The source of gas and oil in Cainan oilfield Jurassic layers of Junggar Basin |
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Authors: | Hongliang Zou Wen Qiu Bo Yuan Bingyan Wu Zhengzhou Hu |
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Affiliation: | 1. Research Institute of Petroleum and Development in Xinjiang, Urumqi, China;2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China |
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Abstract: | The aim of this paper is to analyze natural gas, light hydrocarbons, and biomarkers by the whole hydrocarbon geochemistry to figure out controversial source of Cainan oilfield. Dry gas and oil reservoirs in Baijiahai suggest multi-stage accumulation of mature and high-over mature gas from widely distributed methane carbon isotope and humic, which are products of heavy ethane carbon isotope. The natural gas in Fubei slope area is typical mature wet gas. According to regional structural and evolution features, high-over mature gas in Baijiahai originates from Carboniferous source rocks of Dongdaohaizi sag, while mature crude oil is a mixture of Jurassic and Pingdiquan formation of Permian. |
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Keywords: | Cainan oilfield Junggar Basin oil-source correlation origin of oil and gas whole hydrocarbon geochemistry |
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