Sedimentary Fades of J_1 S_2 Reservoir in Well Block Z1 of Junggar Basin

From the aspects of core facies, logging facies ,seismic facies, etc, sedimentary facies distribution of J1s2 reservoir in well block Z1 of Junggar Basin is discussed in depth. It is considered that J1s22 is distributary channel microfacies deposit of multiphase superimposed in braided river delta front, the lower section of J1s12 is a sedimentary microfacies of sheet sand in meandering river delta front , the upper section is a microfacies deposit of underwater distributary channel in meandering delta front . Well Z1 is located in the microfacies depositional area of the distributary channel in delta front, which is beneficial for forming lithologic reservoirs.