China National Petroleum Corporation （ CNPC）

November, 2014

Research and Practices on CO2 Capture and Storage for EOR （ CCS-EOR）

Shen Pingping, Dou Hongen

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

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

The potential for EOR in developed oil field is great

2. CO2 can be used for enhancing oil recovery

Natural energy

Water & gas injection

Primary Recovery

Secondary oil recovery

EOR

Development Mode

Gas injection

Thermal oil recovery

Chemical flooding

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

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

1. Introduction

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

2008

863 National

Research

Program

863 National 863 National

Research Research

ProgramProgram

20082009

Chinese national Foundation Research

(973 Program)

Chinese national Chinese national Foundation Research Foundation Research

(973 Program)(973 Program)

CNPC major projects

CNPC major CNPC major projectsprojects

CNPC major field tests

CNPC major CNPC major field testsfield tests

National Major science and technology

projects

National Major National Major science and science and technology technology

projectsprojects

International cooperation

International International cooperationcooperation 2006

2007-2008（2009-2010）The USA, Japan, Norway etc.

National major National major

science and science and

technology technology

projects projects

National major National major

science and science and

technology technology

projects projects

2011-

2015

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%

1. Research on CO2 storage and CO2-EOR potential

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

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

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

3. Research on CCS-EOR

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

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

1.CO2 source

4. Practices on CCS-EOR

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

2. Geological caprocks of CO2 storage

4. Practices on CCS-EOR

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%

3. CO2-EOR and Storage Potential in Jilin Oilfield

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

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

4. Practices on CCS-EOR

6. Reservoir Engineering for CO2-EOR Pilot in Block Hei-59

4. Practices on CCS-EOR

5. Reservoir Engineering for CO2-EOR Pilot in Block Hei-59(the Stage I)

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

4. Practices on CCS-EOR

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

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

Thank you !Thank you !