• Geological note: Petrophysical and thermal properties of pre-Devonian basement rocks on the Norwegian continental margin 

      Slagstad, Trond; Ramstad, Randi K.; Davidsen, Børre; Barrére, Cécile (NGU Bulletin (448), Journal article, 2008)
      This Geological note presents petrophysical and thermal properties of pre-Devonian basement rocks along the Norwegian continental margin. The dataset is the first to present ground-truth data from basement rocks along the ...
    • Grunnvarmekartlegging i Asker og Bærum 

      Ramstad, Randi K.; Sørdal, Torbjørn; Solli, Arne; Midttømme, Kirsti; Elvebakk, Harald (NGU-Rapport (2004.013), Report, 2004)
      Geologien i området er avgjørende for om bruk av grunnvarme med energibrønn i fjell vil være et økonomisk lønnsomt alternativ. Tykke leir eller sandlag over fjell vil øke borekostnadene og berggrunnens egenskaper vil ...
    • KONTIKI Report 2005-2006, Continental Crust and Heat Generation In 3D 

      Slagstad, Trond; Olsen, Lars; Pascal, Christophe; Ramstad, Randi K.; Rendall, Hans O.; Rønning, Jan Steinar; Skilbrei, Jan Reidar; Wissing, Bjørn; Olesen, Odleiv; Ballling, Niels; Barrere, Cecile; Breiner, Niels; Davidsen, Børre; Ebbing, Jörg; Elvebakk, Harald; Gernigon, Laurent; Koziel, Janusz; Midttømme, Kirsti; Nordgulen, Øystein (NGU-Rapport (2006.059), Report, 2006)
    • Temperature footprint of a thermal response test can help to reveal thermogeological information 

      Brattli, Bjørge; Liebel, Heiko T.; Huber, Kilian; Frengstad, Bjørn S.; Ramstad, Randi K. (NGU Bulletin (451), Journal article, 2011)
      Borehole heat exchangers connected to a ground-coupled heat pump extract heat from the ground for the heating of buildings. Heat is transferred to the ground in cooling mode and can be extracted again during the next heating ...
    • The scaling potential of groundwater in southeastern Norway 

      Sæther, Ola M.; Ramstad, Randi K.; Grimstvedt, Andreas M. (NGU-Rapport (2005.005), Report, 2005)
      The degree of saturation of groundwater with respect to a wide range of solid phases is calculated for 240 private and public bedrock wells in Akershus and Østfold counties, southeastern Norway. The samples were collected ...
    • Thermogeology in the Oslo region and Kristiansand - results from thermal response tests (TRT) with and without artificially induced groundwater flow 

      Ramstad, Randi K.; Brattli, Bjørge; Liebel, Heiko T.; Huber, Kilian; Frengstad, Bjørn (NGU-Rapport (2009.069), Report, 2009)
      Thermal response tests (TRT) are widely used to measure the effective thermal conductivity and borehole resistance in a well. The gained data serve as the basis for the dimensioning of larger ground-source heat-pump ...