Abstract Improving exploration and development techniques of fossil fuels are essential for continuous reserves development. Although there are many oil discoveries in the Razzak Area (North Western Desert, Egypt), there are also many dry wells. Therefore, the tectonic setting and reservoirs characterization of the study area has to be fully understood. Twenty 2D highly filtered stack zero-phase seismic sections and logging data of four wells were analyzed. According to seismic sections and structure contour maps (both time and depth), there is one major structural high (horst). It is a part of the regional Jurassic rift system. The NE Jurassic rifts continued during the deposition of the Early Cretaceous strata as growth faults and have been rejuvenated during the closure of the Neotethys Ocean. During the Late Cretaceous, the compressional stress resulting from the collision between African and Eurasian plates has led to the inversion of the Razzak basin, where some segments of the main faults are transformed from normal to reverse and the hanging walls formed plunging drag fold, which was dissected by a set of NW-SE normal faults. Four prospective closures in the Razzak Field were highlighted. Based on integrated petrophysical tools (Gamma Ray, Sonic Log, Resistivity Deep, Neutron Porosity, and Bulk Density) in four wells (NRZK-1, NRZK2, NRZK-3, and NRZK-4), the Aptian Alamein Formation (mainly dolomite) was interpreted to be a good reservoir and can be subdivided into two zones (Upper Alamein and Lower Alamein) with different reservoir quality. In addition, 3D structure, facies, and petrophysical models were built based on integrated geological and petrophysical data. The results indicated that integrating both seismic profiles with logging data, even from a small number of wells, is highly valuable in evaluating reservoir quality and defining future prospective.

中文翻译：

---

North Razzak 油田（埃及西北沙漠）中 Aptian Alamein 组的储层特征和 3D 建模

摘要 提高化石燃料勘探开发技术是实现储量持续开发的必要条件。尽管在 Razzak 地区（埃及西北沙漠）有许多石油发现，但也有许多干井。因此，必须充分了解研究区的构造背景和储层特征。分析了4口井20个二维高度滤波叠加零相地震剖面和测井资料。根据地震剖面和构造等高线图（时间和深度），有一个主要构造高（horst）。它是区域侏罗纪裂谷系统的一部分。NE侏罗纪裂谷在早白垩世地层作为生长断层沉积期间继续存在，并在新特提斯洋闭合期间恢复活力。在白垩纪晚期，非洲板块与欧亚板块碰撞产生的压应力导致拉扎克盆地发生倒转，主断层部分段由正反转变，上盘形成下陷式拖曳褶皱，被一组断层剖开。 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NW-SE 正常故障。突出强调了 Razzak 油田的四个预期关闭。基于四口井（NRZK-1、NRZK2、NRZK-3和NRZK-4）的综合岩石物理工具（伽马射线、声波测井、电阻率深度、中子孔隙度和体积密度），Aptian Alamein组（主要是白云岩）被解释为一个良好的储层，可以细分为两个区域（上阿拉曼和下阿拉曼），具有不同的储层质量。此外，3D 结构、相、基于综合地质和岩石物理数据建立岩石物理模型。结果表明，将两个地震剖面与测井数据相结合，即使来自少量井，对于评估储层质量和确定未来前景也非常有价值。