The review of underground gas storage（UGS） capacity is influenced by multiple factors. Optimizing this capacity is crucial for achieving global optimization of UGS design parameters. The W23 UGS in Dongpu sag serves as a case study to explore the effects of formation water intrusion

salt deposition

stress sensitivity

and produced liquid on storage capacity utilization. A new model for reviewing the storage capacity

tailored to the specific conditions of W23 UGS

was developed and its feasibility was assessed. The results indicate that

the W23 UGS exhibits low porosity and permeability

strong vertical heterogeneity

but weak lateral heterogeneity

characteristic of a weak edge water-driven gas reservoir. Factors such as the original gas storage volume

salt deposition

stress sensitivity

vertical production degree

formation water invasion

and produced liquid significantly impact the storage capacity of W23 UGS. The final check of the effective gas storage volume was calculated to be 3 679.51×10

4

m³

which is 3.9% lower than the originally estimated volume. Regionally

the effective volume after the first-stage review was 3 013.47×10

4

m³

representing 97.3% of the original storage volume. Meanwhile

an additional effective volume of 666.04×10

4

m³

accounting for 91.1% of the original volume

was identified. The main reasons for the reduced review results include the impacts of stress sensitivity

formation water intrusion

and vertical utilization

which collectively led to a decrease in the effective gas storage volume.