【摘要】 频率域正演是频率域全波形反演的基础,高效准确地完成频率域正演计算是目前该领域的一个热门问题。这里利用优化17点差分格式和PML完全匹配层构建波场,并使用LSQR算法求解波场,通过在简单层状模型和Overthrust模型上计算验证可知,LSQR算法可大幅提高频率域正演的计算速度和模拟精度,从而为此方向的研究提供一个可行的技术手段。更多还原

【Abstract】 The frequency domain forward is the basis of the freguency domain full-waveform inversion(FWI).How to efficiently and accurately complete the frequency domain computation is a hot issue in this field at present. In this paper, we use the optimized 17 point difference scheme and PML to construct wave field, and the use of the LSQR algorithm for solving the wave field. Through simple layered model and the Overthrust model calculation show that LSQR algorithm can greatly improve the calculation speed and accuracy of frequency domain modeling. Therefore, a feasible technical means is provided for the study of this direction.更多还原