Study on sedimentary facies of braided stream and its application in geological modeling in Sulige gas field

On the basis of classification and correlation of single sandstone horizon according to bore cores,logging and seis- mic data,analysis on target horizons——the eighth member of Shihezi Formation to the first member of Shanxi Forma- tion member in Sulige gas field suggests that the region stud- ied is of the is mainly the sedimentary system of braided stream under the background of marsh.It is presented that the braided stream can be divided into channel subfacie and off-coast subfacies,of which the stream chanel subfacies can be subdivided into the microfacies of diara,stream chan- nel sluicing and discarded stream channel,and the off-coast subfacies can be subdivided into the microfacies of bank sedi- mentation,and bank-spilled trough sandstone.The rela- tionship between the sedimentary subfacies and effective res- ervoir is performed thereby,and the research production is successfully applied into the geological modeling of reser- voir.