New method of downhole throttling parameter optimization design for water produced gas wells

Applying traditional downhole throttling calculation model to water produced gas wells in Sulige field, characterized with low permeability, low pressure, and low abundance, there is a big error in the calculation of the parameters of the gas well downhole throttling process, which will affect the output of the gas well and the final recovery, and the liquid carrying ability can not be fully played.The paper theoretically set up a new model that gas-liquid mixture flowing through the throttle device, based on the energy equation which the liquid phase mass fraction is introduced into, combined with the wellbore pressure calculation model with high gas-liquid ratio, the temperature calculation model based on the wellbore radial heat transfer, the throttling pressure and temperature drop model. Based on this, the downhole throttling process parameters calculation software was compiled for water produced gas wells. Sulige SuAA well was used as an example to be compared with published method, and the results show that the design parameters of the new method are matched with the actual production conditions, the gas well production is stable, and it can keep the gas well continuous liquid production. The method has good application effect and has a certain popularization and application value.