the egs soultz power plant - numov - geothermie... · and thanks to all scientific and technical...

The EGS Soultz power plant

2

Consortium

Private financing and operation

Public funding

Scientific partners

Our aim: Geothermal Production of Electricity

CreekplantGeysers, USA, 130 MWel

Nesjavellir, Island, 30 MWel

Prince PieroGinori Conti in Lardarello, Italien, at 1904: some light bulbs

Distribution of geothermal systems

Geothermal Systems consist of:

A heatsource

a permeable network of fissures

a heat transport medium, thermal water

Geothermal Systems

Natural fracture Support, ‘self propping effect’

Opening, shearingLocating of the fracture sound

Hydraulic Stimulation

The concept

600 m 600 m 200°C at 5000 m

GPK2 GPK3 GPK4

Geophone

Observation well

Sediments

Graniticbasement

1.5 MWe (+x MWe)

Dep

th [

m]30 l/s 30 l/s

Construction of a scientific and experimental pilot plant for geothermal power productionfrom crystalline formations.Large-scale permeability improvement by hydraulic stimulation.

7

2007 – 2009

Installation of a 1.5 MW power plant

• Design and construction of surface components (turbine, generator, heat exchangers, air cooling system…)

• Installation of a LSP in GPK2 at 250 m, ESP in GPK4 at 500 m depth

• VSP campaign (March-April 2007)

• First electricity production in June 2008

• Commissioning phase

• Test phase

1987 – 1991

Exploration

1991 – 1998

Doublet GPK1/GPK2

3600 m depth

1999 – 2007

Triplet GPK2/GPK3/GPK4

5000 m depth

• Drilling of GPK1 to 2000 m depth

• Coring of EPS1 to 2227 m depth

• Deepening of GPK1 to 3600 m depth and hydraulic stimulation

• Drilling of GPK2 to 3880 m depth and hydraulic stimulation

• Successful circulation between GPK1 and GPK2




• Circulation between GPK3 (injection), GPK2 and GPK4 (both production)

• Chemical stimulations of all wells

Project history

8

Project contract phases

Deep wells and stimulation29 M€

2001 Phase I 2005

2004 Phase II 2009

Construction of the power plant25 M€

2010 Phase III 2012

Scientific and technical follow-up5 M€

Project design and exploration phase

1010

-> Fractures with hydrothermal alteration, hints on geothermal system

-> Brine with 100 g TDS/l

Temperature profiles

Dep

th[m

]

Temperature [°C]

1987 – 1991

Exploration

• Drilling of GPK1 to 2000 m depth

• Coring of EPS1 to 2227 m depth

‚Upper reservoir‘

11

(Gérard et al., 2006)

Circulation in 1997

First circulation in a closed loop!

- 4 months

- 140 °C

- 10 MWth

- produced fluid contains 70 % brine, increasing salinity during circulation

- no significant seismicity during circulation and stimulation

11

1991 – 1998

Doublet GPK1/GPK2

3600 m depth



• Successful circulation between GPK1 and GPK2

12

200020032004

2005

Observations:- up to 20 fold improvement of productivity- mainly shearing processes- stimulated volume of about 3 km³

‚Deep reservoir‘

Technical developments:- extended drill bits life times- development of high temperature sealingsand packers (for stress measurements also)- floating casings for extreme temperaturechanges- prototypes of high temperature downhole tools for image logs

1999 – 2007

Triplet GPK2/GPK3/GPK4

5000 m depth




• Circulation between GPK3 (injection), GPK2 and GPK4 (both production)

• Chemical stimulations of all wells

Hydraulics and 3D structures

13

5 months circulation without production pumps:15 l/s, max. 160 °C

6 MWth

70 to 80 % of produced fluid is brinehydraulic imbalance GPK2 <-> GPK4

GPK4GPK2

(Sausse et al., 2008)

3D model of faults in reservoir based on borehole logs and VSP:-> one main faults connects GPK2 and GPK3

side view from west

north

dept

h

-2125-1625-1125-625-125375

3650

4150

4650

5150

5650

6150

50

100

150

200

250Seismic density – view from west

Dep

th[m

]

North

GPK4GPK2

GPK-3

574 m

Drill 24"

GPK-3

20" Casing 133 lbs./ft. X-56 BTC

574 m

Drill 24"

2424”” Drilling, 20Drilling, 20”” Surface Casing, Surface Casing, CementCement

GPK-3


574 m

Drill 24"

GPK-3

1447 m


574 m

Drill 24"

Drill 17 1/2"

GPK-3

1447 m


13 3/8" Casing 68 lbs./ft.

