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Special Section of Evaluation of Natural Gas Hydrate Resource Potential in the South China Sea
Petroleum Science >2022,??lssue 1:??- DOI: https://doi.org/10.1016/j.petsci.2021.12.020
Focus on research advances in the natural gas hydrate resource evaluation: Introduction to papers in the special section of Evaluation of Na Open?Access
文章信息
作者：De-Li Gao,
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引用方式：De-Li Gao, Focus on research advances in the natural gas hydrate resource evaluation: Introduction to papers in the special section of Evaluation of Natural Gas Hydrate Resource Potential in the South China Sea, Petroleum Science, Volume 19, Issue 1, 2022, Pages 1-2,
文章摘要
The continental hydrocarbon generation theory has opened a new field of oil and gas development and once solved the oil and gas shortage problem in China. Since then, geological theories of coalbed methane accumulation, foreland basin oil and gas accumulation, carbonate rock oil and gas accumulation, superimposed basin, and deep oil and gas accumulation have contributed to relieving the pressure of oil and gas shortage in China. Even so, Science has listed the energy shortage as one of the 125 biggest challenges facing humankind in the new century (D. Kennedy & C. Norman, 2005).
Globally, there are still abundant oil and gas resources available for human development and utilization. However, most of them are unconventional, deep-formation, and deep-water oil and gas reserves, which are difficult to exploit; that is, the era of easy oil and gas exploitation has basically ended. Unconventional natural gas resources mainly include shale gas, tight gas, coalbed methane, and natural gas hydrate (NGH), etc., which have the essential characteristics of "large quantity, low grade and difficult to exploit". Among which NGH is a kind of low-carbon and clean "solid" energy, which is primarily distributed in deep ocean water and frozen soil, making it more difficult to extract (Gao, 2020). It has attracted global attention and is considered a solution to the shortage of energy in future since 1973 (Arthur, 2011; Wadham et al., 2012), when the former Soviet Union scholars first evaluated the global resource as high as 3 × 1018 m3 (Trofimuk and Cherskiy, 1973). Since then, the United States, Canada, Japan, South Korea, and China have organized large-scale geological surveys and researches successively in the 21st century. In the past 50 years, at least 29 groups of scientists have assessed the global NGH resources, but the estimates vary significantly with up to 10,000 times. Based on the mode values and average values of these evaluation results far more significant than those of conventional oil and gas resources, some scholars believe that the development potential of NGH is enormous. In contrast, some scholars believe that the development prospect is not optimistic based on their decreasing trend (Pang et al., 2020a, Pang et al., 2020b).
Globally, there are still abundant oil and gas resources available for human development and utilization. However, most of them are unconventional, deep-formation, and deep-water oil and gas reserves, which are difficult to exploit; that is, the era of easy oil and gas exploitation has basically ended. Unconventional natural gas resources mainly include shale gas, tight gas, coalbed methane, and natural gas hydrate (NGH), etc., which have the essential characteristics of "large quantity, low grade and difficult to exploit". Among which NGH is a kind of low-carbon and clean "solid" energy, which is primarily distributed in deep ocean water and frozen soil, making it more difficult to extract (Gao, 2020). It has attracted global attention and is considered a solution to the shortage of energy in future since 1973 (Arthur, 2011; Wadham et al., 2012), when the former Soviet Union scholars first evaluated the global resource as high as 3 × 1018 m3 (Trofimuk and Cherskiy, 1973). Since then, the United States, Canada, Japan, South Korea, and China have organized large-scale geological surveys and researches successively in the 21st century. In the past 50 years, at least 29 groups of scientists have assessed the global NGH resources, but the estimates vary significantly with up to 10,000 times. Based on the mode values and average values of these evaluation results far more significant than those of conventional oil and gas resources, some scholars believe that the development potential of NGH is enormous. In contrast, some scholars believe that the development prospect is not optimistic based on their decreasing trend (Pang et al., 2020a, Pang et al., 2020b).