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含油气盆地的油气勘探前景首先取决于次级凹陷的生烃能力，这与凹陷的性质及充填序列有密切的关系。汤原断陷发育八个次级凹陷，由于基底性质及基底控制的断裂活动性的差异，导致了多种类型的沉积和地层充填特征。通过分析汤原断陷各次级凹陷形成演化规律和地层充填序列，总结出了欠补尝型、补尝型和补尝－欠补尝过渡型三种类型的次级凹陷和地层充填模式，并通过对每一种凹陷的烃源岩发育情况及生储盖组合特征进行分析，预测了各种类型凹陷的油气勘探前景。
The prospect of oil and gas exploration in petroliferous basins depends first and foremost on the hydrocarbon generation ability of secondary depressions, which is closely related to the nature of depressions and filling sequence. There are eight secondary depressions developed in the Tangyuan depression, which led to many types of sedimentary and stratigraphic filling characteristics due to differences in basement and basement-controlled activity. By analyzing the formation and evolution of secondary depressions in the Tangyuan fault depression and the sequence of formation filling, three types of secondary depressions and formation filling patterns, such as under-tasting, up-tasting and up-tasting transition, are summarized. And by analyzing the development of each source rock and the characteristics of reservoir-cap assemblage, the prospect of oil and gas exploration for various types of sags is predicted.