The Numerical Simulation Study Of Combined Water Drainage Gas Recovery Tools In Gas Production Processes

Gas wells in the development of different stages are faced with the phenomenon of formation water production and gas condensate forming, serious bottom hole liquid loading fluid would result in gas well waterout. Traditional eddy current tool has the characteristics of simple structure, small size, high efficiency, free pollution, which has won a wide application in the gas field production at home and abroad. Traditional eddy current tools, however, in the face of different oil and gas field downhole conditions and the wellbore production parameters, the effect of both liquid drainage is different. Therefore, in order to resolve the problem of the lack of the current field experience to eddy current tools, the lack of gas drainage technologies designed theoretical understanding of the problem, based on two-phase flow theory and related theories spray school, this paper presents a novel compound mechanical gas liquid separation device, and has accomplished the establishment of the mathematical model to predict the continuous liquid carrying distance, provide the theoretical basis for the study of new mechanical dewatering gas tool; use finite element analysis method,with Fluent simulation software for complex flow of gas-liquid separation device, explore new spray nozzle structural parameters of the gas vortex tools for drainage effect. The studies have shown that the smaller atomization nozzle diameter nozzle, the smaller the velocity of the fluid ejected, in consideration of the factors of solid impurities in liquid loading, avoiding excessive pressure drops before and after injection, nozzle diameter is 6mm; about 50% of the droplets of the diameter can be controlled within a range of 0.09~0.12mm; the nozzle head length equals the diameter of the nozzle; the degree of disturbance can be enhanced by increasing the number of nozzles of the fluid within the bottom of the well. But the difference of combinations and spatial layout can head above the droplet collision, coalescence, drop impact. The center atomizing nozzle located above other nozzles can effectively weaken the day gas production parameters on the vortex liquid separation tools, enhance the adaptability of vortex tool. The security distance between the spray nozzle and the tools is determined about 181~185mm. The numerical simulation of three-dimensional model calculation shows that an optimized spray nozzle vortex tools can help to curb the occurrence of fluid intrusion,the wellbore pressure energy loss, the of water lock effect, to further study the mechanical drainage gas field tools test and applications to provide theoretical support and guidance.