Ann: Cyrene-1 Update of EP438 Activities , page-16

Don't forget DCA Rig 7 also drilled Dunnart #1 and Dibblers #1 for KEY about two years ago.

The first well encountered some delays but nothing too out of the ordinary in the o&g gas, the second well went like a dream not counting the final result with it being P&A.

Note that Waugh #1 is testing the same lead that Dunnart #1 was drilled into. I'm curious to know how far Waugh #1 will be from Dunnart #1 as I don't recall reading anything on that point.

From the original P&A decision on Dunnart #1:

The primary objective of the well was the Bookara Sandstone. Good fluorescence shows, an indication of the presence of oil, were seen in up to 80% of the sand whilst drilling through the Bookara. A full suite of wireline logs was run at total depth to evaluate the well.

Interpretation of the logs suggest that the reservoir sands are tight and as such the joint venture has decided to plug and abandon the well.


And a recent update on the intention to drill Waugh #1 updip of Dunnart #1:

Key’s technical team has identified that both conventional and unconventional pay has been missed in the Dunnart-1 well, drilled by the previous operator. An estimated section of 10-15m of carbonaceous shale and interbedded sands within the Cattamarra Coal measures contained readings of both methane and ethane with anomalous methane level readings up to 200 ppm.

The EP437 Joint Venture has also interpreted that that an induction resistivity log (instead of modern resistivity electric wireline logging tools) was used incorrectly by the previous operator to calculate oil saturations within the Bookara Sandstone at Dunnart-1. This well log is typically not used to evaluate for the presence of hydrocarbons in water based muds and a review of the well data indicates that 5 metres of net oil pay within the Bookara sandstone sequence was encountered in Dunnart-1. A review of the Dunnart-1 mudlog indicates that there were oil shows encountered right through the Bookara Sandstone sequence indicating, a much larger potential pay interval.