Africa's oil and gas industry continues to attract global investment, despite the challenges which include a sharp downturn in crude prices over the last year. CNBC Africa brings you highlights from the 22nd Africa Oil Week that recently took place in Cape Town, South Africa and discussed the industry landscape with Edward Voelcker, Partner in Energy and Natural Resources at KPMG Nigeria and Gor Semelang'o, CEO of PetroKenya Oil Company.