The Pairwise Region Comparison (PRC) image segmentation algorithm can function effectively as part of an iterative salt interpretation and model-building workflow. However, segmentation results have a higher degree of uncertainty when a boundary is faint or discontinuous (for example, on a sediment-flood image). In such cases, a targeted shot-profile migration scheme using datumed wavefields can test two or more possible models relatively quickly, allowing an interpreter to judge each model's accuracy either qualitatively or quantitatively (e.g., flatness of angle gathers). The use of generalized wavefields further reduces the computational expense of testing multiple salt-interpretation scenarios. With additional improvements, such as the inclusion of phase-encoding migration to improve the quality of images, this scheme could form the basis of an interactive interpretation and model-building workflow.
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