ODNL Penola No 1 Well: Geological Log of a 1961 South Australian Exploration Bore

Oil Development N.L. drilled the O.D.N.L. Penola No. 1 Well in South Australia from February 7 to May 5, 1961, reaching a total depth of 4985 feet. The operation provided electric and mud logging, testing, and coring to test the petroleum potential of the Coonawarra subsurface structure. The dataset, sourced from the Australian Ocean Data Network, details the geological sequence penetrated, ranging from Oligocene to probable Upper Jurassic rocks.

Use Cases

• Stratigraphic modeling based on the detailed geological sequence and formation thicknesses described.
• Historical analysis of exploration techniques based on the described logging and coring program.
• Assessing regional petroleum potential based on the documented gas showings and structural interpretation.

Strengths

• Provides a precise drilling timeline from February 7 to May 5, 1961.
• Includes detailed geological formation depths and thicknesses, such as 215 feet of Gambier Limestone.
• Documents specific technical details, including the rig used (Failing 2500 - Holemaster) and contractor.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is presented in PDF/HTML formats, which may require extraction for computational analysis.

Provenance

Source

Australian Ocean Data Network

Collection Method

Drilling and logging operation conducted by Oil Development N.L. under a farm-out agreement.

Time Range

Drilling operations occurred from February 7, 1961, to May 5, 1961.

Freshness

Last updated 2026-04-10 17:19:00.716818; freshness should be verified.

Geography

North-east corner of Section 500, Hundred of Penola, South Australia.