Core Experimental Study and Interpretation of the Low Resistivity Hydrocarbon Zones in Jilin Oilfield

This paper presents the characteristics of the low resistivity hydrocarbon zones and the core experimental study results in Jiling oilfield. Additional conductivity of clay and well-developed secondary pores are believed to be the main causes of the low resistivity hydrocarbon zones. Reservoirs with well-developed secondary pores display low resistivity features when they contain hydrocarbon. The occurrence of clay minerals further lowers the resistivity of hydrocarbon zones. The Waxman-Smits model for muddy sandstone is applicable to clay-bearing low resistivity hydrocarbon zones.