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油气源条件关系到不同油气藏类型油气的富集程度。通过分析西湖凹陷平湖地区平湖组煤、炭质页岩及泥岩等烃源岩的有机质丰度、类型及成熟度等指标,认为该区平湖组不具备油气源条件。通过油气源对比及对前人资料的综合类比分析发现,平湖地区聚集的油气同源,且为二期成藏,主要来自东部三潭深凹陷,为源外油气藏。油气源条件决定了平湖地区主要发育构造油气藏,且由于不同部位的构造圈闭捕获油气的能力存在差异,造成油气充满度有所不同;对于岩性圈闭,只有存在断层或其他运移通道沟通油源时才能成藏。因此,在今后的部署工作中,要结合研究区的油气源条件,多角度分析不同类型圈闭成藏的可能性和富集程度。
The hydrocarbon source conditions are related to the degree of enrichment of different hydrocarbon types. By analyzing the organic matter abundance, type and maturity of the source rocks such as coal, carbonaceous shale and mudstone of Pinghu Formation in Pinghu area of Xihu Depression, it is considered that the Pinghu Formation does not have hydrocarbon source conditions. Comparisons of hydrocarbon sources and comprehensive analogies of previous data show that the accumulated oil and gas in Pinghu area are of the same type and are of second-stage accumulation, mainly from the eastern part of Santan deep depression, which is the source-source reservoir. The conditions of oil and gas source determine the main developed reservoirs in Pinghu area. Due to the difference in ability to trap oil and gas in different parts of structural traps, the filling degree of oil and gas is different. For the lithologic traps, there are only faults or other migration channels To communicate when the oil source to accumulate. Therefore, in the future deployment work, the possibility and enrichment of different types of trap accumulation should be analyzed from multiple perspectives in combination with the hydrocarbon source conditions in the study area.