The closing date for New Zealand's Northland block offer has been extended to 18 August 2010, New Zealand's Minister for Energy Gerry Brownlee has announced.
The move follows the emergence of new seismic data that will need to be interpreted.
There are no other changes to other blocks on offer, the minister said.
The Raukumara block offer closing date remains 28 January 2010.
The offshore Northland basin lies to the west of the upper part of the North Island of New Zealand next to the hydrocarbon-producing Taranaki Basin.
In the past three decades the region has seen extensive seismic survey coverage and the drilling of two wells in the area.