Oil Source of Reservoirs in the Hinterland of the Junggar Basin |
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Authors: | Li Wei Zhang Zhihuan Yang Yongcai and Meng Xianlong |
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Affiliation: | 1. International Petroleum Exploration and Production Company, Sinopec, Beijing 100083, China;Key Laboratory of Hydrocarbon Accumulation, Ministry of Education, China University of Petroleum, Beijing 102249, China 2. Key Laboratory of Hydrocarbon Accumulation, Ministry of Education, China University of Petroleum, Beijing 102249, China 3. West China Branch of Instititute of Exploration and Development, Sinopec, Urumqi, Xinjiang 830011, China |
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Abstract: | Through oil-oil and oil-source correlation and combined with the comprehensive study of hydrocarbon generation and accumulation history, the oil sources of typical reservoirs of different geologic periods in the hinterland of the Junggar basin are revealed. It is concluded that the crude oils in the study area can be classified into four types: The oil in the area of well Zhuang-1 and well Sha-1 belongs to type-I, which was generated from Cretaceous to Paleogene (K-E) and its source rocks are distributed in the Fengcheng formation of the Permian in the western depression to the well Pen-1. The oil in the area of well Yong-6 (K1tg) belongs to type-II, which was generated from Cretaceous to Paleogene and its source rocks are distributed in the Wuerhe formation of the Permian in the Changji depression. The oil in the area of well Yong-6 (J2x) belongs to type-III, which was generated at the end of the Paleogene and its source rocks are distributed in the coal measures of the Jurassic in the Changji depression. The oil of well Zheng-1 and well Yong-1 belongs to type-IV, which was generated in the Paleogene, and its source rocks are distributed in the Wuerhe formation of the Lower Permian and coal measures of the Jurassic. It is indicated that the hydrocarbon accumulation history in the study area was controlled by the tectonic evolution history of the Che-Mo palaeohigh and the hydrocarbon generation history of well Pen-1 in the western depression and Changji depression. |
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Keywords: | Oil source correlation hydrocarbon accumulation history Che-Mo palaeohigh Junggar basin |
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