Strategy for a reassessment of the EGS potential of Europe Genter - PowerPoint PPT Presentation

Strategy for a reassessment of the EGS potential of Europe Genter A., Kohl Th., Ledru P., Van Wees J.D. genter@soultz.net Vilnius, Lithuania, Final Conference, 12-15 Feb 2008 European Economic Interest Group “Heat Mining” 12-15 Feb. 08 ENGINE Vilnius

Why a reassessment? > Why do we need a (re)evaluation of the EGS potential? • There is no EGS georesource or potential EGS map in Europe • Hidden resource: heterogeneities – uncertainty - risky • Quantify the heat in place in several areas or non conventional reservoirs • Various studies in different countries or areas but need to be harmonized in Europe • Inform decision makers, politicians, industry, scientists, media > How evidence the EGS resources in Europe? • Define existing and innovative EGS concepts/targets • Take into account technological progresses (binary cycle systems) and the impact in terms of drillable depths • Needs of regional studies by combining geoscientific and socio- economic data Elaborate a series of thematic EGS georesource maps 12-15 Feb. 08 ENGINE Vilnius > 2

What types of EGS systems? Unproductive Unconventional Conduction dominated EGS hydrothermal Geothermal Low natural permeability systems reservoirs Crystalline-rocks Volcanics Sediments Metamorphic areas rocks Geopressured Radiogenic granites North German basin reservoirs (Variscan belt, Guadeloupe (Gross Schönebeck ) Variscan belt (Urach) Lithuanian basement) Pannonian Basin La Réunion Molasse basin Tuscany (Larderello) Active grabens (Indian Ocean) (Altheim, Riem, Rhine graben Supercritical Unterhaching) (Soultz, Landau, Reservoirs Iceland, Russia, Basel) Greece, Portugal, Iceland Eger graben, Turkey, Spain, …. Limagne, Catalonia, Oil/gas fields Sardinia Innovative concepts Where are the fractured reservoirs at drillable depths in acceptable tectonic conditions hosted in hard rocks? What is the energy embedded in such areas? 12-15 Feb. 08 ENGINE Vilnius > 3

Heat Tectonic conditions Sufficient temperatures Pre-existing fractures Stress regime EGS Concept Suitable lithology Fluids Low permeability Hard rocks 12-15 Feb. 08 ENGINE Vilnius > 4

Deep temperatures in Europe ������ ���� ���� ���� ����� ����� ����� ����� ����� ����� ������ ����� ����� ����� ����� ����� ����� ������� 12-15 Feb. 08 ENGINE Vilnius > 5

EGS Potential in Europe Sweden DK UK Poland Germany Czec Slovakia High HFR potential France Moderate HFR potential Austria Hungary Romania Low HFR potential Croatia Italy Bosnia No calculations but Serbia Bulgaria promising HFR potential Spain Turkey Greece Genter et al., 2004 12-15 Feb. 08 ENGINE Vilnius > 6

Conductive dominated EGS Low natural permeability 12-15 Feb. 08 ENGINE Vilnius > 7

Regional scale: deep crystalline rocks in Lithuania Sliaupia et al., 2006 12-15 Feb. 08 ENGINE Vilnius > 8

Potential EGS areas from outcropping granite in Europe From A. Forster, GFZ, 2006 12-15 Feb. 08 ENGINE Vilnius > 9

Schematic map of the main EGS types Alpine front Tertiary graben + volcanism Complex back-arc basin + volcanism Thick sedimentary basin Outcropping granite EGS typology in Europe 12-15 Feb. 08 ENGINE Vilnius > 10

Fracture systems in the Eger graben Eger 12-15 Feb. 08 ENGINE Vilnius > 11

Geothermal potential in Germany Huenges et al., 2005 12-15 Feb. 08 ENGINE Vilnius > 12

