综合随机游走过程与多点统计的河流相建模新方法

Modeling on Integrating Random Walk Process and Multiple-point Geostatistics to Fluvial Reservoirs

多点统计学由于其算法的限制,不能很好再现连续河道形态,其关键是在抽样过程中随机性较强,导致河道连续性中断。提出了将随机游走过程应用于多点统计建模的新方法。通过随机游走产生河道主流线,并利用河道主流线约束多点统计预测,克服多点统计随机抽样导致的河道不连续性问题。从实际建模效果看,基于随机游走过程与多点统计的耦合建模方法较好地再现了河道连续性;抽稀检验验证了耦合建模方法的稳健性;表明所设计的新方法可以应用于实际储层建模。

The multiple-point geostatistics could not represent the continuous shape of the channel due to the limitation of its algorithm with random draw of the simulated value.A new method was proposed,which integrated the random walk process with multiple-point geostatistics.First the random walk process produced main streamline of cannel,by which the main streamline was constrained by the multiple-point geostatistics,the method was used to solve the problem of non-continuities of channel.Based on the actual model,the method based on random walk process and the multiple-point geostatistics can well reproduce the continuity of channel.The results show the new method is validate,it proves that the new method is robust and can be used for reservoir modeling.