Long Offset Seismic Data Processing for Deep Water Hydrocarbon Survey of Ulleung Basin, East Sea, Korea

doi:10.12972/ksmer.2013.50.1.001

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2013 Vol.50, Issue 1 Preview Page Next Page

Research Paper

Long Offset Seismic Data Processing for Deep Water Hydrocarbon Survey of Ulleung Basin, East Sea, Korea 심해 유가스전 탐사를 위한 동해 울릉분지 원거리벌림 탄성파탐사 자료처리: 정순홍·김영준·김원식·구남형·김진호·이호영
Snons Cheong, Young-jun Kim, Wonsik Kim, Nam-Hyung Koo, Jin-Ho Kim and Ho-Young Lee

28 February 2013. pp. 1-10

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Abstract

Deep water multichannel seismic data requires optimal acquisition and processing parameter analysis for high-resolution imaging at the target depth. In this paper, we introduce deep water seismic acquisition and processing parameters for the long offset seismic survey conducted in 2010 on Ulleung basin, East Sea of which the water depth is over 1,400 m. 5,000 m streamer for the deep water seismic imaging is the longest one ever used by domestic survey team in Korea. Also we produced seismic stack section by adaptive processing including demultiple using Radon filter and velocity analysis module. Stack section revealed deep sediment layers which were not easily recognized on the conventional seismic section. Our result showed that multiple rejections and velocity analysis might be crucial to deep water seismic data processing for East Sea, Korea. To secure deep water seismic techniques in offshore Korea, various seismic data processing techniques need to be studied and this deep water seismic data can be used in the subsequent related researches.

Keywords

Deep Water Seismic

Long Offset

Radon Filter

Demultiple

Velocity Analysis

심해 유가스전 탄성파 탐사는 영상화 목표심도가 깊기 때문에 자료 취득 및 처리변수가 천해 탐사와 상이하다. 본 연구에서는 수심 1,400 m 이상인 동해 울릉분지에서 2010년 취득한 다중채널 탄성파 탐사자료의 취득 및 전산처리 변수를 소개하고 자료처리 결과물인 겹쌓기단면을 제시하였다. 탄성파 탐사자료는 5,000 m 길이의 스트리머를 전개한 국내 최대 원거리벌림 설정과 대용량 음원 발파로 취득되어 심부 지층 영상화에 적합하다. 전산처리를 수행하여 작성된 겹쌓기단면을 관찰한 결과 기존 탄성파 탐사자료에서 확인되지 않은 심부 퇴적층서 구분이 가능하였다. 울릉분지 심해 탄성파자료의 적절한 영상화를 위하여 라돈 필터를 이용한 해저면 겹반사파 제거가 필요하였고 심부지층의 연속성을 높이는 속도분석이 요구되었다. 향후 국내 심해 유가스전 탄성파 탐사기술 정립을 위하여 다양한 자료처리 기법이 개발되어야 하며 이를 위해 이 연구에서 소개된 탄성파자료가 기초자료로 활용될 것으로 기대된다.

키워드

심해 탄성파탐사

원거리벌림

라돈 필터

겹반사파 제거

속도분석

References

Assad, J.M., Buchheitt, T.J., Mohn, K.W. and Masters, R., 2008, “Deep water seismic data enhancement and improved resolution: Implications for oil and gas exploration and exploitation, Gulf of Mexico,” The Leading Edge, Vol. 27, pp. 980-981.
Barley, B. and Summers, T., 2007, “Multi-azimuth and wide-azimuth seismic: Shallow to deep water, exploration to production,” The Leading Edge, Vol. 26, pp. 450-458.
Carrion, P.M., 1988, “Velocity analysis from large offset seismic records,” Pure and Applied Geophysics, Vol. 126, No. 1, pp. 1-26.
Filpo, E. and Tygel, M., 1999, “Deep-water multiple suppression in the near-offset range,” The Leading Edge, Vol. 18, pp. 81-84.
Fruehn, J., Jones, I. F., Valler, V., Sangvai, P., Biswal, A. and Mathur, M., 2008, “Resolving near-seabed velocity anomalies: Deep water offshore eastern India,” Geophysics, Vol. 73, No. 5, pp. VE235-VE241.
Hansen, J., Tjostheim, B., Sonneland, L., Jasund, S. and Larssen, B., 2001, “Analysis of long offset sub-basalt data using model-based processing,” Norwegian Petroleum Directorate, Stavanger, Norway 28th Feb.
Hardy, R. and Hobbs, R., 1991, “Multiple suppression in deep water,” AGU Geodynamics Series, Vol. 22, pp. 383-390.
Kim, T.Y. and Jang, S.H., 2012, “Optimization for multiple attenuation of marine seismic reflection data,” Journal of The Korean Society for Geosystem Engineering, Vol. 49, No. 3, pp. 281-291.
Kim, Y.J., Cheong, S., Koo, N.H., Kim, W.S., Kim, J.H. and Lee, H.Y., 2012, “2-D Seismic navigation data acquisition and quality control for deepwater hydrocarbon exploration in the Ulleung Basin, East Sea,” Journal of The Korean Society for Geosystem Engineering, Vol. 49, No. 2, pp. 210-225.
Koo, N.H., Kim, W.S., Kim, B.Y., Cheong, S., Kim, Y.J., Yoo, D.G., Lee, H.Y. and Park, K.P., 2008, “2-D/3-D Seismic data acquisition and quality control for gas hydrate exploration in the Ulleung Basin,” Geophysics and Geophysical Exploration, Vol. 11, No. 2, pp. 127-136.
Mallick, S., Huang, X., Lauve, J. and Ahmad, R., 2000, “Hybrid seismic inversion: A reconnaissance tool for deepwater exploration,” The Leading Edge, Vol. 19, pp. 1230-1237.
OGP, 2011, “An overview of marine seismic operations,” International Association of Oil & Gas Producers, report No. 448.
Park, K.P., Lee, H.Y., Koo, N.H., Kim, K.O., Kang, M.H., Jang, S.H. and Kim, Y. G., 1999, “240 channel marine seismic data acquisition by Tamhae Ⅱ,” Geophysics and Geophysical Exploration, Vol. 2, No. 2, pp 77-85.
Pettingill, H. S. and Weimer, P., 2002, “Worldwide deepwater exploration and production: Past, present, and future”, The Leading Edge, Vol. 21, pp. 371-376.
Shin, S.R. and Lee, J.H., 2004, “Reverberation removal of marine single channel seismic data using adaptive subtraction,” Journal of The Korean Society for Geosystem Engineering, Vol. 41, No. 5, pp. 381-388.
Wombell, R., Jones, E., Priestly, D. and Williams, G., 1999, “Long offset acquisition and processing for sub-basalt imaging” Expanded Abstract of SEG 69th Annual Meeting, Houston. 31st Oct- 5th Nov.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 50
No :1
Pages :1-10
DOI :https://doi.org/10.12972/ksmer.2013.50.1.001

