Characteristics of Low Resistivity Oil Reservoir in Yanchang Formation Shanbei Triassic System and Its Origin.
There are two kinds of oil reservoir, which have different characteristics in Yanchang Formation Shanbei Triassic. They are the normal high resistivity oilreservoir and abnormal low resistivity oilreservoir. According to the conduction mechanism of rock and its influence factors, the origin of the low resistivity oil reservoir is analyzed. It is suggested that the formation of the low resistivity oilreservoir results from lithology, physical property, water property, oilbearing property and trap type, etc.