Legacy product - no abstract available

Legacy product - no abstract available

Legacy product - no abstract available

Woomera Bore 1 was drilled to a depth of 2,005 feet. Four formations were penetrated believed to be of Cambrian and/or Proterozoic age. The nature of these beds suggests that the area has no petroleum prospects. The age of the strata penetrated is uncertain, as no fossils have been observed. No results were obtained from a formation test carried out with the packer set at 1,445 feet.

The completion report of A.A.O. No. 8, (Karumba) has been wrttten by A.C.M. Laing* and contributions on Petrology by N.C. Stevens,*** Micropalaeontology by I. Crespin,** and Electrical Logging by D.F. Dyson** are appended. The report is one of a series of reports published on bores subsidized under the Petroleum Search Subsidy Act, 1957-58. The hole was put down to determine the stratigraphical sequence of the south-eastern part of the Carpentaria Basin, an extension of the Great Artesian Basin, and to evaluate the significance of a gravity high. The significance of the bore is that the stratigraphical sequence of the area and the depth of hasement are now actually known from drilling evidence. It is the third test bore recently drilled in the Gulf of Carpentaria, on geophysical indications. The other two are Wyaaba No. 1 (Frome-Broken Hill Co. pty Ltd), and Weipa No. 1 (Zinc Corporation Ltd). The stratigraphy encountered in these bores is shown on the correlation chart, Plate 2. A composite well log of A.A.O. No. 8 is attached (Plate I). It is surprising to note from the log that no separate tests were made of the intervals 760-900 feet and 1540-1630 feet. The electrical log for both intervals suggests possibilities of oil, gas, or salt water; a small gas show was actually observed at 1595 feet. * Mines Administration Pty Ltd, Brisbane. ** Bureau of Mineral Resources, Canberra. *** University of Queensland.

The rig and ancillary gear were shipped by the 300-ton landing barge "Wewak" from Kaufana, Papua, to Wilson Island, a distance of approximately 1,000 miles. They were thence transferred to Wreck Island by the drilling company's landing barge "Tamona" of 47.38 registered tonnage. All stores, supplies, and fresh water were transported 58 miles from Gladstone by the "Tamona". Communications were maintained by an A.W.A. 5A Transceiver with OTC Station VIR Rockhampton. The bore was spudded in at 1400 hours, 7th May, 1959. 12-1/4 inch hole was drilled to 493 feet. Owing to lost circulation, no cuttings could be recovered from the hole, and a laborious system of bailing was resorted to. The 12-1/4 inch pilot hole was opened to 17-1/2 inches, and 13-3/8 inch J55x54.5 lb. STC casing was run to 480 feet. 12-1/4 inch hole was drilled to 1,170 feet, but owing to porous unconsolidated sediments and lost circulation in higher zones it was decided to run and cement 9-5/8 inch J55x40 lb. STC casing at 1,110 feet. 8-1/2 inch hole was then drilled to total depth, 1,898 feet. Recent, Pleistocene, Pliocene, and Miocene sediments were penetrated; basement was encountered at 1,795 feet. Fourteen cores were cut during the drilling of the bore, using a 20-foot Reed K500 "Kor-King" barrel. Both hard and soft formation 5-5/8 inch core heads were used. The hole was logged to total depth with a Failing Logmaster, giving the self-potential, 16 and 63 inch normal and single point resistivity, and gamma ray curves. No shows of oil or gas were noted, and in consequence no drill stem tests were carried out. Three deviation surveys were made; the maximum deviation was 1/2 degree at 1,580 feet. The bore was abandoned as a dry hole by placing cement plugs from 1,160 to 1,060 feet and from 50 feet to surface; a metal name plate affixed to a projecting pipe was welded on to the cap sealing the bore.

Legacy product - no abstract available

The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.

The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.

The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.