单断式盆地充填模式与油气聚集──东濮凹陷东南部实例分析  

Sedimentary Filling Models and Hydrocarbon Accumulations in Half-graben Basin -An Example fram the Southeast Dongpu Depression

作　　者：金强[1] 信荃麟[1] 王伟锋[1] 

机构地区：[1]石油大学

出　　处：《沉积学报》1994年第4期118-123,共6页Acta Sedimentologica Sinica

摘　　要：在东濮凹陷东南部的盆地构造岩相带分析中，发现单断式盆地有三种对沉积体系、油气分布及盆地本身演化具有控制作用的正断层：犁式边界断层、箕式边界断层和多米诺式断层。它们分别形成了犁式河湖充填模式、箕式扇体充填模式和多米诺式三角洲—重力流充填模式；前者制约着生油洼陷的发育和盆地的生油潜力，后两者主要控制着油气聚集区的发育。The marginal listric fault, planar kink fault and Domino faults were found in the analysis of the teCtonic lithofacies in the Southeastern part of the Dongpu Depression, which was one of typical half-graben basins in China. These fsults impressed significantly on the evolution of the basin itself, on the develOPment of the depositional systems and the distribution of bydrocarbons. The crest -cut faults of the east border of the Dongpu Depression consist of the listric faults with NE trend and the panar kink fsults with NNE trend, which have controlled the formation the evolution of the Depression. The listric faults were formed by the regionally extendonal stress field. They were long -active ones, and the dddp op or oil source centers were developed along the listric faults. The longer fault strike and longer active time the listric faults, the larger and deeper the sags. There are three listric faults in the Lan-liao fault at the eastern margin of the Southeastern Dongpu Depression, and three oil source centers along the faults, which are respectively ;the Geganji North Sag, the Geganji South Sag and the Guyan Sag. The listric fault in the middle was the longest in its strike and throw, consequently, the Geganji South Sag was the largest one of the three. The marginal planar ink faults were the formed in regionally extensional stress field, but their bases of the upfaulted block were broken into several parts to form the step-planar kink faults, in which the rising bases evolved into batted hills. Although the planar kink faults and the listric fsults influenced on the evolution of the Dongpu Depression, the down-fauited blocks of the planar kink faults often conducted as the seperating zones by large volumes of sediments of allovial fan, delta - fan and subaqueous fan. Because there are a lot of reservoir sandbodies and various fault traps or lithological traps with in the down-fault block sediments, the blocks are significant hydrocarbon accumulation areas in the half-graben basins. The Baimiao Structure loca

关 键 词：单断式盆地 充填模式 油气聚集 

分 类 号：P618.130.2[天文地球—矿床学]