Figure 9.
Panel a shows adjusted pore pressure in kilo pascals over elapsed time from 5390 to 5460 days for measurement points U R 903, U R 904, U R 905, U R 906, U R 908, and U R 910. Values range from about 80 to 150 kilo pascals before 5415 days, then increase sharply near 5420 days to about 120 to 240 kilo pascals, followed by gradual decrease towards 5460 days. Panel b shows adjusted pore pressure for measurement points P R 903, P R 904, P R 905, P R 906, and P R 910, where values increase sharply near 5420 days from about 100 to 400 kilo pascals, then gradually decrease to about 120 to 250 kilo pascals by 5460 days. Vertical dashed lines mark events labelled 8 and 9.Details of radial stress and pore fluid pressure at the rock wall around the time of gas entry. (a) Pore pressure at the deposition wall, and (b) radial stress on the deposition wall