Parent Command
> OBSERVATION

Subcommand
>>> ELEMENT

Description
This command selects as a parameter the content of phase iphase as an observation type. Phase content is defined as the product of saturation and porosity. The phase name phase_name or phase number iphase, which depend on the EOS module being used, are listed in the iTOUGH2 header, and can be specified either on the command line or using subcommand >>>> PHASE. Estimating phase content and phase saturation is identical only if porosity remains constant. Porosity can be variable (i) due to compression of the pore space (i.e., if TOUGH2 variable COM(NMAT) is not zero), and (ii) if porosity is one of the parameters to be estimated and is updated during the inversion.

Example
> OBSERVATION
>> TIME: 1 point at steady-state
1.0E20
>> LIQUID CONTENT or
CONTENT in PHASE No.: 2
>>> ELEMENT: A1__1
>>>> ANNOTATION: Water content
>>>> FACTOR : 0.01 (data given in %)
>>>> one steady-state DATA point
0.0 23.0
1.0E50 23.0
>>>> DEVIATION: 5.0 %
<<<<
>>> ELEMENT: A1__1
>>>> ANNOTATION: Gas content
>>>> GAS PHASE (overwrites iphase specified on command line)
>>>> NO DATA, just for plotting
>>>> WEIGHT : 1.0E-20
<<<<
<<<
<<

See Also
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