AQUCT
Recognised by the OPM Flow parserGRIDPROPSSOLUTIONSCHEDULE
Variant 1 — GRID section
The AQUCT keyword defines Carter-Tracy112 Carter, R. D. and Tracy, G. W. “An Improved Method for Calculating Water Influx,” Transactions of AIME (1960) 219, 215-417. 113 Van Everdingen, A. & Hurst, W.,.The Application of the Laplace Transformation to Flow Problems in Reservoirs. Petroleum Transactions, AIME (December, 1949).analytical aquifers, the properties of the aquifer, including the Carter-Tracy aquifer influence function associated with the aquifer, defined by the AQUTAB keyword in the PROPS section.
Carter, R. D. and Tracy, G. W. “An Improved Method for Calculating Water Influx,” Transactions of AIME (1960) 219, 215-417.
Van Everdingen, A. & Hurst, W.,.The Application of the Laplace Transformation to Flow Problems in Reservoirs. Petroleum Transactions, AIME (December, 1949).
Each row entry in the AQUCT keyword defines one Carter-Tracy aquifer.
Notes:
The keyword is followed by up to NANAQ records as defined on the AQUDIMS keyword in the RUNSPEC section
Each record is terminated by a “/” and the keyword should be terminated by a “/”.
Note
OPM Flow includes the infinite acting Carter-Tracy aquifer influence table as a default for table number one; thus data entered on AQUTAB keyword starts from table number two.
In order to full define a Carter-Tracy aquifer one has to define the aquifer properties via the AQUCT keyword, the Carter-Tracy influence function via the AQUTAB keyword in the PROPS section (AQUTAB – Define Carter-Tracy Aquifer Influence Functions), if the default infinite acting table is not being employed, and finally, how the aquifer is connected to the reservoir using the AQUANCON keyword in the GRID or SOLUTION sections.
- Records
- One or more records, each terminated by
/ - Items per record
- 13
Parameters
| No. | Name | Description | Type | Dimension | Field | Metric | Lab | Default |
|---|---|---|---|---|---|---|---|---|
| 1 | AQUIFER_manual: AQUID | A positive integer greater than or equal to one and less than or equal to NANAQU on the AQUDIMS keyword in the RUNSPEC section, that defines the Carter-Tracy aquifer number. | INT | 1 | ||||
| 2 | DAT_manual: DATUM | DATUM is a single positive value that defines the Carter-Tracy reference datum depth for PRESS. | DOUBLE | Length | feet | m | cm | None |
| 3 | P_manual: PRESS | PRESS is a single positive value that defines the aquifer pressure at DATUM. If PRESS is defaulted then the simulator will set the aquifer’s initial reservoir pressure to be in equilibrium with the cells the aquifer is contacted to. | DOUBLE | Pressure | psia | barsa | atma | 1* |
| 4 | PERM_manual: PERM | PERM is a real positive number that assigns the permeability to the aquifer. | DOUBLE | Permeability | mD | mD | mD | None |
| 5 | PORO_manual: PORO | PORO is a real positive number greater than zero and less than or equal to one that assigns the porosity to the aquifer. | DOUBLE | 1 | dimensionless | dimensionless | dimensionless | None |
| 6 | C_manual: RCOMP | RCOMP is a real number defining the total (rock and water) compressibility (Ct) at the DATUM pressure. | DOUBLE | 1/ | 1/ | 1/ | 1/ | None |
| 7 | RADmanual: RE | RE is a real positive number that defines the Carter-Tracy aquifer external radius. | DOUBLE | Length | feet | m | cm | None |
| 8 | THICKNESS_manual: DZ | DZ is a real positive number that defines the Carter-Tracy aquifer average net thickness. | DOUBLE | Length | feet | m | cm | None |
| 9 | INFLUENCE_manual: ANGLE | ANGLE is a real positive number that defines the angle of influence, that is the angular connection between the aquifer and the hydrocarbon reservoir. A value of 360 degrees, the default value, indicates that the aquifer completely surrounds the hydrocarbon reservoir. | DOUBLE | 1 | degrees | degrees | degrees | 360.0 |
| 10 | TABLE_manual: PVTNUM | PVTNUM is positive integer greater than zero and less than the NTPVT variable on the TABDIMS keyword in the RUNSPEC section, that defines the PVTW table allocated to the Carter-Tracy aquifer. | INT | 1 | ||||
| 11 | TABLE_manual: AQUTAB | AQUTAB is positive integer greater than zero and less than the NIFTBL variable as declared on the AQUDIMS keyword in the RUNSPEC section, that defines the AQUTAB table allocated to this Carter-Tracy aquifer. The default value of one sets the internal infinite acting Carter-Tracy aquifer influence table not the first table in the AQUTAB keyword in the PROPS section The first table in the AQUTAB keyword is considered to be table number two. The internal table, AQUTAB equal to one, is based on the Radial Flow, Constant Pressure and Constant Terminal Rate Cases for Infinite Reservoirs (Table I) in Van Everdingen and Hurst's 114 Van Everdingen, A. & Hurst, W.,.The Application of the Laplace Transformation to Flow Problems in Reservoirs. Petroleum Transactions, AIME (December, 1949).paper. Van Everdingen, A. & Hurst, W.,.The Application of the Laplace Transformation to Flow Problems in Reservoirs. Petroleum Transactions, AIME (December, 1949). | INT | 1 | ||||
