# [[Petroleum generation|generation]] or migration ends,
# [[Petroleum generation|generation]] or migration ends,
# the trap reaches its spill point, or
# the trap reaches its spill point, or
−
# capillary pressure is sufficient to force hydrocarbons into the seal (displacement pressure is exceeded), allowing the seal to leak.
+
# capillary pressure is sufficient to force hydrocarbons into the seal ([[top seal displacement pressure|displacement pressure]] is exceeded), allowing the seal to leak.