saturation, intrinsic permeability, and stimulation effect conditions. Variance analysis and range analysis methods were used to analyze the significance of these key factors and their interaction. Furthermore, we investigated the sensitivity of stimulation effect on NGH conversion efficiency. The simulation results showed that the stimulation effect has a significant influence on NGH conversion efficiency, and the influence of interaction between these three factors was not obvious. Possibly most importantly, we clarified that the sparsely fractured networks ( N = 3) had a better effect for higher NGH conversion efficiency under higher saturation conditions. For lower permeability cases, the influence between sparsely ( N = 3) and densely ( N = 5) fractured networks were similar.

Suggested Citation

  • Lin Yang & Chen Chen & Rui Jia & Youhong Sun & Wei Guo & Dongbin Pan & Xitong Li & Yong Chen, 2018. "Influence of Reservoir Stimulation on Marine Gas Hydrate Conversion Efficiency in Different Accumulation Conditions," Energies, MDPI, vol. 11(2), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:2:p:339-:d:129988
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    References listed on IDEAS

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    Cited by:

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    6. Jin, Guangrong & Liu, Jie & Su, Zheng & Feng, Chuangji & Cheng, Sanshan & Zhai, Haizhen & Liu, Lihua, 2024. "Gas production from a promising reservoir of the hydrate with associated and shallow gas layers in the low permeable sediments," Energy, Elsevier, vol. 295(C).
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