剩余油饱和度配比系数法探询剩余油分布规律——以下二门油田中下层系为例

The saturation of remaining oil allocation method applied to predict the distribution of remaining oil in the middle and lower layers of Xiaermen Oilfield

陈景阳 闫晓芳 周红

Chen Jingyang Yan Xiaofang Zhou Hong

中国地质大学 资源学院, 湖北 武汉 430074

Resource Department, China University of Geosciences, Wuhan 430074, China

以往对剩余油饱和度的空间分布特点,多是利用测井资料定性地研究,多数没有定量化,更很少对每口井的各小层(即时间单元)的剩余油分布做出定量的预测。利用剩余油饱和度配比系数法结合下二门油田中下层系的实际生产数据寻找到-条定量预测某-时刻各井各小层剩余油分布的途径和方法。通过小层劈分,获得了每个时间单元的剩余油量和可动油饱和度,进而为在平面和纵向上研究剩余油的分布规律提供了依据,并结合油田的静态资料探讨了剩余油分布的控制因素,为今后油田的挖掘提供了方向。

In many researches on distribution rules of residual oil, we often describe qualitatively what the saturation of residual oil distributes in the whole reservoir according to the character of distribution in space. To accomplish it, we shall make use of logging data. However most of researches don't analyze it quantitatively, and there are scarcely quantitative forecast to the distribution of residual oil about every tiny layer in every well. This paper carries out it with quantitative forecast. On the basis of the productive data of Xiaermen Oilfield, it discusses something on establishment of the saturation of residual oil allocation method, such as origin, process, and condition when it was adopted. On the other hand, some conclusions on distribution of residual oil can be drawn according to the result, and it will lead the way to exploitation in the future. By calculating in every tiny layer, we can get the quality and saturation of residual oil. It gives the base of studying the distribution of oil in the plane and vertical. In addition, by combining the static data of oilfield (such as porosity and permeability), we also study the control factors of distribution of residual oil. So it is useful to the further study of oil production.