I have installed Visual Studio 2012 Express for Web and need to install the Oracle Developer Tools for Visual Studio, but when I run the ODT installation, it does not pick up any visual studio installation.
Is there a work around for this issue, or will I need to change to a different version of Visual Studio?
You'll need to install a full version of Visual Studio. Per the readme:
Note: Visual Studio Express Editions are not supported with the Oracle Developer Tools. However, ODP.NET is supported with Visual Studio Express Edition.
So, you can still use ODP and code things "manually" to access the database, but the Oracle Developer Tools won't work.