You can register your partial views with episerver by implementing interface EPiServer.Web.Mvc.IViewTemplateModelRegistrator. The implementation can look something like:

viewTemplateModelRegistrator.Add(typeof(PageData),
 new DataAbstraction.TemplateModel()
 {
       Name = "PageTeaser",
       Description = "Displays a teaser of a page.",
       Path = "~/Views/Shared/PageTeaser.cshtml",
       Inherited = true
   }
);

the above code registers a partial view for the modelclass PageData (in your case it should be your block model). Property Path is only nessecary if you do not follow naming conventions (so in case above Path could have been omitted).