574 m

Drill 24"

Drill 17 1/2"

17 17 ½”½” Drilling, 13 3/8Drilling, 13 3/8”” Intermediate Intermediate Casing, CementCasing, Cement

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

12 12 ¼”¼” DrillingDrilling

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

Drill 12 1/4" Kick Off with 8 Kick Off with 8 ½”½” DHMDHM

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

Drill 12 1/4"

Drill with mudmotor 8 1/2" 2681 -3180 m

Reopening from 8 Reopening from 8 ½”½” to 12 to 12 ¼”¼”Drill with mudmotor 8 1/2"

2681 -3180 m

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

Drill 12 1/4"

Reopen from 8 1/2"directional to12 1/4" 12 12 ¼”¼” DrillingDrilling


12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

Drill 12 1/4"

Drill 12 1/4"

Reopen from 8 1/2"directional to12 1/4"


12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

5031 m TVD 5101 m MD

Drill 12 1/4"

Drill 8 1/2"

Drill 12 1/4"


8 8 ½”½” Drilling, SandDrilling, Sand


12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

5031 m TVD 5101 m MD

Drill 12 1/4"

Drill 8 1/2"

Drill 12 1/4"


9 5/8 Section 2 2279.6 m P110 43.5 #


9 5/8" Section 1 1041.5 m P110 47 #

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

5031 m TVD 5101 m MD

Drill 12 1/4"

Drill 8 1/2" Casing shoe at 4487 m TVD 4556 m MD

Drill 12 1/4"


9 5/8 Section 2 2279.6 m P110 43.5 #


9 5/8" Section 1 1041.5 m P110 47 #

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

1447 m



574 m

Drill 24"

Drill 17 1/2"

5031 m TVD 5101 m MD

Drill 12 1/4"


High Temperature HMR Cement

Drill 12 1/4"


Set the Set the ‘‘freefree’’ 9 5/89 5/8”” Casing, HMRCasing, HMR--Cementation, Set Cementation, Set CuNiCuNi PackersPackers

9 5/8 Section 2 2279.6 m P110 43.5 #


9 5/8" Section 1 1041.5 m P110 47 #

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

2 10" Inflatable CuNi Packers

1447 m



574 m

Drill 24"

Drill 17 1/2"

5031 m TVD 5101 m MD

Drill 12 1/4"



Drill 12 1/4"


Clean The Open HoleClean The Open Hole

9 5/8 Section 2 2279.6 m P110 43.5 #


9 5/8" Section 1 1041.5 m P110 47 #

12 1/4" hole to 4511 m TVD 4580 m MD

GPK-3

2 10" Inflatable CuNi Packers

1447 m



574 m

Drill 24"

Drill 17 1/2"

5031 m TVD 5101 m MD

Drill 12 1/4"



Drill 12 1/4"


constructing der central Injektion‐bore hole GPK3

‘‘FreeFree’’ 9 5/89 5/8””CasingCasing

CellarCellar

Pack Off Pack Off

200200oo C & 200 barC & 200 bar

RiserRiser

ValvesValves

Packing of the free casing at the wellhead

1 2 3 4a 4b90.000 Events recorded

M 2.9

Hydraulic Stimulation GPK3

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Inje

ctiv

ity/P

rodu

ctiv

ity in

dex

[l/(s

*bar

)]

Natural Injectivity / ProductivityHydraulic StimulationHClRMANTAOCA

GPK2 GPK3 GPK44%

76%

20%

GPK2

53%32%

8%8%

GPK3

2%

50%

8%13%

27%

GPK4

Status of wells prior to power production

17

Dimensioning of the power plant:

- production from GPK2 with a production pump - expected production is about35 l/s at 175 °C- Net power of 1.5 MWel

Nami et al., 2008

Construction and testing phase

1818

2007 – 2009

Installation of a 1.5 MW power plant

• Design and construction of surface components (turbine, generator, heat exchangers, air cooling system…)

• Installation of a LSP in GPK2 at 250 m, ESP in GPK4 at 500 m depth

• VSP campaign (March-April 2007)

• First electricity production in June 2008

• Commissioning phase

• Test phase

Design of power plant

19

Condenser

Evaporator

Preheater

G

Turbine

Generator

Pump

Regenerator

Gearbox

GPK3GPK2 GPK4

Line shaft punp at 350 m

ORC installation working with Isobutane

Thermal loop

GPK2/GPK3

Overview of activities in 2008

20

GPK4 ESPGPK2 LSP

2008 April Mai Juni Juli Aug. Sept Oct Nov DecTests

LSP installation at 350 m in GPK2

1. kWh!

