Hydrocarbon Generation History and Late Hydrocarbon Generation Potential of Neopaleozoic Marine Source Rocks in the South of Jianghan Basin
Received date: 2008-09-11
Revised date: 2009-03-12
Online published: 2009-04-10
This paper dynamically evaluates the hydrocarbon generation process of Neopaleozoic source rocks in the south of Jianghan Basin during different geologic times. Late hydrocarbon generation is especially important for the hydrocarbon filling of local structures formed in the Early Yanshan age. This paper demonstrates the existence of late hydrocarbon generation in the area based on the two respects of maturity alternation and decken/overturned sections. However, there are some differences in hydrocarbon generation between different sections and between different strata of the same section. The burial history study reveals that,there are mainly four types of burial evolution processes in the area, i.e., continuous deep burial, deep burial-denudation and planation, deep burial-uplift-deep burial, and deep burial-uplift-shallow burial, of which the former two types are of great significance to late hydrocarbon generation. The hydrocarbon generation history and the calculated results of late hydrocarbon generation potential further indicates that the late hydrocarbon generation potential of Neopaleozoic source beds is slightly higher in Dangyang area than in Chenhu area, and the hydrocarbon generation intensities both meet the standard for the formation of middle-and small-sized oil/gas fields.
Key words: Jianghan Basin; Neopaleozoic; Source rock; Late hydrocarbon generation.
WANG Shao-Hua, HU Xiao-Feng, LIN Juan-Hua, YE Jian-Zhong, XIE Jia-Ren . Hydrocarbon Generation History and Late Hydrocarbon Generation Potential of Neopaleozoic Marine Source Rocks in the South of Jianghan Basin[J]. Natural Gas Geoscience, 2009 , 20(2) : 222 -227 . DOI: 10.11764/j.issn.1672-1926.2009.02.222
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