“We reached basement several days ago, TD was 772m. Rig 1 has done very well and will now head to Kaimiro-Ngatoro for some workover operations,” Greymouth chief operating officer John Sturgess told EnergyReview.Net.
Although some logs were run, nothing worthwhile was found. “It will take approximately six months to review data and decide on further commitments for the licence (PEP 38739),” he said.
A small rig was used to set the initial casing string, but a specially designed workover rig - a certified design based on modifying parts of a fire truck – was moved in to complete the drilling.
Tiwakawaka-1 was only the second well in the area after the 1964 Kiore-1 well drilled by Shell, BP Todd. Tiwakawaka was identified as a result of a 2003 seismic program, though Greymouth said formations and hence target depths could not be predicted with any greater accuracy.
Commentators said Greymouth might have been targeting shallow trapped pockets of hydrocarbons, “leakage” from existing fields, as most of PEP 38739 lies to the east of the Taranaki Fault with no source rock underneath.
