南黄海盆地北凹多幕正反转构造特征及其动力学分析

发布时间：2018-02-26 12:30

本文关键词： 正反转构造构造样式构造演化南黄海盆地　出处：《现代地质》2017年03期 　论文类型：期刊论文

【摘要】：利用重处理的二维地震测线对南黄海盆地北凹进行了精细的构造解释,揭示了三种不同类型的正反转构造样式,分别是中南部的逆冲型、东部的压扭型和北部的褶皱型,主要受控于其所处的不同构造位置。通过典型地震测线的平衡剖面分析,并结合区域构造动力学背景分析,认为北凹至少发生了三幕构造正反转,主要受控于不同地质时期太平洋板块对欧亚大陆俯冲速度和角度的改变。其中,三垛组沉积之后,太平洋板块俯冲角度逐步由北西向转为南西西向,并且俯冲速度明显增大,使得北凹处于北东南西向挤压环境中,广泛发育正反转构造,这也是最强烈的一幕正反转,表现为强烈的逆断层活动和地层剥蚀。过度的正反转作用可能对北凹油气藏的形成造成了不利的影响。
[Abstract]:The fine structural interpretation of the northern depression of the southern Huang Hai basin has been carried out by using the reprocessed two-dimensional seismic survey lines, and three different types of positive and reverse structural patterns have been revealed, namely, the thrust type in the central and southern part, the compression-torsional type in the east and the fold type in the northern part of the basin. Based on the analysis of the equilibrium profile of the typical seismic survey line and the analysis of the regional tectonic dynamic background, it is considered that at least the positive and negative turn of the three-act structure occurred in the northern depression. It is mainly controlled by the change of the velocity and angle of the Pacific plate to the Eurasian continent in different geological periods. After the deposition of the Triple formation, the subduction angle of the Pacific plate gradually changes from NW to NW, and the subduction velocity increases obviously. The north depression is in the NSE westward compression environment, and the positive and reverse structures are widely developed. This is also the strongest positive and negative turn. It is shown by strong thrust fault activity and strata denudation, and the excessive positive and negative effects may have an adverse effect on the formation of the North Depression oil and gas reservoir.
【作者单位】：中海油研究总院;
【基金】：国家科技重大专项“中国近海富烃凹陷优选与有利勘探方向预测”(2016ZX05024-002)
【分类号】：P618.13;P736.1

【相似文献】