Measurement criteria

Measurement criteria can be used to query any property in the Metis database and can be used in combination with any other form of criteria.

To create a simple query expression the Add criterion button which will provide a list of available criteria; select Measurement criterion. This expands the criteria panel to show the property selector.

The property selector can be used in a flexible way to find any property that can be measured and stored within the IGI data model. Type “name” into the property box:

Discover will find all the properties in the system that match this search term, select Well Name. Wells can be queried on by Discover using their well name in this way:

Simply type the name of the well you want to find, or a string that contains the desired well name. Discover will return all wells where the Well name contains the search string.

Discover utilises the full IGI property model, to find more information about our property model and some of the key concepts underpinning it click here.

To filter the data further we can use Discover to add additional expression elements. Selecting the Add criterion button again and add a second measurement criterion. This time type “tmax” into the property box:

In this example, T-max can be measured across a number of analyses, if you know you are only interested in one particular analysis you can select it directly from the property search results. A user can also restrict the properties to an analysis by using the analysis group box. However, it’s likely that you may not want to restrict your results to a particular analysis and in this case you can use the .Any analysis group. As the name implies, this will apply a filter to a T-max value measured by any analysis. Select the T-max.Any property.

For numeric properties Discover allows a range of data to be filtered, change the criteria to return values less than 435.

By clicking query again, Discover will find samples that are within the original well and below the defined value of T-max. It’s also possible to change the expression to include other logical operators, for example by changing the expression to A or B all samples that fulfill either criterion will be included in the query results.

In this way, it is possible to build complex expressions based upon any measured property in the system that filters the data in the system to very specific sample criteria.