Yeah BLOB is the data type you need. And it's not specific to Oracle database only. Any mature Database Management System must have a blob type.
By the way, you didn't tell us which database management system you are using.
As Fdeveloper said, you may need to leave access, if that's what you are using.
You may also consider Firebird(
http://firebirdsql.org) as it has an embedded version that gives you the compactness of small databases like access and Sqlite and also the power of big server databases like Oracle and MSSQL plus it takes only 1.44Mb of hard disk space and can be bundled and deployed with your application.