The analysis of the development indicators of the Tournaisian deposit

The purpose of the present investigation is to analyze the development indicators of the Tournaisian reservoir of the Ural-Volga oil field. To complete this task, a large array of data is required, which has been obtained from the Technological Development Project. Numerical calculation is performed using software code implemented in the Python programming language with the material balance method. To minimize the material balance error in the software code, the optimize.minimize function of the SciPy library has been applied with the help of the L-BFGS-B method. The analysis of current development indicators has shown uneven development of the reserves of the Tournaisian oil deposit, as well as a positive effect of injection on the process of fluid displacement from the formation. In this paper, a material balance model has been constructed and adapted to the forecast date. As a result, the average error in the adapted parameters is 3,7%. To make a forecast for the development of the Tournaisian oil deposit, a dependence of the water cut of well production on the oil recovery factor based on core material has been constructed. The graphs of the arithmetic mean and maximum values of the absolute deviation module of the calculated water cut from the actual one, obtained due to a retrospective forecast of the synthesized from the Technological Development Project data of hydrocarbon fields at different stages of development are shown. It has been found that water cut of 98% achieved at a oil recovery factor equals to 0,335. The dependence of the reservoir flooding dynamics on the oil recovery factor has made it possible to forecast the technological development indicators, including the calculation of the dynamics of annual and cumulative oil production, as well as reservoir pressure. As a result of the calculation, the accumulated oil production has amounted to 649 thousand cubic meters with a water cut of 98%.