Abstract:

 According to the characteristics of sand impedance close with shale's in Karratha reservoir containing carboniferous seriously,the article put forward facies-controlled reservoir prediction using seismic sedimentary. The article described key technology methods of the seismic sedimentary, such as the smallest isochronia-unit built by time-frequency analysis, rock and lithofacies physics phase analysis to determine the seismic response under the smallest isochronia-unit. Research results suggested that the thick sandstone with strong oscillation amplitude reflection. The plane quantitative analysis of pseudo-seismic entropy and twisting properties of the distinction between the effective distribution of sand and shale, may provide information for portraying the distribution of sand and shale accurately and for choosing favorable zones. Sand shape is described by attribute projection technology using inversion data. The research carried out the practical significance of the concept of facies-controlled reservoir prediction,demonstrated good discipline advantages of the seismic sedimentology in the sedimentary micro-facies analysis and forecasting lithologic traps.

Key words: seismic sedimentology, facies-controlled reservoir prediction, Karratha Formation, Tahe oilfield