济阳坳陷东营组沉积末期正反转构造研究

Study on positive inversion structure in the end of Dongying sedimentation in Jiyang Depression

对济阳坳陷大量高分辨率三维地震资料的解释和分析,利用反转构造在地震剖面上的识别标志和不整合的发育特征等方法,确定济阳坳陷东营组沉积末期正反转构造的分布范围以及相应的反转构造样式。对坳陷正反转构造成因机制研究表明,东营组沉积末期济阳坳陷构造应力为NEE-SWW双向强挤压应力和NW-SE双向拉张应力的叠合,且构造反转的选择性造成了正反转构造样式的差异性。对坳陷正反转构造的认识可以为济阳坳陷油气勘探提供地质依据。

The distribution and structural style of positive inversion structure in the end of Dongying sedimentation in Jiyang Depression have been determined through interpretation and analysis of a large amount of high-resolution 3D seismic data by using the identification signs of inversion structure on seismic profiles as well as unconformity characteristics.The study of genetic mechanism of the positive inversion structure indicates that the tectonic stress in Jiyang Depression in the end of Dongying sedimentation is a stacking of NEE-SWW two-way strongly compressive stress and NW-SE two-way tensional stress,and the selectivity of structure inversion results in the difference in positive inversion structural styles.Proper understanding of the positive inversion structure may provide geological basis for oil and gas exploration in Jiyang Depression.