3D North Sea case study of reconstruction

Irregularly and sparsely sampled seismic data that has been shot with a predominant azimuth for long offsets can be completely reconstructed. Our method uses reposting along receiver lines to exact crossline positions, followed by least squares reconstruction in the midpoint-offset domain. This reconstruction scheme has been applied to a 3D marine dataset from the North Sea. Various aspects and applications of reconstruction are addressed and enlightened with examples from this dataset. The seismic response can be reconstructed at any midpoint and offset location and, optionally, primary reflections can be separated from noise. Imaging after reconstruction shows improved resolution compared to conventional imaging.