Hi Hamra,

APB is an inherent part of the well-construction cycle, and will manifest itself in any enclosed annulus which is subjected to elevated temperatures after the primary cement has set.
As long as you have access to the annulus, which I assume is your case because you mention that APB is >150 bar, so we are talking about a surface wellhead/dry tree, and not a subsea wellhead/wet tree, you manage the APB by bleeding of to avoid rupture/collapse of the external/internal casings