New method for discriminating 4D time shifts in the overburden and reservoirr

Yi Liu, B Arntsen, M Landrö, Joost van der Neut, Kees Wapenaar

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

15 Downloads (Pure)

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.
Original languageEnglish
Title of host publicationSEG Technical Program Expanded Abstracts 2016
EditorsCharles Sicking, John Ferguson
PublisherSEG
Pages5521-5526
Number of pages6
DOIs
Publication statusPublished - 2016
EventSEG International Exposition and 86th Annual Meeting - Dallas & Kay Bailey Hutchison Convention Center, Dallas, United States
Duration: 16 Oct 201621 Oct 2016
Conference number: 86
http://seg.org/Events/Annual-Meeting

Publication series

NameSEG Technical Program Expanded Abstracts
PublisherSEG
Volume2016
ISSN (Electronic)1949-4645

Conference

ConferenceSEG International Exposition and 86th Annual Meeting
Abbreviated titleSEG 2016
CountryUnited States
CityDallas
Period16/10/1621/10/16
Internet address

Keywords

  • reconstruction
  • time-lapse
  • traveltime
  • downhole receivers
  • internal multiples

Fingerprint

Dive into the research topics of 'New method for discriminating 4D time shifts in the overburden and reservoirr'. Together they form a unique fingerprint.

Cite this