Investigation of National Swiss Geothermal Resources 12-15 Feb. 08 ENGINE Vilnius > 13

a Unproductive hydrothermal systems Volcanic areas 12-15 Feb. 08 ENGINE Vilnius > 14

Geothermal in Russia (Povarov, 2006) 12-15 Feb. 08 ENGINE Vilnius > 15

Hot areas around hydrothermal systems in Guadeloupe (Bouillante) Isotherm 50° C 99,7° C Goguel, 1965 Temperatures measured at 2 m depth Sanjuan et al., 2007 12-15 Feb. 08 ENGINE Vilnius > 16

Temperatures at depth in Larderello (Tuscany) Temperature at the top of the upper reservoir Barelli et al., 1995 12-15 Feb. 08 ENGINE Vilnius > 17

Unconventional geothermal reservoirs Geopressured reservoirs Pannonian basin Supercritical reservoirs Icelandic reservoirs 12-15 Feb. 08 ENGINE Vilnius > 18

High enthalpy reservoirs in Hungary Inner Alpine-Carpathian Mountain belt POLA ND and the Dinarides Cracow Alpine-Carpathian flysch belt Neogene v olcanic rock Pieniny Klippen Belt Outer Carpathians potential high-enthalpy UKRA INE reserv oirs Western Car pathians Mid Hungarian Line Ukrainian East Slovakian Platfor m n Basin n Range Börzsöny i s a Bohem i an B 7 Vienna a Massif n Tokaij h Hungaria n e A i P V A Bükk Bratislava East ern Carpathians C Cserhat L Bülck Mts. A 8 Pilis Matra Nort e s n c Northern Calcareous Alps e 10 a i r e i a l G d danubian Range P u A USTRIA s B n e PANNONIAN Budapest a t r 9 e i r V Graz a y BASIN g n L. Balaton n o u c a Transsylvanian Basin H B Great Hungarian Plain e l Cluj t t 1 Trans i L 6 A Z Apuseni Mts. HUNGARY Drava Basin S 2 I T DRAVA Southern Al ps Mecsek Mts. 4 area under 3 Villany Mts. discussion SLOVENIA 5 Zagreb Tisza Southern Carpathians CROA TI A Slavonian Danube Sa Insel bergs va Basin ROMA NIA Moesian platfor m Beograd SERBIA 0 200 100 A Dinarides d r i a t i km c s e a Wolfgramm, 2006 12-15 Feb. 08 ENGINE Vilnius > 19

Supercritical reservoirs in Iceland Isor, 2007 12-15 Feb. 08 ENGINE Vilnius > 20

Georesource strategy > Explore new EGS concepts/targets • Ex. The limit between the post Paleozoic sedimentary cover and the basement in western Europe • Hidden granites, Oil/gas fields, border of conventional fields, …. • Improve tools for quantifying the geothermal potential • Combination with socio-economic needs > We need boreholes > We need EGS sites in various contexts 12-15 Feb. 08 ENGINE Vilnius > 21

Thickness of the sediments (Tesauro et al., 2006) 12-15 Feb. 08 ENGINE Vilnius > 22

Isogeothermal surface 22° of 200 ° C in Hungary 16° 19° 48° RIVER TISZA T İ R E F E K A L B UDAPEST Depth below see level of: 200 ° C rock 200 ° C rock 47° temperature temperature in the in the young E BALATON basement sediments 5500 m 5500 m L AK 5000 m 5000 m E B U N A 4500 m 4500 m D 46° 4000 m 4000 m 3500 m 3500 m Mesozoic (mainly Paleozoic (mainly Neogene volcanic Drillholes with carbonate) rocks crystalline) rocks rocks in near- measured temperatures 3000 m 3000 m in near-surface position in near-surface position surface position > 150 ° C From P. DÖVÉNYI (ELTE Budapest, Hungary) & L. RYBACH (GEOWATT AG Zürich, Switzerland), 2500 m Orléans ENGINE launching Conference, February 2006 12-15 Feb. 08 ENGINE Vilnius > 23