25 l/s163 °C

25 l/s162 °CPout 19 barPinj 70 bar

Broken shaft

LSP in 250 m

New lubricationsystem

15 l/s163 °C

T

12 l/s155 °C

ESP at 500 min GPK4 Bypass for

corrosion analysis

LSP analysis

Materials research

21

-> shaft failure due to friction and subsequentoverheating

-> erosion atimpellers

-> in-situ corrosion testing, test of inhibitors, online measurement of pH, T, redox potential, electricalconductivity

22

Corrosion analysis

P110 and N80 (Casings)

P265GH (surface lines)

Nominal composition of investigated steel samples:

(Baticci, 2009)

Line shaft pump in GPK2

23

• Installation depth: 350 m• max. power ~ 300 kW

Electric submersible pump in GPK4

24

Installation depth 500 m

Max. power ~ 300 kW

Geothermal activity in 2009

20l/s164°C

OctSep2009

GPK1

GPK2

GPK3

GPK4

DecNovAugJulJunMaiAprMarFebJan

LSP

ESP

Re-inj

Prod

Production

Re-inj

CleaningHeat Exchanger

ReparationAir cooler

Re-injection

R

Production

12l/s152°C

Cleaning ofHeat exchanger

Electricaldefect

ReparationOf fans

Tracer experim. GPK3-GPK2

LSP expertise

Preparation GPK1

GPK4 : 9l/s 147°CGPK3 : 11l/s 73°CGPK2 : 22l/s 156°CGPK1 : 18l/s 70°C

R

Prod

Mai

nten

ance

R

R

P

Acitivities in the next ‚Phase III‘

Starting Phase III: a 3 year program for a scientific and technical monitoring of the power plant with French and German funding

Reservoir: microseismicity, thermal monitoring, hydro‐chemical behaviour, tracer studies

Environmental monitoring: radioprotection, vibration study, noise,

Technological studies: Production pumps, Corrosion and Scaling

Summary and outlook

27

Actual status:

-> Circulation of the reservoir with production pumps has beensuccesfully demonstrated several times-> Components have been extensively tested-> A circulation with tracer investigation was performed and isunder evaluation-> The pilot plant is ready for the resumption of test operationsand acceptance-> reinjection into GPK1 tested

Start of Phase III with power production!

Feed‐in tarif

28

Feed-in tarif in France:

At the moment,l 12 ct/kWh are paid on the net power.

Increase to > 20 ct/kWh on net power is agreed fromall partners and contracts will be signed in the firstquarter of 2010..

Thank you for your attention!

And thanks to all scientific and technical partners in the Soultz projectand to the funding institutions BMU, ADEME und EU

as well as to the EEIG ‘Heat mining’.

29

Circulation 2008, 1. part

30

6 weeks of test circulation in 2008:

- max. production from GPK2 is25 l/s

- production temperature max. 165 °C

-> thermal power ~ 11 MWth

Seismicity not significant!

31

Circulation 2008, 2. part

3 weeks of test circulation in 2008:

- GPK2 16 l/s, 163 °C

- GPK4 12 l/s, 155 °C

-> thermal power ~ 12 MWth

Seismicity not significant!

OCA stimulation for GPK3 – for high temperature sandstone formations or formationswith more than 5 % zeolite or chlorite. Was tested on GPK3 cutting samples.Preflush ~ 1200 m³ of fresh water at 35 l/s (GPK4 30 l/s)Main flush of 250 m³ OCA: 5 – 10 % citric acid C6H8O7, 0.1 – 1 % HF, 0.5 – 1.5 % HBF4, 1 – 5 % NH4Cl at 55 l/s (in weight: 10 – 20 t citric acid, 0.2 – 2 t HF, 1-3 t HBF4, 2 – 10 t NH4Cl)Postflush ~ 1300 m³ of fresh water with flow rates of 45 and 30 l/s (GPK4 40 and 35 l/s)

RMA stimulation for GPK4 – hydrothermal deposits like carbonates and clayPreflush of 2000 m³ fresh water at steps of 18, 22 and 28 l/sPreflush of HCl, 25 m³ at concentration of 15 % (deox.) at 22 l/s (3 t)Main flush of 200 m³ RMA, 12 % HCl and 3 % HF plus inhibitor at 22 l/s (24 t HCl & 6 t HF)Postflush of 2000 m³ fresh water at 22 and 28 l/s

NTA stimulation for GPK4 – strong chelating capacity with respect elements like Ca, Mg, Fe and other metalsChelatants form complexes with cations like Fe, Ca, Mg, and Al and dissolve calcite etc…C6H9NO6 -- Nitrilotriacetic acid.Preflush (to pressurize reservoir??) of 4500 m³ at 24 l/sMain flush of 200 m³ of caustic soda and 19 % diluted Na3NTA at 35 l/s (38 t)Postflush of 400 m³ fresh water at 40 l/s

More about chemical stimulations….

the egs soultz power plant - numov - geothermie... · and thanks to all scientific and technical...

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