Abstract: Whether reservoir contains oil and gas is closely related to the lithology,physical properties and electrical properties of the reservoir.On the basis of the combination and con- trast analysis of bore core and logging data,the relationship between lithological and electrical properties is established. Logging data are used to establish the model for logging in- terpretation by multifold ways.In the model,effective thickness,porosity,permeability,gas saturation and other parameters are interpreted quantificationally,and therefore the gas horizon is identified qualitatively.