Helping a client evaluate two technologies with virtual calculations, saving many days of manual effort
Helping a client evaluate two technologies with virtual calculations, saving many days of manual effort
After implementing two different virtual flowmeter (VFM) technologies, a North Sea operator was struggling to calculate quality metrics that would help them select which vendor was the best.
The Eigen Data Transformation engine was configured to calculate the necessary metrics in real time, without any user involvement, which saved the petroleum engineers many days of downloading data and creating calculations in Excel.
Extracting the data in line with well tests would have delayed the operator’s vendor selection, added to which performing the necessary calculations in Excel would have taken weeks of an engineer’s time – an alternative approach was urgently required
The operator turned to Eigen to produce real-time calculations and metrics required to make a comparison, by configuring these calculations in the Eigen Analytics Platform and visualised in Eigen Ingenuity.
With flow measurements, the instantaneous flow rate cannot be compared with the estimated (virtual) one, because the signals are noisy and it is impossible reach a conclusion, so instead we calculate the difference between the cumulative rates during a well test.
Steps to assess the accuracy of the oil measurement during the well test
Instantaneous flow rate vs virtual flowmeter rate estimation during the well test
3. The error can be expressed in absolute terms or as a percentage of the total volume.
The error is calculated as a difference and as a percentage of the real cumulative volume so far.
As we can see in the graph, the error difference and %error converge to acceptable low values.
Other displays and metrics were created to help the engineers decide on the best VFM technology, with the calculations and dashboards are configured directly in the Eigen Ingenuity web front-end.
Total facility VFM estimate comparison with facility meter
Table of last well test vs moving average of VFM estimates from one supplier
Because the Eigen Data Transformation engine uses virtual calculations. VFM accuracy calculations and KPIs are available instantaneously and for the history of all wells.
Because no hard coding was involved, calculations and dashboards for evaluation were quickly configured and made available to the engineers.
This made it possible for the engineers in charge of the technology evaluation to obtain the necessary data to evaluate the technologies from the two suppliers within weeks, instead of months.
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Over the past fifteen years, we have worked with many of the major oil and gas operators. We are trusted as engineering experts who deploy digital technologies to create value.
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