沈84块油藏剩余油饱和度及其分布富集研究

Study on Residual oil Saturation and Its Distribution in Block Shen 84 Reservoir

宋子齐，谭成仟，李能根，等．沈８４块油藏剩余油饱和度及其分布富集研究．测井技术，１９９８，２２（６）：４２０～４２６通过沈８４块油藏开发后期水淹层分析，研究用过滤电位校正自然电位，计算地层混合液电阻率；结合水样分析资料进行了估算，分阶段和井位加以选用。进而，分别采用神经网络模型和淡化系数方程确定相应的剩余油饱和度。通过沈８４块Ｓ４３Ⅱ油组油藏实际应用，提取、集总和分析了Ｓ４３Ⅱ油组各小层油藏及剩余油参数，结合各小层沉积微相时空分布规律、剩余油分布范围及储量研究，按Ⅱ８、Ⅱ７、Ⅱ５、Ⅱ６、Ⅱ３、Ⅱ４、Ⅱ１、Ⅱ２小层顺序，分析和阐明了大小不同的豆荚状、豆粒状和条带状剩余油分布富集形状。

By analysing the flooded formation entering the later period of development in block Shen 84, studied are the method of correcting the spontaneous potential using electrofiltration potential in order to accurately determine the resistivity of mixed formation water. Combining the formation water analysis data, the resistivity of mixed formation water is estimated and is used according to different stages and different well locations. Then, by using neural network model and freshening factor equation, the ROS is determined. During the practical application in S 4 3 Ⅱ formation of block Shen 84, the parameters about oil reservoir and the residual oil in every member are extracted, assembled and analysed. In the order of members, i.e., Ⅱ 8, Ⅱ 7, Ⅱ 5, Ⅱ 6, Ⅱ 3, Ⅱ 4, Ⅱ 1, Ⅱ 2, the shape of the residual oil accumulation area in every member is analysed and clarified with the help of research on the time space distribution of sedimentary microfacies, the distribution of residual oil and the oil reserves. They have different sizes and take the shape of beanpod, pisolite and band. The above research provides reliable basis for the synthetic adjustment and development in this block.