薄互层油藏模型井间地震弹性波方程正演模拟研究  

Study on forward simulation of cross-hole seismic elastic wave equation for model of thin and alternating bed reservoir.

作　　者：裴正林[1,2] 夏吉庄[3] 王慧[3] 

机构地区：[1]中国石油大学CNPC物探重点实验室,北京市海淀区100083 [2]北京北方林泰石油科技有限公司,北京100192 [3]中国石化胜利油田分公司物探研究院,山东东营257022

出　　处：《石油地球物理勘探》2009年第1期112-118,共7页Oil Geophysical Prospecting

摘　　要：本文采用非均匀介质中弹性波方程交错网格高阶有限差分法进行数值模拟,并通过对正演过程中每一时刻的弹性波场求散度和旋度实现了弹性波场分离。其散度场以纵波场为主,旋度场以转换波和横波为主;采用模型多尺度网格化、参数化技术,建立了薄互层油藏2D井间地震弹性介质模型。数值模拟试验表明,弹性波方程数值模拟能够更加真实地模拟井间地震的波场。正演模型与偏移成像结果剖面吻合很好。The paper adopted staggering-grid high-order finite-difference algorithm of elastic wave equation in non-homogeneous medium to carry out numeric simulation, and the elastic wavefield separation is finished by solving divergence and rotation for elastic wavefield at each moment of forward process, in which the divergence field mainly is P-wave and rotation field is mainly converted wave and S-wave. The 2D cross-hole seismic elastic medium model of thin and alternating bed reservoir was created by using multi-scale gridiron and parametrization technique of model. The experiment of numeric simulation showed that the numeric simulation of elastic wave equation is able to truly simulate the cross-hole seismic wavefield, and the forward simulation coincides better with migration imaging result.

关 键 词：正演模拟 薄互层 弹性波方程 井间地震模型 波场 

分 类 号：P631.443[天文地球—地质矿产勘探] O347.41[天文地球—地质学]