Andrew Samuel Long

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Andrew Samuel Long
Andrew Samuel Long headshot.png
PhD Geophysics
PhD university University of Western Australia

Andrew S. Long (born 1965) is an Australian geophysicist. He has a PhD in geophysics (1996) from the University of Western Australia, and a post-doctoral term at Stanford University. He is a leader in the application of geophysical technologies to exploration for oil and gas in marine areas,[1] and has written and presented several papers at the Society of Exploration Geophysicists (SEG), the Australian Society of Exploration Geophysicists (ASEG), and many other international conventions and journals.

Early awards include the 1992 Alumni Medal award for outstanding post-graduate from Curtin University of Technology, ASEG Best Presentation (1994), ASEG Best Paper (2004), and Indonesian Petroleum Association (IPA) Best Paper Professional for Geophysics and Formation Evaluation (2009). Leading figure in the application of satellite altimetry technology to the mapping of the marine gravitational field in the early 1990s,[2] the application of modelling methods to 3D seismic survey planning,[3][4] the development of High-Density 3D (HD3D)[5][6][7] technology for seismic exploration, the introduction of multi-azimuth and wide-azimuth 3D technology into the Asia-Pacific region,[8] and in the introduction of dual-sensor streamer seismic technology to the oil and gas industry.[9] The HD3D and dual-sensor streamer technologies were pioneered during his employment with Petroleum Geo-Services. It is estimated that more than half of all 3D towed streamer surveys acquired worldwide by all seismic service companies can now be categorised as HD3D surveys. Dual-sensor streamers (commercial name is GeoStreamer) are a next generation technology introduced at the annual convention of the European Association of Geoscientists and Engineers in 2007, and represent a new tool for identifying oil and gas accumulations in marine sediments. The first-ever dual-sensor streamer survey was acquired in 2008 on the North West Shelf of Australia.[10][11] A modification of the GeoStreamer technology presented by Andrew Long won an IPA award in 2009.

Following several years of publications and presentations at international oil and gas conventions, in 2009 he was honoured as the inaugural Honorary Lecturer for Pacific South for the Society of Exploration Geophysicists, the largest internal professional society for the geophysical community.

Honors and Awards

  • 2009 SEG Honorary Lecturer, Pacific South
  • 2009 Best Paper Presented at the Annual Meeting Society of Exploration Geophysicists
  • 2009 Indonesian Petroleum Association (IPA) Best Paper Professional for Geophysics and Formation Evaluation,
  • 2004 ASEG Best Paper
  • 1994 ASEG Best Presentation
  • 1992 Alumni Medal award for outstanding post-graduate from Curtin University of Technology

Career and Accomplishments

Dr. Long was a leader in many areas of geophysical technology:

  • application of satellite altimetry technology to the mapping of the marine gravitational field in the early 1990s.
  • application of modelling methods to 3D seismic survey planning
  • development of High-Density 3D (HD3D) technology for seismic exploration
  • introduced multi-azimuth and wide-azimuth 3D technology into the Asia-Pacific region.
  • introduced dual-sensor streamer seismic technology to the oil and gas industry.

The HD3D and dual-sensor streamer technologies were pioneered during his employment with Petroleum Geo-Services. It is estimated that more than half of all 3D towed streamer surveys acquired worldwide by all seismic service companies can now be categorised as HD3D surveys. Dual-sensor streamers (commercial name is GeoStreamer) are a next generation technology introduced at the annual convention of the European Association of Geoscientists and Engineers in 2007, and represent a new tool for identifying oil and gas accumulations in marine sediments. The first-ever dual-sensor streamer survey was acquired in 2008 on the North West Shelf of Australia. A modification of the GeoStreamer technology presented by Andrew Long won an IPA award in 2009.

Following several years of publications and presentations at international oil and gas conventions, in 2009 Long was honoured as the inaugural Honorary Lecturer for Pacific South for the Society of Exploration Geophysicists, the largest internal professional society for the geophysical community.

