Based on the casting slice,cathode luminescence and SEM analyses,the petrological characteristics and feldspar distribution characteristics of the 8th member sandstone reservoir of Shihezi formation(hereinafter calledHe8memberfor short)were precisely characterized on a basin scale.Results in combination with acidolysis simulating experiment,burial history,thermal history and diagenesis characteristics were used to discuss the genesis of feldspar anomaly distribution.The results show that the absence of feld...