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流体弹性阻抗反演是一种能将反映储层流体效应的敏感参数从弹性波阻抗数据体中直接求取出来的地震反演方法.该方法不仅具有抗噪性、直观性强的特点,而且有效地避免了间接提取流体因子存在的累积误差问题.在双相介质理论和岩石物理实验指导下对岩石固液效应解耦,构建出凸显孔隙流体效应的流体等效体积模量参数,并推导了其流体弹性波阻抗方程,最后综合利用地质、测井和地震资料,完成对埕岛地区下第三系不整合圈闭储层的含流体检测,进一步明确了该地区含油气储层物性横向变化的认识,具有良好的实际应用效果.
Fluid elastic impedance inversion is a seismic inversion method that can directly extract the sensitive parameters that reflect the reservoir fluid effect from the elastic wave impedance data body.This method not only has the characteristics of anti-noise and strong visualization, but also Which effectively avoids the accumulated error of indirect extraction of fluid factors.Under the guidance of two-phase medium theory and rock physics experiment, the solid-liquid effect of rock is decoupled and the equivalent bulk modulus parameter of pore fluid is established and deduced Finally, the fluid elastic wave impedance equation is established. Finally, the geologic, log and seismic data are comprehensively used to complete the fluid-containing fluid detection of the unconformity trapped in the Lower Jurassic in Chengdao area, and the physical properties of the reservoirs in the area are further clarified Change of understanding, with good practical application results.