Abstract: Provided that sedimentary facies modeling based on two-point geostatistics is unable to present complex space relationship of multiple microfacies, in this paper multiple-points geostatistics is introduced to the 3D braided river sedimentary facies model of Block SU49-01 of Sulige gas field. The geologic element and space contact relationships of different microfacies of braided river is established through comprehensive analysis of all kinds of materials including seismic attributes, outcrop observation, geological understanding of similar sedimentary environment in dense well net block and related literature material, and then the 3D braided channel microfacies training image of 8th lower member of Shihezi Formation is made.With the hard data of well point microfacies interpretation and soft data of P-sonic impedance, three-dimensional microfacies model is created with the method of multiple-point geostatistics constrained with seismic data. Integrating geological model and seismic data, the sedimentary facies model built with multiple-point geostatistics reflects the sedimentary microfacies space distribution in braided river more accurately, which provides a new measurement to predict the distribution of effective sand-body and has a guiding significance for gas development at Sulige gas field

Key words: Sulige gas field, multiple-point geostatistics, sedimentary microfacies modeling, braided river