in salah gas (isg)...in salah 14 3 3 10 10 12 30”/37 km 24”/62 km 32”/36 km 24”/13 km...
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IN SALAH GAS (ISG)
Mohamed KeddamAlger31st May 2010
Project location Hassi Messaoud
Gour Mahmoud
Hassi R’Mel
Hassi Moumene
Krechba
Teg
Reg
Garet elBefinat In Salah
14
33
10
10
12
30”/37 km
24”/62 km
32”/36 km
24”/13 km
32”/83 km
21
38”/60 km
32”/39 km
CNDG38”/5 km
Compression Station
Phase 1:
Drilling of 25 wells- 22 producers- 3 injectors
Construction of 3 CPFCompression Station at Hassi R’MelA 48” Pipeline, 460 km long
CNDG
Hassi R’Mel
Krechba
Teguentour
Reg
Reserves: 24 BCMCO2: 1%173 bars / 102C
Reserves: 21.4 BCMCO2: 9.1%325 bars / 144C
Reserves: 76.5 BCMCO2: 8.6%290 bars / 149C
Reserves: 45.4 BCMCO2: 3.8%178 bars / 108C
Phase 1
Carb.
Dev.
Key elements
Start of the Project, phase 1 November 2001 First gas July 2004 Plateau 9 BCM / year Duration of the plateau 14 years Duration of the Contract 30 years
Compression start up As from 2010
A multi-phase Project, of multiples fields
Investment phase 1 1.7 billion dollars
Reserves in place 340 BCM Recoverable Reserves 232 BCM
Investment for Compression 0.8 Billion dollars Southern Fields Production As from 2012 Estimated investment for Southern Fields 1.5 billion dollars Total number of wells for the two phases 73
0.42
0.35
0.21
0.14
0.07
0.00
0.28
Prod
uctio
n (B
CM
)
12
10
6
4
2
0
8
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Year
(tcf)
Production profiles
Compression
CO2 extrait du gaz
Autre CO2
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
Year
CO2 produced by source
Year
CO2 extracted from gassequestrated
• 0,7 billion of m3 per year of CO2 re-injected
• 60% reduction of greenhouse effect gas
• 20 Million tons of CO2 re-injected through out the life of the project
• Analogies• Equivalent of 200 000 cars running 30 000 km / year• 200 km2 forest equivalent
• Re-injection Capex: 100 Million
• Estimated Re-injection Opex: 10 Million/year
Some Figures
SEQUESTRATION OPTIONS
• Site choice criteria• Integrity and tightness of the reservoirs• Sufficient storage capacity• Good porosity• Moderate Pressure
• Carboniferous Reservoir at Krechba• Tight reservoir and high storage capacity• Availability of seismic data.• Existence of exploration and evaluation wells• A unique facility of CO2 extraction
Krechba
Inter-field pipelines To amine regeneration
Glycol regeneration
Glycol Contactor
CO2Absorber
FutureCompression
Train 2
Water contentCO2 content
Pigging
PipelineTo R'Mel
Gas preheating
Stripper
Pigging trap FuelGas
CO2 extraction and dehydration
Amine regenerationCO2 to re-injection
Wells location
CO2 injection pattern
Carboniferous Reservoir ~20 metres thick
Carboniferous Mudstones ~950 metres thick
Cretaceous Sandstones & Mudstones ~900 metres thick (Regional Aquifer) 4 Gas
Production Wells
3 CO2
Injection Wells
Processing Facilities
Amine CO2 Removal
The CO2 Storage Scheme at Krechba
Carboniferous Reservoir ~20 metres thick
4 Gas Production
Wells
3 CO2
Injection Wells
Processing Facilities
Amine CO2 Removal
Carboniferous Reservoir ~20 metres thick
4 Gas Production
Wells
3 CO2
Injection Wells
Processing Facilities
Amine CO2 Removal
Carboniferous reservoir~20 meters
Productionwells
Injection wells
Amine CO2 Removal
CO2 compression system parameters
CO2 Extraction from produced gas (average content 7%) using Amine
Extracted CO2 is sent to the re-injection system 2 compressors disposed in parallel are used for the compression
of the whole extracted CO2
– Suction Pressure : 0,15 to 0,30 bars– Discharge Pressure : 150 to 200 bars– 4 stages of compression – All the casings and impellers are made of stainless steel
CO2 Compression
Glycol contactor
QR
Dew point
Glycol regeneration
ASCASCASC
ASC
M
FromTrain 2
To Train 2
To venting drum
PC
PC
Stage 4
Fromde-carbonation
To CO2Injectionwells
Stage 3Stage 2Stage 1
• Injection pressure limited to 160 bars in order to avoid any risk of fracturing the reservoir
• Low absorption at the start of the project. Stimulation required
Reservoir challenges
The experience of CO2 sequestration introduced by In Salah Gas Project showed that:
• The solution is technically feasible
• Is Economically acceptable
• The monitoring and satellite pictures show that the CO2 evolves in accordance with predictions and simulations
• Geologically, the solution is viable
• Could be generalized, provided that there be a receiving reservoir
Conclusion