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U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY


TOTAL PETROLEUM SYSTEMS OF THE NORTHWEST SHELF, AUSTRALIA:

THE DINGO-MUNGAROO/BARROW AND
THE LOCKER-MUNGAROO/BARROW

by

Michele G. Bishop1

Open-File Report 99-50-E



 
 
 
 
 
 

This report is preliminary and has not been reviewed for conformity with the U. S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade names is for descriptive purposes only and does not imply endorsements by the U. S. government.

 
 
 

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FOREWORD
ABSTRACT
INTRODUCTION
PROVINCE GEOLOGY
      Exploration History
PETROLEUM OCCURRENCE
SOURCE ROCK
OVERBURDEN ROCK
TRAP STYLE
RESERVOIR ROCK
SEAL ROCK
UNDISCOVERED PETROLEUM BY ASSESSMENT UNIT
REFERENCES

TABLES
Table 1.   Significant discoveries, NW Shelf, Australia.   Sources include AGSO, World Oil, PESA, DPIE, Petroconsultants


FIGURES
Figure 1.   Index map of USGS Province 3948 Northwest Shelf,Australia. Shown are two petroleum systems (394801, the Dingo-Mungaroo, Barrow; 394802, the Locker-Mungaroo, Barrow) each with one assessment unit (39480101, 39480201).

Figure 2.   Index map of USGS Province 3948 Northwest Shelf, Australia. Major structural elements, basins, plateaus, bathymetric contours in meters, and geographical features are shown.

Figure 3.   Stratigraphy of the Barrow-Dampier and Rankin Trend with discoveries and shows. After Butcher, 1989

Figure 4.  Detail of index map of USGS Province 3948 Northwest Shelf, Australia. Fields are shown and wells and fields mentioned in the text are labeled.

Figure 5.  West-East cross section showing sub-basins developed between the Pilbara Block and the Exmouth Plateau. Triassic rocks have been cut off by the formation of the Gascoyne Abyssal Plain. The oil window is shown at 3-4 km depth on the East. Well total depths are in meters. The location of this cross section is marked on Figure 2. Modified from Barber, 1988.

Figure 6.  Burial history plots for the Barrow sub-basin(a) and the Exmouth Plateau(b). The zone of maximum hydrocarbon generation is between vitrinite reflectance values of 0.60 Ro% and 1.00 Ro%. Modified from Barber, 1988.

Figure 7.   Events Charts for the two primary petroleum systems of the Australian Northwest Shelf, A) Dingo source rocks with reservoirs in the Mungaroo and Barrow: B) Locker shale source rocks with reservoirs in the Mungaroo and Barrow.

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¹ Consultant, Wyoming PG-783, contracted to U. S. Geological Survey, Denver, Colorado


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