Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field

Time-lapse seismic inversion approach to reservoir management has proven to be a vital tool in the industry today because of its effectiveness in tracking the movement of fluid front within the reservoir as well as identifying isolated bypassed accumulations. A base (2001) and three monitor (2003, 2...

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Main Author: Ammah, Anass Nii-Armah
Other Authors: Tjåland, Egil, Norges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for petroleumsteknologi og anvendt geofysikk
Format: Master Thesis
Language:English
Published: Institutt for petroleumsteknologi og anvendt geofysikk 2012
Subjects:
Online Access:http://hdl.handle.net/11250/239790
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spelling ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/239790 2023-05-15T17:25:05+02:00 Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field Ammah, Anass Nii-Armah Tjåland, Egil Norges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for petroleumsteknologi og anvendt geofysikk 2012 http://hdl.handle.net/11250/239790 eng eng Institutt for petroleumsteknologi og anvendt geofysikk 566124 ntnudaim:7213 http://hdl.handle.net/11250/239790 90 ntnudaim:7213 MSG2 Petroleum Geosciences Petroleum Geophysics Master thesis 2012 ftntnutrondheimi 2019-09-17T06:48:52Z Time-lapse seismic inversion approach to reservoir management has proven to be a vital tool in the industry today because of its effectiveness in tracking the movement of fluid front within the reservoir as well as identifying isolated bypassed accumulations. A base (2001) and three monitor (2003, 2004 and 2006) seismic surveys from the Norne field were inverted during this research. Water and gas have been injected into the reservoir to maintain the initial pressure within the field. These seismic surveys were analyzed for time-lapse impedance changes due to the differences in the produced hydrocarbons and the injected fluids. Check-shot corrected well data as well as interpreted horizons were integrated in the inversion process. Two independent wavelets were extracted from base and monitor surveys and combined to form an all-encompassing frequency and amplitude wavelet. The base and monitors were jointly inverted. This is because of the reduction in inconsistencies that are associated with independent inversions of surveys and the production related changes expected in time-lapse inverted seismic data.The results of the inversion show the impedance difference across the field for the various monitor surveys. Areas surrounding producer wells show slight changes in impedance while great impedance difference are observed around injector wells. A statistical analysis of the inversion results also shows steady increase in impedance across the field for the subsequent monitors. Structural and stratigraphic interpretation of the time-lapse inverted data also confirmed the sealing properties of some formations. This sealing property supported the impedance changes within the field. Fault interpretations as well as its sealing and non-sealing properties were inferred from the impedance differences across various discontinuities. Time-lapse acoustic impedance inversion of the Norne post-stack seismic data has revealed the impacts of production, dynamic fluid changes across main identified geologic structures, fluid front migration, fluid communication across structures and segments and other identified stratigraphic elements. Master Thesis Norne field NTNU Open Archive (Norwegian University of Science and Technology)
institution Open Polar
collection NTNU Open Archive (Norwegian University of Science and Technology)
op_collection_id ftntnutrondheimi
language English
topic ntnudaim:7213
MSG2 Petroleum Geosciences
Petroleum Geophysics
spellingShingle ntnudaim:7213
MSG2 Petroleum Geosciences
Petroleum Geophysics
Ammah, Anass Nii-Armah
Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field
topic_facet ntnudaim:7213
MSG2 Petroleum Geosciences
Petroleum Geophysics
description Time-lapse seismic inversion approach to reservoir management has proven to be a vital tool in the industry today because of its effectiveness in tracking the movement of fluid front within the reservoir as well as identifying isolated bypassed accumulations. A base (2001) and three monitor (2003, 2004 and 2006) seismic surveys from the Norne field were inverted during this research. Water and gas have been injected into the reservoir to maintain the initial pressure within the field. These seismic surveys were analyzed for time-lapse impedance changes due to the differences in the produced hydrocarbons and the injected fluids. Check-shot corrected well data as well as interpreted horizons were integrated in the inversion process. Two independent wavelets were extracted from base and monitor surveys and combined to form an all-encompassing frequency and amplitude wavelet. The base and monitors were jointly inverted. This is because of the reduction in inconsistencies that are associated with independent inversions of surveys and the production related changes expected in time-lapse inverted seismic data.The results of the inversion show the impedance difference across the field for the various monitor surveys. Areas surrounding producer wells show slight changes in impedance while great impedance difference are observed around injector wells. A statistical analysis of the inversion results also shows steady increase in impedance across the field for the subsequent monitors. Structural and stratigraphic interpretation of the time-lapse inverted data also confirmed the sealing properties of some formations. This sealing property supported the impedance changes within the field. Fault interpretations as well as its sealing and non-sealing properties were inferred from the impedance differences across various discontinuities. Time-lapse acoustic impedance inversion of the Norne post-stack seismic data has revealed the impacts of production, dynamic fluid changes across main identified geologic structures, fluid front migration, fluid communication across structures and segments and other identified stratigraphic elements.
author2 Tjåland, Egil
Norges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for petroleumsteknologi og anvendt geofysikk
format Master Thesis
author Ammah, Anass Nii-Armah
author_facet Ammah, Anass Nii-Armah
author_sort Ammah, Anass Nii-Armah
title Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field
title_short Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field
title_full Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field
title_fullStr Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field
title_full_unstemmed Applying Time-Lapse Seismic Inversion In Reservoir Management: A Case Study Of The Norne Field
title_sort applying time-lapse seismic inversion in reservoir management: a case study of the norne field
publisher Institutt for petroleumsteknologi og anvendt geofysikk
publishDate 2012
url http://hdl.handle.net/11250/239790
genre Norne field
genre_facet Norne field
op_source 90
op_relation 566124
ntnudaim:7213
http://hdl.handle.net/11250/239790
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