Increasing the efficiency of watered gas wells operation by the natural flow method

<ns3:p>To investigate the influence of the water factor, filtration resistance coefficients of the bottomhole formation zone, and the diameter of tubing on the wellhead pressure and duration of the natural flow period of a watered gas well and to substantiate technical and economic measures to improve the efficiency of its operation using the reservoir gas own energy.The paper employs mathematical modelling to analyse the influence of determining factors on the natural flow mode of gas wells. Calculations were performed using analytical dependencies. A series of studies was conducted to determine the optimal combinations of water factor, tubing diameter, and filtration resistance coefficients of the bottomhole formation zone for different values, ensuring efficient well operation under waterflooding conditions.Based on the results of the conducted studies, it was found that the wellhead pressure and the duration of the period of natural flowing of a watered gas well increase with an increase in the degree of reduction of the coefficients of filtration resistances of the bottomhole formation zone and decrease with an increase in the diameter of the tubing and the water factor. Based on the modelling, it was determined that the optimal value of the degree of reduction of the coefficients of filtration resistances A and B is 4.271, which provides the best balance between hydraulic pressure losses and well operation efficiency under conditions of partial watering.The studies were performed for different values of the water factor, tubing diameter, and the degree of reduction of the filtration resistance coefficients A and B. To establish the period of flowback operation of a watered gas well, additional modelling studies are required for specific fields and operating conditions.The obtained research results will enable the enhancement of the efficiency of gas well fountain operations under watering conditions.According to the results of the statistical analysis of the calculated data, the optimal value of the degree of reduction of the coefficients of filtration resistances of the bottomhole formation zone of a watered gas well was determined, which is 4.271 for all studied values of the tubing diameter.</ns3:p>