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Basin development with implications for petroleum trap styles of the Neoprotorezoic Officer Basin, Western Australia

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Basin development with implications for petroleum trap styles of the Neoprotorezoic Officer Basin, Western Australia

 

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Publication Name: The Sedimentary Basins of WA

Authors: S.N. Apak, K.A.R. Ghori, G.M. Carlsen & M.K. Stevens

Publication Volume: 3

Date Published: December 2002

Number of Pages: 32

Reference Type: Book Section

Abstract:

Three unconformity-bounded sedimentary successions exist in most parts of the Officer Basin in Western Australia: Supersequences 1, 3, and 4. The bounding unconformities correlate with tectonic episodes, and in
particular the Areyonga Movement (750 Ma) appears to be responsible for the larger structures in the Officer Basin, and separates Supersequence 1 from Supersequence 3. Structural and stratigraphic variations within the overlying Supersequences 3 and 4 are attributed to later deformation. Three main phases of hydrocarbon generation in the latest Neoproterowic, Cambrian and Late Palaeowic correlate well with initial migration and
trap formation during the Areyonga Movement and late migration and trap formation during the later
deformations.
Faults, unconformities, facies changes, and saltassociated traps occur throughout the basin but remain untested. In particular, episodic salt movement may have resulted in the formation of halokinetic traps within the younger successions. The ultimate petroleum potential of the western Officer Basin still remains to be proven but may be significant.

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