It is considered that thick mudstone, fault and face varication can form fluid barrier, which is supported by hydrochemistry fingerprinting, pressure-depth relationship and reservoir geology.

• 认为，垂向上较厚的泥岩、横向上断层及相带变化等均可形成流体屏障，这得到了水化学指纹、压力-深度关系、油藏地质的一致证实。水化学指纹是一种判别流体屏障的有效方法。