CO2 Capture and Storage: ONGC’s perspective and plan
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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
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
CCS– Is it relevant and important?
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.
Irrelevant and unimportant if
Fossil fuel ceases to be the major source of energy
We are to decide.
CCS projects-- Prerequisites
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.
The scope of CCS projects are limited except for an
assured source
Possible sources
Plants
processing sour gas
Flue gas
Tie up with other sector
Processes involved
Source identification
CO2 capture
Reservoir analysis
Transportation to sink
Injection
Monitoring
CCS– Monitoring and safety
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.
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
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)
Capture of CO2 from Hazira plant
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.
CCS for EOR ( Hazira/Ankleshwar) contd
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
6.9% of the in high case,
4.5% of OIIP in most likely case
2.25% of OIIP in low case.
Project life– 30-35 years
Net gain of 3.13 MMt
CCS for EOR ( Hazira/Ankleshwar) contd
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
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
Status
Completed activities:
CO2 Capture and dehydration studied: Can be operationalised
Reservoir analysis
Under completion:
Transportation of gas
Establishing surface facilities
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CCS in Uran
Source
Issues :
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:
Supply of CO2 to nearby fertiliser plant to manufacture urea. (
there will be 25% increase in urea production).
Flue gas recovery at Mehsana
Source:
Issues:
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:
Yet to be found.
CCS– Its future in India
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.
Excellent opportunity for up/mid stream O&G sector
CCS and synergy– future of
sustainable development
Thank you