Integrated approach to modeling of the process of high-viscous oil extracting from carbonate reservoirs with zone of thermally enhanced oil recovery from Per-mian-Carbonaceous deposits of Usinsk field taken as an example
High viscous oil of Usinsk oilfield located in Timan-Pechora oil and gas bearing province, is extracted from fractured-cavernous carbonate reservoirs of Permian-Carbona-ceous deposit, which has already been developed for more than 30 years mainly by means of natural water drive or by means of hot water and steam injection at some separate areas. Presence of naturally fractured reservoir essentially influences a deposit development in the whole and appears one of the most important factors that affect effectiveness of steam injection accomplished in existing and new sites. This paper presents integrated approach to description and simulation of some fracture system, which includes a detailed analysis of available core samples, the results of FMI research, three-dimensional seismic data, collected field data and well testing results, integrated by means of advanced modeling techniques. The results obtained allowed to create some model of fractures of the site of steam-thermal exposure (area STE), taking into account several sets of fractures. The obtained results of numerical calculations proved significant improvement of adaptation process due to application of the developed model of fractures as well as allowed revealing influence of cracks on effectiveness of the processes of natural flooding and steam injection in a zone of STE.