Energy Gas OilSavannah Energy increases Nigerian oil production by 12% – Half-year results showEditorOctober 2, 2023October 2, 2023 by EditorOctober 2, 2023October 2, 20230222 By Emeka Ugwuanyi Savannah Energy PLC, the British independent energy company, has released its unaudited half-year results for the six months ended 30 June 2023.