【摘要】 从孔隙介质理论出发,通过Gassmann理论分析,综合考虑岩石孔隙度、泥质含量、流体类型、应力、温度等多种因素的影响,建立了QHD326油田的地震波速度模型。在此基础上,研究了孔隙及孔隙流体对地震反射特征的影响。根据QHD326油田的地层条件以及不同流体相态下岩石的纵、横波速度和密度等岩心测试数据,通过对叠前正演结果和实际地震资料的分析,总结了岩石物理参数与地球物理特征之间的关系。更多还原

【Abstract】 Based on the porous media theory,through the analysis of Gassmann theory,seismic wave velocity model of QHD326 oilfield was established by taking various factors into consideration,such as rock porosity,shale content,fluid types,stress and tempera- ture,etc.On this basis,the effect of porosity and pore-fluid on seismic reflection was studied.Comprehensively using the core petrophysical testing data of P-wave velocity,S-wave velocity and density in different fluid phases under the strata conditions,the re- lationship between petrophysical parameters and geophysical fea- ture was summarized for QHD326 oilfield through pre-stack for- ward modeling and actual data analysis.A reliable foundation for further seismic inversion and reservoir characterization was provid- ed through the research.更多还原