seismic balancing to improve interpretation results – a case study from the joseph bonaparte gulf...
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Seismic Balancing to Improve Interpretation Results – A Case Study from the Joseph Bonaparte Gulf
Keith Woollard - GeoCom Services Australia Pty Ltd
Audrey Leonard - Woodside Energy Limited
Amanda Panting - Woodside Energy Limited
In Alliance with
What Are We Going To See?
Nothing new Nothing high tech Nothing expensive Not even any 3d
Cost effective methodology to improve interpretability of multi-vintage 2d
Introduction
The Woodside Energy Limited and Shell Alliance was awarded 3 blocks Offshore Southern Bonaparte Basin
6500km 2d seismic recorded and processed Existing 8 bit loaded seismic grid
20000km44 “vintages” ranging from 1967 to 1997670 seismic linesGood data qualitySome loading problems
Location
Seismic CoverageWA279P&WA280P STUDY AREA
127°30'00"E 128°00'00"E 128°30'00"E 129°00'00"E 129°30'00"E
15°30'00"S
15°00'00"S
14°30'00"S
14°00'00"S
13°30'00"S
300 000M E 400 000M E 500 000M E 600 000M E
8 300 000M N
8 400 000M N
8 500 000M N
127°00'00"E 130°00'00"E16°00'00"S
13°00'00"S
Woodside Offshore Petroleum
Author :
Date : 18-AUG-1999 08:32:03
Drafted By : wopt5h
Mapsheet : TSH_WA279P&WA280P
Zone : 52Scale : 1:500000
Enc losure :
0 10 20 30 40 501:500000
KILOMETRES
0 4 8 12 16 20
MILES
UNI VERSAL TRANSVERSE MERCATOR PROJECTI ON
AUSTRALI AN NATI ONAL SPHEROI D
CENTRAL MERI DI AN 129°00'00"E
EP 66
EP(A) 74
EP(A) 75
NT/P 46
NT/P 57
RL 1
EP 386
WA-128-P
WA-18-P
WA-279-P
WA-280-P
Barnett-1Barnett-2Barnett-3
Berkley-1
Billawock-1
Bonaparte-1
Bonaparte-2
Bougainville-1
Bullo River-1
Cambridge-1
Cape Ford-1
Frigate-1
Garimala-1Keep River-1
Kingfisher-1
Kinmore-1
Kulshill-1Kulshill-2
Lacrosse-1
Legune Water Bore-1
Legune Water Bore-4Legune Water Bore-6
Lesueur-1
Matilda-1
Moyle-1
Ningbing-1Ningbing-2
Pelican Island-1
Penguin-1
Pincombe-1
Sandpiper-1
Skull-1
Spirit Hill-1
Sunbird-1
Tern-1
Tern-2
Tern-3
Tern-4Tern-5
Turtle-1Turtle-2
Vienta-1
Waggon Creek-1Waggon Creek-1aWeaber-1Weaber-2Weaber-2aWeaber-3Weaber-4Weaber-5
Example Traverse
89BO CB94 89RX 99W CB80
Computing the Misties
Why use Statistics?
Balanced Traverse
Comparison Traverse
FastTrack Setup
FastTrack OutputRaw Balanced
FastTrack OutputRaw Balanced
Non-normalised AmplitudeRaw Balanced
Normalised Amplitude
ms
ms
amplitudes
mplitudeFastTrackANormalised
150
150
)(751
Raw Balanced
Effect of Phase on AmplitudeRaw Balanced
FastTrack Setup
FastTrack RunRaw Balanced
Normalised FastTrack AmplitudeRaw Balanced
Mispicked SeismicRaw Balanced
Mispicked SeismicRaw Balanced
Summary
Used only standard tools, SeismicBalance and UNIX
Significantly increased the quality of regional 2d dataset
Allowed better use of Autotrackers Mapping is faster and more reliable
Acknowledgments
Woodside Energy Limited Shell Development Australia