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The Potential and importance
of Chinese Offshore Basins forCO2 Geological Storage
Li Pengchun Zhoudi
South China Sea Institute ofOceanology, CAS
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F M Orr Science 2009;325:1656-1658
Deep saline formation capacity
is biggest
1.2.CO23.(3a), (3b)4. CO2
1. Necessity and importance of CO2 Storage in Saline
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What is offshoregeological storage
1.Offshore basins are unattached
to onshore, the rocks in the
offshore basin may not occuronshore at all
2.Onshore basin extend offshore
under shallow seas;
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Potential of offshore basins
There are plenty of offshore basins on the continental shelf around the world;
Including shallow water (SW)
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Potential of offshore basins
Global offshore gas and oil basin
Many offshore basins on the continental shelf of countries
around the world hold large resereves of oil and gas.
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Basins which hold oil and gas reserves are generally accepted to have the
best potential for CO2 storage, so many offshore basins can be expectedto have a high potential for CO2 storage
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Offshore vs. onshore CO2 storageMerits: Land saving;
No damage to ground water;
Low environmental impact; Around the world theoffshore basins often havebetter geologicalcharacteristics for storage
Defects:
Because of the water abovethem, the marineengineering challenges canbe much greater forexploration as well as CO2storage;
High cost of infrastructure,operation, and monitoring.
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Chinese offshore
sedimentary basins
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Five sea: bohai,yellow
sea,east sea, south sea,
eastern Taiwan pacific
sea
26 Basin,
Area: 183.5*102km2
1,319,37055,00033,68025,00043,200
EQ13.213500208,710EQ9710500112,340R9000140,000R
29.7150500
1000098,700R
20.0235700
1550041,300R
16.71500
900036,350R
67.9513000
10000202,800K+R3.31000055,660 K+R7.31200065,540 JR
53.7924600
12000241,300
K2+
R+Q5.58007000
820085,000
J+R1.4500015,000N+E
40.2912200
1000195,000(77,00
0)()
(tm3)
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Offshore basins on
the continental shelfof China hold many
Oil and Gas Fields .
oil and gas fields: 121
structural traps :117
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proven total geological
reserves Oil 33.56*108t
Gas:5853.32*108m3
2010, oil equivalentproduction()5158*104t
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The importance of offshoreCO2 storage for China
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Basins inland Guangdong are small & with low storage capacity
Maoming B.Oil shale
5km sediments
Leiqiong B.
Volcanics
Sanshui B.Oil & CO2
4.5 km sediments IGCC plants inplanning
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Offshore CO2 storage is crucial
for southern China !
Depleted oil/gas fieldsare Early opportunities:By
utilizing existing data, platform and other facilities,
the cost of offshore CO2 injection may be greatlyreduced.
Early planning is the key !
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CO2 storage potential and
early opportunities in
Chinese offshore basins
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CO2 storage potentialBased on published data,
geological conditions and
paramners for CO2storage are anaylized.
National Scale assessment
on CO2 storage capacity
in offshore basins ofChina,
The estimated effective
storage capacity of 17
offshore basins
is 1928Gt, which capacity
of South China Sea Basins
is 1179Gt, account 60%
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CO2 storage potential of Northern South China Sea Basins
PRMB baisn:PassiveContinental Margin
Depressed Basin
BBW Basin:
intracontinental rift
basinQDN Basin:Passive
Continental Margin
Depressed Basin
YGH Baisn: strike-slip rifting basin
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BBw basinPRMB Baisn Yinggehai-Qiongdongnan
Basin
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CO2 storage potential of Northern South China
Sea Basins
1487.43795263080Capacity
108tYGHQDNBBWPRMBbasin
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The Pearl River Mouth Basin
~200,000 km2 Maximum sediment
thickness >14 km
The largest basin in
northern South ChinaSea
Rich oil/gas reserves
Proximal to industrializedcoastal Guangdong
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Source-Sink MatchingSource-Sink Matching
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Case studyCase study
LF G
LF G
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Thank you for your attention
Questions