Calculation scheme for forecasting technological indicators of oil reservoir exploitation process of exploitation of an oil reservoir

In the article, at a certain stage of operation, a calculation scheme was proposed, which performs the identification of the conductivity dynamics of the rock contaminated with heavy components contained in the oil according to the actual data of the well, and based on it, a forecast assessment of the technological indicators for the next operational stage was carried out according to a specific formation model. For this, in the equation of the process of filtering oil into the well, it is ensured that the conductivity of the coefficient, which describes the increase in mechanical stress due to the deposition of heavy hydrocarbon compounds on the rock surface, is taken into account according to the empirical dependence selected according to the pressure drop. To determine the coefficient describing the mechanical stress on the rock surface, the condition of minimizing the function depending on the permeability coefficient is added to the system of equations describing oil percolation into the well (the straight problem), and using this condition, a problem is formulated that is an adjunct to the straight problem, and their solution is sought by applying the finite difference scheme. At this time, the exact value of the coefficient describing the mechanical stress falling on the rock surface, which is included in the empirical dependence of conductivity, is determined by ensuring the proximity of the dynamics of change of the actual operating data given analogously for its formation conditions with the dynamics of change of the pressure and the value of the flow calculated in the well. According to the new value of conductivity, the forecast assessment of technological indicators (well bottom and layer pressure, production change dynamics) for the next stage of operation is ensured with high accuracy. The implementation of the determination method allows for a purposeful and effective refinement of the hydrodynamic model of filtration processes in an oil reservoir in the conditions of incompleteness and inaccuracy of initial geological-mining data, and ensures realistic adjustment of the reservoir development system at any stage of development in order to improve the forecasting of technical and economic indicators of production and increase the oil yield of the reservoir.