Unconventional reservoirs have burst with a great force in the oil and gas worldwide production. Reefal limestone reservoir is one of them. The present study deals with the reefal carbonate Hammam Faraun Member in Al-Hamd oil field. This study focus on the interpretation of sedimentological and petrophysical data to show the effect of diagenetic processes on middle and lower Miocene reefal carbonate reservoirs in Al-Hamd oil field. Comprehensive petrophysical analysis for Hammam Faraun Member was performed using wireline logs and core data to determine the proper petrophysical parameters. Of the reservoir intervals. The analytical reservoir rock achieving the main reservoir parameters as shale content (V_sh), effective porosity (Ø_eff), water and hydrocarbon saturation (S_W and S_hr) as well as the net-pay thickness. The Formation Micro Imager (FMI) was also applied to detect the variation, types, and directions of the fracture systems that present in the lower and middle Miocene reefal limestone reservoir. Petrographic analysis was done, indicating the presence of a clear effect of diagenetic factors on the quality, productivity, and efficiency of the reefal limestone reservoirs behavior. The diagenetic factors include dolomitization, slicification, recrystallization, and solution process which affect greatly the petrophysical characteristics of the reefal carbonate Hammam Faraun reservoir in the study area. The core analyses were also used to detect the paleo environment, associated textural/ lithological and sedimentological characteristics to gain and understand the factors responsible for the productivity behavior of the reservoir in the Al-Hamd oil field. Rock facies have been divided as specific characteristics and were further described considering their color, texture, grain-size characteristics, and the depositional and biogenic sedimentary structures.

非常规油藏在全世界的石油和天然气生产中爆发出了巨大的力量。礁形石灰岩储层就是其中之一。本研究涉及Al-Hamd油田的礁形碳酸盐碳酸盐Hammam Faraun成员。本研究着重于沉积学和岩石物理数据的解释，以显示成岩作用对Al-Hamd油田中下中新统礁碳酸盐岩储层的影响。使用电缆测井和核心数据对哈马姆·法劳恩成员进行了全面的岩石物理分析，以确定适当的岩石物理参数。的水库间隔。分析储集岩实现主储存参数页岩含量（V _SH），有效孔隙率（Ø _EFF），水和碳氢化合物饱和度（S _W和S _hr）以及净工资厚度。地层显微成像仪（FMI）也被用于检测中新世礁中下部石灰岩储层中存在的裂缝系统的变化，类型和方向。进行了岩相分析，表明成岩作用因素对珊瑚礁石灰岩储层行为的质量，生产力和效率存在明显影响。成岩因素包括白云石化，成矿作用，重结晶和固溶过程，对研究区暗礁碳酸盐岩哈马姆·法劳恩储层的岩石物性有很大影响。核心分析还用于检测古环境，相关的质地/岩性和沉积学特征，以获取并了解负责Al-Hamd油田储层产能行为的因素。岩石相已被划分为特定特征，并考虑了它们的颜色，质地，粒度特征以及沉积和生物成因的沉积结构进行了进一步描述。