塔木察格油田N区块Z油层组沉积相特征研究

发布时间：2018-05-02 01:39

本文选题：塔木察格油田 + 断陷盆地　；参考：《东北石油大学》2017年硕士论文

【摘要】：塔木察格油田N区块属于东断西超的复式断陷结构,区块内断失、剥蚀等地层缺失普遍存在、标志层不明显,小层对比难;物源多、相变快、多期扇体叠置,沉积微相展布刻画难;目前尚未针对全区进行统一的精细油藏描述工作。需要在全区范围内开展层序划分和地层格架研究、沉积相类型及其展布特征研究,以及沉积相特征对储层控制作用的研究。本论文通过在全区建立“四级”标志层体系,统一各断块的分层界限,并以此为基础开展全区分层对比工作,建立起全区统一的地层格架,实现全区统层;首次开展全区范围内沉积特点研究,借鉴前人研究成果,建立起全区沉积相模式,采用“三步法”绘制流程,首次绘制完成N区块Z油层组14个沉积单元的全区沉积微相图,总结出全区沉积相展布特征。结果表明研究区属于近岸水下扇沉积模式,总结出3种亚相、5种微相,并分别确定各微相的岩性及电性特征;沉积展布特征为西部、东部双物源,中间大面积发育湖相,浊积相零星分布与湖相;进一步总结出优势相主水道和辫状水道发育特点,及其对优势储层的控制作用。
[Abstract]:The N block in Tamchage Oilfield belongs to the complex fault depression structure of the east fault and the west superimposed. The fault loss and erosion in the block are common, the marker layer is not obvious, the correlation of the small layers is difficult, the material source is many, the phase transition is fast, and the multi-stage fan body is superimposed. The distribution and characterization of sedimentary microfacies is difficult and there is no uniform fine reservoir description for the whole area. It is necessary to study the sequence division, stratigraphic framework, sedimentary facies types and their distribution characteristics, and the controlling effect of sedimentary facies characteristics on reservoir in the whole area. In this paper, through the establishment of "four levels" mark layer system in the whole area, unifying the stratification boundary of each fault block, and taking this as the foundation to carry out the stratification contrast work of the whole area, establish the unified stratigraphic framework of the whole area, realize the whole area series layer; The sedimentary characteristics of the whole area are studied for the first time, and the sedimentary facies model of the whole area is established by referring to the previous research results. The process of "three-step method" is used to draw the sedimentary microfacies diagram of 14 sedimentary units of Z reservoir formation in N block for the first time. The distribution characteristics of sedimentary facies in the whole area are summarized. The results show that the study area belongs to the near-shore underwater fan sedimentary model, three subfacies and five microfacies are summed up, and the lithologic and electrical characteristics of each microfacies are determined respectively. The distribution of turbidite facies and lacustrine facies are sporadic, and the development characteristics of main waterway and braided waterway of dominant facies are summarized, and their controlling effect on dominant reservoir are summarized.
【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

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