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以四川盆地中部磨溪气田下三叠统嘉陵江组二段第二亚段多旋回碳酸盐岩为例,通过岩心观察,利用物性分析、压汞、铸体、扫描电镜等实验室分析资料,从储层微观孔喉结构及储层成因机理出发,提出地质约束条件下的渗透率测井评价方法。根据不同岩性及不同孔喉结构建立储层渗透率测井解释模型。实际应用效果表明,利用该方法所得到的渗透率与岩心分析数据相关性较好,其结果能准确表征非均质性极强的多旋回复杂碳酸盐岩储层渗透率,为储层评价提供可靠依据。
Taking the second member of the second member of the Lower Triassic Jialingjiang formation in the Moxi gas field of central Sichuan Basin as an example, through the core observation, the laboratory analysis data of physical properties, mercury intrusion, casting body and scanning electron microscope Based on microscopic pore-throat structure and reservoir genetic mechanism, a logging evaluation method of permeability under geological constraints is proposed. According to different lithology and different pore-throat structure, the reservoir permeability logging interpretation model is established. The practical application results show that the permeability obtained by this method has a good correlation with the core analysis data, and the results can accurately characterize the permeability of the highly heterogeneous complex polycyclic carbonate reservoir for reservoir evaluation Provide a reliable basis.