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本文针对大港探区深层普遍发育的异常孔隙的成因机理进行了探讨性的研究。首次提出了受异常超压的影响,深层成岩演化序列发生改变:即深层伊蒙混层关系倒置;储集体内发育的异常孔隙(原生、次生)受烃类的早期注入、化学溶蚀和超压保存机制的共同控制等新观点、新认识,有效地指导了大港探区深层的勘探部署。
In this paper, we investigate the genesis mechanism of abnormal pores deeply developed deep in Dagang exploration area. It is proposed for the first time that due to the abnormal overpressure, the sequence of deep diagenetic evolution changes: that is, the relationship between the deep layers of Yimeng mixed layers is reversed; the abnormal pores (primary and secondary) developed in the reservoir are affected by the early hydrocarbon injection, chemical dissolution and overpressure Preservation mechanism common control of new ideas and new understanding, effectively guided the deep exploration and deployment of Dagang exploration area.