用测井资料研究沈84块水淹层剩余油饱和度

利用测井资料和神经网络方法技术，研究沈８４块高含水开发后期水淹层剩余油饱和度。采用过滤电位校正后的自然电位及水样分析资料计算地层混合液电阻率，并与相应地层孔隙度、泥质含量、深探测电阻率组合，研究出参数分析方法和解释模型．经区块开发后期２０多口井主要目的层段水淹层计算和评价处理，反映出该区块东部主河道砂体为主要含油砂体，储层厚度大，物性好，含油饱和度高，油层单位面积储量及单井控制储量比较大，致使这部分断块沙三下主要油层组已进入强水淹或趋强水淹状态．文中列举了相应井段水淹层剩余油饱和度的纵向分布，为该区块沙三下综合治理和开发提供了可靠依据．

The Study of Remaining Oil Saturation of the Watered out Layers in Shen 84 Block by Using Log Data

A method is introduced for the calculation of the remaining oil saturation of watered out layers in high water cut development stage by log data and nerve network technique.The remaining oil saturation of main objective formations of above 20 wells in shen 84 block is calculated by this method.The calculation results show that the main oil bearing sandbodies in the east of the block have bigger thickness,higher porosity,permeability and oil saturation,greater specific areal reserve and single well control reserve,but they have been or are being in strong watered out state.The relative error of the remaining oil saturation calculated by this method to that from core analysis is only 4.86%.The longitudinal distributions of watered out layers and remaining oil saturation given in the paper will provide a reliable basis for the further development of the block.