Only mudstone caprock of K1 q(superscript m) in well Sheng 65 has been broken and over-pressure has been released.Thus the first evolution was completed and the second evolution began.

• 结果表明：汪家屯气田只有升65井青山口组泥岩盖层曾在嫩四段沉积中期发生过破裂超压释放，已完成了1次演化，目前进入第2次演化阶段；