Abstract: Compared the production of Fuyu oil layer in the Toutai oil field, it is found that there are significant differences between the two adjacent blocks in the Toutai oil field: Mao 10 and Mao 11. To solve this problem, the development degree and heterogeneity of sandstone (thickness of sandstone and effective thickness, physical property, reservoir) and water flooding of two blocks are studied. To a certain extent, according to the results of the study can solve the problem of the development of the two blocks.