Abstract: The lacustrine subaqueous fan lithologic reservoirs are the main new type of the reserve volume growth in rift basis in Middle and East China,the distribution is controlled by the extention of lacustrine subaqueous fans.The typical characteristics of the lacustrine subaqueous fan lithologic reservoirs are narrow extention,quick horizontal change and strong inhomogeneity.Murige lacustrine subaqueous fan lithologic reservoir in Erlian Basin in China is taken as example to discuss the reservoir evaluation thought,method and main content from the estimated reserves to proven reserves,present some measures in view of verifying the reserve volume accurately and reasonably,and decrease the risk of evaluation exploration.The study shows that the key of lacustrine subaqueous fan lithologic reservoir evaluation is the change of the reservoir characteristics,dynamical evaluation of the main characteristics of lacustrine subaqueous fan lithological reservoir must be done,such as net pay thickness,porosity and saturation etc.,on the basis of dynamic reservoir prediction.By the abovelmentioned reservoir evaluation thought and method,good application effectiveness in the Murige lacustrine subaqueous fan lithological reservoir in Erlian Basin is acquired.

Key words: reservoir evaluation, subaqueous fan, lithologic reservoir, dynamical evaluation, reservoir prediction, Erlian Basin