Voidage Replacement Ratio Package

This package calculates the instantaneous voidage replacement ratio (VRR) and the cumulative voidage replacement ratio for each formation. Tag entries are created if the VRR exceeds or falls below certain thresholds.

Usage

Run the workflows from this package to perform the calculations. The schedules may be adapted to use different contexts.

Details

Instantaneous VRR

The instantaneous VRR is calculated as:

............................................. (1)

where

Cumulative VRR

The cumulative VRR is calculated as:

............................................. (2)

where

If not all data is available to calculate the cumulative voidage replacement ratio, the following, simpler formula is used:

............................................................... (3)

where

Data Requirements

The following data is required on well or sub-well level:
 injection volumes (gas, water)
 production volumes (oil, gas, water)
 formation volume factors (oil, gas, water)
 solution gas oil ratio
 VRR thresholds (upper and lower)

Data will be automatically aggregated to formation-level (see Further Comments for details).

Further Comments

This version of the package makes use of a hierarchy with the name Reservoir Hierarchy. Please make sure this hierarchy is available and contains valid formation<->well relationships.