The development stages:Exploration drilling/2015-05.Block 28 was part of Ecuador's XI Round and was directly awarded to Petroamazonas for direct negotiation with partners to develop it. The block is estimated to hold between 30-50Mb of reserves, according to Petroamazonas. The company will explore and develop the block along with ENAP Sipetrol and Belorusneft. Expected investment for the exploration phase is US$25mn and development costs are expected to amount to US$375mn.