莺歌海盆地超压流体活动与断裂系统的相互关系

莺歌海盆地内超压流体活动十分强烈，主要活动形式有侧向对流型和垂向对流型，将超压流体的演化与区域构造演化结合起来，对断裂与超压流体的成因关系提出了新见解，揭示出断裂对超压流体的输导及超压流体对断裂的开启的相互作用。张裂隙作为超压流体活动的诱导，超压的幕式突破就主要起因于上覆负载层中的断裂、破碎带，发生压力释放；而普遍发生的幕式流体释放又进一步开启垂直裂隙，造成上下地层间的连通，从而作为超压突破的诱因。

Correlations between Overpressure Fluid Activity and Fault System in Yinggehai Basin

The correlations between the fault system and the overpressure fluid activity have been studied based on an integrated analysis of faults, overpressure fluids and their geodynamic evolution in Yinggehai basin. Furthermore, their constrained relationship has been proposed. Faults first induced episodic explosion of overpressure fluids, overpressure fluid activity deduced chiefly faults or fractures, including hydrologic fractures, in overlying strata in succession, and then overpressure was released along these faults and fractures. Meanwhile, overpressure fluid activity opened new faults or promoted previous faults, which would serve as predisposition for further overpressure fluid explosion.