A link has been posted on the web that appears to show the giant 8bn barrels of oil Tengiz field, and a nearby area labelled IV. It does appear as though this IV zone may cover some of Roxi Petroleum's BNG block (also known as Ayrshagyl).
As a way of at least partially verifiying this data, the recently discovered Taq Taq block in Kurdistan is clearly shown on a different page accessed from the above link ( http://www.scotforth.com/index.php?page=kurdistan )