大民屯凹陷源控油气作用及资源潜力预测

研究了大民屯凹陷有效烃源岩对油气的来源特征、主要成藏期次、油气分布范围和资源潜力的控制作用。大民屯凹陷分为上下两套成藏组合，共划分10个成藏体系。应用地质门限控烃理论计算了各个成藏体系的排烃量、可供聚集烃量、远景资源量和剩余资源量。结果表明，大民屯凹陷总的剩余资源量为1.9?08t，其中上部成藏组合中的成藏体系Ⅰ剩余资源量达0.559?08t，下部成藏组合的成藏体系Ⅵ剩余资源量达0.543?08t，这两个成藏体系是最有利的勘探区带。

Hydrocarbon-Controlling Function of Source Rock and Resource Potential in the Damintun Depression

The controlling function of source rock on hydrocarbon accumulation are studied including these influences such as source characteristics,hydrocarbon accumulation period,distribution extent and potential resource of oil and gas in the Damintun depression.There are two sets of reservoir-forming combination,which are divided into ten petroleum accumulation systems in the Damintun depression.Hydrocarbon expulsion quantity,probable hydrocarbon-accumulating quantity,prospective resources and remaining resources are calculated by the theory and method of geologic thresholds.The results show that the remaining total resources is 1.9×108 t in the Damintun depression,the remaining resource of the petroleum accumulation system Ⅰ in the upper reservoir-forming combination is 0.559×108 t and that of the petroleum accumulation Ⅵ in the under reservoir-forming combination is 0.543×108 t.These two petroleum accumulation systems are the most favorable exploration region.