A recent research shows that the internal structures developed during a sedimentary process vary regularly with the direction of deposition. The complexity of the internal structures can be described by using pseudo-entropy from seismic reflection data. By analyzing spatial variation in the pseudo-entropy of seismic data, the sedimentary facies types can be estimated and the pro- spective zones of sandstone can be predicted. This new method for sedimentary facies analysis has shown particular promise in the Erlian basin in North China. A recent research shows that the internal structures developed during a sedimentary process rather regularly with the direction of deposition. The complexity of the internal structures can be described by using pseudo-entropy from seismic reflection data. By analyzing spatial variation in the pseudo-entropy of This new method for sedimentary facies analysis has shown promise promise in the Erlian basin in North China.