`WVFPDP`

Recognised by the OPM Flow parserSCHEDULE

The WVFPDP keyword modifies a well’s Bottom-Hole Pressure (“BHP”) estimated by the simulator by interpolation of the Vertical Flow Performance (“VFP”) tables. The production VFP tables are entered via the VFPPROD keyword and the injection tables by the VFPINJ keyword; both keywords are in the SCHEDULE section.

Note that simulator automatically adjusts the interpolated BHP to account for hydrostatic head using the density of the wellbore fluid and the difference between a well’s BHP reference depth, as per the BHPREF parameter on the WELSPECS or WELSPECL keywords in the SCHEDULE section, and the VFPREF parameter reference depth on the VFPPROD and VFPINJ keywords. Thus, WVFPDP applies an additional adjustment in order to match a well’s flow rate to a given tubing head pressure, by adjusting the BHP.

Notes:

The keyword is followed by any number records with each record terminated by a “/” and the keyword should be terminated by a “/”.

Records: One or more records, each terminated by /
Items per record: 3

Parameters

No.	Name	Description	Type	Dimension	Field	Metric	Lab	Default
1	`WELL` manual: `WELNAME`	A character string of up to eight characters in length that defines the well name for which VFP interpolated BHP adjustment is to be applied. Note that the well name (WELNAME) must have been declared previously using the WELSPECS and WCONPROD (or WCONINJE) keywords in the SCHEDULE section, otherwise an error may occur.	STRING					None
2	`DELTA_P` manual: `DELTAP`	A real positive or negative value that is added to the VFP interpolated BHP value (BHPVFP). A positive value of DELTAP increases the BHP and therefore makes a production well less productive; whereas a negative value is subtracted from the BHP and therefore increases the productivity of a production well. Consequently, the opposite effect occurs for injection wells, that is, a positive value of BHPVFP increases the BHP and therefore increases an injection well’s injectivity; whereas a negative value is subtracted from the BHP and therefore decreases the injectivity of an injection well.	DOUBLE	Pressure	psia	barsa	atma	0.0
3	`LOSS_SCALING_FACTOR` manual: `MULTP`	MULTP is a real positive or negative value that scales the tubing pressure loss by the following equation; [BHP sub {Adjusted}~=~THP`+`MULTP left( BHP sub {VFP} `-`THP right)] Thus, a MULTP value greater then 1.0 increases the BHP and therefore makes a production well less productive; whereas a value less than 1.0 increases the productivity of a production well. Consequently, the opposite effect occurs for injection wells	DOUBLE		dimensionless	dimensionless	dimensionless	1.0

Example

The following example below shows three oils operating under THP control.
-- ------------------------------------------------------------------------------
-- 01 JAN 2000 START OF SCHEDULE SECTION
-- ------------------------------------------------------------------------------
--
-- WELL PRODUCTION WELL CONTROLS
--
-- WELL OPEN/ CNTL OIL WAT GAS LIQ RES BHP THP VFP VFP
-- NAME SHUT MODE RATE RATE RATE RATE RATE PRES PRES TABLE ALFQ
WCONPROD
OP01 OPEN THP 1* 1* 1* 5000 1* 750.0 500. 9 1* /
OP02 OPEN THP 1* 1* 1* 5000 1* 750.0 500. 9 1* /
OP03 OPEN THP 1* 1* 1* 5000 1* 750.0 500. 9 1* /
/
--
-- WELL VFP BHP-THP CORRECTION DATA
--
-- WELL BHP BHP
-- NAME DELTAP MULTP
WVFPDP
OP01 20.O 1* /
OP01 -5.O 1* /
OP01 0.O 1.10 /
/
Well OP01 has a delta pressure correction of 20 psia applied to it’s BHP resulting in a reduction in the well’s productivity for the given 500.0 psia THP operating target. For well OP02, the well’s productivity is increased by subtracting 5.0 psia from the BHP. And finally for well OP03, the MULTP value of 1.10 decreases the well’s productivity by increasing the pressure loss between the THP and BHP by 10%.

Manual source: parts/chapters/subsections/12.3/WVFPDP.fodt