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Philip KLINGLER 28 Octobre 2010

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1 Philip KLINGLER 28 Octobre 2010
Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Titel oben Vollbild Philip KLINGLER Octobre 2010 1

2 Gravity forward modelling Conclusions
Topics Introduction Tracer-test 3D-model Imaginary faults… Gravity forward modelling Conclusions Themen: Vorversuche Markierversuch 3D-model Gravity forward modelling 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

3 Introduction Objective of the study
… was to characterise the geological and hydrogeological setting to determine effects of an increase in production rate from the project “Riehen Plus”. RiehenPlus Cooperation of distant heating systems of the township Riehen, Niederholz AG und Wasserstelzen (IWB) linked with an increase in production from18 l/s to 23 l/s grösser 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

4 Introduction Dublet heating system (D = 960 m) Running since 1994
Riehen 1 Dublet heating system (D = 960 m) Running since 1994 Production well Riehen 1: Depth = 1547 m (Muschelkalk) Temperature = 65°C Injection well Riehen 2: Depth = 1247 m (Muschelkalk) Temperature = 52.2°C Pressure interaction ocurred during pumping tests [Hauber et al., 1989] Riehen 2 960 m Dublettenanlage Kreislauf beschreiben! Druckverbindung Ziel Riehen Plus After Hauber et al. [1989]

5 Tracer-test 27 Novembre 2009 6 Min!!!! Andere Skala im Excel Ohne Verbindungslinie Fliessverbindung zwischen RB2 nach RB1 mit Tracerversuch nicht nachgewiesen. Piek nicht möglich, weil zu kleine Dispersion Schlussfolgerung: Keine Ankunft = positives Ergebnis!!!! Weiterleitung zu 3D Injection: 10 kg Uranine in solution (1000 l) on 3 Novembre 2009 No fluid circulation ocurred during the tracer test Sample 27 Novembre 2009 = Contamination

6 Tracer-test Hypothesis 1 “parallel”
A regional groundwater system flowing from the south to the north hinders the circulation of the thermal water. 1 1 2 2 Hypothesis 2 “in line” The reservoir has been separated by the fault of “Weil am Rhein”. The existing hydraulic connection is distant, the majority of the thermal water flows through the doublet heating system, which may have enforced a new groundwater flow system.

7 A few thoughts about hydraulics
Tracer-test A few thoughts about hydraulics Possible flow patterns of a doublet in a homogenous aquifer with a groundwater flow from extraction to in injection well [Strack1989]. c a b

8 3D model Objective Discretisation of the regional 3D geology of the reservoir to characterise the geological and hydrogeological setting Methods Compilation of all available geological information into a 3D model Ziel: Charakterisierung!!! Vorgehen weglassen Perimeter: 30 km x 23 km Coordinates (CH1903): xmin: m xmax: m ymin: m ymax: m zmin: m o. s. zmax: Surface 28 Octobre 2010 Philip Klingler

9 3D model Available data:
Surface: SRTM-Daten (Shuttle Radar Topography Mission – US Geological Survey) Bild Vergrössern!!! In mehreren Folien!! 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

10 3D model Available data Geological sections: 1. „Gürler- sections“ [Gürler et al., 1987] 2. Annotations to Map Basel [Fischer et al., 1971] 3. Annotations to Map Arlesheim [Bitterli-Brunner & Fischer1988] 4. Drilling report on Riehen [Hauber et al.1989] Bild Vergrössern!!! In mehreren Folien!! [Hauber et al.1989] [Gürler et al.1989] [Fischer et al.1989] 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

11 3D model Available data Geological maps:
Map 1047 Basel, 1:25‘000 [Fischer et al., 1971] Map 1067 Arlesheim, 1:25‘000 [Bitterli-Brunner & Fischer, 1988] Geologische Karte der zentr. Nordschweiz 1: [Müller et al.] Well data: 13 Geothermal wells 5 Salt wells(NaCl, KCl) Bild Vergrössern!!! In mehreren Folien!! 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

12 3D model Available data 3D models: GKW model [Schill et al., 2010]
Geological 3D model Riehen (GoCad), 4x4 km [Dresmann, 2010] Bild Vergrössern!!! In mehreren Folien!!

13 3D model Formations and series A B A C D E F B: 680 m C:130 m D: 80 m
Links weglassen, stattdessen Mächtigkeiten & Formationsnamen Serien & Formationen erläutern E F B: 680 m C:130 m D: 80 m E: 180 m F

14 3D model Major faults Minor faults Infinite Finite ellipse
Constant displacement Termination only possible on other faults or on model boundries Finite ellipse Hor., vert. & influence radius Max. displacement in centre, no displacement at edge

15 3D model Imaginary faults Definition:
Imaginary faults are finite faults with a very big vertical radius (>5 x vertical extent) linked with an imaginary formation and have no effects on the geological formations. fault y fault z fault x imaginary fault stop! An imaginary fault, which separates fault x and z will terminate fault y too… The hor. radius has to be large enough, that the infinite faults won’t continue in the depth

16 Formation top crystalline basement
3D model Formation top crystalline basement 10 Min!!! Kurz Grössere Strukturen erwähnen 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

17 Formation top anhydrite zone
3D model Formation top anhydrite zone 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

18 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk Und jetzt drehe ich das model…. 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

19 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

20 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

21 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

22 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

23 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

24 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

25 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

26 Formation top upper Muschelkalk
3D model Formation top upper Muschelkalk 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

27 3D model Formation top Keuper
28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

28 3D model Formation top Malm
28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

