基于流体替换的地震波场数值模拟与分析技术
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摘要
提出了一套综合地质模型的精细建模方法、弹性波动方程叠前正演方法、叠前深度偏移方法、储层流体替换方法的地震波场数值模拟与分析技术,该技术首先采用多次循环计算与分析的地质模型建模方法,建立目标地震剖面准确的地质模型和参数模型;然后采用流体替换方法计算储层在各种流体饱和状态下的等效参数;并采用新的参数模型进行地震波场数值模拟,获得各种流体饱和状态下储层的地震反射波场特征。渤海某地区应用实例的结果表明,该技术不仅可以获得准确的油藏模型;而且可以有效地获得油、水层的地震响应特征,有效地指导后续的储层与油水识别,具有重要的理论和实际应用价值。
A set of comprehensive building geological model method and the elastic wave equation pre-stack forward method,pre-stack depth migration,seismic wave field numerical simulation and analysis of reservoir fluid substitution method are presented. Repeatedly cycle calculation and analysis of building geological model method are used to establish the accurate geological model and the parameters of the model of the target section. Fluid replacement method is used to calculate the equivalent parameters of fluid which is saturated in a variety of fluid,and the new parameters is used to calculate the seismic wave field to get the characteristics of reflect seismic which is saturated in a variety of fluid. The application example of in an area of Bohai shows that this technology can not only obtain accurate reservoir model,and can effectively obtain the seismic response characteristics of the oil layer,the water layer and effectively guide the subsequent identification of reservoir with water,it has important theoretical and practical value.
引文
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