两种改进的多点地质统计学方法对比研究

摘要

Through the comparison of two modified multipoint geostatistics (MPS )methods,namely,the skeleton -based multiple point geostatistics (SMPS )modeling method and the random walk -based multiple -point geostatistics (RMPS)modeling method,the advantage and disadvantage of the two methods and their application scope were identified. Research results indicate that the common point of the two methods is to generate fluvial mainstream with the object-based modeling method and restrain multiple point events by using data of the fluvial mainstream.The differences between two methods are the generating mode of the fluvial mainstream and the application range of the two methods.The SMPS modeling method generates the fluvial mainstream by adopting the search-window method and is suitable for well areas having lower well spacing density.However,the RMPS modeling method creates the fluvial mainstream through the random walk process and is suitable for well areas having higher well spacing density.On this basis,we put forward that the multi-ple point geostatistcs method can be improved in terms of integrated geological knowledge and algorithm itself.%通过比较两种改进的多点地质统计学方法-即基于储层骨架的多点地质统计学建模方法和基于随机游走过程的多点地质统计学建模方法，明确了两种方法的优缺点及适应范围。研究结果表明，两种方法的共同点体现在都是利用基于目标方法生成河道主流线，进而利用河道主流线数据约束多点数据事件进行模拟。两种方法的不同点主要体现在主流线的生成方式及适应范围上。其中，基于储层骨架的多点地质统计学方法采用搜索窗的思想生成河道主流线，对井网密度较小的井区具有相对优势；而基于随机游走过程的多点地质统计学方法采用随机游走过程生成河道主流线，适合于井网密度较大的井区。在此基础上，提出多点地质统计学方法的改进应从综合地质认识和算法本身着手。