靖安油田大路沟二区流动单元划分及合理性验证

Flow units division and feasibility for the sencond area of Dalugou oil reservoir, Jing'an oilfield

为了提高油藏开发效果,根据大路沟二区油藏的渗流特征,采用岩性物性方法划分了流动单元,并且用判别分析法、微观渗流实验法、生产动态法、井间示踪剂法、数值模拟法进行了合理性验证。研究区共分为A,B,C和D共4类流动单元,不同流动单元分布的相位不同,具有不同物性和微观渗流特征。综合验证结果表明,研究区的产能特征、储层吸水状况及见水见效特征和剩余油分布规律,与各流动单元的物性特征对应较好,表明所划分的流动单元是合理的。B类和C类流动单元及几类流动单元结合的区域为剩余油富集区,应作为调整挖潜的重点;可以根据流动单元的水驱优先顺序组合,决定注水调配原则。

In this paper, we provide a reasonable means for the flow units division and feasibility verification in the sencond area of Dalugou oil reservoir. According to the reservoir flow characteristics, we use the lithology property and physical property method to divide the flow unit, and use discrimination analysis, micro-flow experiment, the production dynamic method, interwell tracer method, and numerical simulation to give a reasonable validation. The results show that:①The area is divided into four flow units, the distribution of the phases of different flow units is different and they have different physical properties and micro-flow characteristics;②Integrated with a variety of identification methods of verification, the average correct rate of this division of flow units in this area is 91.4%, and it is feasible;③B, C-type flow unit, and the combination of several types of flow units is the concentrated area for the remaining oil in the region, and they should be the focus of the potential adjustment; @The priority direction, which water flow unit combination drives, decides the principle of water injection allocation.