Discussion on the Origin of Heavy Oil and Reservoir Formation in Permian System of TurpanHami Basin
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摘要: 针对吐哈盆地火焰山中央带二叠系稠油勘探最新进展,依据地质、地球化学分析资料开展区带稠油成因、成藏研究,提出盆地胜北洼陷为中央带稠油主力供源区、生物降解改造是原油稠化的主导因素、火8井三叠系稠油油藏于中侏罗世西山窑沉积期末形成,通过对英2、4井上二叠统、中侏罗统七克台组油藏非均质性的揭示,阐述该类油藏“二次充注”的成因模式。Abstract: In the light of the latest heavy oil exploration progress in the Permian formation of Huoyanshan central zone, TurpanHami basin, this study on heavy oil origin and reservoir formation is carried out based on geologic and geochemical data. It is concluded that Shengbei depression is the major source area for the central heavy oil zone, biologic degradation is the major cause of the oil thickening, and the Triassic heavy oil reservoir in Well H8 was formed at the end of Xishanyao depositional stage in MidJurassic epoch. In addition, the forming mode of this kind of reservoirs “secondary influx” is described through revealing the heterogeneity of the reservoir of Upper Permian and MidJurassic system in Well Y2 and Y4
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Key words:
- TurpanHami basin /
- heavy oil /
- origin /
- reservoir formation /
- biomarker /
- biodegradation
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