Abstract:

Due to the significant influence on fluid flow shown by larger scale connectivity,when modeling reservoir heterogeneity,important heterogeneity and larger scale structures should be modeled first,then the filling of petrophysical properties.This procedure tends to guarantee the more reasonable geological models.Such modeling process can be considered facies controlled modeling.According to the better relevance between lithofacies and petrophysical properties in Wen 5 block,Tuna basin,this paper is aimed at building lithofacies model on small layer level.By combining geological features with logging data in the area of interest,discriminant equations of four types of lithofaices are established based on the division of lithofacies.35 wells are processed by the equations.Then lithofacies distribution models in three layers are constructed by employing kriging module in MODRES,an integrated reservoir modeling software.Distribution areas of each lithofaices are analyzed.As the further applications of lithofacies,more exact permeability models are built based on the lithofacies models-a kind of reservoir structures.The favorable permeable areas are pointed out.

Key words: lithofacies, facies controlled modeling, MODRES, discriminant analysis, Tuna Basin, Wen 5 block

摘要：

在模拟储层非均质性时,由于大规模的连通性对流体运动有重大影响,因此重要的非均质性和大规模的结构应先模拟,然后模拟小尺度的非均质特征,这样可为得到更合理的地质模型提供保障.这种模拟过程通常就是我们所称的相控储层模拟.就温五区块岩石相与储层物性之间具有较好的相关性这一特点,结合工区地质特征、测井曲线特征,在划分出四类岩石相的基础上,建立了各类岩石相的判别模型,并解释出了35口并的岩石相,然后利用MODRES模拟程序中的克里格模块建立了小层岩石相分布模型,分析了各类相带的分布特征.作为岩石相模型的进一步应用,还在岩石相这一储层结构模型的基础上,建立了更加精确的渗透率模型,并指出了有利的储集区.

关键词: 岩石相, 相控模拟, MODRES, 判别分析, 吐哈盆地, 温五区块