Geology of Oscar Range (Devonian) Reef Complex, Canning Basin, Western Australia: ABSTRACT

AAPG Bulletin ◽  
1984 ◽  
Vol 68 ◽  
Author(s):  
Neil F. Hurley
Keyword(s):  
Western Australia ◽  
Reef Complex ◽  
Canning Basin ◽  
Oscar Range

THE GEOLOGY AND HYDROCARBON POTENTIAL OF THE EP 104 PERMIT, NORTHWEST CANNING BASIN, WESTERN AUSTRALIA

1986 ◽  
Vol 26 (1) ◽  
pp. 261
Author(s):  
P.R. Lehmann
Keyword(s):  
Western Australia ◽  
Early Carboniferous ◽  
Hydrocarbon Reservoirs ◽  
Hydrocarbon Potential ◽  
Considerable Potential ◽  
Reef Complex ◽  
Canning Basin ◽  
Large Potential ◽  
Exploration Well

Current interpretations suggest the presence of five Devonian reef building cycles in EP 104 with a further two in the Ordovician, Nita, and Willara formations. The possible Devonian reefs occur in the NVorral, Lower and Upper Pillara, Virgin Hills, and Nullara carbonate cycles. Minor buildups may be present in the Fairfield and Laurel formations.The Upper Pillara reef complex was subaerially exposed and partly eroded for a period of 10 to 50 million years, following the Early Frasnian 'Tappers Inlet orogeny'. Large potential hydrocarbon reservoirs were created by the secondary mega-porosity formed during this period, and these were sealed by the regional Laurel transgression in the Early Carboniferous. This mode of porosity enhancement is applicable to all the potential reef cycles, as varying degrees of unconformity mark their upper boundaries, generally followed by onlap of sealing lithologies. The Upper Pillara cycle is considered the most prospective of the Devonian carbonate cycles which were the main targets in the first five wells.In response to the success of Home Energy Co. Ltd at Sundown, the last four wells in EP 104 have had Permo-Carboniferous objectives. This drilling resulted in the discovery in 1982 of the small Kora oilfield, believed to have been sourced from the Laurel Formation.The Black Rocks Prospect, in King Sound, is being considered for the first 1986 exploration well. This represents a return to Devonian Pillara reefs, the traditional primary targets in EP 104. As a bonus, drape, accentuated by late collapse of the reefal core, has localized multiple Permo-Carboniferous structural closures, coincident with reefal closure.By comparison with the highly productive Swan Hills and Rainbow-Keg River reefs in Canada the Pillara and Worral carbonate cycles in EP 104 must have considerable potential.

scholarly journals Upper Devonian microvertebrates from the Canning Basin, Western Australia

2015 ◽  
Vol 65 (1) ◽  
pp. 69-101 ◽  
Author(s):  
Brett Roelofs ◽  
Ted Playton ◽  
Milo Barham ◽  
Kate Trinajstic
Keyword(s):  
New Species ◽  
Western Australia ◽  
South China ◽  
First Record ◽  
Late Devonian ◽  
Canning Basin ◽  
Eastern Australia ◽  
Conodont Zone ◽  
Oscar Range ◽  
A New Species

Abstract A diverse microvertebrate fauna is described from the Virgin Hills and Napier formations, Bugle Gap Limestone Canning Basin, Western Australia. Measured sections at Horse Spring and Casey Falls (Virgin Hills Formation) and South Oscar Range (Napier Formation) comprise proximal to distal slope carbonates ranging in age from the Late Devonian Frasnian to middle Famennian. A total of 18 chondrichthyan taxa are identified based on teeth, including the first record of Thrinacodus tranquillus, Cladoides wildungensis, Protacrodus serra and Lissodus lusavorichi from the Canning Basin. A new species, Diademodus dominicus sp. nov. is also described and provides the first record of this genus outside of Laurussia. In addition, the upper range of Australolepis seddoni has been extended to Late Devonian conodont Zone 11, making it the youngest known occurrence for this species. The Virgin Hills and Napier formations microvertebrate faunas show close affinities to faunas recovered from other areas of Gondwana, including eastern Australia, Iran, Morocco and South China, which is consistent with known conodont and trilobite faunas of the same age.

scholarly journals Outer Rocky Shores of the Mowanbini Archipelago, Devonian Reef Complex, Canning Basin, Western Australia

2007 ◽  
Vol 115 (5) ◽  
pp. 583-600 ◽  
Author(s):  
Markes E. Johnson ◽  
Gregory E. Webb
Keyword(s):  
Western Australia ◽  
Rocky Shores ◽  
Reef Complex ◽  
Canning Basin
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