Well ... OracleVM is basically a Xen server with some extra management layer on top and SnapProtect appears to support Xen. And it never says "Citrix XenServer" but rather "Xen Server" which appears like they do support generic Xen. So it is quite probable that it will work. Not that all features are available (e.g. snapshots are apparently supported for Vmware/Hyper-V only).
I guess you could ask for a trial version and test.