Philip KLINGLER28 Octobre 2010 Characterisation of the
geothermal reservoir Riehen: 3D structure and tracer-test Slide 2
28 Octobre 2010 Characterisation of the geothermal reservoir
Riehen: 3D structure and tracer-test Topics 1.Introduction
2.Tracer-test 3.3D-model 4.Imaginary faults 5.Gravity forward
modelling 6.Conclusions Philip Klingler Slide 3 28 Octobre 2010
Characterisation of the geothermal reservoir Riehen: 3D structure
and tracer-test Introduction Philip Klingler 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
Slide 4 Dublet heating system (D = 960 m) Running since 1994
Production well Riehen 1: Depth = 1547 m (Muschelkalk) Temperature
= 65C Injection well Riehen 2: Depth = 1247 m (Muschelkalk)
Temperature = 52.2C Pressure interaction ocurred during pumping
tests [Hauber et al., 1989] 960 m Riehen 1 Riehen 2 After Hauber et
al. [1989] Introduction Slide 5 Tracer-test 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 27 Novembre 2009 Slide 6 Hypothesis 1 parallel A
regional groundwater system flowing from the south to the north
hinders the circulation of the thermal water. 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. Tracer-test 1 1 22
Slide 7 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]. a b c Tracer-test
Slide 8 28 Octobre 2010 Philip Klingler 3D model Perimeter: 30 km x
23 km Coordinates (CH1903): xmin: 600843 mxmax: 630843 m ymin:
255694 m ymax: 278694 m zmin: -8000 m o. s.zmax: Surface Methods
Compilation of all available geological information into a 3D model
Objective Discretisation of the regional 3D geology of the
reservoir to characterise the geological and hydrogeological
setting Slide 9 28 Octobre 2010 Characterisation of the geothermal
reservoir Riehen: 3D structure and tracer-test Philip Klingler 3D
model Available data: Surface: SRTM-Daten (Shuttle Radar Topography
Mission US Geological Survey) Slide 10 28 Octobre 2010
Characterisation of the geothermal reservoir Riehen: 3D structure
and tracer-test Philip Klingler 3D model Available data Geological
sections: 1. Grler- sections [Grler et al., 1987] 2. Annotations to
Map 1047 Basel [Fischer et al., 1971] 3. Annotations to Map 1067
Arlesheim [Bitterli-Brunner & Fischer1988] 4. Drilling report
on Riehen [Hauber et al.1989] [Hauber et al.1989] [Grler et
al.1989] [Fischer et al.1989] Slide 11 28 Octobre 2010
Characterisation of the geothermal reservoir Riehen: 3D structure
and tracer-test Philip Klingler 3D model Available data Geological
maps: 1.Map 1047 Basel, 1:25000 [Fischer et al., 1971] 2.Map 1067
Arlesheim, 1:25000 [Bitterli-Brunner & Fischer, 1988]
3.Geologische Karte der zentr. Nordschweiz 1:100 000 [Mller et al.]
Well data: 1.13 Geothermal wells 2.5 Salt wells(NaCl, KCl) Slide 12
3D model Available data 3D models: GKW model [Schill et al., 2010]
Geological 3D model Riehen (GoCad), 4x4 km [Dresmann, 2010] Slide
13 3D model Formations and series E: 180 m D: 80 m C:130 m B: 680 m
F A A B C D E F Slide 14 3D model Major faultsMinor faults Infinite
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 Slide
15 The hor. radius has to be large enough, that the infinite faults
wont continue in the depth 3D model Imaginary faults fault y fault
z fault x fault y imaginary fault stop! 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. An imaginary fault, which
separates fault x and z will terminate fault y too Slide 16 28
Octobre 2010 Characterisation of the geothermal reservoir Riehen:
3D structure and tracer-test Philip Klingler 3D model Formation top
crystalline basement Slide 17 28 Octobre 2010 Characterisation of
the geothermal reservoir Riehen: 3D structure and tracer-test
Philip Klingler 3D model Formation top anhydrite zone Slide 18 28
Octobre 2010 Characterisation of the geothermal reservoir Riehen:
3D structure and tracer-test Philip Klingler 3D model Formation top
upper Muschelkalk Slide 19 28 Octobre 2010 Characterisation of the
geothermal reservoir Riehen: 3D structure and tracer-test Philip
Klingler 3D model Formation top upper Muschelkalk Slide 20 28
Octobre 2010 Characterisation of the geothermal reservoir Riehen:
3D structure and tracer-test Philip Klingler 3D model Formation top
upper Muschelkalk Slide 21 28 Octobre 2010 Characterisation of the
geothermal reservoir Riehen: 3D structure and tracer-test Philip
Klingler 3D model Formation top upper Muschelkalk Slide 22 28
Octobre 2010 Characterisation of the geothermal reservoir Riehen:
3D structure and tracer-test Philip Klingler 3D model Formation top
upper Muschelkalk Slide 23 28 Octobre 2010 Characterisation of the
geothermal reservoir Riehen: 3D structure and tracer-test Philip
Klingler 3D model Formation top upper Muschelkalk Slide 24 28
Octobre 2010 Characterisation of the geothermal reservoir Riehen:
3D structure and tracer-test Philip Klingler 3D model Formation top
upper Muschelkalk Slide 25 28 Octobre 2010 Characterisation of the
