GEOTHERMAL DISTRICT HEATING - GDHTHE PARIS BASIN CASE

A THIRTY YEAR EXPERIENCE

Sour

ce: G

PC, 2

010

New Doublets (2009/2011)New Doublets (2009/2011)

DEVELOPMENT STATUS

Location map

Geothermal district heating typical system design Geothermal loop monitored parameters

Productionwell

Injectionwell

GHX

PP IP

BUB

3WVGCP

Ppro Tpro

TipPip

PopTop

TosPos

PisTis

T injP inj

(Primary)

Heating grid(Secondary)

Data requirementsGeothermal loopPressures TemperaturesPpro Tpro#TipPip Tinj#TopPop FlowratePinj Qg

Geothermal loopPressures TemperaturesPis TisPos TosFlowrate Q

Heat exchanger thermal balanceQg=(Tip-Top)=Qhg(Tos-Tis)

Geological setting

source: ADEME, BRGM

Operating GDH grids 35 Systems operating to date15 serviced by GPC IP

Target Achieved Forecast(1985) 1990 2000 2010

Operating doublets 55 43 34 37Total installed capacity (MWt) 360 260 227 220Produced heat (GWht/yr) 2,000 1,455 1,240 1,200Unit capacity (MWt) 6.5 6.0 6.7 6.2Unit yield (MWht/yr) 36,000 33,800 36,200 30,000Artificial lift wells 49 36 27 25Self-flowing wells 6 7 7 12

source: ADEME, BRGM

1400-1700m

A B AWH WH

HX

PP

PW

C

IP

IW

IW

900-1400m

DOGGER GEOTHERMAL RESERVOIR

UPPERCRETACEUS

LOWERCRETACEUS

55�

30� 30�

LUSITANIAN

UPPERJURASSIC

MID JURASSIC

A - two vertical wellsB - 1 vertical, 1 deviatedC - two deviated wells

PPproduction pumpIPinjection pumpHXheat exchanger

PWproduction wellIWinjection wellWHwellhead

GDH doublet options Drilling deep wells in denselypopulated areas

Well do ublet features

AcidificationEssais de production et remontée(build -up) de pressionsPrélèvement de fond (PVT et analyses)

GRBHC Sonic

Spectral DensityPLT

( flotmètre , sondepression/

temperature)

1750 -1850Découvert(OH)

Salée aux Biopolymèresdégradables

PDC1750 -1850

8 1/2

Coupe tubage 9 5/8 ‡ 400 m/sol ( chambre de pompage)

Cimentation (laitier classe G) classique2 étages DV ‡ 1050 et 480 m/sol

GRDLLBGLMFC

CBL-VDL

400 -17489 5/8Mixte bentonitique/ polymères cellulosiques

PDC1100 -1750

12 1/4

Début déviation 450 m/sol ; gradient 1/10 m, 35, fin déviation 800 m/sol�� �DD + MWD de 450 ‡ 800 m, MWD ensuiteCimentation classique (tête, float collar et shoe) laitier classe G

GRDLLBGLMFC

CBL-VDL

0-109913 3/8Eau claire + bouchonsvisqueux

Mixtebentonitique/polymères

cellulosiques

TCPDCPDC

400 -#690690 -1100

17 1/2

Cimentation innestring0-39918 5/8Bentonitique simple (BSS)

TC0-40023

ObservationsDiagraphies

différéesIntervalle(m/sol)

Phase tubée ( ")BoueOutil

Intervalle

(m/sol)

Phase forée

( ")

(

-

�

( )( )

Typical drilling/completion programmeSelf flowing wells (WHP below bubble point)

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

22000

24000

26000

-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

No

ofho

urs

17161514131211109876543210-1-2-3-4-5-6-7

24000 5000 0

Useful heating power (kWt)

Outdoor temperature

Outdoor temperature

BACKUP

P1 P2 P3

p3p1 p2

radiators

floor slabs

GEOTHERMAL INPUT

e ra g ec o vH e a tin p u tG e o th e rm a l

ra t ioC o v e r a g e

Transition temperature

Geothermal power

Use

fulh

eatin

gpo

we

r(kW

t)

p1 P1

p2 P2

p3P3

Equipement performanceand fifetime record

15SURFACE PIPING

-2015FREQUENCY CONVERTER

10 -15PLATE HEAT EXCHANGER

5-8

6-8PRODUCTION TUBING

10INJECTION PUMP

4-55-8

PRODUCTION PUMPSESPHTP

5XTREE VALVES

20 -25WELLS

LIFE ( yrs )ITEM

DOWNHOLE CHEMICALINJECTION LINE

Structure of Paris basin GDH system

Heat load duration curves Breakdown of GE VS. fossil fuelsand heating devices

An environmentally friendlyworkover set up

Downhole pump figures of meritPump type Pros Cons

LSP

LSP

No electric parts in hole. Higher efficiency (surface motor). Long lifetime. Withstands

high temperatures. Attractive costs.

Depths limited to 200 m. Delicate handling (installation/removal). Definition of enclosing

tubing coating and bearing materials.

ESP

ESP

High submersion depths. Long lifetime. High flowrates in limited casing TD's (250 m3/hr in

9"5/8). Withstands high temperatures. Solution gas handling (in hole separator). Worldwide

service factilities.

Lower efficiency. Electric insulation

shortcomings. Higher costs.

HTP

HTP

Very long lifetime. No electric parts in hole.

Withstands very high temperatures.

Low efficiency (additional energy conversion item). Large diameters (OD's) required. Packer anchoring problems. High costs. Limited manufacturing/service facilities.

GLOSSARY

GENERALINFORMATIONPARAMETERS DATA

ARCHIVE

HEAT PLANTEQUIPMENT

INJECTIONEAUIPMENT

PRODUCTIONEQUIPMENT

DICTIONARY

THERMO-CHEMICAL

MONITORING

INTERVENINGPARTIES

EVENTS

CALIBRATION

HEAT PLANTEXPLOITATION

PRODUCTIONFIGURES

INJECTIONFIGURES

CASINGCONTROLCORROSIONCORROSION

TREATMENT

ELEMENT BUBBLEPOINT

WELLCASING

RESERVOIRPROPERTIES

GEOTHERMALSITE

Dogger database structure(source: BRGM/GPC/CFG)

Meulin drill site