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Ecrin v4.12 - Doc v4.12.02 - © KAPPA 1988-2009
Diamant Master Guided Session #1
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DmmGS01 - 27/33
As a derived channel, the corrected production would be extended automatically as the input
oil rate gets updated via the database. All we would need to get this channel up-to-date is to
pick the future build-ups so that the build-ups definition is up-to-date.
¾
Select the Plot view for Well#1
, select ‘raw data production oil rate, ‘corrected
production oil rate’ and ‘shut-in indicator’, to view the difference between the original
production and the modified one. A blown-up view at the beginning of one of the
longest build-up is presented on the following figure.
Note:
the corrected production is a representation of the surface rates. When downhole rates
are present and we have soft shut-ins of the kind above, it may be preferable to define the
build-ups only at the time when the downhole rate vanishes. This is beyond the scope of this
session.
By applying this formula we can see here that the rate now is strictly zero when the shut-in
indicator is 1 (means that a shut-in is selected), eliminating thus potential noises when there is
no flow, and strictly cut to zero at the start of shut-in for synchronization with pressure
history.