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Study on stochastic modeling of architectural element and remaining oil distribution in fluvial facies reservoir
Author(s): 
Pages: 81-85
Year: Issue:  4
Journal: ACTA PETROLEI SINICA

Keyword:  胜坨油田河流相结构单元空间分布模型剩余油分布随机模拟;
Abstract: 以胜坨油田二区沙二段3 4层为例,对河流相建筑结构空间分布进行了随机建模,研究了剩余油分布规律.对7口取心井进行了观察和分析,利用密井网条件下组合测井资料,综合考虑岩性、沉积特征、电性特征等因素,共划分出9种岩相类型、7级界面和7种结构单元.应用优选序贯指示模拟方法,建立了结构单元三维空间分布模型.检验结果表明,该模型具有较高的准确性.用该模型确定了结构单元,河道充填沉积和心滩为63.1%,天然堤为10.6%,决口扇为8.9%,洪泛平原细粒为8.1%,河道滞留沉积和落淤层分别为4.9%和4.4%.对各个结构单元和多个结构单元组合进行分析及与剩余油饱和度模型进行叠合分析发现,4个井区的剩余油饱和度均在50%以上,具有较大的增产潜力.
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