THE DEEP HEAT MINING PROJECT Status February 2006 by Robert J. - - PowerPoint PPT Presentation

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THE DEEP HEAT MINING PROJECT Status February 2006 by Robert J. - - PowerPoint PPT Presentation

Jan 23, 2024 203 likes •424 views

THE DEEP HEAT MINING PROJECT Status February 2006 by Robert J. Hopkirk 1 & Markus O. Hring 2 DEEP HEAT MINING Association (CH-8162 Steinmaur) 1 Polydynamics Engineering, CH-8708 Mnnedorf 2 Hring Geo-Project. CH-8162 Steinmaur M.O.

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M.O. Häring, R.J. Hopkirk 2006

THE DEEP HEAT MINING PROJECT

Status February 2006

by

Robert J. Hopkirk 1 & Markus O. Häring

2

DEEP HEAT MINING Association (CH-8162 Steinmaur)

1 Polydynamics Engineering, CH-8708 Männedorf 2 Häring Geo-Project. CH-8162 Steinmaur

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M.O. Häring, R.J. Hopkirk 2006

DHM PILOT PROJECT

The DHM Association was set up at the request of the Federal Office of Energy (FOE) and started work in 1996, a Swiss R & D group having been

active already then for 20 years. It defined and undertook the following tasks:

  • It would discover how feasible EGS now really was .............. and if it might

probably become useful in Switzerland.

  • If yes, it would find several possible EGS sites and choose one for a pilot plant,
  • It would initiate, obtain finance for and plan this first pilot plant, ensuring that EGS

technology has the best possible chance to prove itself.

  • If the technology proves itself, DHMA would continue to promote it and to

encourage the necessary R & D and the motivation of young specialists.

The FOE would provide “seeding money” for these tasks. Power plant construction and operation must be financed from private sources.

2.

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M.O. Häring, R.J. Hopkirk 2006

SITE SELECTION

Criteria for site selection for the PILOT PLANT:

  • Do the local utilities and population need its energy production and do they

welcome the plant in their midst?

  • Are the geological and geothermal conditions as favourable as they can be

to maximize the chance of success?

  • Is land available?
  • Is water available?
  • Will the project be environmentally acceptable in construction and in
  • peration?

3.

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M.O. Häring, R.J. Hopkirk 2006

SITE SELECTION - superposed maps of site-critical parameters:

geology, crustal thickness and regions of large scale heat demand

4.

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M.O. Häring, R.J. Hopkirk 2006

SITE SELECTION - Heat flow map

Data from: “Geothermal map of Switzerland”, Medici & Rybach 1995

5.

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M.O. Häring, R.J. Hopkirk 2006

SIGNIFICANT DECISIONS

IN ORDER TO HELP MAKE EGS MORE ATTRACTIVE EVEN AT THE PILOT STAGE : 1. To aim for co-generation of electrical energy and heat to ensure greater income 2. To use a hybrid surface plant if possible, combining geothermal and other sources These two decisions point to Basle as first and Geneva as second choice

  • Both have expanding District Heating networks currently:

– Basle: covering a maximum demand already over 300MW – Geneva: covering a maximum demand of ca. 45MW

  • Both offer additional energy sources (eg. incineration plants)
  • Aims for GEOTHERMAL generation alone in the first pilot plant:

– 3MW(e) & 20 MW(th)

6.

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M.O. Häring, R.J. Hopkirk 2006

Two sites in the Rhine graben

EU Project Soultz-sous-forêts DEEP HEAT MINING Project, Basel

7.

Some similarities are likely between these two sites

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M.O. Häring, R.J. Hopkirk 2006

SITE SITUATION

E-W section across the southern Rhine Graben

seismic data from Bonjer 1997 8.

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M.O. Häring, R.J. Hopkirk 2006

DEEP HEAT MINING Basel

  • geothermal power plant using EGS technology

for co-generation of electricity and heat

  • electricity und heat for 5'000 households:
  • 20 MW thermal power
  • 3 MW electrical power
  • annual reduction of CO2 emissions:
  • 40'000 t

5 - 6 km 1 - 1.5 km

stimulated Fracture system Monitoring w ell Heat exchanger

9.

