应用截断高斯随机模拟法研究沉积微相

A new approach for stochastic simulation of sedimentary microfacies.

沉积微相在一定程度上控制着储集层参数场。确定沉积微相的边界和分布是准确预测储集层参数的基础。以往这一工作依赖人为的推断，模糊性和不确定性较大。引入地质统计学中的截断高斯随机模拟方法，对沉积微相的平面分布特征进行随机模拟。选用等概率模型，在非均质性极其严重的Ｈ油田沙三中段９砂组５小层４种沉积微相的分布研究中应用该方法，结果表明，该方法能克服因资料不全而引起的模型的不确定性，优于传统手工方法，应用效果良好。

It is difficult to determine and classify the boundary of sedimentary microfacies in the study of reservoir sedimentation. This paper applies Truncated Gaussian Simulation to model the spatial distribution of sedimentary microfacies of Es 3 in H oil field whose reservoir heterogeneity is highly serious. Results show that this approach not only demonstrates the variation of microfacies, but also overcomes the uncertainty of the models due to the lack of data. It lays a solid geological foundation for forecasting reservoir parameters in the further study.