新北油田馆上段储层电阻率特性及影响因素

通过对新北油田油气层、油水同层及水层围岩的电阻率特性分析,认为该区电阻率差异较大,既存在正常油气层的电阻率特征,又存在低阻油气藏的电阻率特征.研究总结有如下规律:该区油气层束缚水饱和度越高,电阻率越低;油层厚度越薄,电阻率越低;构造幅度越小,电阻率越低;地层水矿化度越大,电阻率越低;油水系统越复杂,电阻率越低;原油性质...

Study on resistivity characteristics and influencing factors of Upper Guantao reservoir in Xinbei Oilfield

By studying the resistivity characteristics of oil-gas layer,oil-water layer,water layer and the surrounding rock of Upper Guantao reservoir in Xinbei Oilfield,we considered that the resistivity in this area has great difference,which not only has the characteristics of normal reservoir,but also has the resistivity characteristics of low resistivity reservoir.Study shows that the higher the irreducible water saturation is,the lower the resistivity is;the thinner the oil layer is,the lower the resistivity is;the smaller the structure amplitude is,the lower the resistivity is;the higher the reservoir water salinity is,the lower the resistivity is;the more complex the oil-water system is,the lower the resistivity is.If the oil property is good,the oil layer resistivity after the mud invades is relatively low.Finally,from the reservoir genetic features,this paper sums up that the low resistivity reservoir is controlled by the regional structural setting,depositional environment and accumulation processes.In order to accurately identify and understand such reservoirs,we must consider all influencing factors and build the related interpretation models.