In the work, the technique of expeditious modeling of deposits of oil with use of facies and facial heterogeneity is described during creation of geological and hydrodynamic model. Expeditious diagnosing of facial deposits is based on a mathematical method of a clustering by an algorithm k-means. In the work merits and demerits of this method and a way of his calculation for differentiation and the subsequent grouping of wells with various data are specified. An object of a research is terrigenous layer of the large-scale deposit of Western Siberia of Lower Cretaceous age. In the facial relation layer was created in a transitional situation of sedimentation and includes deposits of both sea, and transitional genesis. The research was conducted on 900 wells of layer collector, according to geophysical researches curves PS, αps, with control under the curve of GR log. By results of the cluster analysis several groups, excellent in the form of curve geophysical surveyshave been allocated. Comparison of the allocated groups given logging received as a result of a clustering with standard forms of curves according to V.S. Myromtsev facial deposits of the beach, a gully of explosive currents, alongshore gullies, the top part of a prefrontal zone of the beach, transgressive shaft of a prefrontal zone, the lower part of a prefrontal zone of the beach, underwater shaft of a prefrontal zone of the beach, alongshore bars have been allocated. The obtained data have been correlated to their vulgar distribution and the received distribution doesn't contradict features of sedimentation of this region. Expeditious diagnosing of facial deposits by means of the cluster analysis allows to estimate more competently the provision of a collector of geological model and to predict petrophysical properties and features of layer, to exclude subjective mistakes of the expert and to lower assessment time during the work with a large number of data.