Abstract: The array induction logging technique provides better solutions than the traditional induction tools for those problems, such as bad vertical definition, instable radical depth of investigation and sophisticated invaded profile. In this paper, the author primarily introduces its application to the offshore exploration in Liaohe oilfield.We can eliminate the bad effect of low resistivity value derived from the mud of high salinity and deep filtrate invasion. The author also summarizes and analyzes its importance on the evaluation of hydrocarbon reservoirs after studied the features, values and radial relations of the Array Induction curves. In addition, the author finds an analysis model of reservoir evaluation by using Array Induction data and pointes out the unique status of conventional log.