Optimization Design and Application of Vortex Drainage Gas Recovery

The vortex drainage gas recovery technology has the advantages of no need for moving pipe column and long maintenance period. In order to meet the demand of stable production of gas wells in Daqing oilfield, the physical process of vortex drainage gas recovery is analyzed. The numerical simulation model is established according to the characteristics of two-phase flow. The optimization design software of vortex tool is compiled by using VB software. Through the mechanism and numerical simulation results of the vortex tool, the geometric parameters of vortex tools suitable for gas well parameters in Daqing oilfield are optimized by using parameter optimization software. The positioning depth of vortex tool is calculated by following the Bernoulli equation. The field test application shows that vortex tool has realized the effective separation of water–gas and changes the flow state of the mixed phase water–gas. It is beneficial to natural gas output and increases the gas production. The vortex drainage gas recovery technology provides a technical support for the sustained and stable production of Daqing oilfield.