摘要
针对不同固结程度的砂岩,从Boit经典理论出发,基于White斑块饱和模型,应用数值模拟研究了渗透率对地震波衰减和速度频散的影响,分析了地震波垂直入射时渗透率对储层界面反射系数和相位的影响。结果表明:对于砂岩储层,渗透率对地震波衰减和速度频散有明显影响,尤其是中等压实砂岩储层和未固结砂岩储层,对渗透率变化非常敏感;渗透率对砂岩储层尤其中等压实砂岩储层界面反射系数和相位有明显影响,甚至会产生相位极性反转。
This paper presents sandstone reservoir permeability characteristics analysis based on White model with patchy saturation.According Biot classical theory,we analyze permeability influence on seismic wave attenuation,velocity dispersion,normal-incident reflection coefficient,and phase for different consolidated sand reservoirs.It is found that permeability has strong influence on seismic wave attenuation and velocity dispersion for sand reservoirs,especially in medium consolidated sandstone reservoirs and unconsolidated sandstone reservoirs.Permeability has also strong influence on reflection coefficient and phase,especially in medium consolidated sandstone reservoirs,which might lead to phase polarity reversal.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2015年第4期723-729,6,共7页
Oil Geophysical Prospecting
基金
国家自然科学基金项目(41174115)
国家科技重大专项(2011ZX05025-003)联合资助
关键词
砂岩储层
渗透率
速度频散
地震波衰减
波动方程正演
sandstone reservoir,permeability,velocity dispersion,seismic wave attenuation,wave equation forward modeling
