歧口凹陷构造成因类型

The Causes Type of Structure in Qikou Sag

歧口凹陷埋藏深度深,剩余资源量多,勘探潜力大,具备了形成大型油气田的石油地质条件。歧口凹陷典型构造成因类型分为构造成因和坡折成因两种,构造成因分别为差异沉降和断块掀斜构造、重力滑脱褶皱构造、走滑扭动构造三种成因,坡折带成因分别为构造坡折带、断裂坡折带、挠曲坡折带、沉积坡折带、侵蚀坡折带、古地貌坡折带构造六种成因。

Qikou sag of Dagang oilfield is located very deeply beneath the earth, and there is more remaiuing resource, and great potential in exploration. It is very possible to find a large oil and gas fields in such geological structure. Genetic types of typical structure of Qikou sag can be divided into two： structural causes and slope break causes. Structural causes can be divided into three types： the differential settle- ment and tilt block structure, the gravitational decollement fold structure, and the strike- slip shear structure. Slope break belt causes can be divided into six types： the structure slope break belt, the fracture slope break belt, the deflection slope break belt, the sedimentary slope break belt, the erosion slope break belt, and the ancient landform slope break belt.