Beibuan Trough

Santos has a 55% operating interest in Block 101-100/04 in the Beibuan Trough, offshore northern Vietnam. Singapore Petroleum Company Limited holds the remaining 45% interest. A farmout of 50% equity in the block to Salamander is presently awaiting Government of Vietnam approval.

To date, one sub-commercial gas discovery has been made in the block with the drilling of the Ha Mai well in 2009. A further well targeting an oil target at the Cat Ba prospect is planned for 2011.