which company ?

noble -no
india oil -no
repsol -perhaps, but r mainly in nth africa (within africa itself)
petronas -perhaps, has something in africa but not really known for it.
lukoil -no... into production and refining.
STATOIL -possibly; not a big player in africa, but has a few interests and r also over the other side of Madagascar in Mozambique.
valero energy -no... into refineries.
petrobas -perhaps, but website would not open for worldwide operations.
ENI -possibly, as have quite some interests in africa.
CONOCOPHILLIPS -possibly, has some interests in africa.
CHEVRON -possibly; is 3rd largest oil producer in Nigeria.
CHINA NATURAL PETROLEUM -possibly, as does have african interests.
sinopec group -perhaps, but not known for african interests.
BP -possibly, but not as big a player in africa as some others.
exxon mobil -perhaps, but current african interests dont seem as good as others.
ROYAL DUTCH SHELL -possibly, as are in africa already.