INFLUENCE OF DETERMINING FACTORS ON THE CONDITIONS OF FLOWING OF WATERED GAS WELLS

Abstract

The peculiarities of the water pressure regime of gas field development are revealed. The methods of exploitation of watered gas wells are presented. The fountain method of exploitation of watered gas wells is characterized. The determining factors affecting the conditions of fountainization and the productive characteristics of wells are highlighted. A generalized analytical dependence of the minimum required gas flow rate for water removal from the well on the water factor, bottomhole and wellhead pressures, and tubing diameter is proposed. A methodology for selecting the parameters of stable waterflooding of watered wells has been developed. The influence of the following determining factors on the process of watered wells' flowing was studied: water factor, bottomhole and wellhead pressure, and tubing diameter. The dependencies of the minimum required gas flow rate for water removal from the well on the water factor for different values of bottomhole pressure, the dependence of reservoir gas flow rate and the minimum required gas flow rate on bottomhole pressure, the dependence of pressure at the wellhead of a watered gas well on the water factor for different values of the internal diameter of tubing were constructed. The results show that by gradually reducing the wellhead pressure, it is possible to extend the flowing period of watered gas wells. The boundaries of the waterflooded wells' flowing area are determined by the value of the water factor depending on the pressure on the buffer and the tubing diameter. The geological and technical measures to extend the wells' flowing period are proposed, including the choice of tubing diameter, regulation of wellhead pressure values, and bottomhole treatment of gas-bearing formations.