Our Pump Efficiency Calcs make several assumptions around the DH Cap@RT, Fillage (m3) value.
- We assume the DH card is the standard card for the well for the whole day.
- We assume the well is running today, similarly to yesterday.
For example: If a card produces 0.01 bbl, and the unit runs 5 strokes per minute, and the unit runs 10 hours per day, and fillage on this stroke is measured at 90%, then…
5 x 600 minutes = 3000 strokes. 0.01 bbl per stroke x 3000 strokes = 30 bbl. 30 bbl x 90% = 27 bbl/day.
If the last Well Test measured 25 bbl, then…
25 bbl / 27 bbl = 93% Pump Efficiency.
If we analyze a Shutdown card, the fillage value will be significantly lower.
5 x 600 minutes = 3000 strokes. 0.01 bbl per stroke x 3000 strokes = 30 bbl. 30 bbl x 50% = 15 bbl/day.
If the last WellTest measured 25 bbl, then…
15 bbl / 25 bbl = 60%
We use the same well test in both calculations, but the volumes on the two different cards can be significantly different causing different pump efficiency values.