东濮凹陷是一个新生代裂陷盆地，古近纪为裂陷期，形成各种各样的褶皱构造及具有潜力的圈闭构造。本文在地震资料解释基础上，对东濮凹陷褶皱类型进行划分，讨论褶皱形成机制和油气地质意义。东濮凹陷古近纪褶皱，按照褶皱轴向与断层走向关系分为纵向、横向和斜向褶皱；按照褶皱与断层的成因联系，可划分为断弯褶皱、断展褶皱和变换褶皱等。褶皱作用分三个时期，即始新世、渐新世和始新世–渐新世。褶皱的形成机理为顺层剪切滑动和切层剪切滑动。褶皱的形成与断层紧密相关，是断面形态、断层多期活动和断层位移变化的结果。东濮凹陷油气圈闭与褶皱存在直接或间接的关系。%The Dongpu Sag is a Cenozoic rift-depression basin developed in the Paleogene, within which the folds are plausible loci for petroleum exploration. Based on seismic interpretation, the folds were classified. Folding mechanisms were analyzed and the implication of folds in petroleum was discussed. Many extensional folds in the Dongpu Sag formed in the Paleogene. In terms of the geometric relationship between the folds and their master faults, the folds can be divided into longitudinal, transversal and oblique ones. According to the main controlling factors, the folds can be divided into fault-bend, fault-propagation and transfer. There were three folding stages, the Eocene, the Oligocene and the Eocene-Oligocene. The folds were formed through bed-parallel shear and bed-across shear as the results of changes in geometry, poly-phase activity, and displacement of the faults. The oil and gas traps in the Dongpu Sag were associated with the folds.
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