Deliquification techniques and prevention: A case study for the southern Pannonian basin

Liquid loading in gas wells leads to production challenges and decreases the overall recovery from these wells. Gas wells affected by liquid loading struggle to eliminate the liquid that accompanies the produced gas from the wellbore. The primary cause of liquid loading is a low gas flow rate or gas velocity. When the gas velocity falls below the critical threshold needed to transport liquid to the surface, the liquid begins to accumulate in the vertical section of a well, the lateral section of a horizontal well, and even within hydraulic fractures. Another indication of liquid loading is the high casing over tubing pressure. The focus of the case study on an onshore gas well is addressing the issue of liquid loading in Southern Pannonian Basin conditions. A well was selected that experienced a gradual decline in production and head pressure. A model was created using PipeSim software, followed by a sensitivity analysis under various operational scenarios. The significance of this study lies in optimizing the well parameters to prevent the occurrence of liquid loading. The paper is structured around relevant works, background, case study, methodology, results, and conclusions.