Figure 14.
The graph illustrates the relationship between gas pressure, measured in megapascals, and time in days for three models, Model A represented by a solid orange line, Model B by a dashed blue line, and Model C by a solid grey line. The vertical axis indicates gas pressure, ranging from 0 to 5 megapascals, while the horizontal axis shows time from 0 to 400 days. Annotated phases include first B T phase 2, second B T phase 2, and first B T phase 4, along with marked steps for gas injection and draining processes. Key points are highlighted with red squares, indicating significant data points. Sections are labelled for saturation and re saturation phases, and the graph is divided into distinct regions showing each model’s performance during these phases.Comparison of measured and computed back pressures in Phases II and IV for Models A, B, and C