头台油田扶余油层非均质性研究

发布时间：2018-04-13 10:43

  本文选题：精细解剖 + 沉积微相　； 参考：《东北石油大学》2017年硕士论文

【摘要】：大庆油田已经进入高含水后期开发阶段,但仍有相当部分的剩余油赋存在地下储层中,河流—三角洲陆相沉积复杂,非均质性严重,是影响剩余油分布的主要因素,要摸清地下储层剩余油的分布规律,就需要对储层不同环境与类型进行精细解剖。应用高分辨率层序地层学与沉积学原理,按照“结合物源、分级控制、旋回对比、考虑断层”的原则,对头台油田茂10、茂11区块扶余油层进行精细的小层划分与对比,建立起392口井34个时间单元的层序地层格架。再根据不同沉积微相特征建立起三角洲、曲流河2种沉积相、3种沉积亚相、23种微相的测井相模式。其中微相中包含曲流河道微相、分流河道微相、溢岸砂微相、席状砂微相等。在此基础上精确绘制34张平面沉积微相图,并对其精细描述研究,总结出各微相砂体展布规律。在此基础上对扶余油层34个时间单元内储层进行有效砂岩厚度、孔隙度、渗透率、渗透率变异系数、级差等参数以及水淹情况的分析研究,全面了解主力油层储层的非均质性。确定头台油田扶余油层的剩余油类型有河道边部型剩余油、差油层滞留型剩余油、优势运移通道屏蔽型剩余油。建议在研究区下一步剩余油开采中:开发区加密、开发区扩边。
[Abstract]:Daqing Oilfield has entered the stage of high water cut late development, but there is still a considerable amount of remaining oil in the underground reservoir. The fluvial delta continental facies deposition is complicated and the heterogeneity is serious, which is the main factor affecting the distribution of remaining oil.In order to understand the distribution of remaining oil in underground reservoir, it is necessary to anatomize the different environments and types of reservoir.Based on the principles of high-resolution sequence stratigraphy and sedimentology, according to the principle of "combination source, grading control, cyclic correlation, and considering faults", the fine sublayer division and correlation of Fuyu oil reservoirs in Mao-10 and Mao-11 blocks of Toutou Oilfield are carried out.A sequence stratigraphic framework of 34 time units in 392 wells was established.According to the characteristics of different sedimentary microfacies, the logging facies models of delta, meandering river, two sedimentary facies and three sedimentary subfacies are established.The microfacies include meander channel microfacies, distributary channel microfacies, overflowing sand microfacies and sheet sand microfacies.On this basis, 34 planar sedimentary microfacies diagrams are accurately drawn, and their fine description is studied, and the distribution law of each microfacies sand body is summarized.On this basis, the effective sandstone thickness, porosity, permeability, coefficient of variation of permeability, coefficient of variation of permeability and water flooding are analyzed and studied in 34 time units of Fuyu reservoir, and the heterogeneity of the main reservoir is fully understood.It is determined that the remaining oil types of Fuyu reservoir in Toutai Oilfield are river side residual oil, differential reservoir residual oil and dominant migration channel shield remaining oil.It is suggested that in the next step of remaining oil production in the research area, the development zone should be encrypted and the development zone expanded.
【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
，

本文编号：1744150