Advances in New and Renewable Energy >
The Natural Gas Hydrate Petroleum System in the Gulf of Mexico
Received date: 2013-08-12
Revised date: 2013-09-04
Online published: 2013-10-31
Since 1980, natural gas hydrate research in the Gulf of Mexico underwent three stages, gas hydrate discovery, gas hydrate research in the shallow layers, and gas hydrate exploration. Especially the “Joint Industry Project” conducted from 2005, providing numerous geological, geophysical and geochemical data, which would make the Gulf of Mexico being the forefront area in marine gas hydrate research. Based on integrated investigation, summarizing and comparison of these data, this study preferred to use the concept and method of gas hydrate petroleum system to describe gas hydrate stability conditions, gas composition and source, favorable sedimentary units, and gas/fluid migration pathways. The results showed that, the temperature and pressure conditions in the continental slope of the Gulf of Mexico were suitable for the formation of gas hydrate. Both thermogenic and biogenic gas could be regarded as the source in this area. The deep-water sedimentary units, including channel, levee, mass transport complex, and so on, could be served as the potential reservoirs and accumulation spaces for gas hydrate. Besides, salt diapirism, fault, tilted strata and fracture network could afford the pathways for gas/fluid migration. Through the practical application in the Gulf of Mexico, the gas hydrate petroleum system was considered as a comprehensive and systematic idea not only because of the regard on physical conditions, but also due to the emphasize on actual geological setting, causing itself to be a rapid assessment method for marine gas hydrate. However, for the description of hydrate-bearing units and analyses on the heterogeneous distribution of gas hydrate, detailed dissection on deep-water sedimentary system and fluid migration would be the focuses. Therefore, combination with the identification marks of gas hydrate, distribution of favorable sedimentary units, and gas/fluid migration pathways, would be the objective of marine hydrate exploration in the future.
Key words： gas hydrate; gas hydrate petroleum system; Gulf of Mexico
SU Ming , QIAO Shao-hua , WEI Wei , ZHANG Jin-hua , YANG Rui , WU Neng-you , CONG Xiao-rong . The Natural Gas Hydrate Petroleum System in the Gulf of Mexico[J]. Advances in New and Renewable Energy, 2013 , 1(2) : 179 -186 . DOI: 10.3969/j.issn.2095-560X.2013.02.010
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