论文部分内容阅读
在前人研究的基础上,综合野外构造剖面、地震-地质解释、钻井资料等,总结出中、上扬子地区发育单层、双层和三层结构等3大类共计11小类的地质结构类型,分5个区带剖析了区内褶皱-冲断带的构造分带性与地质结构类型的展布特征,并简要讨论了不同地质结构的成因,认为地质结构类型差异与变形带内主控断层所滑脱的深度密切相关。不同的滑脱深度决定了该地质结构类型中区域盖层的剥蚀程度及断层对油气保存的性质,从而决定了其油气保存条件。其中,单层稳定结构、双层结构的深部构造、三层结构的中部构造因区域盖层保存完好、主控断层多为烃源断层而具有良好的保存条件,是油气勘探的有利构造带。
Based on the previous studies, based on the comprehensive analysis of the field structure profile, seismic-geologic interpretation and drilling data, it is concluded that there are 11 sub-categories of geological structures in the three kinds of single, double and three-layer structures in the middle and upper Yangtze region Type and zonation in five zones, the tectonic zonation of fold-thrust belt in the area and the distribution characteristics of geological structure types are analyzed. The genesis of different geological structures is briefly discussed. It is considered that the difference of geological structure type and the main deformation zone The depth of detachment of the control fault is closely related. Different slippage depth determines the denudation of regional caprock in the geological structure type and the nature of the fault on the preservation of oil and gas, which determines the conditions for oil and gas reservoirs. Among them, the monolayer stabilized structure and the deep structure of the double-layer structure have good preservation conditions for the middle caprock of the three-layer structure because the caprock is well preserved and the main controlling faults are hydrocarbon source faults, which is a favorable tectonic belt for oil and gas exploration.