Abundant oblique slip faults characteristic of the torsion structures occur in the Tertiary cap rocks of the Huanghua depression. The torsion structures in the depression comprise two types: translational structures and rotation-torsion structures. The former appear in the areas bounded by the Cangdong fault, Xuxi fault, Nanpibei-Yanshan concealed fault and Zaopo-Guxian concealed fault, and display the structural patterns of the -type, en echelon and " S" shapes. The latter appear dominantly in the Wumaying region in the southern part of the Nanpibei-Yanshan concealed faults, and secondly in the Shenusi region on the downthrown side of the Cangdong fault. The tenso-shear fault systems may exercise an important control on the formation of traps and faulted zones, vertical migration of hydrocarbons, and different controls on hydrocarbon accumulation.%在研究黄骅坳陷断裂系统的基础上,通过力学分析认为黄骅坳陷在第三系盖层中极难出现明确的走滑断裂,但形成大量斜向滑动断层,具有典型的扭动构造特点.扭动构造包括直扭型和旋扭型两种,其中沧东断裂、徐西断裂、南皮北-盐山隐伏断裂以及皂坡-故县隐伏断裂带所围限的区域以发育直扭型构造样式为主,组成“λ”字形、雁列.式及“S”形断裂构造样式等.在豫冀鲁巨型帚状构造体系和边界大断裂共同作用下,以南皮洼陷为漩涡中心,形成帚状旋扭构造样式.这一旋扭构造样式在南皮北-盐山隐伏断裂带南部的乌马营地区表现最为明显,其次为沧东断裂下降盘的舍女寺地区,平面上呈向南西方向收敛、向北东方向撒开,在沙二段、沙三段地层最为明显.张扭性断裂系统对油气聚集的重要控制作用主要表现为圈闭和断裂构造带形成、油气垂向运移通道作用以及控油性差异等3个方面.
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