Application of Multipoint Geostatistics in Facies Modeling of Braided River Delta

摘要

In view of the difficulties of cross-well prediction of ST gas field in polar region such as the large well spacing and the inability of seismic data to directly constrain modeling,a multi-point geostatistical facies modeling method with"seismic multilevel constraint"is proposed.Firstly,the plane distribution of sedimentary facies in braided river delta is obtained by various seismic attribute prediction techniques.And combined with outcrop analysis and empirical formula,the training image of the study area can be achieved.Then,the lithologic trend body established by seismic attribute is used as the constraint.The multipoint geological statistical facies model of the study area is established.Compared with the results from sequential indication method and object-based modeling method,the well coincidence rate is higher and the pattern of facies distribution is more reasonable.