河道模型的改进及扩展应用

IMPROVEMENT AND EXTENDED APPLICATION OF FLUVIAL MODEL

提出了一种新的改进型储层沉积相建模的河道模型 ,该模型扩展了对河流分汊、交汇等现象的描述和模拟 ,根据改进的河道模型的特点和河道的地质地理特征 ,利用一种新的河道模型条件化算法 ,并将河道模型与砂岩概率模型相结合 ,实现了协同布尔模拟。实例应用表明 ,改进的河道模型包含了更为全面的地质信息 ,其应用更为广泛 ;新的条件化方法是从河道的上游、下游和支流 3个角度进行模拟计算 ,对河流沉积的描述更为准确 ,算法简洁 ,计算速度明显提高。通过协同布尔模拟可以使储层沉积相建模有效地结合多方面的次级信息 ,降低了储层模型的不确定性。

A new fluvial model characterized with description and simulation functions for branching and crossing streams was presented. A new fast conditioning algorithm was adopted according to geological and geographic characteristics of fluvial channel and the property of the new model. By combining the new model with the probabilistic model, co-Boolean simulation was realized. An applied case shows that the new fluvial model is restricted with more geological knowledge and can be adopted widely. The conditioning algorithm can realize computations of upstream, downstream and branch of flurial channel, respectively. The description for fluvial deposition is more precise and fast. The co-Boolean simulation can be integrated with more secondary information flexibly to realize reservoir facies modeling and reduce the uncertainty of reservoir model.