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- W4386548506 abstract "Summary This paper explores a fast ray-based VSP imaging method and presents its application in the Distributed Acoustic Sensing VSP (DAS-VSP) P-wave and converted wave imaging. We use a multi-template fast-advancement algorithm (MSFM) to obtain the travel timetable for each shot-receiver pair, which is then summed for each shot-receiver pair before sorted at each depth. Given the number of common depth points (CDPs), the travel timetable is sorted by travel time. The field records are projected to the image domain via the sorted travel timetable. The projected wave field data is then stacked while the folds of projections at each position is calculated to obtain the average value of each position. The data and travel timetable are then converted one by one and stacked to form an imaging profile. By allowing flexible migration aperture, this method combines the advantages of both the VSP-CDP transform and migration. It focuses imaging near the reflection path, reduces migration artifacts, and addresses the problem of uneven coverage imaging amplitude by accounting for the fold of coverages during the imaging process. Using the grid ray tracing imaging method, DAS-VSP P-wave and converted wave imaging have been achieved in both numerical and field data examples." @default.
- W4386548506 created "2023-09-09" @default.
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- W4386548506 date "2023-01-01" @default.
- W4386548506 modified "2023-10-16" @default.
- W4386548506 title "DAS-VSP Imaging Method: a Fast Ray-Based Approach through Multi Template Fast Advancement Algorithm" @default.
- W4386548506 doi "https://doi.org/10.3997/2214-4609.2023628034" @default.
- W4386548506 hasPublicationYear "2023" @default.
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