Group classification of mixed oils in central Junggar Basin,Northwest China and their migration |
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| Authors: | Xulong Wang Xinpu Shi Jian Cao Wenfang Lan Guoliang Tao Wenxuan Hu Suping Yao |
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| Institution: | 1.PetroChina Xinjiang Oilfield Company,Xinjiang, Karamay,China;2.State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences,Nanjing University,Nanjing,China;3.Wuxi Research Institute of Petroleum Geology,SINOPEC,Wuxi,China |
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| Abstract: | The produced oils in central Junggar Basin are commonly mixed in origin. In this paper, in order to reveal this complexity
and thereby provide valuable clues to the study of oil source and formation mechanism, genetic groups of the mixed oils were
classified and their migration/accumulation was investigated. Based on the artificial oil mixing experiments, some representative
biomarkers of the mixed oils showed varying tendencies according to mixing ratios of the oils. Hence, these biomarkers are
useful for determining the origin of the mixed oils. According to the criteria, oils in the area were divided into four basic
groups, i.e., the Lower Permian Fengcheng oil, the Middle Permian Lower Wuerhe oil, the Jurassic source derived oil, and the
mixed oil (including the Lower and Middle Permian mixed oil and the Permian and Jurassic mixed oil). Oil migration and accumulation
were discussed in combination with the geological background. |
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