geothermal reservoir Riehen: 3D structure and tracer-test Philip
Klingler 3D model Formation top upper Muschelkalk Slide 26 28
Octobre 2010 Characterisation of the geothermal reservoir Riehen:
3D structure and tracer-test Philip Klingler 3D model Formation top
upper Muschelkalk Slide 27 28 Octobre 2010 Characterisation of the
geothermal reservoir Riehen: 3D structure and tracer-test Philip
Klingler 3D model Formation top Keuper Slide 28 28 Octobre 2010
Characterisation of the geothermal reservoir Riehen: 3D structure
and tracer-test Philip Klingler 3D model Formation top Malm Slide
29 28 Octobre 2010 Characterisation of the geothermal reservoir
Riehen: 3D structure and tracer-test Philip Klingler 3D model All
formations with tertiary Slide 30 28 Octobre 2010 Characterisation
of the geothermal reservoir Riehen: 3D structure and tracer-test
Philip Klingler 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 Slide 31 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 Gravity
forward modelling Definitions Slide 32 On the basis of absolute
gravity values g from Swiss, German and French gravity stations the
Bouguer anomaly was calculated with following formula: Gravity
forward modelling Calculation of the Bouguer anomaly Measured
gravity Free air correction (altitude) Surface correction
Theoretical gravity value of reference ellipsoid + Slide 33 Gravity
forward modelling Bouguer anomaly The increasing negative anomaly
towards the south originates from the alpine depression of the Moho
Slide 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 5 4 1 3 2 Slide 35 Gravity
forward modelling Forward modelling with Geomodeller Slide 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
Slide 37 Gravity forward modelling Dotted Lines = Permocarboni-
ferous trenches according to Ustazewsky [2004] Slide 38 28 Octobre
2010 Characterisation of the geothermal reservoir Riehen: 3D
structure and tracer-test Philip Klingler Rsum 1.No fluid
circulation occurred during the tracer test. 2.Two different models
of a regional flow system have been proposed to explain the absence
of fluid circulation during the tracer test 3.The infinite fault
network in Geomodeller had to be modelled with imaginary faults
4.The comparison of the forward modelling with the residuals show
that current geological concepts agree only in part with the
gravimetric field results. 5.There is a strong change in gravity in
the area of the geothermal reservoir of Riehen. Slide 39
Bibliography SRTM-Daten: Daten der Shuttle Radar Topography
Mission. US Geological Survey. http://seamless.usgs.gov Adams, M.
C. & Davis, J., 1991. Kinetics of Fluorescein Decay and its
Application as a Geothermal Tracer. In: Geothermics, Vol. 20: 53-66
Aug, C., 2004. Modlisation Gologique 3D et Characterisation des
Incertitudes par la Mthode du Champ de Potentiel. PhD, ENSMP,
Paris. Bitterli-Brunner, P. & Fischer, H., 1988. Erlauterungen
zum Geologischen Atlas der Schweiz 1:25000, Map 1067 Arlesheim, 66
pp., Landeshydrologie und -geologie. Dresmann, H., 2010.
Datenlieferung an die Universitt Neuenburg: GoCad-model, 4x4 km.
Angewandte und Umweltgeologie, Universitt Basel. Baugrundarchiv
(BGA), Riehen 20, 23. Februar 2010. Fischer, H., Hauber, L. &
Wittmann, O., 1971. Erluterungen zum Geologischen Atlas der
Schweiz, 1:25000, Map 1047 Basel, Landeshydrologie und -geologie.
Hauber, L., Brumann, O., Schneider, A., Vgtli, B. & Wittwer,
H., 1989. Geothermische Tiefbohrungen Riehen 1 und 2; Geologischer
und Technischer Bericht. Baudepartement Basel Stadt, Gemeinde
Riehen. Grler B., Hauber L. & Schwander M., 1987. Die Geologie
der Umgebung von Basel. Beitrge zur Geologischen Karte der Schweiz.
Laujanie, C., Courrioux, G., & Manuel, L. 1997. Foliation
Fields and 3D Cartography in Geology: Principles of a Method Based
on Potential Interpolation. Mathematical Geology, 29, 571584.
Mller, W.H., Huber, M., Isler, A. & Kleboth, P., 1984.
Geologische Karte der zentralen Nordschweiz 1:100 000 mit
Erluterungen. Nagra NTB 8425. Signorelli, S. & Kohl, T., 2006.
Geothermischer Ressourcenatlas der Nordschweiz - Gebiet des
nrdlichen Schweizer Mittellandes. Schweizerische Geophysikalische
Kommission (Beitrge zur Geologie der Schweiz: Geophysik, Nr. 39).
Putz, M., Stwe, K., Jessel, M., & Calcagone, P., 2004.
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.
Slide 40 28 Octobre 2010 Characterisation of the geothermal
reservoir Riehen: 3D structure and tracer-test Philip Klingler
Thank you for your attention! Slide 41 28 Octobre 2010
Characterisation of the geothermal reservoir Riehen: 3D structure
and tracer-test Aufbau Philip Klingler Abb.: Residuals mit einem
Butterworth-Filter mit einer Grenzwellenlnge von 50 km. Grulich
berzogen sind die Gebiete, wo sich gemss Ustazewsky [2004]
Permokarbon-Trge befinden sollten. Ihre Isopachen sind mit der den
gepunkteten Linien erkennbar.
