Quantitative study on Triassic Diagenetic Facies in the Kebai Region,Northwest Junggar Basin

The Triassic system of northwestern Jungger Basin is one of the most important producing formation in western China.Intense tectonic movements,complicated tectonic structure styles,fans,braided fluvial deposits,and braided deltas have complicated and diversified the development stages and superposition styles and it's very difficult to forecast the distribution of high grade reservoirs.Based on the analysis of the diagenetic types and features,this paper considers that compaction,cementation and denudation are the dominant diagenesis in the study area.By calculating compaction percentage,cementation percentage and denudation percentage,we classify diagenetic facies.Also the features of distribution are researched and used to guide the exploration by telling the favorable diagenetic facies distribution.