Print Email Facebook Twitter Air gun near the sea floor as shear-wave source? Title Air gun near the sea floor as shear-wave source? Author Drijkoningen, G.G. Dieulangard, D. Holicki, M.E. Faculty Civil Engineering and Geosciences Department Geoscience & Engineering Date 2015-06-01 Abstract The feasibility of using an air gun near the sea floor as shear-wave source has been investigated. With an air gun near the sea floor, an evanescent P-wave in the water becomes a propagating S-wave in the sea floor, such that it seems that a pure shear-wave source has been used at the sea floor. This type of wave has been called a P*S wave. An experiment with such a set-up has been carried out at the Valhall field. For that case, modelling shows that shear-wave related event of the type of P*S waves can be expected with such a set-up. Especially at larger offsets, P*S waves can be expected. When analysing the field records and Constant-Velocity Stacks, it is hard to find P*S-wave reflected events. On the other hand, P*S-wave refracted events can be discerned in records. These events can be brought up to stack level and imaged, as shown in this paper. To reference this document use: http://resolver.tudelft.nl/uuid:4ee2aac1-3da7-40e8-b586-d7ef4605d30f Publisher EAGE Source 77th EAGE Conference and Exhibition 2015, Madrid, Spain, 1-4- June 2015 Part of collection Institutional Repository Document type conference paper Rights (c) 2015 The Author(s) Files PDF 317046.pdf 1.45 MB Close viewer /islandora/object/uuid:4ee2aac1-3da7-40e8-b586-d7ef4605d30f/datastream/OBJ/view