论文部分内容阅读
实际地层广泛存在各向异性和黏滞性,使得地震波波形发生改变,振幅能量降低,降低了成像的分辨率。为了进行深部储层高精度成像,本文基于GSLS模型黏声各向同性介质理论,将其扩展到各向异性介质中,给出了黏声垂直横向各向同性(VTI)介质声波拟微分方程组,采用伪谱法进行数值模拟。引入规则化算子消除高频不稳定问题,构建稳定的逆时传播算子,实现黏声VTI介质逆时偏移。该方法在成像过程中,考虑了各向异性和黏滞性的影响,具有更高的分辨率和振幅保真度,模型试算验证了方法的正确性。
The widespread anisotropy and viscosity of the actual formation, making the seismic waveforms change, reduce the amplitude and energy, reducing the imaging resolution. In order to carry out high-precision imaging of deep reservoirs, based on the visco-acoustic isotropic medium theory of GSLS model, this paper extends it to anisotropic media and gives the acoustic acoustic differential equations of acoustic transverse vertical isotropic (VTI) media , Using pseudo-spectral method for numerical simulation. The regularization operator is introduced to eliminate the high frequency instability, and a stable inverse time propagator is constructed to realize the inverse time migration of visco-acoustic VTI media. In the imaging process, the anisotropic and viscous effects are taken into consideration. The method has higher resolution and amplitude fidelity. The model test proves the correctness of the method.