摘要
根据Schoenberg的含裂隙介质的线性滑移模型理论,建立了1个两层模型,模型的上层为各向同性均匀介质,下层为含垂直定向排列裂缝介质(HTI介质)。然后在不同裂缝密度下,针对干裂缝和饱含流体的裂缝两种情况,分别对模型分界面上的地震波方位AVO进行了数值模拟,研究了裂缝密度、裂缝方位、裂缝填充物对AVO的影响。结果表明,对上覆各向同性介质的含垂直裂隙介质界面AVO结果影响最大的是岩性,其次是裂缝流体,然后是裂缝方位,裂缝密度的影响最小。研究结果为利用振幅变化信息预测裂缝提供了依据。
According to Schoenberg's linear-slip model theory of fractured media,a two-layer model was built,the upper layer is isotropic homogeneous media,and the under layer is the HTI media with vertically aligned fracture.Then,with different fracture density,aiming at dry fracture and fluid-saturated fracture,the azimuthal AVO on model interface was simulated,and searching the impact of fracture density,fracture azimuth and fracture fillings on AVO.The result shows that for this model the biggest impact on AVO at interface is lithology,fluid is next,fracture azimuth is smaller,and the smallest one is fracture density.The research result provides basis for the fracture prediction by AVO information.
出处
《石油物探》
EI
CSCD
北大核心
2010年第3期232-239,共8页
Geophysical Prospecting For Petroleum
基金
国家重大科技专项(2008ZX05014-001)资助
