Full Wave Field Simulation Of Elastic Waves In Anisotropic Media With Multiple Types Sources

The nine-component multi-wave seismic technology based on the shear wave source is advanced technology in the rapid development of the oil and gas exploration industry at home and abroad in recent years,and has huge advantages and potential in the exploration of unconventional and complex oil and gas reservoirs.However,the seismic shear wave propagation mechanism and wave field forward modeling method need to be further improved and developed.In this paper,based on the first-order stress-velocity equation and the elastic wave field theory,the numerical simulation of multiple sources such as longitudinal wave source,transverse wave source,vertical force source and horizontal force source is realized;the characteristics of elastic wave fields excited by different sources are analyzed in detail.Secondly,combined with the standard staggered grid(SSG)to achieve isotropic(ISO),horizontal isotropy(VTI,HTI),orthotropic(OA)medium elastic wave field numerical simulation,combined with rotating staggered grid(RSG)and diamond staggered grid(DSG),numerical simulation of elastic wave field of complex anisotropic media such as TTI,monoclinic and triclinic with tilted symmetry axis is realized;Finally,the above method is applied to the full wave field numerical simulation of fractured oil and gas reservoirs.The research results of this paper will provide important theoretical basis and method support for nine-component multi-wave seismic exploration.