Acquisition and processing of the Youanmi and Southern Carnarvon ...

[Pages:36]Acquisition and processing of the Youanmi and Southern Carnarvon seismic surveys

Ross Costelloe & Leonie Jones (presented by Russell Korsch)

Project Partners

Contributors

Australian National University University of New South Wales Geological Survey of South Australia

CICESE, Mexico

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

11GA-SC1 259 km

10GA-CP3

10GA-YU1 302 km

10GA-YU3 110 km

10GA-YU2 283 km

Total = 954 line km

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

Seismic Reflection Acquisition

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

CMP (Common Mid Point) Method

R6 R5 R4 R3 R2 R1 S2 R6 R5 R4 R3 R2 R1 S1

Reflector D1/M1

? Depth point D1/M1 is sampled by R1 for Shot 1, R3 for Shot 2 and R5 for Shot 3 (not shown). ? All paths with common midpoint are brought into a gather ? 75 fold sampling for most of Youanmi & Southern Carnarvon surveys (150 fold across the greenstone belts)

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

Seismic Acquisition

Symmetrical split spread with maximum 6 km offset 300 channels, receiver groups at 40 m intervals

Vibe points every 80 m (= 75 fold), but every 40 m (= 150 fold) over the greenstone belts

(not to scale!)

Youanmi & Southern Carnarvon Seismic & MT Workshop, Perth, 27 February 2013

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