| 12 | INI_manual: SALTCON | SALTCON is a real positive number that defines the initial salt concentration in the aquifer, for when with simulator's Brine Model has been activated via the BRINE keyword in the RUNSPEC section. This variable is ignored by OPM Flow. | DOUBLE | Concentration | lb/ | kg/ | gm/ | 0.0 |
| 13 | TEMP_manual: TEMP | TEMP is a real positive number that defines the initial temperature of the aquifer at DATUM for use with OPM Flow's thermal option. The THERMAL keyword in the RUNSPEC section must be activated to use this option. | DOUBLE | Temperature | °F | °C | °C | 1* |
Example
Given the following grid and aquifer dimensions in the RUNSPEC section:
--
-- MAX MAX MAX
-- NDIVIX NDIVIY NDIVIZ
DIMENS
20 1 5 /
-- AQF AQF AQF AQF AQF AQF AQF AQF
-- MXAQN MXNAQC NIFTBL NRIFTB NANAQU NCAMAX MXNALI MXAAQL
AQUDIMS
1* 1* 5 100 1 1* 1* 1* /
And the AQUTAB keyword in the PROPS section
--
-- CARTER-TRACY AQUIFER INFLUENCE TABLES
-- (STARTS FROM TABLE NO. 2, AS DEFAULT IS TABLE NO. 1)
--
AQUTAB
-- DIMLESS DIMLESS
-- TIME PRESSURE
-- ------- ---------
0.01 0.112
0.05 0.229
0.10 0.315
0.15 0.376
0.20 0.424
0.22 0.443
0.24 0.459
0.26 0.476
0.28 0.492
0.30 0.507
0.32 0.522
0.34 0.536
0.36 0.551
0.38 0.565
0.40 0.579
0.42 0.593
0.44 0.607
0.46 0.621
0.48 0.634
0.50 0.648
0.60 0.715
0.70 0.782
0.80 0.849
0.90 0.915
1.00 0.982
2.00 1.649
3.00 2.316
5.00 3.649
10.00 6.982
20.00 13.649
30.00 20.316
50.00 33.649
100.00 66.982
200.00 133.649
300.00 200.316
500.00 333.649
1000.00 666.982 /
The Carter-Tracy aquifer is defined in the GRID or SOLUTION sections as:
-- ==============================================================================
--
-- SOLUTION SECTION
--
-- ==============================================================================
SOLUTION
--
-- CARTER-TRACY AQUIFER DESCRIPTION
--
-- ID DATUM AQF AQF AQF AQF AQF AQF INFL PVT AQU
-- NUM DEPTH PRESS PERM PORO RCOMP RE DZ ANGLE NUM TAB
--
AQUCT
1 2000.0 269 100.0 0.30 3.0e-5 330 10.0 360.0 1 2 /
/
And the connection of the aquifer is set in the GRID or SOLUTION sections as:
--
-- ANALYTIC AQUIFER CONNECTION
--
-- ID ---------- BOX --------- CONNECT AQF AQF ADJOIN
-- NUMBER I1 I2 J1 J2 K1 K2 FACE INFLX MULTI CELLS
AQUANCON
1 1 1 1 1 1 1 J- 1.0 1.0 'NO' /
/
Here one Carter-Tracy aquifer is connected to a single cell (1, 1, 1) at the J- face (or X- face) of the cell.
| Note OPM Flow includes the infinite acting Carter-Tracy aquifer influence table as a default for table number one; thus data entered on AQUTAB keyword starts from table number two. |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|Related keywords
- Requires
AQUDIMS
Manual source: parts/chapters/subsections/6.3/AQUCT.fodt
Variant 2 — PROPS section
The AQUCT keyword defines a Carter Tracy aquifer, the properties of the aquifer, including the Carter-Tracy aquifer influence function associated with the aquifer, defined by the AQUTAB keyword in the PROPS section.
See AQUCT – Define Carter-Tracy Analytical Aquifersin the GRID section for a full description
- Records
- One or more records, each terminated by
/ - Items per record
- 13
Related keywords
- Requires
AQUDIMS
Manual source: parts/chapters/subsections/8.3/AQUCT.fodt
Variant 3 — SOLUTION section
The AQUCT keyword defines a Carter Tracy aquifer, the properties of the aquifer, including the Carter-Tracy aquifer influence function associated with the aquifer, defined by the AQUTAB keyword in the PROPS section.
See AQUCT – Define Carter-Tracy Analytical Aquifersin the GRID section for a full description
- Records
- One or more records, each terminated by
/ - Items per record
- 13
Related keywords
- Requires
AQUDIMS
Manual source: parts/chapters/subsections/10.3/AQUCT.fodt
Variant 4 — SCHEDULE section
The AQUCT keyword defines Carter-Tracy298 Carter, R. D. and Tracy, G. W. “An Improved Method for Calculating Water Influx,” Transactions of AIME (1960) 219, 215-417. analytical aquifers, the properties of the aquifer, including the Carter-Tracy aquifer influence function associated with the aquifer, defined by the AQUTAB keyword in the PROPS section.
Carter, R. D. and Tracy, G. W. “An Improved Method for Calculating Water Influx,” Transactions of AIME (1960) 219, 215-417.
See AQUCT – Define Carter-Tracy Analytical Aquifersin the GRID section.
- Records
- One or more records, each terminated by
/ - Items per record
- 13
Related keywords
- Requires
AQUDIMS
Manual source: parts/chapters/subsections/12.3/AQUCT.fodt