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The fractures length is
supposed "infinite" or in reality (if two
fracture systemsexist) long enough to intercept always
an other (dead ends are not considered). |
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Concerning that hypothesis
one should be surprise, but some recent research works
show that when at least two systems of fractures exist
and if their frequencies reach ÷ 4 F/m the influence
of their length (>1m) could easily be neglected.
Especially when compared with the incertitude on the
opening on the permeability. |
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The flowing is generally
regarded as non turbulent and the Darcy law is used,
but in the case of gas, we use a transition zone of
flowing (non laminar) and the formula of LOMIZE is used. |
