Post-stack time domain image with broadened spectrum

A non-transitory computer-readable storage medium storing instructions executable by one or more computer processors, the instructions when executed by the one or more computer processors cause the one or more computer processors to:

• receive a post-stack time-domain image having a first spectrum and representing one or more subsurface structures;
• reconstruct an increased-frequency version of the post-stack time-domain image using L0-constrained inversion and a least-squares mismatch ratio, the increased-frequency version of the post-stack time-domain image comprising structural artifacts;
• remove the structural artifacts from the increased-frequency version of the post-stack time-domain image using singular value decomposition (SVD);
• combine the increased-frequency version of the post-stack time-domain image with the post-stack time-domain image using a weighting function;
• and
• generate a combined version of the increased-frequency version of the post-stack time-domain image and the post-stack time-domain image, the combined version representing the one or more subsurface structures and having a second spectrum broader than the first spectrum.

A computer system comprising:

• one or more computer processors;
• and
• a non-transitory computer-readable storage medium storing instructions executable by the one or more computer processors, the instructions when executed by the one or more computer processors cause the one or more computer processors to:
• receive a post-stack time-domain image having a first spectrum and representing one or more subsurface structures;
• reconstruct an increased-frequency version of the post-stack time-domain image using L0-constrained inversion and a least-squares mismatch ratio, the increased-frequency version of the post-stack time-domain image comprising structural artifacts;
• remove the structural artifacts from the increased-frequency version of the post-stack time-domain image using singular value decomposition (SVD);
• combine the increased-frequency version of the post-stack time-domain image with the post-stack time-domain image using a weighting function;
• and
• generate a combined version of the increased-frequency version of the post-stack time-domain image and the post-stack time-domain image, the combined version representing the one or more subsurface structures and having a second spectrum broader than the first spectrum.