The Messinian Abu Madi Formation represents the most prospective reservoir target in the Nile Delta. Hydrocarbon exploration endeavors in Nile Delta over the last few decades highlighted some uncertainties related to the predictability and distribution of the Abu Madi best reservoir quality facies. Therefore, this study aims at delineating the factors controlling the petrophysical heterogeneity of the Abu Madi reservoir facies in Faraskour Field, northeastern onshore part of the Nile Delta. This work provides the very first investigation on the reservoir properties of Abu Madi succession outside the main canyon system. In the study area, Abu Madi reservoir is subdivided into two sandstone units (lower fluvial and upper estuarine). Compositionally, quartzose sandstones (quartz > 65%) are more common in the fluvial unit, whereas the estuarine sandstones are often argillaceous (clays > 15%) and glauconitic (glauconite > 10%). The sandstones were classified into four reservoir rock types (RRTI, RRTII, RRTIII, and RRTIV) having different petrophysical characteristics and fluid flow properties. RRTI hosts the quartzose sandstones characterized by mega pore spaces (R₃₅ > 45 µm) and a very well-connected, isotropic pore system. On the other side, RRTIV constitutes the lowest reservoir quality argillaceous sandstones containing meso- and micro-sized pores (R₃₅ > 5 µm) and a pore system dominated by dead ends. Irreducible water saturation increases steadily from RRTI (S_wir ~ 5%) to RRTIV (S_wir > 20%). Additionally, the gas–water two-phase co-flowing characteristics decrease significantly from RRTI to RRTIV facies. The gaseous hydrocarbons will be able to flow in RRTI facies even at water saturation values exceeding 90%. On the other side, the gas will not be able to displace water in RRTIV sandstones even at water saturation values as low as 40%. Similarly, the influence of confining pressure on porosity and permeability destruction significantly increases from RRTI to RRTIV. Accordingly, RRTI facies are the best reservoir targets and have high potentiality for primary porosity preservation.

墨西尼的阿布马迪组是尼罗河三角洲最有前景的储层目标。过去几十年来，尼罗河三角洲的油气勘探工作突显出一些与阿布马迪最佳储层质量相的可预测性和分布有关的不确定性。因此，本研究旨在描述控制尼罗河三角洲东北陆上Faraskour油田Abu Madi油藏相岩石物理非均质性的因素。这项工作提供了对主要峡谷系统以外的阿布·马迪演替的储层性质的首次调查。在研究区域中，阿布马迪水库分为两个砂岩单元（河床下部和河口上部）。从组成上来说，在河流单元中石英砂岩（石英> 65％）更常见，而河口砂岩通常是泥质的（粘土> 15％）和青灰质的（青灰石> 10％）。砂岩被分为具有不同岩石物理特性和流体流动特性的四种储集岩类型（RRTI，RRTII，RRTIII和RRTIV）。RRTI的石英砂岩具有巨大的孔隙空间（R ₃₅  > 45 µm）和非常紧密连接的各向同性孔隙系统。另一方面，RRTIV构成了储层质量最低的泥质砂岩，包含中细孔和微小孔（R ₃₅  > 5 µm）和以死角为主的孔系统。束缚水饱和度从RRTI（稳步增加小号_WIR  〜5％）至RRTIV（小号_WIR > 20％）。此外，从RRTI到RRTIV相，气水两相同流特征显着降低。即使在水饱和度值超过90％时，气态烃也将能够在RRTI相中流动。另一方面，即使在水饱和度低至40％的情况下，该气体也无法驱替RRTIV砂岩中的水。同样，围压对孔隙度和渗透率破坏的影响从RRTI到RRTIV显着增加。因此，RRTI相是最好的储层目标，具有很大的储层潜力。