The main purpose of this work is to assess the sedimentological characteristics and their effect on reservoir quality of the oil/gas producer Abu Roash “G” Member (Late Cenomanian) in Abu Sennan area, north Western Desert, Egypt. Abu Roash “G” Member is subdivided into three units: the lower, middle, and upper. Petrographically, the lower unit composed of quartz wacke, lithic graywacke, pack-wackstone, shale, silty shale, quartz arenite, and sandy calcareous shale. The middle unit consists of calcareous shale, silty shale, and sandy shale. On the other hand, the upper unit is dominated by sandy shale, shale, and quartz arenite. These microfacies association suggests shallow marine depositional environment. This member was subjected to different types of diagenetic process such as compaction, biogenic alteration, dissolution, cementation, and neomorphism. Some of these processes lead to porosity enhancement such as dissolution, while the later-on filling of the fractures by silica/calcite destructs the reservoir quality. This is because the resulted fractures are filled later by calcite/silica minerals. The sedimentological characteristics wittnessed the heterogeneity of the Abu Roash “G” Member as a result of depositional setting and diagenesis. Petrophysically, the Abu Roash “G” Member is a heterogeneous reservoir in terms of fluid flow properties, where three flow units with different capabilities are involved. Reservoir performance would be different among the contained microport, mesoport, and macroport flow units.

这项工作的主要目的是评估埃及西北部沙漠阿布森南地区油气生产者阿布罗什“G”段（晚塞诺曼阶）的沉积学特征及其对储层质量的影响。Abu Roash “G” 成员细分为三个单元：下层、中层和上层。岩石学上，下部单元由石英碎屑、岩屑灰泥、充填砂砾岩、页岩、粉砂质页岩、石英砂岩、砂质钙质页岩组成。中间单元由钙质页岩、粉质页岩和砂质页岩组成。另一方面，上部单元以砂质页岩、页岩和石英砂岩为主。这些微相组合暗示了浅海沉积环境。该段经历了不同类型的成岩作用，如压实、生物蚀变、溶解、胶结、和新态。其中一些过程会导致孔隙度增加，例如溶解，而随后由二氧化硅/方解石填充裂缝会破坏储层质量。这是因为产生的裂缝后来被方解石/二氧化硅矿物填充。由于沉积环境和成岩作用，沉积学特征见证了阿布罗什“G”段的非均质性。从岩石物理角度看，阿布罗什“G”段在流体流动特性方面是一个非均质储层，其中涉及三个具有不同能力的流动单元。所包含的微端口、中端口和大端口流量单元的储层性能会有所不同。而二氧化硅/方解石随后填充裂缝会破坏储层质量。这是因为产生的裂缝后来被方解石/二氧化硅矿物填充。由于沉积环境和成岩作用，沉积学特征见证了阿布罗什“G”段的非均质性。从岩石物理角度看，阿布罗什“G”段在流体流动特性方面是一个非均质储层，其中涉及三个具有不同能力的流动单元。所包含的微端口、中端口和大端口流量单元的储层性能会有所不同。而二氧化硅/方解石随后填充裂缝会破坏储层质量。这是因为产生的裂缝后来被方解石/二氧化硅矿物填充。由于沉积环境和成岩作用，沉积学特征见证了阿布罗什“G”段的非均质性。从岩石物理角度看，阿布罗什“G”段在流体流动特性方面是一个非均质储层，其中涉及三个具有不同能力的流动单元。所包含的微端口、中端口和大端口流量单元的储层性能会有所不同。从岩石物理角度看，阿布罗什“G”段在流体流动特性方面是一个非均质储层，其中涉及三个具有不同能力的流动单元。所包含的微端口、中端口和大端口流量单元的储层性能会有所不同。从岩石物理角度看，阿布罗什“G”段在流体流动特性方面是一个非均质储层，其中涉及三个具有不同能力的流动单元。所包含的微端口、中端口和大端口流量单元的储层性能会有所不同。