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M.O. Häring, R.J. Hopkirk 2006

DHM Basel - how it fits in

Monitoring Station Otterbach

DHM Pilot Plant Kleinhüningen

Monitoring Station

  • St. Johann

District heating grid

Minimum target output:

  • geothermal power plant using EGS

technology for co-generation of electricity and heat for 5'000 households:

  • 20 MW thermal power
  • 3 MW electrical power
  • annual reduction of CO2 emissions 40 kt/a

Desired rock heat exchanger:

  • Initial rock temperature 200 - 230°C
  • Probable depth 5-6 km
  • Three-well unit system - well spacing at

bottom-hole 700 - 1000 m

10.

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M.O. Häring, R.J. Hopkirk 2006

Project plan

Power plant construction

2009 6

Development & Construction

3rd deep well System stimulation and testing

2008 5

Circulation testing

2007 4

2nd deep well Monitoring System & 1st deep well to 5‘000 m +

2006 2

Exploration

Pre-project studies & pilot hole, assuring finance & permissions

2001 1 3

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M.O. Häring, R.J. Hopkirk 2006

Exploration Concept

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M.O. Häring, R.J. Hopkirk 2006

Financial Risk Management

high risk level low risk level

Mio CHF

Exploration phase Construction phase Milestones

10 20 30 40 50 60 70 80 90

1 2 3 5 4 6

13.

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M.O. Häring, R.J. Hopkirk 2006

Geothermal & monitoring well sites

14.

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M.O. Häring, R.J. Hopkirk 2006

Vertical Seismic Profile (VSP) in OT2 Dec. 2004

15.

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M.O. Häring, R.J. Hopkirk 2006

First indications of Basement stress field orientation

induced fractures

Monitoring well Otterbach 2

main Rhinegraben flexure

induced breakouts

16.

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M.O. Häring, R.J. Hopkirk 2006

The main site at Kleinhüningen

Summer 2004 - Before site preparation January 2006 - concreting rig foundation 17.

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M.O. Häring, R.J. Hopkirk 2006

DHM Basel - some more numbers

Exploration phase: 2 geothermal wells 5’000 - 6‘000 m 3 new monitoring wells 250 - 600 m 3 monitoring stations in existing holes 600 - 2‘750 m Main (geothermal) wells: April 2006 - November 2007 All monitoring wells but one are complete Instrumentation is being tested & installed Budget limit for exploration phase:

  • ca. 60 Mio CHF = Risk capital

Budget estimate for entire pilot plant:

  • ca. 100 Mio CHF

KCA-Deutag T45 Drill Rig

18.

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M.O. Häring, R.J. Hopkirk 2006

Vision for the future: Swiss EGS power plants

Up to several tens of plants by 2050

  • varying sizes, varying depths according to site characteristics and local

energy demands .......

  • Heat exchanger depth ranges

4

  • 7

km

  • Source temperatures

150

  • 250

°C

  • Number of wells per site

3

  • 20
  • Power outputs from geothermal energy alone
  • if for el. generation only

5

  • 40

Mwe (i.e.: without hybrid cycles)

  • if for heat production only

30

  • 200

MWth

  • Specific Investment

2

  • 3

Mio CHF/MW installed

  • Generating costs
  • electrical energy

0.1

  • 0.2

CHF/kWh

  • heat

0.03

  • 0.06

CHF/kWh

  • CO2- Reduction (heat prod. only)

10

  • 200

kt/a

19.

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M.O. Häring, R.J. Hopkirk 2006

Closing remarks - a caution

Use of EGS technology outside geothermal anomalies is itself still a vision Nothing is certain until EGS is proven to be commercially viable Several successful pilot plants are needed so that: underground heat exchangers can be created

  • at any promising site;
  • of the right size to fulfill a local energy demand.

Much depends upon “getting it right first time” in these pilot plants and DHM Basel is one of these - for Switzerland it is all-important. Only then can EGS become accepted as an Available Energy Source

20.

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M.O. Häring, R.J. Hopkirk 2006

THE END

Thank you for your patience and attention!

For the current status of DHM Basel see www.geothermal.ch For other aspects see www.dhm.ch

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