This work integrates seismic and well log data to establish a 3D reservoir model of the Q-Field, which is a prolific onshore hydrocarbon field situated in the Central Swamp Depobelt of Nigeria. The subsurface modeling focuses on the four principal clastic reservoir intervals of the Agbada Formation (D6200, D7000, D9000 and E2000), which was deposited in a deltaic to fluvio-deltaic system during Eocene. The seismic-based structural modeling inferred an extensional set-up dominated by NW–SE trending normal faults. Reservoirs are sand-dominated and laterally extensive, as interpreted from the 3D facies model. Well log-based petrophysical parameters were up-scaled and distributed stochastically using the Sequential Gaussian Simulation method to generate a 3D reservoir property model. Lateral and vertical heterogeneities of the reservoir properties were inferred from the 3D models. In general, the clastic reservoirs exhibit 18–22% porosity, 62–105 mD permeability, moderate to good net-gross thickness, and 36–74% water saturation. Hydrocarbon accumulation was primarily restricted within the anticlines. Gas-down-to exists in the upper three reservoirs (D6200, D7000 and D9000) at 10,577 ft (1 ft = 0.3048 m), 10,756 ft and 11,389 ft, respectively. Gas–oil and oil–water contacts in the E2000 reservoir were interpreted to be at 11,812 ft and 11,886 ft, respectively. Based on the hydrocarbon distribution, oil and gas-in-place volumes were estimated for all the reservoir intervals. The comprehensive 3D modeling work addressed the spatial distribution of the studied reservoir properties and can be directly useful for planning better the future wells for field development.

这项工作整合了地震和测井数据，建立了Q场的3D储层模型，这是位于尼日利亚中央沼泽Depobelt的多产陆上油气田。地下模拟的重点是阿巴达达组的四个主要碎屑储集层段（D6200，D7000，D9000和E2000），它们在始新世期间沉积在三角洲至河流三角洲系统中。基于地震的结构建模推断出一个由西北走向东南的正断层主导的伸展构造。如3D相模型所解释的，储层是砂质为主的，且横向扩展。使用顺序高斯模拟方法按比例放大并随机分布基于测井的岩石物理参数，以生成3D储层属性模型。从3D模型推断出储层属性的横向和纵向非均质性。通常，碎屑岩储层的孔隙度为18–22％，渗透率为62–105 mD，净毛厚度中等至良好，含水饱和度为36–74％。碳氢化合物的积累主要受到背斜的限制。上部三个储层（D6200，D7000和D9000）的瓦斯向下压力分别为10,577英尺（1英尺= 0.3048 m），10,756英尺和11,389英尺。E2000油藏中的油气接触和油气接触分别被解释为在11,812英尺和11,886英尺。根据碳氢化合物的分布情况，估算了所有储集层段的油气储量。