Japan-based upstream Inpex said Monday that it made a gas discovery at the Lasseter-1/ST1 exploration well in block WA-274-P off the coast of Western Australia.
Estimated reserves have not been released yet.
The hydrocarbon pay at the well is approximately 262 feet (80 meters) thick.
Inpex conducted a preliminary evaluation of wireline log data and confirmed the hydrocarbon pay in a 1,312 feet (400 meter) long gross gas condensate section.
The company also recovered gas and condensate samples from the well.
The well reached its target depth of 17,483 feet (5,329 meters) this month.
Inpex has been drilling at the block since March 2014 through its its wholly-owned subsidiary Inpex Browse E&P.
The block is located about 310 miles (500 kilometers) north-northeast of Broome, Western Australia and 31 miles (50 kilometers) west-northwest of the Inpex operated Ichthys gas-condensate field.
Inpex said the WA-274-P block and the surrounding area are thought to have a high exploration potential.
Inpex Browse holds a 20 percent participating interest in WA-274-P.
Australian upstream Santos is the operator of the block and holds a 30 percent interest. Chevron holds a 50 percent interest.
The WA-274-P covers about 1,065 square miles (2,760 square kilometers) with a water depth ranging from 984 feet (300 meters) to 1,640 feet (500 meters).