This presentation was delivered at the Global CCS Institute's Global Status of CCS: 2014 event in Abu Dhabi on 5 November.

1. Research and Practices on CO2 Capture
and Storage for EOR （ CCS-EOR）
Shen Pingping, Dou Hongen
China National Petroleum
Corporation（ CNPC）
November, 2014

2. Outline
1. Introduction
2. Chinese Government Concerns about Reducing CO2
and CO2 Utilizing as Resources
3. Research on CCS-EOR
4. Practices on CCS-EOR
5. Prospect on CCS-EOR
6. Conclusions

3. The major methods of reducing CO2 emissions :
 Developing renewable energy and improving the energy
efficiency is the best way to reduce CO2 emissions
 CO2 capture and then storage (CCS) is an effective
method
 Oil & Gas Reservoirs, saline aquifers and coal beds are
ideal place for CO2 Storage
 It is predicted that 923 billion tons of CO2 can be stored in
oil and gas reservoirs(IEA)
1. Introduction
1.Reducing greenhouse gas emissions.
The continental reservoir geological theory, China’s CO2 storage potential

4. 2. CO2 can be used for enhancing oil recovery
 The potential for EOR in developed oil field is great
Natural
energy
Water & gas
injection
Primary
Recovery
Secondary oil
recovery
EOR
Development Mode
Thermal oil
recovery
Chemical
flooding
Gas
injection
Ultimate
Recovery Rate
10-
15％
30-
35％
40-45％
Gas flooding
(Tertiary oil
recovery)
1. Introduction
CO2 –EOR theory, method and potential in china reservoir

5. 1. Introduction
Injecting the captured CO2 into
oil reservoirs can not only reduce
its emissions, but also can
enhance the oil recovery in a
practical and economical
manner

6. 2. Chinese Government Concerns Greatly about Reducing
CO2Emissions and Utilizing It as Resources
 In 2006,China Ministry of Science and Technology
approved CNPC to undertake a National
Fundamental Research Program—Research on
Utilizing Greenhouse Gas as a Resource for EOR and
Storage.
 In 2007,CNPC sponsored a major science &
technology research project– Utilizing Greenhouse Gas
as a Resource and Geological Storage, as well as a pilot
project—Pilot test of CO2-EOR and CO2 Storage in Jilin
Oil Field.
 In 2008,the Chinese government approved a Major
national program—CO2 Capture and Storage for EOR
 In 2011, Chinese National Fundamental Research
Program (973 program) and Chinese National Major
Science and Technology Project have approved to
continue by government
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projects
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cooperation
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（2009- 2010）
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7. 3. Research on CCS-EOR
1. Research on CO2 storage and CO2-EOR potential
 Standards and Calculation methods of the
storage potential as well as the CO2-EOR
potential are built
 Storage potential for CO2-EOR of have
been evaluated in China. And drew
distribution map of whole China of CO2
storage and CO2-EOR, expected oil
recovery factor is over 10%

8. 3. Research on CCS-EOR
2. Research on phase theory of multiphase and multicomponent
 HT/HP microscopic physical simulation
 Major components of the miscible fluid
in Jinlin oil field: C2-C10 and their
contents
 if CO2 with crude oil can keep miscible,
oil recovery will be raised greatly

9. 3. Research on CCS-EOR
3. Flow mechanism and law of multiphase and multicomponent
HT/HP CO2 flooding physical simulation equipment with 30m in length
was invented
One-dimensional flow of CO2 in porous media was studied
CO2-EOR numerical reservoir simulation model were developed

10. 3. Research on CCS-EOR
4. Engineering technology and method for CO2 injection
Preventing corrosion and scaling in gas injection
wells
Two kinds of corrosion inhibitor and three kinds
of CO2 transportation method
Monitoring CO2 flooding process during pilot
test
CO2 separation

11. 4. Practices on CCS-EOR
CO2-EOR Production System
The gas reservoir of 3500-4000 meters depth, which is developed by means of horizontal
well technology
MEA is used to separate 22.5% of CO2 content from produced gas, and then separated CO2 is
injected into low permeability reservoir to improve oil recovery
Produced associated gas is separated, and then is re-injected oil reservoirs to realize zero CO2
emission

12. 4. Practices on CCS-EOR
1.CO2 source
CO2 source: natural gas produced
from Changshen gas field(CO2
content 22.5%)
CO2 reserves>100 billion m3
Using MEA technology to separate
CO2 from produced gas

13. 2. Geological caprocks of CO2 storage
 Yaojia Formation and Nenjiang
Formation, dominated by shale
with wide and stable distribution
 The cap rocks are effective for
CO2 geological storage, with the
total cap formation thickness of
over 500 m
 Few faults and fracture in the
area
4. Practices on CCS-EOR

14. 4. Practices on CCS-EOR
3. CO2-EOR and Storage Potential in Jilin Oilfield
Typical Block---Block Hei-79 in Daqingzhijing Oilfield
CO2 utilization coefficient: 0.17 ton/bbl
Theoretical storage capacity: 0.38million
tons
Effective storage capacity:0. 19million tons
Practical storage capacity:0.17million tons
Enhanced recovery factor:10%

15. 4. Practices on CCS-EOR
4. Reservoir conditions for CO2 miscible and immiscible flooding in Jilin Oilfield
Miscible flooding can be implemented in
block Hei-59 and Hei-79
Immiscible flooding can be implemented in
Block Hong 87-2 and Qian’an

16. 4. Practices on CCS-EOR
5. Reservoir Engineering for CO2-EOR Pilot in Block Hei-59(the Stage I)
Well locations in Block Hei-59 Injector: 5
Producer: 21
Target Zone: Qing-1 Member
Injection method: Continuous gas
injection and then water injection when
reach desired gas injection volume
Injection Rate: 40t/d per well
Maximum injecting pressure at wellhead :
22 MPa

17. 4. Practices on CCS-EOR
5. Reservoir Engineering for CO2-EOR Pilot in Block Hei-59(the Stage I)
6. Reservoir Engineering for CO2-EOR Pilot in Block Hei-59

18. 4. Practices on CCS-EOR
 The pilot was implemented in Block Hei-59 at
Stage I(2008.6). The industrial test was carried
out in Block Hei-79 at Stage II(2010.6). The
whole Daqingzi oilfield will be applied at Stage
III.
 From June 2010, industrial CO2 storage and
CO2-EOR test in Hei-79 Block were
implemented with18 injectors and 62 producers.
By end of 2013, about 0.50 million tone CO2
were stored, and 0.20 million oil were produced.
 It is expected incremental oil recovery factor
can reach 10.5%. Map for pilot and industrial test

19. 5. Prospect on CCS-EOR
 Developing coal chemical industry
greatly will be able to capture the high
purity and low cost of CO2
Massive extremely low permeability
oilfields in western China provide great
potentials for CO2-EOR and storage
Petrochina and Shenhua Group are
cooperating, a CO2-EOR pilot test
project of 100 thousand tones will be
performed before 2015, Also, an
expanded CO2-EOR of 1 million tones
will be carried out after 2015
Distribution of main oil and gas basins in China
Xinjiang
oilfield
Changqing oilfield

20. 6. Conclusions
 CO2 Capture and injection into oil reservoirs for EOR is a practical and economical way for
reducing CO2 emissions and enhancing oil recovery
 A big potential lies in CNPC for carbon capture and storage, oil production growth through
the application of CO2-EOR
 CNPC are willing to join international efforts in CCS-EOR to make due contributions to
global climate change solutions

21. Thank you !
Thank you !