For Oracle DB configurations there are two important things to be aware of as shown in the screenshot below from this article which goes into depth regarding Oracle DB use cases. The provider AND the driver must be available on the computer where ABBYY Export is performed. =>https://help.abbyy.com/en-us/flexicapture/12/standalone_administrator/export_bd#export_to_oracle. 

The second thing to be aware of is the provider is found here on the Oracle site here and is not included with Flexicapture by default =>https://www.oracle.com/database/technologies/odac-nuget-downloads.html.