WELOPEN

Recognised by the OPM Flow parserSCHEDULE

The WELOPEN keyword defines the status of wells and well connections, and is used to open and shut previously defined wells and well connections without having to re-specify all the data on the well control keywords: WCONPROD, WCONHIST, WCONINJE, or WCONINJH keywords. Note that the well must still be initially fully defined using the WCONPROD or WCONINJE keywords. All the aforementioned keywords are described in the SCHEDULE section.

Notes:

When connections are defined using the COMPDAT keyword they are assigned individual completion numbers in the order they are defined. The connections may then be lumped into completions using the COMPLUMP keyword. The range specified by C1 and C2 refers to all the completions in this range and all the connections contained within these completions.

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

If variables I, J, K, C1 and C2 are all set to a negative number or defaulted with 1* then STATUS is applied to the well and the well connections remain unchanged.

If any of the variables I, J, K, C1 and C2 are set to zero or a positive value then STATUS is applied to the defined well connections and the well status remains unchanged. The defined well connections are those with the specified I, J, K locations and that are in the completion number range specified by C1 and C2. If a zero or negative value is specified for I, J or K then this matches any value for that index. If a zero or negative value is specified for C1 or C2 respectively then no lower or upper bound is applied to the completion range.

See also the COMPDAT keyword to define a well’s connections, the COMPLUMP keyword to group well connections into well completions, the WCONPROD and WCONINJE keywords to define a well’s production and injections targets and constraints. All the aforementioned keywords are described in the SCHEDULE section.

Records

One or more records, each terminated by /

Items per record

7

Parameters

Example

The following example defines two vertical oil wells using the WELSPECS keyword and their associated connection data.
-- WELL SPECIFICATION DATA
--
-- WELL GROUP LOCATION BHP PHASE DRAIN INFLOW SHUT CROSS PRESS
-- NAME NAME I J DEPTH FLUID AREA EQUA. IN FLOW TABLE
WELSPECS
OP01 PLATFORM 14 13 1* OIL 1* STD OPEN NO 1* /
OP02 PLATFORM 28 96 1* OIL 1* STD OPEN NO 1* /
/
--
-- 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
‘*’ SHUT GRUP 1* 1* 1* 1* 1* 200.0 /
/
-- WELL CONNECTION DATA
--
-- WELL --- LOCATION --- OPEN SAT CONN WELL KH SKIN D DIR
-- NAME II JJ K1 K2 SHUT TAB FACT DIA FACT FACT FACT PEN
COMPDAT
OP01 1* 1* 1 10 SHUT 1* 1* 0.708 1* 0.0 1* 'Z' /
OP01 1* 1* 15 30 SHUT 1* 1* 0.708 1* 0.0 1* 'Z' /
OP01 1* 1* 35 90 SHUT 1* 1* 0.708 1* 0.0 1* 'Z' /
OP02 1* 1* 1 10 SHUT 1* 1* 0.708 1* 0.0 1* 'Z' /
/
--
-- DEFINE WELL AND WELL CONNECTIONS FLOWING STATUS
--
-- WELL WELL --LOCATION-- COMPLETION
-- NAME STAT I J K FIRST LAST
WELOPEN
OP01 OPEN /
OP01 OPEN 0 0 1 /
OP01 OPEN 0 0 2 /
OP01 OPEN 0 0 3 /
OP01 OPEN 0 0 4 /
OP02 OPEN /
OP02 OPEN 0 0 0 /
/
In this example the first record for each well in the WELOPEN keyword changes the well status from shut (as per the WCONPROD keyword) to open. Then for well OP01 well connections in layers one to four are opened for flow and all the connections for well OP02 are opened, that is the connections in layers one to ten.
The next example shows the use of the COMPLUMP keyword to group the well connections into well completions for wells OP01, OP02 and OP03, and then use the WELOPEN keyword to open the well and the well completions.
--
-- ASSIGN WELL CONNECTIONS TO COMPLETIONS
--
-- WELL --- LOCATION --- COMPL
-- NAME II JJ K1 K2 NO.
COMPLUMP
OP01 0 0 1 10 1 / COMPLETION NO. 01
OP01 0 0 15 30 2 / COMPLETION NO. 02
OP01 0 0 35 90 3 / COMPLETION NO. 03
OP02 0 0 15 30 2 / COMPLETION NO. 02
OP02 0 0 35 90 3 / COMPLETION NO. 03
OP03 0 0 1 10 1 / COMPLETION NO. 01
OP03 0 0 35 90 3 / COMPLETION NO. 03
/
--
-- DEFINE WELL AND WELL CONNECTIONS FLOWING STATUS
--
-- WELL WELL --LOCATION-- COMPLETION
-- NAME STAT I J K FIRST LAST
WELOPEN
OP01 OPEN /
OP01 OPEN 0 0 0 3 3 /
OP02 OPEN /
OP02 OPEN 0 0 0 2 2 /
OP03 OPEN /
OP03 OPEN 0 0 0 0 0 /
/
Again, the first record of each well WELOPEN keyword changes the well status from shut (as per the WCONPROD keyword) to open. Then for well OP01 well completion number three is opened (connections 35 to 90), completion two (connections 15 to 30) for well OP02 and completion numbers one to three (all the connections) for well OP03. Note that there is no completion number two for OP03 so connections 15 to 30 will not be opened.
Note the last completion number for well OP03 was named completion number three, but it could have been named number two as well. The reason why it was named number three instead of two was because it was assumed (for the example) that layers 35 to 90 represent a particular reservoir, and therefore allowing for the tracking of completions for individual reservoirs, as shown in the example.
This example shows how one can open all the wells and well completions for a given reservoir.
--
-- DEFINE WELL AND WELL CONNECTIONS FLOWING STATUS
--
-- WELL WELL --LOCATION-- COMPLETION
-- NAME STAT I J K FIRST LAST
WELOPEN
‘*’ OPEN /
‘*’ OPEN 0 0 0 3 3 /
OP02 SHUT 0 0 0 0 0 /
OP02 OPEN 0 0 0 2 2 /
/
In this case wells OP01, OP02 and OP03 are opened via completion number three. All the connections for OP02 are then shut, and the connections associated with completion two are opened instead for this well.

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