The Melut Basin is an important petroliferous rift basin in Africa, and a large number of structural hydrocarbon accumulations of the Paleogene Yabus and Samma Formations have been discovered in it. However, there are few published research results and exploration discoveries on stratigraphic hydrocarbon accumulations in the Melut Basin. Based on information from the evaluation of the lithology assemblage, oil-source, migration pathway, preservation condition and the detailed analysis of typical exploration cases, the favorable exploratory interval, formation conditions and accumulation characteristics of the stratigraphic hydrocarbon accumulations have been studied in the northern Melut sub-basin. The sedimentary facies study indicated that the Upper Yabus Formation developed widespread delta front deposits with the lithology assemblage of “sand wrapped by mud”, which was conducive to forming depositional stratigraphic traps dominated by facies change or depositional pinchout. The Adar Formation is a set of mudstone deposition with a thickness of 200-600m above the Yabus Formation and well sealed the Yabus and Samma hydrocarbon accumulations as the regional top seal. The parameters of organic matter, and the thickness and distribution of source rocks showed that the Al Renk Formation has good source rock quality with an average TOC value of 2.08% wt. and type II kerogen prone to oil generation. The thermal modelling revealed that the Al Renk source rocks continuously generated and expelled hydrocarbon since the Late Cretaceous to the present and provided sufficient oil source for the Upper Yabus stratigraphic traps. The tectonic evolution research showed that the multi-stage rifting cycles made the Melut Basin develop numerous normal faults, which provided essential vertical migration pathways for the hydrocarbon charging of the Paleogene stratigraphic traps. Among these faults, the basinal border faults and the intra-basinal late-rifting faults are the primary hydrocarbon conduit faults. The details of exploration cases showed that the hydrocarbon conduit faults are the key controlling factors for the formation of the Upper Yabus stratigraphic hydrocarbon accumulations, and the stratigraphic traps jointly dominated by lithology change (depositional pinchout) and hydrocarbon conduit faults have low hydrocarbon filling risk. The sandstones of the Upper Yabus Formation are shallow (700-2500m) and have high porosity with a value of greater than 20% and high oil production of a few hundred to more than 1,000 barrels per day. Therefore, the Upper Yabus Formation develops favorable petroleum geology conditions for the formation of stratigraphic hydrocarbon accumulations, and exploring such stratigraphic traps is of great significance to the increasing exploration in the mature northern Melut sub-basin.

麦卢特盆地是非洲重要的石油裂谷盆地，并且在其中发现了古近纪Yabus和Samma地层的大量结构性油气藏。但是，关于Melut盆地地层油气成藏的研究成果和勘探发现很少。基于对岩性组合评价，油源，运移路径，保存条件和典型勘探案例的详细分析资料，对北部地区地层油气成藏有利的勘探区间，形成条件和成藏特征进行了研究。 Melut子流域。沉积相研究表明，上耶布斯组发育了广泛的三角洲前缘沉积物，其岩性组合为“泥包裹”，这有利于形成以相变或沉积夹层为主的沉积地层圈闭。阿达尔组是一组沉积岩，沉积在Yabus组之上，厚度为200-600m，并很好地封闭了Yabus和Samma碳氢化合物的聚集体，作为区域顶封。有机质参数以及烃源岩的厚度和分布表明，Al Renk组烃源岩质量良好，平均TOC值为2.08％wt。和II型干酪根易于生油。热模型表明，自白垩纪晚期到现在，Al Renk烃源岩不断产生和排出碳氢化合物，并为上Yabus地层圈闭提供了充足的油源。构造演化研究表明，多阶段的裂陷循环使梅洛特盆地发育出许多正断层，为古近系地层圈闭的油气充注提供了必不可少的垂直运移途径。在这些断层中，盆地边界断层和基底内后期裂谷断层是主要的油气管道断层。勘探案例的详细情况表明，油气导管断层是形成上耶布斯地层油气聚集体的关键控制因素，地层学圈闭由岩性变化（沉积收缩）和油气管道断层共同控制，具有较低的油气充注风险。上亚布斯组的砂岩很浅（700-2500m），孔隙率很高，其值大于20％，每天的石油产量高出数百至1,000桶。因此，上亚布斯组为层状烃聚集体的形成提供了良好的石油地质条件，探索此类地层圈闭对成熟的北部梅洛特次盆地不断增加的勘探具有重要意义。上亚布斯组的砂岩很浅（700-2500m），孔隙率高，其值大于20％，每天的石油产量高出数百至1,000桶。因此，上亚布斯组为层状油气藏的形成提供了良好的石油地质条件，勘探此类地层圈闭对成熟的北部梅洛特次盆地不断增加的勘探具有重要意义。上亚布斯组的砂岩很浅（700-2500m），孔隙率高，其值大于20％，每天的石油产量高出数百至1,000桶。因此，上亚布斯组为层状油气藏的形成提供了良好的石油地质条件，勘探此类地层圈闭对成熟的北部梅洛特次盆地不断增加的勘探具有重要意义。