【摘要】 鄂尔多斯盆地镇泾地区侏罗系地层以三角洲-湖泊沉积体系为主,研究区范围内主要发育主河道和部分分流河道砂体。研究区构造平缓,主要为单斜地层、在东南部存在大型鼻状构造。通过对主要储层段(长6、8油层组)砂体分布及与构造之间关系进行研究,分析砂体走向与构造线方向的关系认为在构造单斜地区,当两者相交时(交角β≠0)是形成圈闭的关键因素之一,在大型鼻状构造地区因构造线的弯曲与河道砂体组合可以形成圈闭。根据研究区砂体分布和构造线组合出4种地层-岩性及岩性圈闭。利用构造图与砂体分布图对主要储层段存在的圈闭确定出长6、8油层组10个层圈闭。更多还原

【Abstract】 The Jurassic stratum in Zhenjing region of Ordos basin is mainly of deltaic-lake sedimentary system. Main stream channel sand body and distributary stream channel sand body occurred in the area.The attitude of bedding in the area is gentle,reflecting basically a monocline feature.In the southeast of the area,there exists a large-scale nose-like structure. The relation between the distribution of the sand body of the main oil-bearing formation (Chang 6 and Chang 8 Formation) and the structure is studied in detail. Analysis of strikes of the sand body and the structures indicates that the intersection of the 2 strikes is a key factor in the formation of trap.The combination of curvature of structural lines in the locality of nose-shape structure with the sand body results in the trap formation.Accordingly,four types of stratigraphic-lithologic traps and lithologic traps are proposed and ten intra-formational traps in Chang 6 and Chang 8 Formation are determined.更多还原