Justification for the rational depression on the reservoir of watered gas wells to enhance gas recovery of the field at the late stage of development

The article presents a new method for calculating rational depression on the reservoir during the operation of flooded gas wells at fields at a late stage of development. The proposed approach combines multiple criteria for operational regimes, establishing an acceptable range of reservoir depressions. The optimal depression value is then determined through comparative analysis of key technological performance indicators derived from hydrodynamic modeling of various development scenarios. The methodology was validated on six watered gas wells in a field characterized by a high content of corrosive components in Valanginian deposits. Results demonstrate that applying the optimal depression range enhances gas recovery, mitigates operational risks, and minimizes equipment corrosion. The study emphasizes the significance of maintaining a stable flow regime to prevent issues such as liquid plugs while maximizing annual gas production. This approach contributes to the efficient and safe exploitation of gas reservoirs at advanced stages of depletion, extending field life and improving recovery rates.