Seismic time-frequency spectrum to indicate sandstone scale in tight oil reservoirs

The horizontal drilling and volumetric fracturing technologies have successfully been applied to tight oil reservoirs. To reduce the risk of the horizontal drilling and fracturing, a quantitative scale of sandstone should be provided by the seismic method. However, estimating an exact scale is unavailable due to the low quality of seimic survey in tight reservoirs, the Ordos Basin. As a qualitative alternative, the seismic time-frequency spectrum was introduced to indicate sandstone scale in this study. Recently, many time-frequency tools are used in seismic data. But this study requires a time-frequency tool that can provide well frequency resolution. Therefore, to reduce energy spreading in the time-frequency plane, we proposed to use the synchrosqueezed wavelet transform that can sharpen the time-frequency representation. We apply the synchrosqueezed wavelet transform to seismic data and show its potential to the application of sandstone scale indicator.