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2012•Journal of Lanzhou UniversityRequires access

Hydrocarbon source evaluation and oil source contrast of the triassic system in southwest margin,Ordos basin

Yande Zhao, Luo Anxiang, Sun Bai-nian, Zhang Zhong-yi, Cheng Dangxing

Open publisher page 7 citations

Abstract

Based on the methods of organic petrology and GC-MS,Triassic Chang 7 mudstone and Chang 8 crude oil were collected from the southwestern margin of the Ordos basin for a geochemical fine quantitative analysis.The geochemical characteristics of the hydrocarbon source and the hydrocarbon generating potential were discussed.The results showed that Chang 7 mudstone is still a major source rock in the study area with a high organic matter abundance,good types and characteristics of high maturity.At the same time,the geochemical features of the Chang 8 crude oils were investigated.Chang 8 crude oil and Chang 7 source showed similar characteristics in the aspects of resource properties,sedimentary environment and maturity.Therefore, Chang 8 crude oil mainly derived from the source rocks of the seventh members of the Yanchang formation in the southwestern margin of the Ordos basin.

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What this paper is about

Based on the methods of organic petrology and GC-MS,Triassic Chang 7 mudstone and Chang 8 crude oil were collected from the southwestern margin of the Ordos basin for a geochemical fine quantitative analysis.The geochemical characteristics of the hydrocarbon source and the hydrocarbon generating potential were discussed.The results showed that Chang 7 mudstone is still a major source rock in the study area with a high organic matter abundance,good types and characteristics of high maturity.At the same time,the geochemical features of the Chang 8 crude oils were investigated.Chang 8 crude oil and Chang 7 source showed similar characteristics in the aspects of resource properties,sedimentary environment and maturity.Therefore, Chang 8 crude oil mainly derived from the source rocks of the seventh members of the Yanchang formation in the southwestern margin of the Ordos basin.

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Available abstract

Based on the methods of organic petrology and GC-MS,Triassic Chang 7 mudstone and Chang 8 crude oil were collected from the southwestern margin of the Ordos basin for a geochemical fine quantitative analysis.The geochemical characteristics of the hydrocarbon source and the hydrocarbon generating potential were discussed.The results showed that Chang 7 mudstone is still a major source rock in the study area with a high organic matter abundance,good types and characteristics of high maturity.At the same time,the geochemical features of the Chang 8 crude oils were investigated.Chang 8 crude oil and Chang 7 source showed similar characteristics in the aspects of resource properties,sedimentary environment and maturity.Therefore, Chang 8 crude oil mainly derived from the source rocks of the seventh members of the Yanchang formation in the southwestern margin of the Ordos basin.

Key concepts: Source rock, Geology, Structural basin, Maturity (psychological), Geochemistry, Hydrocarbon, Margin (machine learning), Sedimentary rock

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Hydrocarbon source evaluation and oil source contrast of the triassic system in southwest margin,Ordos basin — Research Paper | ScholarLens