Frequency dispersion and attenuation decoupling power law frequency change Q effect numerical simulation method

• Main Authors: CHEN TONGJUN, ZHANG YABING, ZHAO LIMING
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; DETECTING MASSES OR OBJECTS; ELECTRIC DIGITAL DATA PROCESSING; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention discloses a dispersion and attenuation decoupling power law frequency-dependent Q effect numerical simulation method. The method comprises the following steps: S1, deducing a complex modulus and a viscous acoustic wave equation based on a power law frequency-dependent Q effect; s2, solving a viscoacoustic wave equation by using a numerical method; s3, analyzing stability conditions; and S4, setting a seismic source and a receiver. The method overcomes the defects that an existing viscous acoustic wave numerical simulation method can only simulate the constant Q effect and neglects the characteristic that Q changes along with frequency, numerical simulation of the full-band power law frequency-variable Q effect is achieved, the method has the advantages that amplitude attenuation and phase frequency dispersion are mutually decoupled, and the calculated amount is equivalent to that of a traditional constant Q method; the method can be further applied to Q compensation reverse time migration imagin