储层地质建模策略及其技术方法应用  

Strategy of Reservoir Geological Modeling and Application of Technical Method

作　　者：李毓[1] 杨长青[2] 

机构地区：[1]中石化西南油气分公司博士后科研工作站,四川成都610081 [2]成都理工大学博士后流动站,四川成都610059

出　　处：《石油天然气学报》2009年第3期30-35,12,共6页Journal of Oil and Gas Technology

基　　金：国家科技重大专项课题(2008XZ05002-004-001)

摘　　要：储层的三维定量地质模型可以反映储层地质属性空间分布特征和变化规律,为油藏开发提供地质依据。针对西部某油藏实际地质情况,提出地质建模的具体技术思路,在分析层次性建模策略在地质建模中的应用基础上,通过变差函数等数学工具,求取能够反映地质属性变量空间非均质特性和用于控制后期属性参数建模的变程参数;通过对比分析采用不同的微相划分和归并方案后的相控建模效果,确定出既能控制和影响砂体发育又能最大程度体现相控建模效果的相划分原则;通过协克里金(Co-kriging)等确定性建模方法和序贯高斯模拟(SGS)等随机建模方法相结合,最终得到该油藏的构造模型、地层格架模型、沉积相模型、储层参数模型;针对不确定性的多个随机建模实现提出地质概念模型对比、统计特征对比、抽稀检验和地质储量概率分布等模型验证方法,证实研究中所采用的地质建模方法和技术思路的准确性以及所建地质模型具有的预测性。3D quantitative geological models could indicate the spatial distribution characteristics and change laws of geological properties and offer the geological references for reservoir exploitation. Aimed to actual geological states in the west of China, some technical thoughts about geological modeling were put forward. On the basis of analyzing the application effect of the hierarchical modeling strategy, the variogram range parameters of the sedimentary micro-facies and reservoir properties, which could present the spatial heterogeneity of geological variables and could be used in the subsequent course of controlling the properties modeling, are calculated by the mathematic tool of variation function analysis. And the reasonable rules of classifying and incorporating micro-facies are determined by contrasting and analyzing the effects of different modeling methods which could influence the growing of sand body and embody the effects from the facies-controlled modeling. Finally the models including structures, architecture of sandbody, sedimentary facies and reservoir properties are established by combining the determinate modeling methods such as Co-kriging with stochastic modeling methods such as Sequential Gaussian Simulation(SGS). Aimed to the indeterminate models from stochastical modeling, the methods are presented to validate the geological models including comparing conceptual geological distribution and statistical characteristics, testing rarefied data and analyzing the distribution law of the probable reserves. And then, the accuracy of the geological modeling technique and predictability of the geological models are demonstrated.

关 键 词：地质建模 层次性策略 变程 相划分原则 模型验证 

分 类 号：P618.13[天文地球—矿床学]