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根据岩石热解参数、可溶有机质氯仿沥青“A”、总烃转化率及饱和烃生标物参数,综合分析和研究了板桥凹陷古近系烃源岩自然演化剖面特征及成烃规律。结果表明板桥古近系烃源岩总体上存在2500～2800m和3200～4300m两个成烃主带,主峰位置分别位于2750m和3950m左右,其中后者为主要成烃带。此外,根据BS35井Es3资料,在异常高压带内存在液烃演化滞后特征,也即在类似的地质条件下,液烃分布深度范围加大。
According to the parameters of rock pyrolysis, soluble organic matter chloroform bitumen “A ”, the total hydrocarbon conversion rate and the parameters of saturated hydrocarbon bio-standard, the characteristics of natural evolution of Paleogene source rocks and hydrocarbon generation law. The results show that there are generally two major hydrocarbon-forming dominant zones of 2500 ~ 2800m and 3200 ~ 4300m in the Paleogene source rocks in Banqiao, with the main peak located at 2750m and 3950m respectively, of which the latter is the major hydrocarbon generation zone. In addition, based on the data from Es3 of Well BS35, there is a characteristic of lag evolution of liquid hydrocarbons in the abnormal high pressure zone, that is, under similar geological conditions, the depth of liquid hydrocarbon distribution increases.