川东北海相碳酸盐岩饱和度参数m、n确定方法  

Determination Method for m and n Parameters of Marine Carbonate Saturation in Northeast Sichuan

作　　者：徐炳高[1] 李阳兵[1] 董震[1] 

机构地区：[1]中国石化集团西南石油局测井公司,四川成都610100

出　　处：《测井技术》2011年第1期51-54,共4页Well Logging Technology

摘　　要：川东北海相碳酸盐岩储层物性变化大,孔隙结构复杂,导致饱和度模型参数m、n值变化大,为饱和度计算参数合理选取带来难度。利用实验结果计算了m、n值,并对其影响因素进行了分析,认为m、n值与储层类型、储层物性等因素有关;随着储层孔隙度增高,m、n值逐渐增加,而裂缝的存在使m值明显降低、n值增大;根据m、n值变化对含水饱和度计算影响程度分析,认为m值变化对含水饱和度计算影响程度较大,而n值影响较小,确定了裂缝型储层、不同物性孔隙型储层的m、n取值方法。Large variations of reservoir physical properties and complex pore structures lead to the variations of rn and n parameters of marine carbonate saturation model in Northeast Sichuan, so, it is difficult to select the parameters of calculating saturation. On the basis of core electricity experiments, calculated are cement index rn and saturation index n parameters of the saturation model. And investigated are the effect factors on electrical parameters. The result shows that the values of electrical parameters are related to the reservoir types and the physical properties of the reservoir. The values rn and n increase with the pore increasing. The m decreases and n increases in fracture formations. Researched is the effects of the variations of the rn and n on calculating saturation. The results reveal that the impact degree of the variations of the m and n on calculat ing saturation is different, providing the obtaining value methods of the m and n in fractured reservoir and porosity reservoir in different pore intervals.

关 键 词：测井解释 胶结指数 饱和度指数 海相碳酸盐岩 川东北 

分 类 号：P631.84[天文地球—地质矿产勘探]