Well, to understand the theory, you would have to do nodal analysis calculations to identify critical flow rates. Learn to use the Turner correlation. Also, try and get hold of the book "Gas well deliquification, 2nd ed." by Lea, Nickens and Wells from Gulf publishing.

You will then be able to identify and hopefully accurately predict unstable situations. But let me tell you up front that here, theory does not always get reflected in practice - too many unknown variables!!