Sapex added the second part of the survey, a regional 2D program aimed at determining the southward extension of the Boorthanna Trough, will start in mid-July.

The interruption will not affect the processing of data from the detail survey over the next 3-4 months that will be used to determine locations for Sapex's two-well drilling program, targeted to start near the end of 2008.

The survey is the region's first such survey since the early 1980s.

Adelaide-based Sapex holds a 100% interest in the under-explored basin, with 65,000 square kilometres under seven granted PELs.