古河流水文参数,是分析预测沉积盆地内陆源碎屑岩储层分布的重要依据。比如,可以在求得古年径流量 S 和古年输沙量 W(用类比法)以后,据关系式 S/W≥0.24是否成立来判断古河流是否能形成三角洲;可以在求得平滩流量 Q_n 后,据关系式 L_M=50Q_n~(0.5)求得河湾跨度(图1),以便较准确地寻找更多的河道砂岩油气藏。更重要的是将古河流及古湖盆的水文参数结合起来,进行电算模拟,有可能对较大范围内、甚至对全盆地的 Furukawa hydrological parameters, is an important basis for predicting the distribution of terrigenous clastic rock reservoirs in the sedimentary basin. For example, after determining the ancient runoff S and ancient sediment transport W (using analogy), according to the relationship S / W ≥ 0.24 is established to determine whether the ancient river flow can form a delta; can be obtained in the flat beach After the flow rate Q_n, the span of the river bay is obtained according to the relationship L_M = 50Q_n ~ (0.5) (Fig.1), so as to find more channel sandstone reservoirs more accurately. More importantly, the hydrological parameters of the ancient rivers and the ancient lakes are combined to carry out the computational simulation. It is possible to analyze the hydrological parameters in a large area or even in the whole basin