`RSCONST`

Recognised by the OPM Flow parserPROPS

RSCONST defines a constant Gas-Oil Ratio (“GOR”), for all dead oil228 “Dead” oil is oil that it contains no dissolved gas or a relatively thick oil or residue that has lost its volatile components. PVT fluids. If the oil has a constant and uniform dissolved gas concentration, GOR, and if the reservoir pressure never drops below the saturation pressure (bubble point pressure), then the model can be run more efficiently by omitting the GAS and DISGAS keywords from the RUNSPEC section, treating the oil as a dead oil, and defining a constant Rs (GOR) value with keywords RSCONST or RSCONSTT in the PROPS section. This results in the model being run as a dead oil problem with no active gas phase. However, OPM Flow takes into account the constant Rs in the calculations and reporting.

“Dead” oil is oil that it contains no dissolved gas or a relatively thick oil or residue that has lost its volatile components.

Notes:

The keyword is terminated by a “/”.

See also the RSCONSTT keyword to define a different constant Rs to the various dead oil PVT tables and the PVDO and PVCDO keywords to enter the dead oil properties. All of the aforementioned keywords are in the PROPS section.

Records: Fixed number of records
Record count: 1
Items per record: 2

Parameters

No.	Name	Description	Type	Dimension	Field	Metric	Lab	Default
1	`RS`	A real positive value that defines the dead oil GOR for all oil PVT tables in the model	DOUBLE	GasDissolutionFactor	Mscf/stb	sm3/sm3	scc/scc	None
2	`PB` manual: `PRESS`	A real positive value that defines that saturation pressure (bubble point pressure) for all the oil PVT tables in the model.	DOUBLE	Pressure	psia	barsa	atma	None

Example

The example sets the dead oil GOR to 5 scf/stb and the bubble point pressure to 14.7 psia.
--
-- DEAD OIL PVT CONSTANT GOR AND SATURATION PRESSURE
--
RSCONST
-- RS PSAT
-- MSCF/STB PSIA
-- -------- ------
0.0050 14.7 /

Manual source: parts/chapters/subsections/8.3/RSCONST.fodt