WHP to BHP Correction (KS)
Objectives
The objective of the user task is to perform pressure conversion from a certain gauge depth to a required Datum using lift curve tables (VLP) in ‘*.ecl format’.
The task allows different lift curves to be used for correction throughout the life of the well, to capture possible completion changes, as well as artificial lift including gas lift and pump.
Input
Lift curve reference depth– the depth of the first node; if it is not indicated the user task will take 0 as the first node depth.
Input Pressure – wellhead pressure gauge.
Oil Rate, Gas Rate, Water Rate – surface rate gauges. All three rates are mandatory, if the pressure conversion calculation requires only one or two phase rates then rate channel(s) for the remaining phase(s) with zero values need(s) to be created.
Artificial Lift (optional)– this is for the gas lift injection rates or pump operating frequency depending on the artificial lift to be applied, if any.
Number of lift curve files – this reflects the number of times the well completion is changed.
Lift curve file # – lift curve file in *.ecl format. If the number of lift curve files is more than 1, the files should appear in the dialog in chronological order.
Lift curve unit # (optional) – required if the lift curve file does not explicitly specify the unit system; can be ‘Field’, ‘Metric’, ‘Lab’, ‘PvtM’.
Lift curve start date # – appears when the number of lift curve files is more than 1; the date and time from which the corresponding lift curve file is used for the datum calculations, should correspond to the time when the completion was changed.
Output
Bottom Hole Pressure– converted pressure gauge.
User task dialog
Input and output pressures