南七区聚驱不同井组注入参数优化研究

发布时间：2018-12-23 09:22

【摘要】：大庆萨尔图油田南七~杏一区东部位于大庆长垣萨尔图油田南部开发面积为16.26km2。区块内两条大断层为典型的地堑构造,断层将区域切割成三部分。地层水属NaHCO3型。大庆萨尔图油田南七~杏一区东部萨尔图、葡萄花、高台子油层为统一压力系统。油藏类型为背斜构造油藏,边水、底水均不活跃。在大庆萨尔图油田南七区东部的沉积、构造及油藏物性特征的分布中,参数都是以独立的方式表达出来的,很难形成一个完整的地下构造、储层物性的空间概念。根据该区块的特征,选择合适的建模方法,建立研究区精细三维地质模型。地质模型还需用到地直接是数据、测井、钻井分层数据及其它一些统计数据。结合各层面的构造图,多方面、全方位的综合考虑各因素,建立南七区东部构造模型。结合区块特点,建立南七区东部孔隙度、渗透率、含油饱和度的属性模型。最终得出南七区东部拟合的原油地质储量。结合所建立的地质模型进行数值模拟研究,通过模拟器的选择与数值准备、相渗曲线归一化处理及储量拟合建立数值模型;并通过油藏整体指标拟合和单井指标拟合进行历史拟合结果分析;最后对该区油层动用状况及剩余油潜力进行分析。结合以上工作对该区块进行聚合物驱不同井组注入参数优化研究,分别从单一河道(薄)、单一河道(厚)、双河道及多河道进行注入聚合物分子量、聚合物浓度、段塞以及注入速度的优化,最终为区块提高采收率找到最优方案。
[Abstract]:The eastern part of No.7 ~ Xingyi area of Daqing Saltu Oilfield is located in the south of Daqing Changyuan Saltu Oilfield with a development area of 16.26km2. Two large faults in the block are typical graben structures, which are divided into three parts. Formation water belongs to NaHCO3 type. The eastern Saartu, Gaohua and Gaotaizi oil reservoirs in the No.7 ~ Xingyi area of Daqing Saltu Oilfield are unified pressure system. Reservoir type is anticline structure reservoir, edge water and bottom water are not active. In the distribution of sedimentary, structural and reservoir physical characteristics in the eastern part of South 7 area of Saltu Oilfield, Daqing, the parameters are expressed in an independent manner, and it is difficult to form a complete underground structure and spatial concept of reservoir physical properties. According to the characteristics of the block, the appropriate modeling method is selected, and the fine three-dimensional geological model of the study area is established. Geological models also need to be used directly from data, logging, drilling stratification data, and other statistical data. Combined with the structural map of each level, the structural model of the eastern part of Nanqi region was established by comprehensive consideration of various factors in many aspects. Based on the characteristics of the block, an attribute model of porosity, permeability and oil saturation in the eastern part of Nanqi area is established. Finally, the oil geological reserves of the eastern part of South 7 area are obtained. Combined with the established geological model, the numerical model is established through the selection of simulator and numerical preparation, normalization of phase permeability curve and reserve fitting. The result of historical fitting is analyzed by integral index fitting and single well index fitting. Finally, the production status and residual oil potential of reservoir in this area are analyzed. In combination with the above work, the injection parameters of different well groups in polymer flooding in this block are optimized. The polymer molecular weight and polymer concentration are injected from single channel (thin), single channel (thick), double channel and multi-channel respectively. The optimization of slug and injection rate finally finds the optimal scheme for block oil recovery.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.46

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