Geochemical Characteristics and Genetic Identification of Light Hydrocarbon generated in the Thermal Pyrolytic Experiments of Source Rocks from the East of Kuqa Depression,Tarim Basin
Received date: 2014-08-26
Revised date: 2015-01-10
Online published: 2015-06-10
Two sets of source rocks existed in the Triassic and Jurassic formations in the eastern part of Kuqa Depression,Tarim Basin.These two sets of source rocks have similar deposition environment and genetic types.How to identify these two sets of source rocks has always been a problem of the geochemical research.The online analytic technique of thermal pyrolytic light hydrocarbon was used to analyze the light hydrocarbon of produced in the pyrolytic experiment of source rocks from the east part of Kuqa Depression.Both of the source rocks in Triassic and Jurassic formations are typically terrestrial origin and can be identified by the relative percentage of branched alkanes and aromatic hydrocarbon.The relative content of branched alkanes in Triassic source rocks is mainly between 28%-38%,and it is 10%-27% in the Jurassic source rocks.The relative content of the aromatic hydrocarbon in Triassic is mainly between 5%-25%,and it is 20%-65% in the Jurassic.Research results have important guiding significance on the hydrocarbon accumulation theory and exploration and production deployment of the eastern Kuqa Depression.
LU Bin,LI Jian,RAN Qi-gui,LIN Tong,LI De-jiang,LIU Wei-hong . Geochemical Characteristics and Genetic Identification of Light Hydrocarbon generated in the Thermal Pyrolytic Experiments of Source Rocks from the East of Kuqa Depression,Tarim Basin[J]. Natural Gas Geoscience, 2015 , 26(6) : 1129 -1136 . DOI: 10.11764/j.issn.1672-1926.2015.06.1129
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