FROZEN HEAT | Volume 2

Production rates, kilograms per second

Temperature (C°)

40 Pressure, Megapascals

25

25

A

B

20

20

30

15

15

20

Temperature

10

10

10

Pressure

Water CH

Water

5

5

4+

CH

4

0

0

0

500

1000

1500

0

0

500

1000

1500

Time, days

Time, days

Vertical displacement, metres

Effective principal stress, Megapascals

0

40

C

D

-0.5

30

σ

1

-1

-1.5

20

-2

σ

10

2

-2.5

-3

0

0

500

1000

1500

500

1000

1500

Time, days

Time, days

Figure 3.6: This figure shows first order reservoir simulation modeling to assess the response of a gas hydrate reservoir to depressurization-based production (Moridis et al., 2011). Frame A shows gas and water production rates, frame B shows reservoir pressure and temperature evolution, frame C shows ground surface settlement and frame D shows changes in the stress regime of the reservoir.

FROZEN HEAT 74

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