应用序贯指示模拟方法模拟沉积微相

沉积微相的正确划分对储层非均质性研究以及储层参数场的分布有重要的指导意义。在以往的沉积微相研究中,微相边界的确定大多是由地质人员根据专家知识推断,具有主观性,难以适应高精度地质模型的要求。引入地质统计学中的序贯指示模拟方法,对沉积微相的平面分布特征进行随机模拟。通过在X油田S2-2小层的沉积微相研究中的应用,可产生多个反映现有微相平面分布的等概率模型,克服了因资料不全等原因而引起的模型的不确定性,结合地质人员的经验,可确定出满意的模型,应用效果良好。

APPLICATION OF SEQUENTIAL INDICATOR SIMULATION METHOD TO DELINEATING SEDIMENTARY MICROFACIES

Correctly delineating sedimentary microfacies provides guidance to the study of reservoir heterogeneity and distribution of reservoir parameters. However, traditionally the determination of the boundary of sedimentary microfacies largely relies on the researchers' experiences and thus tends to be subjective. In this work, the Sequential Indicator Simulation Method is used to solve the problem. With the method, equi- probabilistic models of distribution of microfacies in the plan can be obtained. When integrated with the experience of geological researchers, this approach not only demonstrates the variation of microfacies, but also minimizes the uncertainty of models due to the lack of data. Application of the method to the S2-2 layer in X oil field has shown satisfactory results.