Free gas is present in this zone with about 2-3% of the pore space. BSR is strongerthan that without free gas below GHSZ.

• 深部含有少量游离气,呈不连续的层状分布,饱和度占孔隙空间的2-3%25,局部层位饱和度比较高,达到6-7%25且BSR比较清晰。