current status of the commercial in ... - in-situ combustion
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Current Status of the Commercial In Situ Combustion (ISC) Projects and New
Approaches to Apply ISC
Current Status of the Commercial In Situ Combustion (ISC) Projects and New
Approaches to Apply ISC
Alex T. Turta, ARC Calgary
Salil K. Chattopadhyay, ONGC, India
Robin N. Bhattacharya , ONGC, India
Alexandru Condrachi, Petrom, Romania
Wayne Hanson, BSOC, Louisiana, USA
Canadian International Petroleum Conference, Calgary, June 2005
Journal of Canadian Petroleum Technology (JCPT) November 2007
Alex T. Turta, ARC Calgary
Salil K. Chattopadhyay, ONGC, India
Robin N. Bhattacharya , ONGC, India
Alexandru Condrachi, Petrom, Romania
Wayne Hanson, BSOC, Louisiana, USA
Canadian International Petroleum Conference, Calgary, June 2005
Journal of Canadian Petroleum Technology (JCPT) November 2007
Note: With 2 slides from Sammi Salam, 2012 presentation
Philosophy of Commercial ISC Operation
Philosophy of Commercial ISC Operation
Two ways to apply ISC: Patterns system and peripheral line drive starting from the uppermost point of the reservoir
The line drive system has more advantages in most cases. Most important advantages: easier to operate and to evaluate, while at the pilot and semi-commercial stage
At Suplacul de Barcau, the line drive was applied for commercial exploitation. The “pattern” system was applied just for the ISC piloting phase.
Two ways to apply ISC: Patterns system and peripheral line drive starting from the uppermost point of the reservoir
The line drive system has more advantages in most cases. Most important advantages: easier to operate and to evaluate, while at the pilot and semi-commercial stage
At Suplacul de Barcau, the line drive was applied for commercial exploitation. The “pattern” system was applied just for the ISC piloting phase.
Commercial ISC Processes: Main
Reservoir Properties
Commercial ISC Processes: Main
Reservoir Properties
Field, Company, Country
Formation Oil viscosity
mPa.s
Permeability
mD
Res. Pressure
Initial / @ start of ISC
(psi)
OOIP
MMbbl
Suplacu de Barcau (SB), Petrom, Romania
Sand 2,000 5,000-7,000 140/80 310
Field Depth
ft
Gross pay
ft
Oil viscosity
mPa.s
Permeability
mD
Res.
Pressure
Initial / @
start of ISC
(psi)
Observations
Suplacude Barcau
115-720
27-290 2,000 5,000-7,000*
140/80 Depth & thickness
increase East to
West & North to
South
Suplacu de Barcau: Reservoir PropertiesSuplacu de Barcau: Reservoir Properties
Suplacu de Barcau FieldSuplacu de Barcau Field
Panonian - Cross section
W
O
i’
i
396 376
154397
I2
I2
482 472
473122
479 481480
475 476
478477
474
I1
I1
Suplacu de Barcau - Experimental Stage
(1964-1971)
I1 - ISC patterns
I2 – Steam
drive pattern
Water - Oil contact
Fault
Production Well
Combustion /steam injection
well
UP
DownI1
I1
Suplacu de Barcau - Thermal Methods: Semi-Commercial Stage
Suplacu de Barcau - Thermal Methods: Semi-Commercial Stage
Steam Drive
(4ha/pattern)
Initial ISC pattern
Suplacu de Barcau. Position of the in-situ combustion front as of July 1st, 2004
Suplacu de Barcau. Position of the in-situ combustion front as of July 1st, 2004
Burnt out area
Injection wells (111)Major Fault
Current Status of Suplacul De Barcau exploitation by ISC and CSS as of 2012Current Status of Suplacul De Barcau
exploitation by ISC and CSS as of 2012
..
Sammi Salam, 2012
0
10000
20000
30000
40000
50000
60000
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Time, Years
Oil
P
rod
. , to
ne/
mo
nth
0
20000
40000
60000
80000
100000
120000
140000
01
/61
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Time, Years
Air
in
ject
ed
M S
m3/m
on
th
0
1000
2000
3000
4000
5000
6000
7000
Air
-Oil
Rati
o ,
Sm
3/m
3
Performance of the Suplacu de Barcau ISC Project(as of 2004)
Injected Air Air-Oil Ratio
Sammi Salam, 2012
as of 2012
Legend:
Burned out
Coke
Suplacu de Barcau ISC Project (as of 2004): Results.Dry combustion in a line drive, for a very shallow reservoir
Field Start
of commerc.
operation
Inj.
press.
psi
No. of inj.
wells
No. of prod.
wells
Daily
oil
prod.
by ISC
Bbl/day
Suplacu
de Barcau
1971 150-200 111+ 736+ 9,000++
NOTES
+ At any time, there are, also, 24 production wells under cyclic steam stimulation (CSS)
++ It includes the contribution of CSS, estimated at 18% to 25% of the daily oil production
Suplacu: Essential Results/ProblemsSuplacu: Essential Results/Problems
Results Ultimate oil recovery:
>50%
Air-oil ratio (AOR) in the range of 6,000 to 18,000 scf/bbl (1,100-3,300 sm3/m3), increasing in time
At the low inj. presure., even the AOR of 18,000 scf/bbl is economical
Water cut increased slowly, up to 82%
Results Ultimate oil recovery:
>50%
Air-oil ratio (AOR) in the range of 6,000 to 18,000 scf/bbl (1,100-3,300 sm3/m3), increasing in time
At the low inj. presure., even the AOR of 18,000 scf/bbl is economical
Water cut increased slowly, up to 82%
Operational Aspects Burning out of some
producers
Hot well workover challenges; special killing drilling mud needed
Dehydration/desalting coupled with a stripping unit for processing of crude oil
Leakage to the surface of some combustion gases/air
Operational Aspects Burning out of some
producers
Hot well workover challenges; special killing drilling mud needed
Dehydration/desalting coupled with a stripping unit for processing of crude oil
Leakage to the surface of some combustion gases/air