In this paper the author studies the theory and method of refraction tomography at uppermost mantle . the images of p - and s - wave velocity lateral variation are rebuilded at uppermost mantle beneath china continent , and anisotropy of p - wave velocities are obtained on the basis of pn and sn travel time data in china and adjacent area by tomography technique 本文在详细分析研究了上地幔顶部折射波层析成像技术的理论和方法及其发展历程的基础上,搜集了中国大陆及邻区的pn和sn到时资料,利用层析成像技术,重建了中国大陆上地幔顶部的p波和s波速度横向变化图像,并反演出p波波速的各向异性分布。
In order to study the influential factors on seismic attribute , the authors use the rock modeling software to simulate the changes of mineral constituent , porosity , fluid property and saturation of rocks and further study the changes of the seismic attribute basing on the velocity of s - wave , the velocity of p - wave and various elastic modeling quantities of the rocks by means of forward modeling 摘要为了研究影响地震属性的因素、应用岩石建模软件模拟岩石的矿物组分、孔隙度、所含流体性质以及饱和度等变化,对其纵横波速度、各种弹性模量的变化情况通过正演的手段得到了解。
For processing of 3d and 3c seismic data , the reflected p - waves can be processed with the conventional methods , while the reflected converted waves can not be processed with the conventional p - wave processing methods , because their travel paths are asymmetrical , their common midpoint gathers are no longer common reflection point gathers , and their time - distance equation is non hyperbolic 在三维三分量地震勘探资料处理中,对于反射纵波资料可以采用常规方法进行处理;而对于反射转换波资料,由于其传播路径的非对称性,转换波共中心道集不再是共反射点道集,转换波时距方程也不是双曲方程,因此不能采用常规纵波处理方法来处理转换波资料。
Directed by wave theory of fractured media , the elastic parameters of eda medium are determined in the light of hudson - fractured theory , and christoffel equation gives the formula of the phase velocity of p - wave by which , effects of velocity on behalf of kinetic characteristic and reflection coefficient on behalf of dynamical characteristic form fractured density and azimuty is discussed 本文以裂隙介质的波动理论作指导,根据hudson裂隙理论,求出eda介质的弹性参数。在此基础上,应用christoffel方程求出的地震纵波相速度表达式,探讨了裂缝密度和裂隙方位对代表波场运动学特征的纵波速度和代表波场动力学特征的反射系数的影响。