Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model
Hydrocarbon reservoirs exhibiting features inherited from former karst processes acting on the reservoir rocks are relatively common worldwide. However, on the Norwegian continental shelf, paleokarst plays have only recently been identified in the Barents Sea. The substantial resource potential of t...
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The University of Bergen
2016
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ftunivbergen:oai:bora.uib.no:1956/15419 2023-05-15T15:39:09+02:00 Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model Ledsaak, Karina 2016-11-20 19189403 bytes application/pdf https://hdl.handle.net/1956/15419 eng eng The University of Bergen https://hdl.handle.net/1956/15419 Copyright the Author. All rights reserved Paleokarst geo-modelling Karst Petroleumsforekomster https://data.ub.uio.no/realfagstermer/c006430 https://data.ub.uio.no/realfagstermer/c011570 756199 Master thesis 2016 ftunivbergen 2023-03-14T17:43:47Z Hydrocarbon reservoirs exhibiting features inherited from former karst processes acting on the reservoir rocks are relatively common worldwide. However, on the Norwegian continental shelf, paleokarst plays have only recently been identified in the Barents Sea. The substantial resource potential of the new plays is balanced by the known inherent complexity of paleokarst, and highlights the need for improved understanding of these reservoirs. Paleokarst reservoir characteristics are the sum of complex depositional, erosional and diagenetic processes, which tend to produce reservoirs with extreme and highly localized contrasts in permeability. In order to study how different paleokarst reservoirs respond to production and injection it is necessary to employ reservoir models. These models can provide guidelines for production strategies and ensure safe and optimal recovery. As individual paleokarst features are generally below seismic resolution, the obvious way to construct models of likely paleokarst reservoirs is to employ maps of present day karst features as a starting point and forward model their likely collapse, diagenesis and infill. Such models provide analogues for subsurface reservoirs. At present, industrial reservoir modelling software packages do not include dedicated tools or workflows for handling common paleokarst features such as cave networks. For this reason, work- arounds and a lot of out-of-the box" thinking must be applied to create a realistic and natural looking paleokarst reservoir. Some work has previously been done with respect to modelling cave systems in a stochastic manner, but there has been limited work concentrating on deterministically modelling of cave systems based on existing caves. The present thesis is a contribution to this on- going effort. The workflow employs the RMS^TM 2013.1.2 reservoir modelling suite, and is based on a survey of the Setergrotta cave, located in the northern parts of Norway. It allows deterministic incorporation of the original cave geometry into a ... Master Thesis Barents Sea University of Bergen: Bergen Open Research Archive (BORA-UiB) Barents Sea Norway |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Paleokarst geo-modelling Karst Petroleumsforekomster https://data.ub.uio.no/realfagstermer/c006430 https://data.ub.uio.no/realfagstermer/c011570 756199 |
spellingShingle |
Paleokarst geo-modelling Karst Petroleumsforekomster https://data.ub.uio.no/realfagstermer/c006430 https://data.ub.uio.no/realfagstermer/c011570 756199 Ledsaak, Karina Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
topic_facet |
Paleokarst geo-modelling Karst Petroleumsforekomster https://data.ub.uio.no/realfagstermer/c006430 https://data.ub.uio.no/realfagstermer/c011570 756199 |
description |
Hydrocarbon reservoirs exhibiting features inherited from former karst processes acting on the reservoir rocks are relatively common worldwide. However, on the Norwegian continental shelf, paleokarst plays have only recently been identified in the Barents Sea. The substantial resource potential of the new plays is balanced by the known inherent complexity of paleokarst, and highlights the need for improved understanding of these reservoirs. Paleokarst reservoir characteristics are the sum of complex depositional, erosional and diagenetic processes, which tend to produce reservoirs with extreme and highly localized contrasts in permeability. In order to study how different paleokarst reservoirs respond to production and injection it is necessary to employ reservoir models. These models can provide guidelines for production strategies and ensure safe and optimal recovery. As individual paleokarst features are generally below seismic resolution, the obvious way to construct models of likely paleokarst reservoirs is to employ maps of present day karst features as a starting point and forward model their likely collapse, diagenesis and infill. Such models provide analogues for subsurface reservoirs. At present, industrial reservoir modelling software packages do not include dedicated tools or workflows for handling common paleokarst features such as cave networks. For this reason, work- arounds and a lot of out-of-the box" thinking must be applied to create a realistic and natural looking paleokarst reservoir. Some work has previously been done with respect to modelling cave systems in a stochastic manner, but there has been limited work concentrating on deterministically modelling of cave systems based on existing caves. The present thesis is a contribution to this on- going effort. The workflow employs the RMS^TM 2013.1.2 reservoir modelling suite, and is based on a survey of the Setergrotta cave, located in the northern parts of Norway. It allows deterministic incorporation of the original cave geometry into a ... |
format |
Master Thesis |
author |
Ledsaak, Karina |
author_facet |
Ledsaak, Karina |
author_sort |
Ledsaak, Karina |
title |
Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
title_short |
Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
title_full |
Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
title_fullStr |
Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
title_full_unstemmed |
Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
title_sort |
geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model |
publisher |
The University of Bergen |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/15419 |
geographic |
Barents Sea Norway |
geographic_facet |
Barents Sea Norway |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_relation |
https://hdl.handle.net/1956/15419 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766370617415696384 |