- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Petroleum production in Africa for 1958 established a new all-time high of 31,930,880 bbls. which represents an increase of 72% over 1957. Egypt alone recorded a 33% increase in its production over the preceding year, and Egypt still dominates the production picture. However, Egyptian production represented only 69% of the Africa total in 1958, in contrast to a figure of almost 90% in 1957. Gabon, Algeria, and Nigeria were largely responsible for this change. One hundred forty-one exploratory wells were completed in Africa in 1958, of which 18% were successful. Eight discoveries were reported from Nigeria, 6 from Algeria, 4 from Libya, 3 from Gabon, 2 from Egypt, and 1 each in Angola and Morocco. Exploratory wells were completed but without success in Cameroon, Congo, Madagascar, Senegal, Somalia, British Somaliland, and Tunisia. One hundred ninety-one development wells were completed during the year, 74% of which were successful. A total of 2,214,392 ft. of hole was drilled in Africa in 1958, and at the end of the year 90 rigs were in operation. Geological-geophysical exploratory work was particularly extensive in Algeria, Libya, Madagascar, Morocco, Nigeria, Senegal, and Somalia. Party-months of various types of exploratory work for the whole of Africa were as follows: surface geology - 629, seismograph - 774, gravity 313, ground magnetometer - 70, air-borne magnetometer - 11, and structure drill - 66. These represent all-time highs for surface geology, seismograph, gravity, and magnetometer operations.