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Successful Corvus-2 appraisal well discovers significant gas resource

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Santos has released a statement announcing the successful appraisal of the Corvus field, with Corvus-2 confirming a significant gas resource in the Carnarvon Basin, which is located offshore Western Australia.

The well is located in petroleum permit WA-45-R, in which Santos holds 100% interest. It is approximately 900 km northwest of Dampier in Commonwealth waters, and reached a total depth of 3998 m. The well intersected a gross interval of 638 m – one of the largest columns ever discovered across the North West Shelf.

According to the statement, wireline logging to date has confirmed 245 m of net hydrocarbon pay across the target reservoirs in the North Rankin and Mungaroo formations, between 3360 and 3998 m.

Santos claims that higher permeability zones than encountered in Corvus-1 have been observed from initial pressure sampling completed in the well. Compared to Corvus-1, initial samples acquired from Corvus-2 indicate a much higher condensate gas ratio of up to 10 bbl/million ft3, and a similar CO2 content of 7%.

Corvus-2 is around 3 km southwest of Corvus-1, which was drilled in 2000, and the water depth at location is 63 m. The field is approximately 28 km from the Reindeer platform, which delivers gas to the Devil Creek domestic gas plant near Karratha, and about 62 km to a Varanus Island tie-in point. Santos holds a 100% interest in all of these facilities.

According to the statement, the well was drilled with the use of a jack-up mobile offshore drilling unit – Noble Tom Prosser – and will be plugged and abandoned as planned once logging operations are finished.

Kevin Gallagher, the Managing Director and CEO of Santos, said: “Corvus-2 has delivered a fantastic result and has opened up a number of additional exploration opportunities in the region.

“It is particularly exciting to have realised a higher liquids content and significantly bigger resource volume than we expected.

“Corvus could be tied back to either our Devil Creek or Varanus Island gas plants, where it has the potential to increase the utilisation of our existing facilities as well as provide backfill and extend plateau well into the 2030s.

“It’s a great start to our 2019 offshore drilling campaign, and it also highlights the value of the Quadrant acquisition and our strategy of pursuing upstream brownfield growth opportunities around existing infrastructure.

“The rig will now move north to commence the Dorado appraisal program.”

Read the article online at: https://www.lngindustry.com/liquid-natural-gas/16042019/successful-corvus-2-appraisal-well-discovers-significant-gas-resource/

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