Abstract:

Regional tectonic framework of Qingtong Depression consists of fault-depression and fault-uplift. The faultzones trend mainly NEE and EW. Fourteen secondary structural units are divided as sample points in the depression.Fuzzy mathematical method is used to get the values of qualitative geological conditions of the depression, then the sample point data could be converted into zonal score Values by weigthed mean method, and finally use R-factor analysismethod to assess regional oil-gas reservoirs. In order to estiment those samples with poor parameter relativity, fuzzy comprehensive assessment is made for the main components derived from the factor analysis. The concept of blank-valueand calibrated-value was introduced to stack vertically multi-sequence assessment results.

Key words: R-factor analysis, oil-gas zone, assessment, fuzzy comprehensive assessment, blank-value, calibrated-value