Tight sandstone oil is distributed in Gaotaizi and Fuyu oil reservoirs in the central depression in northern Songliao Basin, with accumulative resources more than 10×108t. Based on exploration practices, the tight reservoirs are characterized by heterogeneity(vertically unconcentrated, laterally discontinuous, small single sand body, and variable physical properties), so they can not be developed effectively by using conventional techniques. As for heterogeneous characteristics of tight reservoirs in Daqing...