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3.5<br />
25<br />
3.0<br />
20<br />
Ar(%) C O 2(%)<br />
2.5<br />
2.0<br />
1.5<br />
15<br />
10<br />
O2(%)<br />
1.0<br />
0.5<br />
5<br />
0.0<br />
0<br />
72 74 76 78 80 82<br />
N2(%)<br />
Ar(04/18) Ar(05/24) Ar(07/14) Ar(09/12)<br />
Ar(air) C O 2(04/18) C O 2(05/24) C O 2(07/14)<br />
C O 2(09/12) O 2(04/18) O 2(05/24) O 2(07/14)<br />
O 2(09/12) O 2(air)<br />
Figure 6. Soil Gas Composition<br />
4.0<br />
3.0<br />
CO2(%)<br />
2.0<br />
1.0<br />
0.0<br />
14 19 24<br />
O2(%)<br />
04/18 05/24 07/14<br />
9<br />
12<br />
AIR regression line<br />
Figure 7. Relation between CO 2 and O 2<br />
The soil <strong>gas</strong> analyses suggest that the high CO 2 content is caused by the activities of O 2<br />
consumption and CO 2 generation near the surface and is not caused by the leakage of injected<br />
CO 2 .<br />
New Energy Resources in the <strong>CCOP</strong> Region - Gas Hydrates and Coalbed Methane 155
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