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| ORGANIC GEOCHEMISTRY OF THE SOURCE ROCKS OF LOWER JURASSIC WUDANGGOU FORMATION IN SHIGUAI BASIN, INNER MONGOLIA |
| FENG Yan, YANG Cai, GUO Jia-cheng, XIA Ning, LIN Hai-tao |
| Inner Mongolia Institute of Geological Survey, Hohhot 010020, China |
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Abstract Dark mudstone and shale of Lower Jurassic Wudanggou Formation are well developed in the Shiguai Basin in Inner Mongolia. Based on geological exploration, typical profile survey, sampling and experimental analysis, the organic geochemical studies are conducted in the aspects of organic matter abundance, kerogen types and maturity of organic matter to evaluate the hydrocarbon potential. The total organic carbon (TOC) contents of the Lower Jurassic hydrocarbon source rocks of Wudanggou Formation range from 0.7% to 12.4%, corresponding to organic matter type of Ⅱ2-Ⅲ. The vitrinite reflectance is between 0.47% and 0.71%, indicating that the hydrocarbon source rocks mostly achieved low mature stage of evolution. The Wudanggou Formation is the important hydrocarbon source rock in the central area of Inner Mongolia, with potential of unconventional energy of shale gas.
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Received: 02 February 2015
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2016, Vol. 25 
