摘要
随着裂缝性储集层的地位越来越重要 ,黏弹性各向异性介质中地震波传播理论的研究也越来越受到重视 .在弱黏滞性条件下 ,针对标准线性黏弹性体模型 ,采用时间增量法 ,在每一个时间步长确定黏弹性变形及载荷 ,并在计算下一个时间步长的黏弹性变形时把它加载进去 ,建立类似于解弹性问题的黏弹性方位各向异性介质波动方程的有限元递推公式 .数值模拟给出了黏弹性波在地球介质中的波场传播特征 .
With the importance of the fractured strata in the oil exploration, researchers have paid more attention to the wave propagation in viscoelastic and anisotropic media. Provided the rocks are weakly viscoelastic, the viscoelastic problems can be solved as a series of elastic problems by using the time increment method. At each step we determine the viscoelastic deformations and the corresponding viscoelastic loads, which are added to the load vectors for the next step. On this basis, the finite-element recursive formulae of viscoelastic and azimuthally anisotropic media are established. The numerical simulations show the characteristics of wavefields in the viscoelastic and azimuthally anisotropic media.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第8期2010-2014,共5页
Acta Physica Sinica
基金
中国石油天然气集团公司石油科技中青年创新基金 (批准号:2001CX-10)
中国石油天然气集团公司物探重点实验室开发基金 (批准号:GPKL0107)和中国石油天然气集团公司"十五"科技攻关项目 (批准号:2-1-1)联合资助的课题 .~~
