Green Rock Energy Limited

Oil Basins Limited (ASX:OBL), as designated Operator on behalf of the Backreef Area Joint Venture (OBL net 80% and Green Rock Energy Limited (ASX:GRK) net 20% beneficial interests respectively), wishes to make the following Operations Report #5 concerning the East Blina-1 petroleum exploration well, within Production Licence L6, Canning Basin.

The Company, as designated Operator on behalf of the Backreef Area Joint Venture (OBL net 80% and Green Rock Energy Limited (ASX:GRK) net 20% beneficial interests respectively), wishes to make the following weekly Operations Report #4 at the East Blina-1 petroleum exploration well, within Production Licence L6, Canning Basin

Oil Basins Limited (ASX:OBL), as designated Operator on behalf of the Backreef Area Joint Venture (OBL net 80% and Green Rock Energy Limited (ASX code GRK) net 20% beneficial interests respectively), wishes to make the following weekly Operations Report #3 at the East Blina-1 petroleum exploration well, within Production Licence L6,

Oil Basins Limited (ASX:OBL), as designated Operator on behalf of the Backreef Area Joint Venture (OBL net 80% and Green Rock Energy Limited (ASX:GRK) net 20% beneficial interests respectively), wishes to make the following Operations Report #2 at the East Blina-1 petroleum exploration well, within Production Licence L6, Canning Basin.

Oil Basins Limited (ASX:OBL) wishes to make the following ASX Announcement, so as to keep the market fully informed. The Company, as designated Operator on behalf of the Backreef Area Joint Venture (OBL net 80% and Green Rock Energy Limited (ASX:GRK) net 20% beneficial interests respectively) wishes to make the following Operations Report #1 at the East Blina-1 petroleum exploration well, within Production Licence L6, Canning Basin.

Oil Basins Limited (ASX:OBL) wishes to make the following ASX Announcement, so as to keep the market fully informed. The Company, as designated Operator on behalf of the Backreef Area Joint Venture, has since mid-August 2012 been advancing approvals for the drilling of the East Blina-1 petroleum exploration well within L6 in the Canning Basin. As previously advised site clearing operations commenced on 6 October 2012 and rig-up with the Dynamic Drilling Rig #17 commenced on 14 October 2012.

Further to the earlier ASX Release dated 14 August, 2012, Oil Basins Limited (ASX:OBL) wishes to make the following ASX Announcement, so as to keep the market fully informed. The Company, as designated Operator on behalf of the Backreef Area Joint Venture (OBL net 80% and Green Rock Energy Limited (ASX:GRK) net 20% beneficial interests respectively) has now significantly advanced its preparations for the proposed 2012 Canning Basin drilling operations.

Oil Basins Limited (ASX:OBL) is pleased to present its June 2012 Quarterly Report, report includes; Operations report, operated and non-operated assets highlights, summary of test results, corporate update, news business and 2012 forward program.

Oil Basins Limited (ASX:OBL) wishes to make the following announcement so as to keep the market fully informed. The Company, as operator on behalf of the Backreef Joint Venture - OBL group net 80% and Green Rock Energy Limited (ASX:GRK) group net 20%*, provides the following update on cased hole production testing operations at the Backreef-1 well.

Oil Basins Limited (ASX:OBL) wishes to make the following announcement so as to keep the market fully informed. The Company, as operator on behalf of the Backreef Joint Venture - OBL group net 80% and Green Rock Energy Limited (ASX:GRK) group net 20%*; wishes to advise that all test equipment arrived on site late Sunday 20 May 2012, but due to a combination of downtime of the Australian Drilling Services (ADS) Rig#2 and the unexpected difficult drilling of the cement plug (now successfully completed this morning), we now anticipate that the well test operations will commence on Thursday 24 May 2012.