Prestack seismic inversion method and system based on double-phase medium solid-liquid decoupling

• Main Authors: LI CHAO, WU GUOCHEN, ZHANG SHIXIN, CAO DANPING, YIN XINGYAO, ZONG ZHAOYUN
• Format: Patent
• Language: English
• Published: 25.03.2015
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention provides a prestack seismic inversion method and system based on double-phase medium solid-liquid decoupling. The prestack seismic inversion method based on double-phase medium solid-liquid decoupling comprises the steps that prestack seismic data, logging data and geological achievement data of a target reservoir stratum are collected, a solid-liquid decoupling approximate equation is established, wavelets are extracted according to the prestack seismic data, the logging data, the geological achievement data and the solid-liquid decoupling approximate equation, an absolute elastic impedance data body is determined according to the prestack seismic data, the logging data, the geological achievement data and the wavelets, a fluid bulk modulus data body is determined according to the absolute elastic impedance data body, and the type of fluid in holes of the current reservoir stratum is recognized according to the fluid bulk modulus data body. According to the prestack seismic inversion method and system based on double-phase medium solid-liquid decoupling, due to the fact that the obtained fluid bulk modulus data body serves as a fluid factor, higher fluid indicating sensitivity is achieved, and the reliability of reservoir stratum fluid recognition and reservoir stratum characteristic description is effectively improved.