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8/12/2019 section3-4-Li Pengchun beijingSchool_lipch

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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

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