含油气地层地震响应特征分析

（中国石油大学，北京100083）

Analysis of seismic response characteristics in hydrocarbon formation

应用地震资料进行油气检测的基础是储层孔隙中流体性质的变化足以影响地震反射特征。定量分析含不同流体地层的地震响应特征，可以有效地提高地震储层预测的可靠性。依据应力与体积模量之间的关系，简述了不同流体性质下地层弹性参数的定量计算方法，并对实验室和实际计算结果进行了分析。探讨了不同性质的流体对反射系数和波阻抗的影响。采用正演模拟方法获得了含不同流体地层的地震合成记录，并在此基础上进行了地震属性分析。

When the changes of fluid properties is enough to impact the seismic reflection characteristics, the seismic data can be applied for hydrocarbon detection. Through quantitatively analyzing the seismic response characteristics in different fluid-bearing formations, the reliability of seismic reservoir prediction can be effectively improved. In terms of the relation of stress and bulk modulus, the quantitative computation method for elastic parameters of the formations with different fluid properties was briefly described and the computation results from both laboratory and actual application was analyzed. Meanwhile, the impact of fluid with different properties on reflectivity and wave impedance was discussed. The forward modeling was applied to obtain the seismic synthetic seismogram of formations with different fluids and seismic attribute analysis was carried out on this basis.