Transcript CO2 Capture and Storage: ONGC’s perspective and plan

CO2 Capture and Storage:
ONGC’s Perspective and Plan
Workshop on CCS
January 23,2008
A B Chakraborty
ONGC New Delhi
Contents
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CCS and global concerns
CCS– its relevance and inevitability
Scope in up/mid stream oil and gas sector
Processes involved
Monitoring and safety aspects
ONGC and CCS projects
CCS– Indian prognosis
Global concerns: Is CCS worth an endeavour?
Divided verdict– Developed vs developing debate
 Too costly
 Insignificant short term return
 Zero incentive-- UNFCCC’s reluctance
 Long term efficacy
 Leakage potential
 Safety
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Global Initiatives: Can CCS be made worth the
endeavour?
Extensive R&D for establishing long term efficacy
 Rigorous monitoring of established projects
 Benefits through EOR
 Supplement with incentives (recognition by UNFCCC)
 Making mandatory by law
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CCS– Is it relevant and important?
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Relevant and important if
 Fossil fuel remains the major source of energy; because
Only known process for long term mitigation
Only known process for large scale mitigation at one go
Only known process without possibility of manifestation of
CO2 at some other time and place.
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Irrelevant and unimportant if
Fossil fuel ceases to be the major source of energy
We are to decide.
CCS projects-- Prerequisites
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Assured Source
Technique to capture CO2
Availability of a sink
Technique to transport CO2 from source to sink
Availability of effective monitoring system
CCS– Scope in up/mid stream O&G sector
Prerequisites Possibility
Reason/ Special case, if
any
Source
Poor
Except if there is a sour gas
source
Capturing
technique
Good
Amine capture is a common
technique
Sink
Assured
All depleted reservoirs
Transport’n
technique
Good
Transportation is one of the
O&G operations
Monitoring
Assured
Can undertake required
surveys.
CCS– Scope in up/mid stream O&G sector contd.
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The scope of CCS projects are limited except for an
assured source
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Possible sources
 Plants
processing sour gas
 Flue gas
 Tie up with other sector
Processes involved
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Source identification
CO2 capture
Reservoir analysis
Transportation to sink
Injection
Monitoring
CCS– Monitoring and safety
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Reservoir monitoring to check leakage
Baseline survey prior to injection
Stimulated reservoir analysis backed up by regular
and
reliable monitoring
Multi formation monitoring scheme is the latest
recommendation ( ground water, seismic, PVT , logging etc)
Surface
facility monitoring to check
corrosion/scaling
CCS– Monitoring and safety contd.
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Safety issues:
Safe containment of CO2 underground over the project
life.
There should be no need to re demonstrate in the future
generation about safety aspect of a CCS site.
No storage site should be closed unless long term safety
assured.
A proper regulatory framework to be in place.
CCS– possibility in ONGC
Limited scope
 ONGC– an up and mid stream O&G company
 Most reservoirs are sweet oil bearing
Possibility
 Offshore reservoirs as they have sour gas
 Flue gas from in situ combustion at Mehsana Asset
CCS– ONGC experience
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Approved projects:
– CCS for EOR ( Hazira/Ankleshwar)
Potential project
– CCS for disposal of acid gas (Uran)
– Flue gas recovery (Mehsana)
CCS for EOR ( Hazira/Ankleshwar)
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Capture of CO2 from Hazira plant
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Source– Sour gas from B&S field of Mumbai Offshore(Hazira
Plant processes 40 MMSCMD of sour gas)
Transport it to the mature (depleted) onshore reservoir of
Ankleshwar
 Inject it at S3+4 sand zones for enhanced recovery of crude
from the reservoir.
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CCS for EOR ( Hazira/Ankleshwar) contd
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Project potential
CO2 EOR is feasible by injecting CO2 in the major oil bearing
sand zone under immiscible conditions.
 incremental oil recovery over the base case scenario
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 6.9% of the in high case,
 4.5% of OIIP in most likely case
 2.25% of OIIP in low case.
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Project life– 30-35 years
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Net gain of 3.13 MMt
CCS for EOR ( Hazira/Ankleshwar) contd
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Processes involved
 Sweetening of sour gas by amine absorption
Acid gas is the byproduct (97% CO2)
 Selective removal of H2S from acid gas by selective
regenerative amine ( modified LOCAT Sulphur removal)
 Dehydration and compression of CO2 at Hazira.
 Transportation to Ankleshwar through 12” dia 75 Km
pipeline (new pipeline with anti corrosive material)
 Recompression of CO2 to 160Kg/cm2 for attaining super
critical stage.
CCS for EOR ( Hazira/Ankleshwar) contd
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Processes involved
– Injection of CO2 in 12 injector wells.( new wells required
with anti corrosive casing)
– Production of oil from 67 producer wells (new wells).
( Expected peak production rate is 770M3/day).
– Monitoring for leakage , safety aspects, scaling, sand
problems, corrosion
CCS for EOR ( Hazira/Ankleshwar) contd
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Status
Completed activities:
CO2 Capture and dehydration studied: Can be operationalised
 Reservoir analysis
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Under completion:
 Transportation of gas
 Establishing surface facilities
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CCS in Uran
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Source
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Issues :
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Acid gas obtained from sweetening of the sour gas from MH and
N&H Assets processed at Uran plant.
Absence of a nearby onshore reservoir,
Low quantity of CO2 ( Uran only generates 0.2 MMSCMD of acid
gas, too low to consider offshore sequestration)
Best available alternatives mulled:
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Supply of CO2 to nearby fertiliser plant to manufacture urea. (
there will be 25% increase in urea production).
Flue gas recovery at Mehsana
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Source:
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Issues:
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Flue gas from in situ combustion at the Santhal and Balol
field Flue Gas Composition.doc
Removal of Nitrogen
Very low quantity of CO2.
Best available alternative:
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Yet to be found.
CCS– Its future in India
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India is a member of CSLF
Undertakes R&D on CCS as per CSLF.
Industrial synergy is imperative for better CCS
 Up/Mid stream O&G sector to hire/provide sinks
 Downstream O&G/ power sector to store/provide source.
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Excellent opportunity for up/mid stream O&G sector
CCS and synergy– future of
sustainable development
Thank you