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Geophysical characterization and petrographic analysis of cap and reservoir rocks within the Lund Sandstone in Kyrkheddinge

Jakobsson, Mikael LU (2014) In Dissertations in Geology at Lund University GEOL01 20141
Department of Geology
Abstract
Geophysical investigations in the Kyrkheddinge area including seismic surveys and wire-line logging were carried out by Swedegas AB between 1978-1985. This study has used the data to make a geophysical and petrographic characterization of cap-rock and reservoir sections within the Lund Sandstone in Kyrkheddinge to evaluate the conditions for storing gas in the bedrock. The Lund Sandstone comprises deposits of Campanian and Santonian age. Four lithologies have been identified; quartzose sandstone, calcareous sandstone, arenaceous limestone, and argillaceous limestone. Log correlation between four wells shows a dome-shaped trap structure beneath the surface at approximately 600 m depth and a lateral continuity of several cap-rock and... (More)
Geophysical investigations in the Kyrkheddinge area including seismic surveys and wire-line logging were carried out by Swedegas AB between 1978-1985. This study has used the data to make a geophysical and petrographic characterization of cap-rock and reservoir sections within the Lund Sandstone in Kyrkheddinge to evaluate the conditions for storing gas in the bedrock. The Lund Sandstone comprises deposits of Campanian and Santonian age. Four lithologies have been identified; quartzose sandstone, calcareous sandstone, arenaceous limestone, and argillaceous limestone. Log correlation between four wells shows a dome-shaped trap structure beneath the surface at approximately 600 m depth and a lateral continuity of several cap-rock and reservoir units. Petrophysical properties show heterogeneous reservoir sandstone units with excellent porosity and permeability values as well as impermeable heterogeneous cap-rock units with varying clay content. The Lund Sandstone displays in general suitable properties for storing gas. However, seismic data revealed the existence of a possible fault that may have affected the closed structure of the B reservoir, which led to abandoning the project beside strategic decision on optimal placing and storage type. Further studies on how the fault affects the storage possibilities is recommended. Moreover, investigations have identified potential sand intervals with overlying cap-rocks at greater depths than the sand B reservoir which could be studied in more detail. There is a great potential to use the vast amount of data and knowledge from the site investigations at Kyrkheddinge for cap-rock and reservoir modeling, and research regarding storage of natural gas and CO2. (Less)
Abstract (Swedish)
Geofysiska undersökningar i Kyrkheddingeområdet inkluderande seismiska undersökningar och borrhålsloggning har genomförts av Swedegas AB mellan 1978-1985. Denna studie har använt dessa data för att göra en geofysisk och petrografisk karaktärisering av tak- och reservoarsektioner inom campansekvensen (Lundasandstenen) i Kyrkheddinge för att utvärdera förutsättningarna för lagring av gas i den sedimentära berggrunden. Lundasandstenen består av avlagringar från campan och santon ålder. Fyra litologier har identifierats; kvartssandsten, karbonatcementerad sandsten, sandig kalksten och lerig kalksten. Loggkorrelation mellan fyra brunnar visar en antiklinal struktur under ytan på ca 600 m djup och en lateral kontinuitet för flera tak- och... (More)
Geofysiska undersökningar i Kyrkheddingeområdet inkluderande seismiska undersökningar och borrhålsloggning har genomförts av Swedegas AB mellan 1978-1985. Denna studie har använt dessa data för att göra en geofysisk och petrografisk karaktärisering av tak- och reservoarsektioner inom campansekvensen (Lundasandstenen) i Kyrkheddinge för att utvärdera förutsättningarna för lagring av gas i den sedimentära berggrunden. Lundasandstenen består av avlagringar från campan och santon ålder. Fyra litologier har identifierats; kvartssandsten, karbonatcementerad sandsten, sandig kalksten och lerig kalksten. Loggkorrelation mellan fyra brunnar visar en antiklinal struktur under ytan på ca 600 m djup och en lateral kontinuitet för flera tak- och reservoarenheter. Petrofysiska egenskaper visar heterogena sandstensenheter med utmärkta porositets- och permeabilitetsvärden, samt ogenomträngliga heterogena takbergarter med varierande lerhalt. Lundasandstenen visar generellt lämpliga egenskaper för lagring av gas. Dock avslöjade seismiska undersökningar att en förkastning i området kan ha påverkat den slutna strukturen för B-reservoaren, som tillsammans med strategiska beslut om optimal placering och typ av förvaring ledde till att projektet avslutades. Ytterligare undersökningar om hur förkastningen påverkar förvaringsmöjligheterna rekommenderas. Dessutom har undersökningar identifierat potentiella sandintervall med överliggande takbergarter på större djup än sand B-reservoaren, vilka kan studeras närmare. Det finns goda möjligheter att använda den stora mängd data och kunskap från platsundersökningarna i Kyrkheddinge för tak- och reservoarbergartsmodellering, samt forskning om lagring av naturgas och CO2. (Less)
Please use this url to cite or link to this publication:
author
Jakobsson, Mikael LU
supervisor
organization
alternative title
Geofysisk karaktärisering och petrografisk analys av tak– och reservoarbergarter inom campansekvensen i Kyrkheddinge
course
GEOL01 20141
year
type
M2 - Bachelor Degree
subject
keywords
wire-line logging, Lund Sandstone, natural gas storage, Scania, Reservoir rock, reservoarbergart, borrhålsloggning, Lundasandstenen, naturgaslager, Skåne
publication/series
Dissertations in Geology at Lund University
report number
405
language
English
id
4465158
date added to LUP
2014-06-24 16:40:49
date last changed
2014-06-24 16:40:49
@misc{4465158,
  abstract     = {{Geophysical investigations in the Kyrkheddinge area including seismic surveys and wire-line logging were carried out by Swedegas AB between 1978-1985. This study has used the data to make a geophysical and petrographic characterization of cap-rock and reservoir sections within the Lund Sandstone in Kyrkheddinge to evaluate the conditions for storing gas in the bedrock. The Lund Sandstone comprises deposits of Campanian and Santonian age. Four lithologies have been identified; quartzose sandstone, calcareous sandstone, arenaceous limestone, and argillaceous limestone. Log correlation between four wells shows a dome-shaped trap structure beneath the surface at approximately 600 m depth and a lateral continuity of several cap-rock and reservoir units. Petrophysical properties show heterogeneous reservoir sandstone units with excellent porosity and permeability values as well as impermeable heterogeneous cap-rock units with varying clay content. The Lund Sandstone displays in general suitable properties for storing gas. However, seismic data revealed the existence of a possible fault that may have affected the closed structure of the B reservoir, which led to abandoning the project beside strategic decision on optimal placing and storage type. Further studies on how the fault affects the storage possibilities is recommended. Moreover, investigations have identified potential sand intervals with overlying cap-rocks at greater depths than the sand B reservoir which could be studied in more detail. There is a great potential to use the vast amount of data and knowledge from the site investigations at Kyrkheddinge for cap-rock and reservoir modeling, and research regarding storage of natural gas and CO2.}},
  author       = {{Jakobsson, Mikael}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{Dissertations in Geology at Lund University}},
  title        = {{Geophysical characterization and petrographic analysis of cap and reservoir rocks within the Lund Sandstone in Kyrkheddinge}},
  year         = {{2014}},
}