PRELIMINARY DISCUSSION ON GEOLOGICAL DISTRIBUTION OF METAMORPHIC CORE COMPLEX AND HYDROCARBON INKUCHE DEPRESSION
Received date: 2006-12-27
Revised date: 2007-03-05
Online published: 2008-06-20
The distribution of oil and gas in the Kuche depression has a special feature, that is, “gas in the east, oil in the west and the maturity of natural gas higher maturation in the north, lower maturation in the south.” The analysis of the distribution of the metamorphic core complex, the evolutionary degree of the source rock and the difference of geothermal gradient in the Kuche depression reveals the appearance of the metamorphic core complex may be the immediate cause. It is the existence of the metamorphic core complex that causes the different degree evolution of the hydrocarbon source rock in different areas and also controls the lateral changes of the hydrocarbon phases. The matching connection between the effective hydrocarbon source rock in Jurassic and the other factors of formating-resource in Kuche is also influenced by the time of formation of the metamorphic core complex.
Key words： Kuche depression; Natural gas; Metamorphic core complex; Earth temperature
ZHANG Bo;ZHAO Li-bin;TANG Yan-gang; LI Jiang-hai;WANG Yue-ran;CAO Chang-cheng;MA Yu-jie . PRELIMINARY DISCUSSION ON GEOLOGICAL DISTRIBUTION OF METAMORPHIC CORE COMPLEX AND HYDROCARBON INKUCHE DEPRESSION[J]. Natural Gas Geoscience, 2007 , 18(2) : 200 -203 . DOI: 10.11764/j.issn.1672-1926.2007.02.200
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