The developments are about 30km offshore and contained within two adjacent licences, WA-35-L and WA-55-L.
The plan includes provision for six infill wells and two new appraisal wells, one in each block, which would be completed for production dependant on exploration success.
The work is ideally planned to start early in the new year, assuming approvals and rig availability, and could take anywhere up to five years.
Each well would take 60-80 days to drill and complete, however because of various factors including rig availability and well performance the activity may be completed over various phases.
Production at Coniston only began earlier this year, two years past the originally targeted deadline set by Inpex (47.499%) and the then Apache Energy (52.501% and operator).
Coniston and Novara are tieback fields to the subsea infrastructure already in place for the Van Gogh field development, which started production in 2010.
The projects share the FPSO Ningaloo Vision which was modified for the new subsea development during a scheduled dry-dock appointment in Singapore last year.
The Ningaloo Vision has capacity to process 150,000 barrels of liquids per day, including 63,000 bbl of oil per day, and can store 540,000bbl of oil.
The subsea development consists of six Coniston production wells and one Novara production well, connected to a new subsea manifold for Coniston and a pipeline end manifold for Novara.
Development commenced in 2011 and was originally expected to be completed in 2013, which was later pushed out to 2014 and into 2015.
Coniston is expected to flow at 18,000bopd but at various times during its development was defined as a 22,000bopd field.
Novara was discovered in 1989 and Coniston was discovered in 2000 and appraised in 2009.
Coniston covers an area of 45sq.km straddling blocks WA-35-L and WA-55-L where the water is 380m deep. The fields are located 6km north of Van Gogh.
Van Gogh was Apache's first FPSO-based field development in Australia, and is now operated by Quadrant, after Apache sold out of Australia.