SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (9): 2062-2073.DOI: 10.1016/j.cjche.2018.11.007

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A review: Enhanced recovery of natural gas hydrate reservoirs

Fengguang Li1, Qing Yuan2, Tianduo Li1, Zhi Li1, Changyu Sun3, Guangjin Chen3   

  1. 1 Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250653, China;
    2 School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China;
    3 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2018-09-25 Revised:2018-10-26 Online:2019-12-04 Published:2019-09-28
  • Contact: Changyu Sun, Guangjin Chen
  • Supported by:
    Supported by the National Key Research and Development Program of China (2017YFC0307302, 2016YFC0304003), and the National Natural Science Foundation of China (21636009, 51576209, 51676207, 21522609).

A review: Enhanced recovery of natural gas hydrate reservoirs

Fengguang Li1, Qing Yuan2, Tianduo Li1, Zhi Li1, Changyu Sun3, Guangjin Chen3   

  1. 1 Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250653, China;
    2 School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China;
    3 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • 通讯作者: Changyu Sun, Guangjin Chen
  • 基金资助:
    Supported by the National Key Research and Development Program of China (2017YFC0307302, 2016YFC0304003), and the National Natural Science Foundation of China (21636009, 51576209, 51676207, 21522609).

Abstract: Natural gas hydrate (NGH) is a highly efficient and clean energy, with huge reserves and widespread distribution in permafrost and marine areas. Researches all over the world are committed to developing an effective exploring technology for NGH reservoirs. In this paper, four conventional in-situ hydrate production methods, such as depressurization, thermal stimulation, inhibitor injection and CO2 replacement, are briefly introduced. Due to the limitations of each method, there has been no significantly breakthrough in hydrate exploring technology. Inspired by the development of unconventional oil and gas fields, researchers have put forward some new hydrate production methods. We summarize the enhanced hydrate exploiting methods, such as CO2/N2-CH4 replacement, CO2/H2-CH4 replacement, hydraulic fracturing treatment, and solid exploration; and potential hydrate mining techniques, such as self-generating heat fluid injection, geothermal stimulation, the well pattern optimization of hydrate exploring. The importance of reservoir stimulation technology for hydrate exploitation is emphasized, and it is believed that hydrate reservoir modification technology is a key to open hydrate resources exploitation, and the major challenges in the process of hydrate exploitation are pointed out. The combination of multiple hydrate exploring technologies and their complementary advantages will be the development trend in the future so as to promote the process of hydrate industrialization.

Key words: Hydrate, Exploration/exploitation, Recovery, Production, Stimulation technology

摘要: Natural gas hydrate (NGH) is a highly efficient and clean energy, with huge reserves and widespread distribution in permafrost and marine areas. Researches all over the world are committed to developing an effective exploring technology for NGH reservoirs. In this paper, four conventional in-situ hydrate production methods, such as depressurization, thermal stimulation, inhibitor injection and CO2 replacement, are briefly introduced. Due to the limitations of each method, there has been no significantly breakthrough in hydrate exploring technology. Inspired by the development of unconventional oil and gas fields, researchers have put forward some new hydrate production methods. We summarize the enhanced hydrate exploiting methods, such as CO2/N2-CH4 replacement, CO2/H2-CH4 replacement, hydraulic fracturing treatment, and solid exploration; and potential hydrate mining techniques, such as self-generating heat fluid injection, geothermal stimulation, the well pattern optimization of hydrate exploring. The importance of reservoir stimulation technology for hydrate exploitation is emphasized, and it is believed that hydrate reservoir modification technology is a key to open hydrate resources exploitation, and the major challenges in the process of hydrate exploitation are pointed out. The combination of multiple hydrate exploring technologies and their complementary advantages will be the development trend in the future so as to promote the process of hydrate industrialization.

关键词: Hydrate, Exploration/exploitation, Recovery, Production, Stimulation technology