1. College of Geo-exploration Science and Technology��Jilin University��Changchun 130026��China; 2�� Communications Design ��esearch Institute Co�� ��Ltd of Jiangxi Province��Nanchang 330002��China; 3�� Daqing Oilfield Drilling Engineering Well Logging Company��Daqing 163412��Heilongjiang��China

Aiming at the logging characteristics of basalt in complex lithology of igneous rocks in the eastern depression of Liaohe Oilfield��the authors found four different types of basalt strata according to the logging data of the eastern depression and identification of the slides of the coring section �� The basalts have been divided into two groups to contrast�� The first group: stomatal basalt and breccia basalt; the second group: basalt and oil-water bear- ing basalt�� Using basalt stratigraphic data to make logging responsive statistics��and compare the difference of the various kinds of logging parameters and make cross plot��it is concluded that the breccia basalt has higher SP value contrast with stomatal basalt��and oil-water bearing basalt has higher G�� and CNL values contrast with basalt�� The reasons are that the fractures developed well in stomatal basalt and breccia basalt with low density��and the clay minerals filled into the fractures in breccia basalt leading to high SP value; and the H element in oil-water bearing basalt leading to high G�� and CNL values��