Creating Shut-In Identification
Shut-in Identification (SIID) can be performed on pressure (or temperature) history data. Shut-ins are identified by searching for discontinuities in the pressure (or temperature) data. A tangent crossing algorithm fits tangents at some key points around the transient to identify the start and end of the shut-in period. Identified shut-ins are recorded in a special SIID logical channel that has the value of “1” for the duration of the shut-in and “0” everywhere else.
A Pressure or Temperature gauge must exist under the well.
If the gauge is high-frequency, it must be filtered.
Select the Pressure or Temperature gauge in the field hierarchy.
Note
SIID works on low-frequency or filtered high-frequency gauge data only. It cannot be used on high-frequency gauge data directly.
Click on Shut-in,
, at the top under the Plot or Info tab.Define whether the algorithm should look for Build-ups or Fall-offs.
Set the Minimum preshttps://vimeo.com/952665676?fl=pl&fe=shsure change and Minimum shut-in duration for the identification criteria.
Select whether any detected shut-in requires user validation before being used or not.
Click on Create.
Houzé, O. , Allain, O., and Josso, B.: "New Methods Enhance the Processing of Permanent Gauge Data.", SPE 139216-MS