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
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.
廖建平, 王华忠, 刘和秀, 杨天春, 王齐仁, 刘新华, 马在田. 精确的频率空间域黏声波有限差分数值模拟[J]. 物探与化探, 2011, 35(4): 541-545.
LIAO Jian-ping, WANG Hua-zhong, LIU He-xiu, YANG Tian-chun, WANG Qi-ren, LIU Xin-hua, MA Zai-tian. ACCURATE VISCO-ACOUSTIC WAVE FINITE DIFFERENCE NUMERICAL SIMULATION IN FREQUENCY SPACE DOMAIN. Geophysical and Geochemical Exploration, 2011, 35(4): 541-545.
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