LACQ -ROUSSE CO 2 storage demonstration pilot

Axel-Pierre Bois – November, 25 2014

LACQ - ROUSSECO2 storage demonstration pilot

Axel-Pierre Bois – November, 25 2014 2

Agenda

• Rousse pilot

• Cement-sheath chemical integrity

• Cement-sheath mechanical integrity


Lacq-Rousse demonstration pilot

S.THIBEAU - EAGE-SES Conference - 8-10 Nov 2011 - Valencia

Lacq Profond gas reservoir

Oxygen

Production

Unit

Lacq gas production

1

Natural gas inlet

2

Lacq gas treatment plant

3

Commercial gas

4

UtilitiesBoiler oxycombustion

5

CO2

6

CO2 Transportation

7

Compression

8

CO2 injection

9

CO2 storage

10

4000 m

4500 mComm.gas

Steam

Purification / CO2 dehydration

Compression

Rousse reservoir

CO2 injection

CO2 transport

Captage

Gas production

01/2010 - 03/2013

51 000 t injected

Up to 120 t CO2/j



Selection among gas fields produced by TOTAL



Reservoir comparison for site selectionMax flow

MSm3/j

Cumul flow

GSm3

Pressure - MPaInstallations Production

Initial Final

Lacq 30 250 62 2 Oui Oui

Meillon Saint Faust 10 58 48 10 Oui Oui

Ucha-Lacommande 0.3 1.9 47 7 Non Non

Rousse-Mano 0.3 0.9 48 3 Oui Non

Rousse-Meillon 1.2 3.7 49 15 Oui Oui

Pilot 0.06 0.06 10

• Rousse-Mano is an isolated low-pressure reservoir that is no longer produced and that is still completed

• It has been produced with on well : RSE-1



Mano

Jurassic

Dolomitic

Fractured

4200 m (NM)

Φ ~3%

Km < 1 mD

Kf ~ 5 mD

150°C

48 � 3 � 8 MPa

South NorthPau


Regional scale geological reviewRegional seismic interpretation of major horizonsRousse local seismic interpretationStatic reservoir modelingFluid, pressure and temperature reviewHistorical production and pressure dataDynamic reservoir modeling


Geomechanical modeling



• Under-pressurized reservoir• Capillary entry pressure

– Difficult to evaluate due to heterogeneity

• Geomechanics

– No plasticity during production

– Fault stability uncertainty at pressure larger than the initial pressure



• Geochemistry

– Limited impact of CO2 on the carbonated reservoir

– Minor variations of mineralogy and porosity

– Diffusion of CO2 through the overburden slowed by geochemistry

• Deshydration in near wellbore area due to gas expansion



• CO2 migrates downwards in the reservoir

– No accumulation of CO2 below the overburden

• Wellbore integrity

– Cement sheath initially good

– No risk due to mechanical damage

– No risk due to chemical degradation



• Injection monitoring– Flow, composition

• Surface seismicity monitoring

• Downhole reservoir monitoring– P, T @4335 m

– Seismicity

• Environnemental monitoring



Rousse

The Pyrénées

Spain

France

30km • Regional seismicity related to Pyrenees and Lacq reservoir depletion

• Close to the site– Only 3 events detected by the surface network near Rousse with magnitude between -1 and -0.3

– From March 2011, more than 2000 micro seisms detected by downhole sensors with magnitude between -2.4 and -0.8


Cement / CO2 : Uncoupled tests

Cement is first in contact with C02then mechanically tested

Gas injectionGas exit

PCO2 = 8 MPa

T = 90°C

for neat class G

T = 140°C

for class G+35%

silica BWOC

80 bar


Cement/CO2 : Uncoupled testsX-Ray tomography: cement densification (carbonation) over time

Neat Class G

90°C

8 MPa

Class G + Silica

140°C

8 MPa

Reference

Reference

7 days

4 days

36 days

21 days

65 days

31 days

90 days

88 days


Cement/CO2 : Uncoupled tests

Kinetics of the reaction:

