Study On Influence Factors Of Separation Efficiency Of Gas Well

In order to significantly reduce water lifting, handling costs, extend the economic life ofhigh water cut wells, this paper presents application of downhole gas-water separationtechnology can be output of water directly into the same well water recharge in gas wellproduction. This technology has good economic and environmental effects. In this paper, putforward the use of Gas-Liquid Cylindrical Cyclone for underground gas and water separationby the first time,and comprehensively research the underground gas-water separationtechnology to injection by means of theoretical analysis and numerical simulation.First of all, theoretical analysis working principle and separation principle of differentunderground gas-liquid separators, then summarized proposed a variety of advantages anddisadvantages of gas-liquid separator; the paper bring forward that using Gas-LiquidCylindrical Cyclone separator for downhole gas-water separation is reasonable combinationof conventional gas-well processes. Second, the paper analysis of the Reynolds Stress Model(RSM) as the most suitable turbulence model for the numerical simulation of the Gas-LiquidCylindrical Cyclone separator separation performance; establish Gas-Liquid CylindricalCyclone fluid flow mathematical model, the geometric model and physical model first.Formany model parameters, respectively, it uses FLUENT software to simulate gas-liquid oftwo-phase flow field, and detailed study the relationship: the changes of structural parametersof GLCC separator and the turbulent gas flows as well as the impact of separation efficiencyfactors. Results are obtained that the diameter of the gas (liquid) outlet pipe, the inlet speedspiral has relationship with separator pressure drop, cross-section pressure drop, velocity'sdistribution and separation efficiency. Finally, the paper make the diameter of GLCC separator,inlet angle, the hight of the entrance, the inlet speed as well as liquid flow and gas flow as thebasic structure parameters impacting the performance and efficiency of separation. Accordingto gas-liquid two-phase analysis of simulation results, while overall energy consumption efficiency and separation factors, the paper obtains the best structure of the Gas-LiquidCylindrical Cyclone separator.