important results were highlighted by the experiments made during this trip :
all flow measurements confirm the validity of the computer generated calculations
of diphasic flow. This confirmation allows for the extrapolation of the calculations
to an industrial usage many times greater than what was achieved here.
the (unexpected) discovery of an enrichment in methane according to depth, which
clearly parts company from the law forcast by models of equilibrium, has important
consequences for the design of future systems of methane extraction.
fact that the gas escaping from the separator has a lower methane content than
expected implies that the water expelled by the separator contains more methane
than was foreseen. The loss of water in the discharged water (from the separator
and from the washing column) becomes the main problem to deal with in order to
optimise the design of the equipment. This fact argues in favour of positioning
the separator at a shallow depth. A depth of 30 m seems too much, given the loss
of methane produced; the optimal depth foreseeable is thus 25 m, maybe even 20