On 6 September the Annie gas field discovery offshore Australia was announced. The Annie-1 wellbore has now been securely plugged with downhole cement plugs installed. Abandonment of the well has been delayed following failure of 2 of the Diamond Offshore Ocean Monarch drilling rig’s 8 mooring chains.
This incident has required repair to the affected chains and inspection of the remaining 6 chains. It is expected this work will be completed later this week, at which point final abandonment operations will resume, weather permitting. Abandonment of Annie-1 is now expected to be completed within the next week.
Analysis into the root cause of the failure of the 2 mooring chains may take more than a month to complete. Therefore, Cooper Energy has proposed to defer the drilling of the Elanora-1 well that was scheduled to follow Annie-1. Drilling of Elanora-1 will be considered in the context of future campaigns.
Cooper Energy Managing Director, David Maxwell, said: “While we are closing the drilling campaign early after the completion of one well, we are pleased with its outcome. The discovery of the Annie gas field has added to our portfolio of development opportunities which can add to our reserves and production growth. Elanora remains as an exploration target to test in the future”.
Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/16092019/cooper-energy-plugs-annie-1-wellbore/