Figure 21
From: Physical simulation for water invasion and water control optimization in water drive gas reservoirs

Pressure distributions at different stages of Experiment 4-1 (Model 2, infinite aquifer): (a) stable production of Well 1 ended -23 min, (b) end of the stabilized period of Well 2—45 min, (c) late production period -70 min, and (d) gas well production halted—142 min.