开鲁盆地陆东凹陷交力格地区九佛堂组精细构造解释及沉积相研究

发布时间：2018-06-05 10:11

本文选题：陆东凹陷 + 交力格地区　；参考：《东北石油大学》2017年硕士论文

【摘要】：陆东凹陷位于陆家堡坳陷之内,是依托于陆家堡坳陷一个次级大地构造单元。陆家堡坳陷位于内蒙古自治区,是一个形成于中生代的坳陷,其基底是海西时期形成的褶皱。陆东凹陷内发育两个生油洼陷即交力格洼陷和库伦塔拉洼陷。交力格地区主要目的层位为九佛堂组,随着二次三维地震采集的开展,对该地区进行精细构造解释以及沉积相的研究对于油气勘探开发具有重要意义。本论文充分利用了研究区的二次三维地震资料,结合构造地质学、层序地层学等先进理论,从地震合成记录的制作、层位标定等基础工作入手,进而完成了研究区层序地层格架的搭建。应用地震剖面解释技术、水平切片解释技术、相干体识别技术等,完成了研究区精细构造解释工作。对研究区的边界断层、研究区内部发育的大小断层以及研究区内发育的有利的圈闭进行了落实,为勘探目标的优选提供了充足的资料。通过构造特征研究发现:交力格地区具有典型的东断西超箕状断陷特征,主要受东西向边界断层及一系列北东向断层控制,发育五个二级构造带,整体表现为北高南低、西低东高的构造特点。在精细构造解释的基础上,采用“点—线—面”研究思路对研究区目的层位的沉积相展开研究。首先通过对研究区重点井进行单井相的分析,进而选取骨架剖面进行重点井连井相分析,结合地震属性与地震相,完成了研究区目的层组沉积相图的绘制,并与反演成果进行了比较。通过对研究区目的层段的综合考虑分析,最终优选出6个有利勘探目标。
[Abstract]:Londong sag, located in Lu Jiabao depression, is based on a secondary tectonic unit in Lijiabao depression. Lonipu depression is located in the Inner Mongolia Autonomous Region. It is a depression formed in Mesozoic, its basement is the folds formed in the Hercynian period. Two oil subsag in londong sag, namely, the cross depression and the Kulun Tara depression, are developed in the londong sag. The main purpose of the region is the nine Buddha Hall group. With the development of the two 3D seismic collection, the fine structural interpretation and the study of the sedimentary facies are of great significance to the exploration and development of the area. This paper fully utilizes the two three-dimensional seismic data in the study area, combined with the advanced theory of tectonic geology, sequence stratigraphy and so on. On the basis of the basic work of seismic synthesis record and stratigraphic calibration, the sequence stratigraphic framework of the study area has been completed, and the detailed interpretation technology of seismic section interpretation, horizontal slice interpretation and coherent body recognition have been completed, and the boundary faults in the study area and the internal development of the study area have been completed. Large and small faults and favorable traps developed in the study area have been implemented to provide sufficient information for the optimization of exploration targets. Through the study of structural characteristics, it is found that the area of the cross area has typical characteristics of the East fault West skip like fault, mainly controlled by the East-West boundary fault and a series of north-east faults, and developed five two grade structures. The overall performance is the structural characteristics of the North High South low and the west low East high. On the basis of the fine structure interpretation, the "point line to surface" method is used to study the sedimentary facies of the target horizon in the study area. According to the seismic attributes and seismic facies, the sedimentary facies map of the target strata in the study area is drawn and compared with the inversion results. By the comprehensive consideration and analysis of the target strata of the study area, 6 favorable exploration targets are finally selected.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P631.4

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