多旋回复杂碳酸盐岩储层渗透率测井评价

Logging evaluation of perm eability ofmulticyclic carbonate rock reservoirs in theM iddle Sichuan Basin

刘宏

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 multicyclic carbonate reservoirs in the2 nd interval of the2 nd member of the Lower Triassic Jialingjiang Formation in theMoxi gas field as an example，and from the perspective ofm icroscopic pore-throat structure and reservoir genesis，this paper puts forward a geology-constrained logging evaluation method of permeability based on experimental data such as core observation，physical property analysis，mercury penetration，cast and electron scanningm icroscope.Various logging interpretationmodels ofpermeability are setup according to different lithologies and pore-throat structures.Practical application shows that permeability obtained with this method correlateswellwith core analysis and can accurately characterize permeability ofmulticyclic carbonate reservoirswith great heterogeneity.This new method provides another reliable tool for reservoir evaluation.

10.11743/ogg20100518