ABSTRACT
Washington: Six new-field wildcats were drilled, none was successful. Total exploratory footage was 43,550.
Oregon: Two unsuccessful new-field wildcats were drilled. Exploratory footage totalled 9,720.
California: Four hundred seventy-six exploratory wells with a footage total of 2,453,615 were drilled in 1958. This is a decrease of 18.5% in number of wells and 16.4% in footage below the 1957 totals. Ten new fields, 6 oil and 4 gas, and 29 pools, 25 oil and 4 gas, were discovered. Exploration was 15.3% and 19.7% successful as to wells and footage respectively, compared with 15.6% and 19.3% in 1957. Approximate production in 1958 was 313.7 million bbls. crude oil, down 7.5% from 1957, 28.1 million bbls., natural gas liquids and 436.8 billion CF natural gas. Basement was reached in 35 unsuccessful exploratory holes. There were 50 active exploratory wells at the end of the year.
