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本文首先介绍了剩余油的发展情况,研究剩余油的目的、内容及必要性。并且以葡北三断块为例对其石油地质储量进行核算,其结果与上次的有一定的差别,主要是原来的含油面积是针对整个断块而言的,在本次计算中采用分单元圈定含油面积。之后应用综合分析方法研究剩余油分布规律,主要包括不同沉积微相剩余油分布规律;不同类型低效无效循环体分布特征及对剩余油分布的影响;不同井网条件下剩余油分布规律;四类井分布状况及对剩余油分布的影响。根据砂体类型、韵律类型、不同沉积微相及所处位置,选择解剖井区,进行剩余油分类研究。最后在剩余油分类研究的基础上,针对每种类型的剩余油分别提出挖潜方法,提高井网的利用率,改善储层的动用状况。
This paper first introduces the development of remaining oil, the purpose of studying the remaining oil content and necessity. Taking the Pubei 3 fault block as an example, the petroleum geological reserves are calculated. The result is different from the previous one. The main reason is that the original oil-bearing area is for the entire fault block. In this calculation, the sub-unit Determine oil area. Followed by a comprehensive analysis of the remaining oil distribution law, including the distribution of residual oil in different sedimentary microfacies; distribution characteristics of different types of inefficient and ineffective circulation body and the distribution of remaining oil; distribution of remaining oil under different well patterns; Well distribution and its influence on remaining oil distribution. According to the type of sand body, the type of rhythm, the different sedimentary microfacies and their locations, the anatomical well area was selected to study the remaining oil classification. Finally, on the basis of researches on the remaining oil classification, the methods of tapping the potential for each type of residual oil are put forward separately to improve the utilization of the well pattern and improve the utilization of the reservoir.