[1] Assad, J.M., Buchheitt, T.J., Mohn, K.W. and Masters, R., 2008, “Deep water seismic data enhancement and improved resolution: Implications for oil and gas exploration and exploitation, Gulf of Mexico,” The Leading Edge, Vol. 27, pp. 980-981.

[2] Barley, B. and Summers, T., 2007, “Multi-azimuth and wide-azimuth seismic: Shallow to deep water, exploration to production,” The Leading Edge, Vol. 26, pp. 450-458.

[3] Carrion, P.M., 1988, “Velocity analysis from large offset seismic records,” Pure and Applied Geophysics, Vol. 126, No. 1, pp. 1-26.

[4] Filpo, E. and Tygel, M., 1999, “Deep-water multiple suppression in the near-offset range,” The Leading Edge, Vol. 18, pp. 81-84.

[5] Fruehn, J., Jones, I. F., Valler, V., Sangvai, P., Biswal, A. and Mathur, M., 2008, “Resolving near-seabed velocity anomalies: Deep water offshore eastern India,” Geophysics, Vol. 73, No. 5, pp. VE235-VE241.

[6] Hansen, J., Tjostheim, B., Sonneland, L., Jasund, S. and Larssen, B., 2001, “Analysis of long offset sub-basalt data using model-based processing,” Norwegian Petroleum Directorate, Stavanger, Norway 28th Feb.

[7] Hardy, R. and Hobbs, R., 1991, “Multiple suppression in deep water,” AGU Geodynamics Series, Vol. 22, pp. 383-390.

[8] Kim, T.Y. and Jang, S.H., 2012, “Optimization for multiple attenuation of marine seismic reflection data,” Journal of The Korean Society for Geosystem Engineering, Vol. 49, No. 3, pp. 281-291.

[9] Kim, Y.J., Cheong, S., Koo, N.H., Kim, W.S., Kim, J.H. and Lee, H.Y., 2012, “2-D Seismic navigation data acquisition and quality control for deepwater hydrocarbon exploration in the Ulleung Basin, East Sea,” Journal of The Korean Society for Geosystem Engineering, Vol. 49, No. 2, pp. 210-225.

[10] Koo, N.H., Kim, W.S., Kim, B.Y., Cheong, S., Kim, Y.J., Yoo, D.G., Lee, H.Y. and Park, K.P., 2008, “2-D/3-D Seismic data acquisition and quality control for gas hydrate exploration in the Ulleung Basin,” Geophysics and Geophysical Exploration, Vol. 11, No. 2, pp. 127-136.

[11] Mallick, S., Huang, X., Lauve, J. and Ahmad, R., 2000, “Hybrid seismic inversion: A reconnaissance tool for deepwater exploration,” The Leading Edge, Vol. 19, pp. 1230-1237.

[12] OGP, 2011, “An overview of marine seismic operations,” International Association of Oil & Gas Producers, report No. 448.

[13] Park, K.P., Lee, H.Y., Koo, N.H., Kim, K.O., Kang, M.H., Jang, S.H. and Kim, Y. G., 1999, “240 channel marine seismic data acquisition by Tamhae Ⅱ,” Geophysics and Geophysical Exploration, Vol. 2, No. 2, pp 77-85.

[14] Pettingill, H. S. and Weimer, P., 2002, “Worldwide deepwater exploration and production: Past, present, and future”, The Leading Edge, Vol. 21, pp. 371-376.

[15] Shin, S.R. and Lee, J.H., 2004, “Reverberation removal of marine single channel seismic data using adaptive subtraction,” Journal of The Korean Society for Geosystem Engineering, Vol. 41, No. 5, pp. 381-388.

[16] Wombell, R., Jones, E., Priestly, D. and Williams, G., 1999, “Long offset acquisition and processing for sub-basalt imaging” Expanded Abstract of SEG 69th Annual Meeting, Houston. 31st Oct- 5th Nov.

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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