Abstract：Nadu Formation of central sag zone in eastern depression of Baise basin is continental clastic sedimentary formation, the character of reservoir is tight lithology, complex porous structure and strong non-homogeneity as well as poorer lateral correlation, which made using the traditional method of interpretation to correctly evaluate the reservoir be very difficult. Integrative application of core analysis with electric feature of reservoir to carry out systematic study of reservoir in the region, a set of techniques synthetically evaluating tight clastic reservoir by using ordinary logging data is preliminary formed, including distinguishing fluid nature, evaluating porous structure, evaluating non-homogeneity of reservoir, classification of reservoir and prediction of production, the effect of evaluation is carried out by cases, which is showed that the application of the technique can effectively promote the exploration and development of the central sag zone.
