Tamarama-2 encounters strong gas shows

Since the last weekly report, the well was drilled from 1900 m measured depth below rotary table (MDRT) to the depth of 2422 m MDRT, as at 6.00 am EST on 26 April, 2018, and is drilling ahead within the Patchawarra Formation target section in the 6-1/8 in. hole.

Based on the preliminary information from drill cuttings and mud log gas readings, the Toolachee Formation was encountered at around 2342.75 m MDRT (2181.1 m subsea True Vertical Depth) and the Patchawarra Formation was encountered at around 2390 m MDRT (2382.3 m SS TVD) which are approximately 29m updip from the Tamarama-1 Toolachee Formation and Patchawarra Formation tops. Elevated gas readings have been recorded over the Toolachee Formation and so far with several gas peaks over the numerous sandstone intervals. 

The intervals with notably high gas readings are:

• 2342 - 2349 m MDRT: SANDSTONE, SILTSTONE and COAL with gas peak of 81.9 units over the background gas of 22.6 units;
• 2439 - 2367 m MDRT: SANDSTONE with MINOR interbedded SILTSTONE and COAL with gas peak of 113.4 units over the background gas of 13.2 units;
• 2379 - 2388 m MDRT: SANDSTONE and SILTSTONE with gas peak of 123.1 units over the background gas 32.9 units;
• 2397 - 2407 m MDRT: SANDSTONE with minor SILTSTONE and COAL with gas peak of 61.8 units over the background gas of 15.8 units.

The significance of these gas shows will be further evaluated by electric logs to be undertaken after reaching the total depth, currently predicted at approximately 2600 m MDRT.

Tamarama-2 has surface location approximately 925 m ESE from Tamarama-1 and is being drilled as a deviated hole to penetrate the mid-target reservoir at approximately 640m ESE from Tamarama-1 vertical well. The well has been specifically designed to optimise subsequent fracture stimulations of the Permian Tollachee-Patchawarra gas reservoirs.

Managing Director Scott Brown commented: “While we are still drilling and later will be running electric logs and evaluating the significance of the gas shows seen in the well, Tamarama-2 appears to be a very encouraging result, and is consistent with the pre-drilled prediction.”

Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/26042018/tamarama-2-encounters-strong-gas-shows/