ODNL Penola No 1 Well: Geological Log from a 1961 South Australian Oil Exploration Drill
South Australia's O.D.N.L. Penola No. 1 Well was drilled in 1961 to a depth of 4,985 feet to test the petroleum potential of the Coonawarra subsurface structure. The operation, conducted by Oil Development N.L., included electric and mud logging, testing, and coring, and documented a sequence of Tertiary and Mesozoic rocks. The well was abandoned as a dry hole on May 5, 1961, after encountering only minor, non-commercial gas showings.