`PIMULTAB`

Recognised by the OPM Flow parserSCHEDULE

Not supported. (But perhaps it should be!)

Reply to Atgeirr Rasmussen (09/20/2017, 14:53): "..."

Are you sure, it is in the Norne deck for history matching.

Changed.

PIMULTAB defines productivity index multiplier versus water cut tables that are used to scaled a well’s connection factors based on connection’s current producing water cut. The tables are used for modeling the productivity decline due to increasing water cut. Allocation of the tables to a well is via the WPITAB keyword in the SCHEDULE section.

Notes:

The keyword is followed by NTPIMT tables as stated on the PIMTDIMS keyword in the RUNSPEC section.

Each table must contain a minimum of two rows and a maximum of NRPIMT rows as declared on the PIMTDIMS keyword in the RUNSPEC section.

Each table is terminated by a “/” and there is no “/” terminator for the keyword.

See also the WPITAB keyword that allocates the tables to the wells, and also the WPIMULT keyword that scales a well’s productivity index by a constant value, both of which are in the SCHEDULE section.

This keyword is not supported by OPM Flow but would change the results if supported so the simulation will be stopped.

Records: Fixed number of records
Variadic: The record accepts a variable number of items

Parameters

No.	Name	Description	Type	Field	Metric	Lab	Default
1	`TABLE` manual: `WCUT`	A real monotonically increasing positive columnar vector that defines the maximum surface water cut for the corresponding PIMULT vector. Water cut is defined as[f sub w ~=~ {q sub w } over {q sub w `+` q sub o}]..	DOUBLE	dimensionless	dimensionless	dimensionless	None
2	`PIMULT`	A real positive decreasing columnar vector that defines the productivity index multiplier used to scale a well’s connection factors, for the corresponding WCUT vector.		dimensionless	dimensionless	dimensionless	None

Example

Given NTPIMT equals two and NRPIMT equals four on PIMTDIMS keyword in the RUNSPEC section, then:
-- DEFINE WELL PRODUCTIVITY INDEX VERSUS WATER CUT TABLES
--
-- MAX PI
-- WCUT MULT
-- ------ ------
PIMULTAB
0.0000 1.0000
0.2500 0.9500
0.5000 0.8500
0.7500 0.7500 /
--
--
0.0000 1.0000
0.2500 0.9500
0.5000 0.8500
0.7500 0.7500 /
The next example is summarized from the Norne model with NTPIMT equals one and NRPIMT equals to 51 on the PIMTDIMS keyword in the RUNSPEC section.
--
-- DEFINE WELL PRODUCTIVITY INDEX VERSUS WATER CUT TABLES
-- The following is the reviewed model in Aug-2006, low-high case
-- a=0.25, b=0.1; PIMULT=(1-a)/exp(fw/b)+a
--
-- MAX PI
-- WCUT MULT
-- ------ ------
PIMULTAB
0.000 1.0000
0.025 0.8341
0.050 0.7049
0.075 0.6043
0.100 0.5259
0.125 0.4649
0.150 0.4173
0.175 0.3803
0.200 0.3515
0.225 0.3290
0.250 0.3116
0.275 0.2979
0.300 0.2873
0.325 0.2791
0.350 0.2726
0.375 0.2676
0.400 0.2637
0.425 0.2607
0.450 0.2583
0.475 0.2565
0.500 0.2551
0.525 0.2539
0.550 0.2531
0.575 0.2524
0.600 0.2519
0.625 0.2514
0.650 0.2511
0.675 0.2509
0.700 0.2507
0.725 0.2505
0.750 0.2504
0.775 0.2503
0.800 0.2503
0.825 0.2502
0.850 0.2502
0.875 0.2501
0.900 0.2501
0.925 0.2501
0.950 0.2501
0.975 0.2500
1.000 0.2500 /

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