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Seismic fluid discrimination based on two-phase media theory
YIN Xing-yao1, LI Chao1, ZHANG Shi-xin2
(1.School of Geosciences in China University of Petroleum, Qingdao 266580, China;2.CNOOC Research Institute, Beijing 100027, China)
Abstract:
To avoid the cumulative error and to enhance the accuracy of fluid discrimination, a direct extracting approach for fluid factors based on elastic impedance inversion and a novel solid-fluid decoupled way to constructing the fluid factor with poroelastic theory were proposed. Seismic velocity dispersion is persistently observed in hydrocarbon reservoirs. Based on mesoscopic scale rock physics theory, a dispersion-dependent attribute inversion method was developed for reservoir fluid discrimination by using pre-stack seismic data. This method provides quantitative inversion scheme of the dispersion-dependent attributes with high accuracy. Applications on real data show that this fluid discrimination method which combines fluid factor based on the two-phase media theory and pre-stack seismic inversion is more accurate and stable.
Key words:  two-phase media  fluid discrimination  elastic impedance  pre-stack seismic inversion  dispersion-dependent attribute