The two separate farm-out agreements will give Origin exposure to tight gas sand, shale and deep coal plays in South Australia.
Joint venture partners have planned a two-stage A$252 million work programme which will involve the drilling of at least 15 wells and the acquisition of 2D and 3D seismic.
Senex will be carried for its share of the first A$185 million work programme, with each joint venture partner to contribute another A$67 million on a participating interest basis.
Senex