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歧南断阶带的成岩-孔隙演化模式表明,研究区内特定的成岩-孔隙演化史有利于深层沙河街组二段砂岩孔隙的保存.这一演化史的典型特征包括:储层深埋时间短;烃类流体侵入砂岩孔隙较早;快速埋藏期间的超压流体活动;碳酸盐胶结不普遍;石英的压溶作用受到抑制.各成岩动力学过程与孔隙演化之间的时空组合是导致研究区深部发育砂岩储层的直接原因.深层砂岩孔隙的发育程度及保存状况与各成岩动力学过程间的匹配关系极为密切.
The diagenetic-pore evolution patterns of the Qiyan fault zone show that the specific diagenesis-pore evolution history in the study area is conducive to the preservation of the sandstone pores in the second member of the Shahejie Formation in the study area.The typical features of this evolutionary history include: Hydrocarbon fluids infiltrated the sandstone pores earlier, overpressured fluid activities during rapid burial, carbonate cementation was not universal, and the pressure-dissolving effect of quartz was inhibited.The spatio-temporal combination of kinetic processes and pore evolution resulted in The direct reason for the deep development of sandstone reservoirs in the study area is that there is a close relationship between the development degree and preservation status of deep sandstone pores and the matching process of each diagenetic kinetic process.