he paper analyzes the implemented system for the oil deposits of the Tournaisian tier of the Znamenskoye field development, as well as factors reducing its effectiveness, assessment of the features of the geological structure affecting oil production, and the development of proposals to improve the development system efficiency. It is noted that during the development of the field, the geological structure of the Tournaisian tier oil deposits has significantly changed because of the additional study of the development facility, the high efficiency of the use of horizontal wells has been confirmed. It shows an increase in the initial well flow rate and the specific accumulated oil production per meter of oil-saturated reservoir thickness, a decrease in the initial water content of well production, the growth rate of water content, a decrease in the accumulated oil-water factor for the first year of well operation, depending on the increase in the capacity of the bridge between the oil and water-saturated layers. Keywords: oil reserves production; bridge; oil recovery factor; oil-water factor; well.
The article considers and solves the problem of finding the optimal strategy for the development of terrigenous deposits of the Bobrikovsko-Radaev horizon of one of the deposits of the Ural-Volga region. Based on the analysis of the behavior of the curves obtained during geophysical surveys in more than three thousand wells, four main types of facies zones were identified, characterized by different porosity and permeability properties and formed development systems. As part of the analysis of the reservoir pressure maintenance system, a direct influence of reservoir properties on the efficiency of waterflooding was established, which made it possible to develop an optimization strategy and the formation of new injection sites. Using the method of multiple regression analysis, two statistical models have been obtained – the reservoir properties model and the facies model, which make it possible to quickly assess the recovery factor and select the optimal development system for fields with a lesser degree of knowledge. Keywords: oil field development; geological structure; facies model; hydraulic fracturing; horizontal wells; hydrodynamic model; multiple regression analysis.
The article describes a new integrated approach to the analysis and design of carbonate reservoirs of the Kashira-Podolsk deposits development of an oil field confined to the Birskaya saddle. This approach made it possible to obtain results allowing making sound management decisions, as well as optimizing design decisions in the conditions of active involvement of the facility in the development and increasing the oil recovery factor from 0.247 to 0.288 units reserves by the AB1 category. In the future, it is planned to replicate the successful experiences in other fields with a similar geological structure in the north of Bashkortostan. Keywords: oil fields development; carbonates; Kashir-Podolsk deposits; reserves depletion; acid fracturing; horizontal well.
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