Abstract
A method for estimating the condition of the bottomhole zone of a gas well formation based on the results of interpretation of gas-dynamic well tests on the steady-state filtration conditions (on the example of horizon IV of the Bohorodchany UGS) is proposed. When planning activities to intensify hydrocarbon production, it is important to know the current and maximum capabilities of the formation at the point of its opening by the well. The indicators that characterize the relationship between current and potential opportunities include: skin effect, performance ratio, well perfection rate and the like. The values of these parameters are determined by the results of processing the pressure recovery curvesFor UGS wells, gas-dynamic studies on unsteady filtration regime with registration of bottomhole pressure change over time are not performed, so there are difficulties in determining the estimated parameters of the bottomhole zone and the effectiveness of geological and technical measures for each well.A method for determining the maximum productivity of gas wells on the example of horizon IV of the Bohorodchany UGS using the coefficient C, taking into account the productivity in the Rawlins equation, is proposed.According to the results of the comparative analysis of productivity coefficients with the specific volume of the formation, it is established that there is a fairly good correlation between these parameters. This confirmed the assumption that the productivity factor reflects the filtration characteristics of the formation.The condition of the bottomhole formation zone is estimated by the coefficient of productivity ratios (current to maximum). The decrease in the current productivity ratio below the maximum is due to a decrease in the permeability of the formation in the bottomhole area in the absence of a blockage at the bottom or a column of liquid.The results of this work allow us to identify facilities where it is advisable to apply methods of intensification of hydrocarbon production and evaluate the effectiveness of work without stopping wells to register the bottomhole pressure recovery curve. Key words: well, gas-dynamic well test, productivity ratio
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