|
|
|
| ACCURATE VISCO-ACOUSTIC WAVE FINITE DIFFERENCE NUMERICAL SIMULATION IN FREQUENCY SPACE DOMAIN |
| LIAO Jian-ping1,3, WANG Hua-zhong2, LIU He-xiu1, YANG Tian-chun1, WANG Qi-ren1, LIU Xin-hua1, MA Zai-tian2 |
1. Hunan College Key Laboratory of the Construction Process,Quality and Safety of Civil Engineering,Xiangtan 411201,China;
2. State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092, China;
3. School of Geosciences and Info-Physics,Central South University,Changsha 410083, China |
|
|
|
|
Abstract Modeling absorption and attenuation in time-space domain requiring a lot of computer memory with low computational efficiency, it is hard to simulate attenuation in time-space domain. We can use an empirical physical or mathematical formulation to simulate absorption and attenuation in frequency-space domain through introducing complex velocity and Q values. We can easily describe attenuation with high efficiency in frequency-space domain using nested dissection and Kjartansson's model. Numerical experiments demonstrate that absorption and attenuation affects all the frequency components of the wavefield and affects a greater impact on the higher frequency components, so it decreases the seismic record's resolution. It is very easy to simulate absorption and attenuation effects in frequency-space domain, providing a good foundation for visco-acoustic wave full waveform inversion on real data.
|
|
Received: 19 July 2010
Published: 15 August 2011
|
|
|
|
|
|
|
|
|
