| Summary: | The Miocene marine source rock is the main oil and gas supplier of the Yinggehai Basin and the typical representative of the Cenozoic marine source rocks in China.Based on comprehensive analysis of geological, geochemical and paleontological data and the study of the geochemical characteristics of the source rocks, the paper discusses the main controlling factors and establishes models of the development of the Miocene marine source rocks in Yinggehai Basin.The results show that medium-good Miocene marine source rocks are developed with strong lateral and vertical heterogeneity in Yinggehai Basin.And the Miocene marine source rocks in Yinggehai Basin are influenced by paleoclimate, paleoproductivity, water medium conditions, sedimentation rate and sea level changes.Two models of the type of marine terrestrial source represented by Meishan Formation and Sanya Formation in Yingdong slope belt and the type of marine endogenous type represented by Meishan Formation in Dongfang area and Ledong area are developed, in contrast, the latter hydrocarbon generation conditions are more excellent.
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