基于地震解释砂体单元的储层数字地质建模  

RESERVOIR DIGITAL GEOMODEL BASED ON SANDBODY UNIT TRACED THROUGH SEISMIC INTERPRETATION

作　　者：孙立春[1] 高博禹[1] 

机构地区：[1]中海石油北京研究中心,101149

出　　处：《天然气工业》2008年第8期43-45,共3页Natural Gas Industry

摘　　要：根据地层层序发育特点,在等时地层格架内创建了构造模型,并以地震解释的单个砂体为对象,确定性地创建对应于每个砂体单元的砂体结构模型;通过建立单砂体单元的层速度场,提取每个单砂体单元地震属性体,并分别应用其层速度场进行时深转换;在砂体结构模型基础之上,应用协模拟技术,雕刻砂体内部的属性分布特征。研究表明:应用该思路建立储层数字地质模型,可以充分反映每个地震解释的砂体构型;为复杂油气田单砂体单元的时深转换提供了解决方法;应用进行时深转换的地震属性体和井点参数,采用随机模拟方法进行储层属性模拟,可以充分地反映储层内部非均质性,雕刻隔夹层的分布。该建模方法与思路能较好地生成等时地层格架下的地震解释砂体单元模型,并描述其内部的非均质程度。According to sequence stratigraphy's development character, the structural model is established within isochronal formation frame and sandbody structural model corresponding to each unit, taking a single sandbody traced by seismic interpretation as an objective, is also built up definitely. By building horizon velocity field of single sandbody unit, seismic attributes of single sandbody is extracted and applied into its horizon velocity field to make time depth conversion respectively.Attribution distribution within sandbody is reflected by using co-simulation technology based on the structural model of single sandbody. It is shown by research that stochastic model built in this way mentioned above can fully reflect sandbody structure traced by seismic interpretation and provide solution to time depth conversion of single body in complicated oil and gas fields; that heterogeneity within reservoir, barrier distribution and interbed distribution can be also fully reflected by adopting seismic attribution after time depth conversion and well parameters and simulating reservoir attribution through stochastic modeling method. This modeling method and its way can form better sandbody unit models based on seismic interpretation within isochronal formation frame and describe heterogeneity within it.

关 键 词：地震解释 砂岩体 储集层 非均质 地质模型 数字化 

分 类 号：P618.13[天文地球—矿床学]