Seismic characterization of geologically complex geothermal reservoirs by combining structure-oriented filtering and attributes analysis

•Volumetric seismic attributes are quite effective for detecting seismic discontinuities but are sensitive to noise.•Integrating the curvelets transform and the structure-oriented second-order total-variation regularization improves the signal-to-noise ratio.•Volumetric seismic attribute along with structure-oriented filtering can be used to explore deeply buried geothermal reservoirs.•Validated the fracture distribution by overlying the extracted attributes with seismic fault networks and fracture density.