孙虎地区源岩成烃演化动态研究

在恢复埋藏史的基础上 ,通过建立成烃演化史模型 ,计算和编制了各时期有机质的成熟度图并分析其成烃演化史。结果表明 ,孙虎地区沙三段有机质从东营组沉积末期开始进入低成熟阶段 ,局部进入成熟阶段 ,目前成熟度仍较低 ;沙四段有机质从沙一段沉积末期开始进入成熟阶段 ,至东营组沉积末期基本成熟 ,局部达高峰阶段 ;孔店组有机质从沙三段沉积末期开始进入成熟阶段 ,至东营组沉积末期全部成熟 ,部分达凝析气阶段。

DYNAMIC STUDY OF HYDROCARBON-GENERATING EVOLUTION OF SOURCE ROCK IN SUNHU AREA

Hydrocarbon generating evolution is critical for the study on hydrocarbon accumulation process.On the basis of reconstructing the buried history,the authors calculate and compile maturity maps(contour diagrams of R o)for every stage in order to analyze the hydrocarbon generating evolution.The research results show that the source rock of the third segment of the Shahejie Formation(E s 3)entered lower mature phase at the end of the Dongying Formation sedimentary period in Sunhu area,but matured in some segments;the fourth segment of the Shahejie Formation(E s 4)entered mature phase at the end of the Dongying Formation sedimentary period,but summit phase in some segments;the Kongdian Formation(E k )entered mature phase at the end of the third segment of the Shahejie Formation sedimentary period,and matured completely at the end of the Dongying Formation sedimentary period,even small part of the source rock entered condensed gas phase.