车镇凹陷大王庄地区沙二段沉积微相研究

发布时间：2018-06-07 00:46

  本文选题：车镇凹陷 + 大王庄油田　； 参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：大王庄油田位于车镇凹陷南部,构造上处于大王北洼陷和义和庄凸起之间的斜坡带,沙二段是其主力含油层系,具有非常好的勘探潜力。然而,区内大2、大5、大13、大18等块缺乏系统的地质统层和储层研究,沉积相变化快、成藏规律认识不够清楚,勘探进入徘徊期。针对工区勘探现状,本文在总结前人研究成果的基础上,对研究区沙二段沉积微相、储层特征及油气分布规律进行了系统研究。本文研究将大王庄地区沙二段划分为4个砂层组和21个小层,其中四砂组与下伏地层沙三段呈角度不整合接触。从整体来看,大王庄沙二段地层具有北厚南薄、东厚西薄的特点,而且在研究区中北部断失较明显。大王庄沙二段属滨浅湖滩坝发育区,主要发育有坝主体、坝侧缘、滩脊、滩席和泥微相等沉积微相类型。滩砂和坝砂在平面上连续成片分布,纵向上相互叠置,横向连通性好。沙二段滩坝储层岩性以粉砂岩和细砂岩为主,主要发育中孔中渗和中孔低渗储层,可分为Ⅰ类储层、Ⅱ类储层和Ⅲ类储层。Ⅰ类储层和Ⅱ类储层是孔渗性较好的储层,主要分布于坝砂中。大王庄沙二段滩坝油藏在平面上表现为面积小、零星发育,在垂向上表现为多薄油层发育。二砂组和三砂组为主力含油层系,发育多套薄油层。油气分布主要受油源条件、储集条件以及构造条件三大因素的控制,研究区具备了优越的运移条件,断层发育较多,储层的孔渗性较好,使该区具备了良好的油气成藏条件。通过地震剖面和圈闭预测等特征,优选了三个有利勘探目标,即大2井区断块油气藏、大5-11井区断块油气藏、大132井区背斜油气藏。
[Abstract]:Dawangzhuang oil field is located in the south of Cazhen sag and is structurally located in the slope zone between the Dawangbei depression and Yihezhuang uplift. The second member of Shahezhuang is the main oil-bearing strata and has very good exploration potential. However, there is a lack of systematic study of geological strata and reservoirs in blocks Da 2, Da 5, Da 13 and Da 18 in the region, where sedimentary facies change rapidly, the rules of reservoir formation are not well understood, and exploration enters into a wandering period. In view of the present situation of exploration in the working area, the sedimentary microfacies, reservoir characteristics and oil and gas distribution of the second member of the Shahejie formation are systematically studied in this paper on the basis of summarizing the previous research results. In this paper, the second member of the Sha member in Dawangzhuang area is divided into 4 sand formations and 21 sub-layers, in which the four sand formations are in contact with the third member of the underlying formation in an angle unconformity. On the whole, the strata of the second member of Dawangzhuang Sha formation are thick in the north, thick in the south and thin in the east and west, and the fault loss is obvious in the central and northern part of the study area. The second member of Dawangzhuang Sha belongs to the shoreline shallow lake beach and dam development area. The main body of the dam, the lateral edge of the dam, the beach ridge, the beach mat and the mud microfacies are mainly developed. The beach sand and the dam sand are distributed continuously on the plane and superimposed on each other longitudinally, and the transverse connectivity is good. The lithology of the reservoir is mainly siltstone and fine sandstone, and mainly develops mesoporous and mesoporous low permeability reservoirs, which can be divided into 鈪，

本文编号：1988912