剩余油饱和度测井方法在现场的应用分析

Application Analysis of Remaining Oil Saturation Logging Method in the Oilfields

为了掌握过套管电阻率测井、PNN(脉冲中子-中子)测井、中子寿命测井、碳氧比(C/O)测井方法在J油区和Q油区剩余油饱和度评价方面的优势与适应性,采用测井实例对比分析方法进行系统研究。研究结果表明,过套管电阻率测井适用未知地层水矿化度地区,可与裸眼井电阻率直接对比;PNN测井相对于中子寿命测井扩展了应用范围,在高矿化度地层、薄层对油水响应有明显优势;C/O测井适用于低矿化度地层,高矿化度地层适用性较差;中子寿命测井适用于高矿化度、高孔隙度地层,测井服务综合成本较低。J油区和Q油区多种剩余油饱和度测井方法现场应用分析和系统对比研究,为其他地区优选剩余油饱和度测井方法提供了借鉴。

In order to master the advantages and adaptability of the casing resistivity logging,PNN logging,neutron lifetime logging and carbon oxygen ratio logging methods for remaining oil saturation evaluation in J and Q Oil Regions,the methods of logging case contrast analysis is used for systematical research.The results show that the casing resistivity logging can be applied to the unknown formation water salinity areas and it can be directly compared with open hole resistivity.Compared with neutron lifetime logging,PNN logging extends the range of applications and it has obvious oil and water response advantages in the high salinity formations and thin layers.Carbon oxygen ratio logging is suitable for low salinity formations,in high salinity formations its adaptability was poorer.Neutron lifetime logging is applicable to high salinity and high porosity formations with low comprehensive costs in logging.The application analysis and the contrast of remaining oil saturation logging method in J and Q Oil Regions provides a reference for optimizing the remaining oil saturation logging methods in the other oilfields.