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Continued improvement in gas rate at Mira 6 horizontal well

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Oilfield Technology,


Comet Ridge Ltd has announced that it expects the gas flow rate from the Mira 6/2 vertical-horizontal combination pilot well, in the Bowen Basin in Queensland, Australia, to shortly pass 1.2 million ft3/d (approx. 1.2 TJ/d).

The gas flow rate from the pilot as at 5 June 2018 was 1.193 million ft3/d and continues to increase. At the time of the last update for the Mira 6/2 well on 27 April 2018 the company reported that the well was flowing at 1.0 million ft3/d. However, the well’s performance beyond 1 million ft3/d was being impeded by the small diameter of the Mira pilot’s surface flowline and flare system constructed in 2013.

In recent weeks, Comet Ridge has been working with its Joint Venture partners to resolve the gas production constraint. Recent adjustments to the surface flare facility including cleaning of the flame arrestor have allowed for a slight reduction in bottomhole pressure which has had the immediate result of an approximate 20% increase in the gas rate.

Further work on reducing surface system operating pressure is currently taking place, which, if successful, should lead to even further increase gas rate.

Pump speed has been reduced over the last month with a corresponding decrease in water rate which is in line with Comet’s view that the water production rates in the Mahalo area are low, which from a cost perspective bodes well for the future development of this field. Even with a decrease in pump speed and water rate, gas flow rates have increased demonstrating the excellent flow performance of the reservoir in this area.

Comet Ridge Managing Director, Tor McCaul, said:

“Comet Ridge extrapolated the reservoir gas flow performance limit in the Mira 6/2 well back in April, to be in the range of 1.2 to 1.3 million ft3/d. These results now validate our production model and we are more confident than ever that there is scope for improved performance of the pilot given the response of the wells to the modifications to the surface facilities. With further improvements planned for the flowline restrictions we are hopeful that the gas flow rate will reach and perhaps exceed our estimate of 1.3 million ft3/d.”

Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/11062018/continued-improvement-in-gas-rate-at-mira-6-horizontal-well/

 

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