image
Emeraude v2.60 – Doc v2.60.01 - © KAPPA 1988-2010
Guided Interpretation #4
•
B04 - 8/14
Fig B04.12 • New interpretation
Change method, Init, and enable the Standing water option
Change to ‘Continuous’ method and Init based on ‘Surface rates and inflow types’.
When matching the temperature those two choices should be the norm. The Continuous
method will seek an agreement between the simulated and measured temperature
everywhere. If we used the ‘Zoned method’ each calculation zone would consider 2 residual
points for the regression, one at the bottom of the inflow above, the other at the top of the
inflow below. Usually working only on those discrete points is not sufficient, unless there is a
very large number of inflow zones.
For Init, i.e. finding an initial solution, the ‘Zone local values’ option amounts to running a local
regression on each zone focused for the temperature on the two residuals mentioned above.
Because those regressions are run in isolation, and because they use only those 2 control
points, the result is sometimes erratic. With the ‘Surface rates and inflow type’ option, on the
other hand, the starting point is obtained by splitting the overall production evenly among the
inflow zones.
In the ‘Reference channels’ tab check the ‘Flow through standing water up to’ and enter
726 m.
We know that the water present inside the casing is not flowing to surface. However, by
default, Emeraude will only come up with a water holdup if this water is mobile. This means
that we will either have a water production at surface or else, end up with solution showing
water production and a water thief zone. One way of dealing with such a situation is to use the
‘Standing water option', which will allow a water holdup to be calculated with no water flowing.