Linear with respect to square root of time

9.6 mm/√yr

Porosity decreases from 30 to 22%

Kinetics of the reaction:Linear with respect to time73 mm/yr

Porosity is less affected (25-28%)

0

3

6

9

12

0 2 4 6 8 10

Degraded thickness (mm)

Time of experiment (v day)

0

5

10

15

20

25

0 20 40 60 80 100Degraded thickness (mm)

Time of experiment (day)

Re

act

ed

th

ick

ne

ss (

mm

)R

ea

cte

d t

hic

kn

ess

(m

m) 140°C – Class G + Silica

Neat Class G @ 90°C & 8 MPa

Class G + Silica @ 140°C & 8 MPa

90°C – Neat class G


Cement / CO2: Coupled tests

Cement is in contact with CO2 under stress

Non reactive water

CO2 rich fluid

PCO2 = 2.5 MPa

Vertical stress

σ1 = 6 MPa

Piston

Cement plug

T = 90°C (194°F)

σ3

σ1

Confining pressure

σ3 = 3 MPa



Hydrostatic stress

3 MPa

Deviatoric stress

σ1 = 6 MPa - σ3 = 3 MPa

Time

Neutral water inj. CO2-rich water inj.

Stress

0

20

60

30

50

10

40

90°C

2.5 MPar



-180

-160

-140

-120

-100

-80

-60

-40

-20

0

20

0

1

2

3

4

5

6

7

8

9

10

0 2 4 6 8 10 12 14

Vo

lum

e (c

m3)

Time (day)

Perm :

1,9.10-18m²

Perm:

1,6.10-18m²

σ3 = 30 bar

σ1 = 60 bar

ε1

Pi = 25 bar

Injected

volume

Hydrostatic stress Deviatoric stress

Distilled water injection CO2-rich water

Clogging


Cement-sheath mechanical integrity

Heating

Increase in mud pressure

Stiff formation

Tensile

failure

ττττ

σσσσ''''

σσσσrσσσσθθθθσσσσθθθθ σσσσr

Increase in

radial

stress

Decrease

in hoop

stress

Shear

failure



Heating

Increase in mud pressure

Soft formation

σσσσrσσσσθθθθσσσσθθθθ σσσσr

Increase in

radial

stress

Decrease

in hoop

stress

Tensile

failure

ττττ Shear

failure

σσσσ''''



+ 20 MPa

- 1 MPa0 MPa

+ 5 MPa

+ 15 MPa

σσσσCompressive damage

+ 10 MPa

Tensiledamage



0.00

0.10

0.20

0.30

0.40

0.50

0.60

0 50 100 150 200 250

Hydration degree

Time [h]

Measured

Computed



0

1000

2000

3000

4000

5000

6000

0 20 40 60 80 100 120 140

Modolus [MPa]

Time [h]

Ku

Kd measured

Kd

0

5

10

15

20

25

30

35

40

45

0 200 400 600 800 1000 1200

UCS [MPa]

Time [h]

at 40°C

at 20°C



0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0 50 100 150 200

Shrinkage [%]

Time [h]

3000 psi

2000 psi

1000 psi

500 psi

100 psi

0 psi

Computed



10

15

20

25

30

35

40

45

50

0 1 2 3 4

Pore pressure [MPa]

Time [h]

4632 ft 3636 ft

8754 ft 4787 ft

5488 ft 6909 ft

Computed

Pre

ssu

re



AnalyticalAnalytical

NumericalNumerical

CURISINTEGRITY TM


Cement-sheath integrity

Loadings

– Cement hydration

– Mud pressure

– Temperature

– Pore-pressure

– Compaction

– Dynamic

Mechanisms

– Elasticity

– Shear failure

– Tensile failure

– Pore collapse

– Creep

– Fatigue

– Degradation

Thank you

CurisTec Parc d’Affaires de Crécy3 rue Claude Chappe69370 Saint-Didier-Au-Mont-d’Or(Lyon) France+33 4 74 26 93 55

www.curistec.com

LACQ -ROUSSE CO 2 storage demonstration pilot

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