Drilling activity during 1959 was statistically higher than the preceding year. Discoveries indicate no new major fields but should add substantially to the total reserves of the area.
There were 23 new-field discoveries: 9 in the Upper Cretaceous, 13 in the Lower Cretaceous, and 1 in the Jurassic. Field extension and new-pool discoveries totaled 33.
Total number of wells drilled increased by 274 from the previous year.
Exploratory tests totaled 355, of which 13.8% were successfully completed.
Geophysical activity was 701 crew-weeks. This is a decrease of 8 crew-weeks from 1958, and a continuation of the decline pattern begun in 1953. Core-drill activity totaled 53 crew-weeks, an increase of 35 crew-weeks over 1958.