To determine which patch to use, you can simply check the framework version in your instance by using http://host:port/OA_HTML/OAInfo.jsp, then choose the matched one.
11.5.10K = patch 4045639
11.5.101CU = patch 4141787
11.5.102CU = patch 4573517
11.5.103CU = patch 4725670
It would be interesting to have a survey regarding what framework versions are being used for OAF development. Please post your current development version in a comment; I will publish the results at a later stage.
Checkout Metalink note 416708.1 for the up to date list of OAF releases.