Different Methods of QC the Low Frequency Content of Broadband Data for Reservoir Characterisation

Broadband seismic data becomes more common in the industry and acknowledged to improve the quality of reservoir characterization. Seismic inversion is widespread to support quantitative interpretation and its results are used within different areas from exploration to development. Extended seismic bandwidth allows reducing or even neglecting the dependence for seismic inversion results from well-driven low frequency model. More so, it’s very important to assess the quality of such low frequency content prior any reservoir characterization workflows applied.

In the current study it is suggested to discuss the different approaches to do a quality control of the low frequency content of broadband seismic data and associated velocity volume.

The discussed tools to perform both qualitative and quantitative QCs are: (1) visualization of seismic sections filtered with different high cut filters; (2) comparison of Intercept-Gradient crossplots for conventional and broadband seismic data, e.g. how it affects S/N ratio, stability of Gradient estimation; (3) comparison of different seismic data-driven low frequency trends to well observations and low frequency (low-pass filtered) seismic content; (4) comparison of bandpass filtered versus broadband seismic inversion results, e.g. sections, slices, inverted curves at well locations, blind well tests; how it affects resolution, continuity and matches to well data/observations?