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溱潼凹陷的形成演化具有先压后张的应力机制。本文在应力演化模拟基础上，阐述了其断坳转化过程，并根据J．D．Lowell的方案，把溱潼凹陷的构造样式分成与断陷活动有成因联系的基底卷入型和盖层滑脱型两类，阐述了它们各自的构造圈闭类型和油气成藏特征。
The formation and evolution of Qintong sag has the stress mechanism of pre-stressing and post-tensioning. Based on the stress evolution simulation, this paper expounds the process of its breakaway conversion. D. Lowell’s scheme divides the tectonic style of the Qintong sag into two types: baso-intrusion type and caprock slip type, which are genetically linked with faulted activity. Their respective structural trap types and hydrocarbon accumulation characteristics are described.