This paper presents a novel petrophysical experiment for measuring the 3D permeability tensor at reservoir conditions in fractured vuggy carbonate rock. The permeability variation with confining pressure is demonstrated through the experimental investigation; the permeability ellipse plots show the decrease of permeability, as a function of the increase in effective stress. The experiment was developed at reservoir conditions (120 °C temperature and variable confining pressure) in a native whole rock sample, from the Gulf of Mexico naturally fractured and vuggy reservoir. The analysis of the laboratory data reveals the elliptical behavior of permeability. Two ellipses were generated, one corresponding to the fracture network (secondary porosity system) and another for matrix porosity and permeability (primary porosity system). An important result is the compaction of the representative fracture network ellipse until it fuses with the matrix porosity ellipse at a high confining pressure state. The test contributes to the understanding of the mechanical and flow aspects of permeability, for naturally fractured reservoirs. The experimental results provide a basis for improving reservoir simulation studies, to obtain realistic predictions of reservoir behavior.

中文翻译：

---

破裂碳酸盐岩的实验渗透率张量

本文提出了一种新的岩石物理实验，用于测量裂缝性孔洞碳酸盐岩储层条件下的 3D 渗透率张量。通过实验研究证明了渗透率随围压的变化；渗透率椭圆图显示渗透率随有效应力增加而下降。该实验是在储层条件（120 °C 温度和可变围压）下在天然全岩样品中开发的，来自墨西哥湾天然裂缝和孔洞储层。对实验室数据的分析揭示了渗透率的椭圆行为。生成了两个椭圆，一个对应于裂缝网络（二次孔隙度系统），另一个对应于基质孔隙度和渗透率（一次孔隙度系统）。一个重要的结果是压实有代表性的裂缝网络椭圆，直到它在高围压状态下与基质孔隙度椭圆融合。该测试有助于了解天然裂缝性储层渗透率的力学和流动方面。实验结果为改进储层模拟研究提供了基础，以获得对储层行为的真实预测。