Abstract: Lithofacies vary significantly in alluvial fan, and this results in serious reservoir heterogeneity. Geologic models that are based on sparse wells or core data are potentially inaccurate descriptions of the reservoir. While incorporating seismic data and using geostatistical method, the spatial variability of reservoir parameters can be better characterized. Arial variogram models of any position and direction are available for accurate quantitative geologic reservoir models. This technique integrates the vertical high resolution data of well and lateral high resolution data of seismic. The inversion section, such as SEISLOG, is used as soft constraining data here to provide stratigraphic framework and spatial varying characteristics of reservoir parameters while establishing determining reservoir models,and seismic records are regarded as hard data in stochastic simulation to asses the reliability of those final realizations.

Key words: alluvial fan, reservoir models, well logging, seismic data

摘要： 冲积扇体系岩相空间上复杂多变,储层非均质性严重。单凭测井、岩心等资料无法达到对储层的精确描述。运用地质统计学方法,综合使用地震数据,可以更精确地反映储层参数的空间变化规律,求取任意位置、任意方向的空间变异函数,从而建立更精确的定量储层地质模型。该方法综合利用了井资料的高垂向分辨率及地震资料的高横向分辨率,地震反演参数剖面在建立确定性模型时被用作软约束数据来提取地层格架信息及储层参数的空间变化规律,原始地震记录作为随机模拟部分的硬数据,以优化模型及检验其可信度。

关键词: 冲积扇, 储层地质模型, 测井数据, 地震数据