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陆源有机质是板桥凹陷下第三系沙河街组油气主要的原始生烃母质,细菌对沉积有机质的降解改造利于提高其“腐泥化”程度,早期生成低熟油。细菌成因短链烷烃是形成板桥凝析油和原油轻烃的主要物质基础,一定的热成熟度和地层温度、压力环境是形成凝析油气的外在条件。
The terrigenous organic matter is the primary hydrocarbon generating parent hydrocarbon of the Tertiary Shahejie Formation in Banqiao sag. Degradation of the organic matter by bacteria improves the degree of “saproperating” and early formation of low-mature oil. Bacterial causes Short-chain paraffins are the main material basis for the formation of Banqiao condensate oil and crude oil light hydrocarbons. A certain degree of thermal maturity and formation temperature and pressure environment are the external conditions for the formation of condensate gas.