"The most likely timing for deals on both assets is 2018. We estimate the sale of a 20pc stake in Tullow Ghana could net $1bn, while a substantial farm down in Kenya should secure a full development carry through first oil in 2022," said the Barclays note. Tullow offers investors exposure to rising low-cost oil production in Ghana that is generating free cash flow, while a further phase of medium-term growth comes from Uganda and Kenya, it said.