TULLOW OIL revenue for the last year amounted to 1.38 B CHF, the most of which — 1.13 B CHF — came from its highest performing source at the moment, Ghana, the year earlier bringing 1.43 B CHF. The greatest contribution to the revenue figure was made by Ghana — last year it brought TULLOW OIL 1.13 B CHF, and the year before that — 1.43 B CHF.