序贯高斯模拟方法在尼日利亚KK油田中的应用

Application of sequential Guassian simulation in the KK oilfield of Nigeria

对序贯高斯模拟方法进行了研究并将其应用到尼日利亚KK油田OML66区块的物性参数建模中(主要介绍的是孔隙度模型)。与普通克里金法建立的模型进行对比的结果表明,普通克里金法具有平滑效应,忽略了井间的细微变化,因此不能很好地反映储层的非均质性和孔隙特征;而序贯高斯模拟方法不仅可以克服这种平滑效应,而且能够很好地反映参数的细微变化。序贯高斯模拟方法能更好地反映储层的非均质性和展现孔隙度在空间的分布规律,因此,更适合用于储层非均质性和孔隙特征的研究。

This paper is mainly to study the sequential Gaussian simulation method and its application to the physical parameters model of OML 66 block in KK oil field,Nigeria.To the porosity model as an example,and the results are compared with ordinary Kriging.The results showing that ordinary Kriging has a smoothing effect and ignored the subtle differences between Wells,therefore it is not suitable to describe the reservoir heterogeneity and the pore character.While the sequential Gaussian simulation is a better method to characterize the reservoir heterogeneity and the pore character.It can overcome this smoothing effect,and to describe the subtle differences of the parameters very well.Thus,the sequential Gaussian simulation method can describe the reservoir heterogeneity and show the distribution of porosity in the space.