Xinjiang Petroleum Geology ›› 2011, Vol. 32 ›› Issue (6): 650-652.

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2-D Acoustic Wave Numerical Simulation and It's Application in Frequency Space Domain

LIAO Jian-ping1a,1b, WANG Hua-zhong2, YANG Tian-chun1a, WANG Qi-ren1a, LIU Xin-hua1a   

  1. 1. Hunan University of Science and Technology, a. Geology Department, School of Civil Engineering, b. Hunan Province Key Laboratory of Coal Resource Clean Utilization and Mine Environment Protection , Xiangtan, Hunan 411201,China;
    2. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
  • Received:2011-01-10 Online:2011-12-01 Published:2020-08-20

Abstract: Adopting the nested-dissection method to store the acoustic wave equations for finite difference dispersion frequency space domain can shape large scale sparse coefficient matrix, which can decrease the requirement of computer capacity and reduce the computing amount greatly. Using the fast computational procedure of multi-shot acoustic wave simulation in 2-D frequency space domain can also increase the computing velocity of numerical simulation. In this paper, the hypocenter singularity problem from the frequency domain forward modeling is analyzed and discussed in detail, and corresponding solved measures are proposed, clarifying the principle for correct selection of parameters during such a numerical simulation. The results of numerical simulation experiments on the velocity model of representative complex geologic structures in Shengli oilfield demonstrate that the nested-dissection method has many advantages compared to compressed storage format, such as saving huge storage and computing time and high computing efficiency, etc., and it can be definitely used to simulate real data.

Key words: nested-dissection method, finite difference, frequency space domain, sparse matrix, hypocenter singularity

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