【摘要】 在油气勘探开发过程中,裂缝性油气藏所占的比例越来越大。裂缝性地层表现出很强的各向异性,勘探难度很大。而AVO技术从早先所认识到的一种现象已发展成一种完善的地球物理勘探技术,被广泛应用到油气勘探领域。当地层出现一定方位的裂缝时,地层的弹性参数会表现出方向性差异,这种差异能被AVO方法有效地检测。理论上讲,裂缝对地震属性参数的影响在垂直裂缝走向的方向上表现为最强,在水平裂缝走向的方向上表现为最弱,对AVO属性参数的影响也是如此。更多还原

【Abstract】 The proportion of fractured reservoir is getting greater and greater during petroleum exploration and development. Fractured formations show a very strong anisotropy,causing great difficulty in exploration. Amplitude versus offset (AVO) technique,which has been developed into a perfect geophysical exploration technique from an early-recognized phenomenon,is widely used for oil and gas exploration. When the fractures with a certain azimuthal angle occur in formation,the elastic parameters of strata show a directional difference,which can be effectively detected through the AVO analysis. Theoretically,the influence of fracture on seismic attribute parameter is the strongest in the direction of vertical fractures and the influence is the weakest in the direction of horizontal fractures. The impact of fracture on AVO attribute parameter is also same.更多还原