关键词: 多子波分解, 不同主频, 子波集合, 叠加, 含气性预测

Abstract: Daniudi Gasfield in Ordos Basin is typically a lithologic gas reservoir with tight and anisotropic characteristics.
There is no obvious seismic response of sand body due to low resolution，small difference of acoustic impedance between sand
and shale，and strong reflection events from coal. Therefore，it is very difficult to predict the reservoirs in the area. Using the
multi-wavelet seismic trace decomposition and reconstruction，each post-stack seismic trace is decomposed into a set of Ricker
wavelets of different dominant frequencies. A new seismic volume is then reconstructed with wavelets within a selected range
of dominant frequencies that reflect the reservoirs and used to predict the reservoirs and gas-bearing property.

Key words: multi-wavelet seismic trace decomposition, different dominant frequencies, set of wavelets, reconstruction, gasbearingproperty prediction