2009 SEG Honorary Lecturer, Pacific South

Multi-azimuth and wide-azimuth seismic: Foundations, challenges, and opportunities

Summaryː As our industry enters the era of declining reserves replacement and increased exploration in areas affected by challenges to seismic imaging, interest is rapidly turning to the acquisition and processing of complementary source-receiver azimuths. Some proponents now equate the progression from "standard" 3D to multi-azimuth (MAZ) and wide-azimuth (WAZ) 3D seismic as being equivalent to the progression of the industry from 2D to 3D seismic! While survey cost has historically been a high-profile issue, the pursuit of efficiency gains has stimulated innovations in the execution of MAZ and WAZ seismic.

What really matters is that both MAZ and WAZ applications to towed streamer seismic deliver a remarkably robust attenuation of complex noise and multiple events, and the return on investment can be demonstrably justified. Now that a strong catalog of case studies exists, backed by advances in 3D modeling confidence, it is possible to evaluate all geophysical issues relevant to MAZ and WAZ seismic with an objective eye. Case examples from several major operators and service companies are presented from the perspective of presurvey objectives versus postsurvey learnings.

Consideration is given to the many challenges throughout the southern Asia-Pacific region, including exploration and production targets affected by carbonates, basalts, and complex overburden structures. Particular attention is given to the issue of seismic wavefield scattering and how MAZ and WAZ geometries can address complex seismic multiple and noise problems.

References

  1. "Seismic Technology A Boon for Inquisitive Minds". PESA News (Petroleum Exploration Society of Australia). December 2005—January 2006. ISSN 1039-4419. Archived from the original on 25 Aug 2006. http://www.pesa.com.au/publications/pesa_news/dec_05/pesanews_7914.html. Retrieved 12 January 2012.
  2. Long, A.S.; Spurling, T.A. (1993). "Increased resolution of processed satellite altimeter data: The development of a quality global gravity database". Exploration Geophysics (CSIRO Publishing) 24 (4): 663–670. ISSN 1834-7533. http://www.publish.csiro.au/paper/EG993663. Retrieved 12 January 2012.
  3. Long, Andrew S.; Hoffmann, Hans-Jurgen; Du, Bingwen (2001). "Understanding elastic wavefield recording by detailed 3D survey planning and simulation". ASEG Extended Abstracts (CSIRO Publishing) (1): 1–4. http://www.publish.csiro.au/?paper=ASEG2001ab076. Retrieved 12 January 2012.
  4. Long, Andrew S. (1 October 2004). "Postsurvey calibration of 3D seismic results to presurvey modeling predictions". The Leading Edge (Society of Exploration Geophysicists) 23 (10): 1033–1036. doi:10.1190/1.1813364. http://tle.geoscienceworld.org/cgi/content/extract/23/10/1033. Retrieved 12 January 2012.
  5. Long, Andrew S.; Ramsden, Charles R.T; Hoffmann, Jurgen (2003). "In pursuit of the ideal 3D streamer symmetric sampling criteria". ASEG Extended Abstracts (CSIRO Publishing) (2): 1–4. http://www.publish.csiro.au/?paper=ASEG2003ab100. Retrieved 12 January 2012.
  6. ""Improving 3D images": GEO ExPro, 06-2004". Geoexpro.com. http://www.geoexpro.com/sfiles/4/31/6/file/improving_3d_images.pdf. Retrieved 12 January 2012.
  7. ""The revolution in seismic resolution: High density 3D spatial sampling developments and results": ASEG Meeting, 2004" (PDF). http://www.pgs.com/upload/31219/data.pdf. Retrieved 12 January 2012.
  8. ""Multi-Azimuth Seismic": PESA News, 04-2005". Pesa.com.au. http://www.pesa.com.au/Publications/pesa_news/april_05/pesanews_7513.html. Retrieved 12 January 2012.
  9. "GeoStreamer Video Interview: Energy Spotlight, 03-2008". Youtube. http://www.youtube.com/watch?v=dskaO5vppN8. Retrieved 12 January 2012.
  10. "A calibrated dual-sensor streamer investigation of deep target signal resolution and penetration on the NW Shelf of Australia": SEG Annual Meeting, 2008
  11. ""Signal resolution and penetration from dual-sensor streamer data on the NW shelf of Australia": ASEG Annual Meeting, 2009". Publish.csiro.au. http://www.publish.csiro.au/?paper=ASEG2009ab017. Retrieved 12 January 2012.

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