29 All formations with tertiary
3D model All formations with tertiary 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

30 3D model Main characteristics
Crystalline basement und Paleozoic sediments (Permian, Carboniferous) as undifferentiated homogenous unit Inhomogenous Data distribution: Very little information available in NE Imaginary faults and formations with no effect on the model to terminate infinite faults Rounded structures instead of abrupt boundries Vereinfachte Version des Basler models mit folgenden Merkmalen Evtl am Anfang 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

31 Gravity forward modelling
Definitions Gravity anomaly: The local deviation from the theoretical value of the gravity on the surface of a homogenous reference ellipsoid (e.g. WGS 84) Bouguer anomaly: The effects of the gravity anomaly that have been caused by different densities in the underground 14 Min!!! g- gt +Korrekturen (Freiluft & Topografie) dargestellt in in folgender Formel Unten Text begrenzen

32 Gravity forward modelling Calculation of the Bouguer anomaly
On the basis of absolute gravity values g from Swiss, German and French gravity stations the Bouguer anomaly was calculated with following formula: 14 Min!!! g- gt +Korrekturen (Freiluft & Topografie) dargestellt in in folgender Formel Unten Text begrenzen + Measured gravity Theoretical gravity value of reference ellipsoid Free air correction (altitude) Surface correction

33 Gravity forward modelling
Bouguer anomaly The increasing negative anomaly towards the south originates from the alpine depression of the Moho

34 Gravity forward modelling
Residuals [1] Positive anomaly in N [2] Negative anomaly in S [3] Inhomogenous Zone in SE [4] Riehen in area with strong change in gravity [5] Sediments and faults of the Upper Rhine Graben 1 1 4 Butterworth-Filter!!! 5 2 3

35 Gravity forward modelling Forward modelling with Geomodeller
Grösse

36 Gravity forward modelling Misfit of forward modelling with Residuals
Strong misfit in north (positive) and in south (negative) Possible Explanations Permo Carboniferous Igneous Intrusions Old tectonic Struktures in basement

37 Gravity forward modelling
Dotted Lines = Permocarboni-ferous trenches according to Ustazewsky [2004]

38 Résumé No fluid circulation occurred during the tracer test.
Two different models of a regional flow system have been proposed to explain the absence of fluid circulation during the tracer test The infinite fault network in Geomodeller had to be modelled with imaginary faults The comparison of the forward modelling with the residuals show that current geological concepts agree only in part with the gravimetric field results. There is a strong change in gravity in the area of the geothermal reservoir of Riehen. Pt. 1 bis 3 zu Ende Markierversuch Schlussfolgerung in 3 Sätzen. 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

39 Bibliography SRTM-Daten: Daten der Shuttle Radar Topography Mission. US Geological Survey. Adams, M. C. & Davis, J., Kinetics of Fluorescein Decay and its Application as a Geothermal Tracer. In: Geothermics, Vol. 20: 53-66 Aug, C., Modélisation Géologique 3D et Characterisation des Incertitudes par la Méthode du Champ de Potentiel. PhD, ENSMP, Paris. Bitterli-Brunner, P. & Fischer, H., Erlauterungen zum Geologischen Atlas der Schweiz 1:25000, Map 1067 Arlesheim, 66 pp., Landeshydrologie und -geologie. Dresmann, H., Datenlieferung an die Universität Neuenburg: GoCad-model, 4x4 km. Angewandte und Umweltgeologie, Universität Basel. Baugrundarchiv (BGA), Riehen 20, 23. Februar 2010. Fischer, H., Hauber, L. & Wittmann, O., Erläuterungen zum Geologischen Atlas der Schweiz, 1:25000, Map 1047 Basel, Landeshydrologie und -geologie. Hauber, L., Brumann, O., Schneider, A., Vögtli, B. & Wittwer, H., Geothermische Tiefbohrungen Riehen 1 und 2; Geologischer und Technischer Bericht. Baudepartement Basel – Stadt, Gemeinde Riehen. Gürler B., Hauber L. & Schwander M., Die Geologie der Umgebung von Basel. Beiträge zur Geologischen Karte der Schweiz. Laujanie, C., Courrioux, G., & Manuel, L Foliation Fields and 3D Cartography in Geology: Principles of a Method Based on Potential Interpolation. Mathematical Geology, 29, 571–584. Müller, W.H., Huber, M., Isler, A. & Kleboth, P., Geologische Karte der zentralen Nordschweiz 1: mit Erläuterungen. Nagra NTB 84–25. Signorelli, S. & Kohl, T., Geothermischer Ressourcenatlas der Nordschweiz - Gebiet des nördlichen Schweizer Mittellandes. Schweizerische Geophysikalische Kommission (Beiträge zur Geologie der Schweiz: Geophysik, Nr. 39). Putz, M., Stüwe, K., Jessel, M., & Calcagone, P., Interpreting Stage Warping Events Using 3D Simulation: An Example from the Plattengneis Shear Zone, Eastern Alp. Bolletino di Geofisica Teorica ed Applicata (GeoMod Proceedings), 45, 126–182.

40 Thank you for your attention!
28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler

41 Aufbau Abb.: Residuals mit einem Butterworth-Filter mit einer Grenzwellenlänge von 50 km. Gräulich überzogen sind die Gebiete, wo sich gemäss Ustazewsky [2004] Permokarbon-Tröge befinden sollten. Ihre Isopachen sind mit der den gepunkteten Linien erkennbar. 28 Octobre 2010 Characterisation of the geothermal reservoir Riehen: 3D structure and tracer-test Philip Klingler


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