Abstract
The Upper Devonian carbonate reservoir characterization of the Pamyatno-Sasovskoe Oilfield, Volgograd Region, Russia, is based on geological data, geophysical log, hydrodynamic and tracer investigations. The reservoir model based on geostatistical techniques with grid blocks has been used to update a flow simulation to available data on production history. The reliability of this reservoir model is lower because of the match to available data is unacceptable. The method to model permeability on the coarse scale presents the combination of the borehole radon indication and tracer investigation. According to tracing results, a streamline-based model is to be most realistic, gives a basis to propose the parameters and properties of streamlines and to predict the water-cut process.