Print Email Facebook Twitter New method for discriminating 4D time shifts in the overburden and reservoirr Title New method for discriminating 4D time shifts in the overburden and reservoirr Author Liu, Yi (Norwegian University of Science and Technology (NTNU)) Arntsen, B (Norwegian University of Science and Technology (NTNU)) Landrö, M (Norwegian University of Science and Technology (NTNU)) van der Neut, J.R. (TU Delft Applied Geophysics and Petrophysics) Wapenaar, C.P.A. (TU Delft Applied Geophysics and Petrophysics) Contributor Sicking, Charles (editor) Ferguson, John (editor) Date 2016 Abstract Understanding seismic changes in the subsurface is important for reservoir management and health, safety and environmental (HSE) issues. Typically the changes are interpreted based on the time shifts in seismic time-lapse (4D) data, where sources are at the surface and receivers are either at the surface or in a borehole. With these types of acquisition geometry, it is more straightforward to detect and interpret changes in the overburden, close to the source and receivers, than changes in the deeper part close to the reservoir, because the time shift is accumulative along its ray path from source to receiver. We propose a new method for reconstructing the reflection responses of the overburden and the reservoir, separately, for 4D time shift analysis. This method virtually moves sources and receivers to a horizontal borehole level, which enables a more direct interpretation of the time shifts to the changes close to the borehole, instead of to the surface. A realistic field model is used to demonstrate the method, and we observe a clear discrimination of the different time shifts in the overburden and reservoir, which is not obvious in the original datasets. Subject reconstructiontime-lapsetraveltimedownhole receiversinternal multiples To reference this document use: http://resolver.tudelft.nl/uuid:170cc1de-39a6-4906-ad7a-935382da4232 DOI https://doi.org/10.1190/segam2016-13957767.1 Publisher SEG Source SEG Technical Program Expanded Abstracts 2016 Event SEG International Exposition and 86th Annual Meeting, 2016-10-16 → 2016-10-21, Dallas & Kay Bailey Hutchison Convention Center, Dallas, United States Series SEG Technical Program Expanded Abstracts, 1949-4645, 2016 Part of collection Institutional Repository Document type conference paper Rights © 2016 Yi Liu, B Arntsen, M Landrö, J.R. van der Neut, C.P.A. Wapenaar Files PDF Seg_16e.pdf 499.61 KB Close viewer /islandora/object/uuid:170cc1de-39a6-4906-ad7a-935382da4232/datastream/OBJ/view