Research Article

Gas Network Development in Compact Bentonite: Key Controls on the Stability of Flow Pathways

Table 2

Summary of experimental history showing the test stage, the elapsed time in days at the start of each test stage, injection flow rate, injection pressure, and back pressure. Types of tests are CFRT = constant flow rate test; PDT = pressure decay test; CPT = constant pressure test.

Test stageTypeTime (days)Flow rate (μl/h)Injection pressure (MPa)Back pressure (MPa)Notes

[A]CFRT720.31251.0
[B]CFRT838.3631.0
[C]CFRT855.231.51.0
[D]PDT866.601.0Injection pump stopped
[E]CFRT884.231.51.0
[F]CFRT898.4631.0
[G]CFRT945.01261.0
[H]CPT948.37.861.0
[I]CFRT1016.41711.0
[J]CFRT1084.31711.0Radial flow array 3 isolated
[K]PDT1161.701.0Injection pump stopped