Negative Support for merger.  Well logging covers many many more disciplines than electric line.  Well logging covers mudlogging, LWD, DST, etc., surely you don't plan on merging those into well logging?  Ideally well logging should look something like Well intervention where it gives brief snippets of different well logging methods and links over to them.  I think the data in well logging should be merged into the other wikipedia entries.  Finally, electric line does not always produce a log.  Perforating services and mechanical services, like those used to set plugs, packers, and cement, do not necessarily produce any well logs at all, yet they are very important aspects of wireline operations.  Entire wireline companies never produce electric line logs (namely, plug and abandonment companies)