【摘要】 在等效Thomsen各向异性参数的P-SV波反射系数近似公式基础上研究了反射系数的多种AVO(振幅随炮检距变化)属性特征,针对不同的属性特征构建了多属性AVO交绘图;并利用反射系数公式对三类含气砂岩AVO的特征进行分析。结果表明P-SV波反射系数公式可以有效的区分第三类含气砂岩;岩石的孔隙度、流体饱和度等信息是影响地震波AVO的重要因素。利用Gas-smann方程进行了对上层为HTI介质,下层为孔隙储层的介质模型进行了流体替换计算,分析了孔隙度、含气饱和度和各向异性参数变化对地层AVO的影响。更多还原

【Abstract】 Based on the new approximation reflection coefficient in HTI media,the attributes of AVO and the characteristics of AVO background trends crossplotting are described by the Thomsen anisotropic parameters.The effect of new reflection coefficient to three kind of gas sand AVO model is discussed,and it is visible tools to identify the AVO Ⅲ gas sand.Futermore,the effects of porosity,saturation and Thomsen anisotropic parameters to P-SV wave reflection coefficients in HTI/Isotropic pore reservoir model are studied.更多还原