Major oilfields in central-eastern China have entered into the high water-cut development stage during which about 40%-60% reserves need to be recovered.Fine description of reservoir is the most essential work for effective oilfield development; at the same time the fine description of high water-cut reservoir is of special significance for boosting production practice in oilfields and deepening understanding of production performance.Based on the detailed study on related documents both in Chinese and in foreign languages

in combination with practical experiences in typical oilfield production

we systematically introduced the status quo of the research on fine description of reservoir in high water-cut oilfield

and summarized the five main problems existing in the present research

including fine division and correlation of stratigraphy

reservoir heterogeneity

patterns of reservoir variation in the process of oilfield development

comprehensive remaining oil characterization with integration of various data

and tertiary oil recovery in high water-cut oilfields.Subsequently

several new techniques and methods with better application results now were pointed out.In addition

the focuses of present research were summarized as follows: ① fine interpretation of fracture system; ② fine characterization of reservoir architecture; ③ logging interpretation for water-flooded layers; ④ identification of preferential seepage channels; ⑤ multipoint geostatistical modeling.