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Coro Energy's drill test results in "successful appraisal" of the Mako Gas Field

10:27, 22nd November 2019
Francesca Morgan
Company News
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Southeast Asian focused upstream oil and gas firm, Coro Energy (CORO) FOLLOW, report a “highly successful appraisal” of the Mako gas field following concluded drill stem tests at its Tambak-1 well.

The Tambak-1 well encountered 24m of intra-Muda sandstones at a depth of 389m and a 17 metre upper section of high permeability and good porosity sandstone, together with a lower sandstone unit of 7 metres.

The testing at the Tambak-1 well confirmed a common gas-water contact at 389 metres true vertical depth subsea across the field.

This culminated in a drill stem test showing a maximum flow rate of 11.4 MMscf/d which confirmed the potential deliverability of the Mako reservoir.

Chief Executive of Coro, James Menzies, pinpointed the DST as particularly significant, commenting, “This is in contrast to the previous DST at Mako South-1 which saw a substantially larger section tested in open hole. This provides a valid completion alternative for field development.”

CORO price chartThe well was further deepened beneath the Mako field to a depth of 1,543 mTVDSS to test the Tambak exploration prospect.

Whilst the group identified multiple sandstone intervals in the Lower Gabus section, it was ruled that the sandstones have low gas saturations and poor reservoir characteristics.

The drilling campaign was completed within the expected timeframe and budget, and currently, the well is being plugged and abandoned as planned, prior to the Asian Endeavour 1 rig being demobilised.

“We are delighted with the additional resource that has been proved up in the Mako field as a result of this campaign which we believe enhances the commercial attractiveness of the project. 

Coro management estimate that the campaign has demonstrated a gross resource addition of at least 100 Bcf and we look forward to the independent assessment of field resources which will follow,” added Mr Menzies.

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