The 2D seismic survey will cover about 428km in two areas of the Boorthanna Trough and is the region's first such survey since the early 1980s.

Managing director Andrew Andrewjewskis said half of the seismic work would provide detailed coverage over several leads and prospects in the Boorthanna Trough.

The second part of the survey is a regional 2D program aimed at determining the southward extension of the Boorthanna Trough.

Data recording is expected to start on May 7.

Andrewjewskis said Sapex is aiming to drill two exploratory wells before the end of the year, subject to the completion of processing and interpretation of the data.

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