FROZEN HEAT | Volume 2

WR313“Orange” Sand WR313“Orange” Sand

Compressional Velocity (ft/s) Compressional Velocity (ft/s)

Calculated Gas Hydrate Saturation Calculated Gas Hydrate Saturation

Gamma Ray (API) Gamma Ray (API)

Resistivity (ohm*m) Resistivity (ohm*m)

Porosity (ft3/ft3) Porosity (ft3/ft3)

2610

2610

Density Neutron Density Neutron

MP3 S.Vision MP3 S.Vision

n=1.5 n=2.5

n=1.5 n=2.5

2620

2620

Clay-rich, Low-permeability Top Seal Clay-rich, Lo -per ea ility l

2630

2630

2640

2640

2650

2650

2660

2660

Gas-hydrate-bearing sands with minor interbedded muds Gas-hydrate-bearing sa s with minor interbedded mu s

Depth(fbsf)

Depth(fbsf)

2670

2670

2680

2680

2690

2690

2700

2700

2710

0

2710

50 100

0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2

5000 5000

10000 10000

0 0.5 1 0 0.5 1

10 -1 10 0 10 1 10 2 10 -1 10 0 10 1 10 2

0

50 100

Figure 2.9: Well data from a gas hydrate exploration well drilled in the northern Gulf of Mexico in 2009. These data obtained from the Walker Ridge 313 “H” well show two sand-rich reservoirs enclosed in clay-rich sediments that are fully saturated with gas hydrate (right panel). (From Boswell et al. , 2012).

A GLOBAL OUTLOOK ON METHANE GAS HYDRATES 47

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