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lu xiang kuai duan hu pen you qi sheng cheng de di qiu hua xue mo shi
Pages: 359-370
Year: Issue:  4
Journal: Oil & Gas Geology

Keyword:  葡萄藻低成熟油两期成油论热解聚热降解;
Abstract: The basic data about continental oil generation is still the theory on thermal degrada-tion of kerogen commonly used in the world.But during the exploration of hydrocarbonin Jiyang Depression,it was found that the theory should be added and improved.A geo-chemical model of oil-gas generation in two stages—the early and .late stages—has beenproposed in this paper.The parent materials to generate oil and gas in the early stage washydrocarbon polymer parts with low chemical activity contained in some organisms livedin lacustrine basins such as hydrocarbon-rich Botryococcus braunii which containned morethan 40% soluble hydrocarbon when cultured living body and generated saturatehydrocarbon series after thermal simulation (R(?)0.30%).Two stages of thermal depolymerization and thermal degradation were divided in the late stage.low-matured oiland gas were generated in thermal depolymerization,matured and high-matured oil andgas were generated in thermal degradation.The parent materials of kerogen,favourablefor hydrocarbon generation were controlled by biology-rich zones,which would generatethe major source beds.As there are much differences in geothermal fields,the sourcethreshold would be controlled by sedimentary units in minor sags.
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