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Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Ecrin Guided Session #1 • EcrGS01 - 23/36
The shut-in detection settings dialog appears:
Make sure that ‘analyze the signature of the
data’ is checked with the displayed option
selected.
Set the minimum pressure change for a shut-
in to be 200 psia and minimum shut-in
duration to be 1 hour.
Press OK.
All the BUs detected, according to the criteria, are highlighted. see Figure D01.1 below.
Fig. D01.4 • Detected build ups
Clicking on the node ‘Shut-in indicator’ displays the all the BU’s detected.
Before using these multiple build ups for analysis purpose, we need to clean and adjust the
production history in order to get it synchronized with the pressure history.
Note: Although the automatic detection is very useful and can speed up significantly the data
pre-processing stage, it is based on an algorithm which may sometimes come up with incorrect
limits if the pressure build-up exhibits such behaviors as irregular humping, soft shut-ins, very
noisy shut-ins, etc. In those situations, you can correct the limits manually or semi
automatically. In our current case, the selection made automatically can be kept.