The effective storage spaces of the deeply buried carbonate reservoir in Hadexun area, Tarim basin, China are secondary dissolved pores, cavities and fractures. The matrix porosity and permeability is very low. The multistage structural movement makes the complex reservoir distribution. The conventional AVOF inversion method best on the isotropic medium assumption doesn’t consider the influence of azimuth. Therefore, do not to accurately describe this special and complex reservoir. However, AVOZF inversion algorithm utilizes azimuth and frequency information to identify the fluid in complex geological structures. In this paper, the AVOZF inversion method is applied on 3D seismic data of Hadexun area to solve the problem of fluid identification and effective fracture prediction in carbonate reservoir. The comparisons are also made with AVOF inversion method to illustrate the efficiency for fluid identification and with AVOZ inversion method to characterizing the effective fractures. The application demonstrates AVOZF inversion method provides robust information for reservoir characterization and improves the accuracy of oil exploration in anisotropic media, which successfully offers key information for well optimization and deployment and reduce drilling risk.

Note: This paper was accepted into the Technical Program but was not presented at the 2020 SEG Annual Meeting.

Keywords:
reservoir characterization, seismic data, effective fracture prediction, avoz inversion, complex reservoir, avozf inversion, exploration geophysicist 10, inversion, carbonate reservoir, hadexun area
Subjects:
Reservoir Characterization, Unconventional and Complex Reservoirs, Seismic processing and interpretation, Naturally-fractured reservoirs, Carbonate reservoirs
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2020. Society of Exploration Geophysicists
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