大庆油田密井网区典型单元沉积微相及沉积模式

发布时间：2018-04-28 22:39

本文选题：密井网区 + 葡萄花油层　；参考：《东北石油大学》2017年硕士论文

【摘要】：在高密度井网条件下,对沉积单元进行单砂体逐级精细划分、对比,确定各开发井各单元沉积微相。根据同一单元各开发井微相确定单元平面沉积微相及单砂体空间分布,实现单砂体识别。充分利用地质、测井、以及室内试验等资料,以沉积学理论为指导,应用源控沉积体系分析技术,在大区域物源研究成果的背景下,利用密井网资料,将研究区层段进行了小层对比划分,而后建立了统一且精细的地层格架,并最终划分出19个沉积单元。提出了沉积微相的划分原则,包括分流河道微相、溢岸砂、席状砂、废弃河道等微相的测井相模式,并以此绘制出19张平面沉积微相图,同时对相图进行了相应的精确详细的描述。详细厘定研究区物源、沉积体系类型及分布。以河流-三角洲体系沉积模式为指导,从各类砂岩厚度、有效厚度、钻遇率、砂地比等方面定量刻画,以平面沉积相研究为基础,提出了连片状河道砂沉积模式、宽带状河道砂沉积模式、枝状河道砂体沉积模式、断续零散状河道砂沉积模式、零星块状河道砂沉积模式这五种模式。这为储层特征分析、储层综合评价、开发动态分析、流体分布、有利区块预测、剩余油挖潜等储层精细研究提供了更准确的地质依据。
[Abstract]:Under the condition of high density well pattern, the sedimentary units are divided into single sand bodies, and the sedimentary microfacies of each unit in each development well are determined by comparison. According to the microfacies of each development well in the same unit, the spatial distribution of flat sedimentary microfacies and single sand body is determined, and the identification of single sand body is realized. Based on the theory of sedimentology and the application of source-controlled sedimentary system analysis technology, and under the background of the research results of large area provenances, the data of dense well pattern are used to make full use of geological, well logging and laboratory test data. The strata in the study area were divided into small layers by correlation and then a uniform and fine stratigraphic framework was established and 19 sedimentary units were finally divided. The classification principle of sedimentary microfacies is put forward, including microfacies of distributary channel, overflow sand, sheet sand, abandoned channel and so on, and 19 planar sedimentary microfacies diagrams are drawn. At the same time, the phase diagram is described in detail. The source, type and distribution of sedimentary system in the study area are determined in detail. Based on the sedimentary model of fluvial delta system and the quantitative description of sandstone thickness, effective thickness, drilling rate, sand to soil ratio, and based on the study of planar sedimentary facies, a continuous flake channel sand deposition model is proposed. There are five models, such as broad-band channel sand deposition model, branched channel sand deposition model, intermittent scattered channel sand deposition model and sporadic block channel sand deposition model. This provides a more accurate geological basis for reservoir characteristics analysis, reservoir comprehensive evaluation, development dynamic analysis, fluid distribution, prediction of favorable blocks and tapping potential of remaining oil.
【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】：TE324;P618.13

【参考文献】