Gas Migration Tests are conducted to determine if the well has a gas migration problem. For the purpose of this test, gas migration can be defined as the movement of methane or other gases from a subsurface zone to surface through a barrier that should prevent it’s movement, whether this barrier is natural (overburden, shale) or artificial (cement sheath, external casing packed, pipe joints, plug, etc.).
A “yes” or “no” may significantly change an operator’s abandonment program or may affect the right to produce the well without first addressing the apparent problem.
PIT’s method of gas migration testing conforms to the Lloydminster Area Operators Group Gas Migration Team (LAOGMT) procedures, which the AER endorses as the recommended procedure for this type of testing.