布尔方法储层模拟的改进及应用

Improvement of framework models established with Boolean simulation

利用传统的布尔方法建立的储层砂体骨架模型存在不足之处 ,即模拟结果给出的砂体连通性比实际情况好得多。产生这种情况的原因在于传统布尔方法是利用均匀分布的随机函数产生目标对象的中心点坐标 ,它没有考虑沉积过程中先沉积的砂体对后沉积的砂体有重要的控制作用 ,从而造成模拟结果中砂体的连通性过好、泥岩的厚度过大。为此 ,提出了一种简单的方法来解决这一问题 ,其基本思想是优先在未填充目标对象的地方产生新目标对象的中心点。给出了在二维情况下该方法的具体实现步骤以及在新疆油田建立储层砂体骨架剖面模型的实例。在研究中 ,对改进的布尔方法和传统的布尔方法的模拟结果进行了对比。研究结果表明 ,利用改进的布尔方法建立的储层砂体骨架模型更接近真实情况。

The models for sand body framework in reservoirs established using traditional Boolean method has some shortcomings.The simulation results of connectiveness of sand bodies were better than the real status,because the entirely stochastic random function was applied to generate the central point of every sand body in the traditional Boolean method,without consideration of the important control of previously deposited sand bodies over the latterly deposited subsequent sand bodies during the deposition.A simple method,the improved Boolean method,is presented here to solve this problem.The basic principle of the improved method is to generate the central point of the new geological object firstly at the location there has not filled the geological objects.The implement steps of this method in the case of two dimensions and an application case in the Xinjiang Oil Field were introduced.The simulation results obtained respectively from the improved Boolean Method and the traditional Boolean Method were compared.It is indicated that the improved Boolean Method can get more realistic simulation result.