I thought the following might help, although it is based on WebLogic 6.?.

Regards
Mehregan

Step 2 JDBC connection  Pool setup

1. Run WebLogicServer with cs9316domain as domain name and
cs9316server as server  name.
2. Go to JDBC/Connection Pools and then select Configure a
New JDBC Connection Pool in the right frame to
create and configure a Connection Pool.
3. Set the following information:

Name: CS9316DataPool
URL:
jdbc:oracle:thin:@thylacine.cse.unsw.edu.au:1521:cse8
Driver Classname: oracle.jdbc.driver.OracleDriver
Properties:
user=%YourOracleUsername%
password=%YourOraclePassword%
dll=ocijdbc8
protocol=thin
4. Click Create.
5. Click on the Connections tab and set Initial Capacity to
1 connections, Maximum Capacity to 5 and Capacity
Increment to 1. Then click Apply.
6. Deploy this Connection Pool on your server by clicking on
the Targets. You will then see your server in the
Available view. Highlight it and click the right arrow button
to move it over to the Chosen view. Then click Apply.
The Connection Pool is now active. Now you can create  and
configure the DataSource.