최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기지구물리와 물리탐사 = Geophysics and geophysical exploration, v.21 no.3, 2018년, pp.183 - 197
최우창 (인하대학교 에너지자원공학과) , 편석준 (인하대학교 에너지자원공학과)
In the delineation of geological structures using seismic exploration, it is very important to improve resolution of seismic data as well as accurate velocity model building and subsurface imaging. The resolution of seismic data can be enhanced by employing high-frequency energy sources or by applyi...
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
도깨비파란 무엇인가? | 탄성파 탐사에서 분해능을 저해하는 가장 큰 원인은 도깨비(ghost)파이다. 도깨비파는 해수면이나 지표면 등 자유면(free surface) 아래에 송신원과 수신기가 위치할 때 자유면으로부터 반사되어 기록된 신호를 의미한다(Leet, 1937; Van Melle andWeatherburn, 1953). Fig. | |
탄성파 탐사에서 분해능이 낮으면 어떤 문제를 야기할 수 있나? | 탄성파 탐사에서 분해능은 취득한 자료를 통해 얼마나 얇은 두께를 갖는 층을 해석할 수 있는지를 의미한다(Widess, 1973). 분해능이 낮은 경우 사진이나 영상이 뭉개지는 것과 같이 탄성파 자료의 분해능이 낮을 경우 연속적으로 쌓여 있는 얇은 층 들이 마치 하나의 층처럼 보여 정확한 해석을 방해하게 된다. 또한 점들의 개수로 분해능을 구분하는 것과 같이 탄성파 탐사에서도 몇 가지 기준을 사용하여 분해능을 정의하게 된다. | |
송신원 도깨비파 제거에 초점을 맞춘 대표적인 기술에는 무엇이 있나? | 앞에서 설명한 기술들은 다양한 수신기 배열을 통해 수신기 도깨비파의 영향을 제거하는 기술이며, 이와 마찬가지로 송신원 도깨비파의 영향을 제거하기 위한 기술들 또한 연구되고 있다. 송신원 도깨비파 제거에 초점을 맞춘 대표적인 기술들로는 CGG사의 BroadSource(Siliqi et al., 2013)와 PGS사의 GeoSource (Parkes and Hegna, 2011) 등이 있다. 이러한 기술들은 서로 다른 깊이에 위치한 에어건(air-gun)들을 약간의 시간 지연을 갖고 발파하여 1차 반사파의 진폭은 증폭시키고 도깨비파는 상쇄시킴으로써 송신원 도깨비파의 영향을 제거해주게 된다. |
Amundsen, L., 1993, Wavenumber-based filtering of marine point-source data, Geophysics, 58(9), 1335-1348.
Amundsen, L., and Landro, M., 2013a, Broadband Seismic Technology and Beyond, GEO ExPro, 10(1).
Amundsen, L., and Landro, M., 2013b, Broadband Seismic Technology and Beyond, Part II: Exorcizing Seismic Ghosts, GEO ExPro, 10(2).
Amundsen, L., and Landro, M., 2014, Broadband Seismic Technology and Beyond, X: IsoMetrix-Isometric Sampling, GEO ExPro, 11(4).
Barr, F. J., and Sanders, J. I., 1989, Attenuation of water-column reverberations using pressure and velocity detectors in a water-bottom cable, 59th Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstract, 653-656.
Berni, A. J., 1982, Vertical component accelerometer, U.S. Patent No 4,345,473.
Berni, A. J., 1984, Marine seismic system, U. S. Patent 4,437,175.
Berni, A. J., 1985a, Low noise mounting for accelerometer used in marine cable, U. S. Patent 4,477,887.
Berni, A. J., 1985b, Marine seismic system, U. S. Patent 4,520,467.
Brink, M., and Svendsen, M., 1987, Marine seismic exploration using vertical receiver arrays: A means for reduction of weather downtime, 57th Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstract, 184-187.
Carlson, D. H., Long, A., Sollner, W., Tabti, H., Tenghamn, R., and Lunde, N., 2007, Increased resolution and penetration from a towed dual-sensor streamer, First Break, 25(12), 71-77.
Claerbout, J. F., 1976, Fundamentals of geophysical data processing, McGraw-Hill Book Co.
Denis, M., Brem, V., Pradalie, F., Moinet, F., Retailleau, M., Langlois, J., Bai, B., Taylor, R., Chamberlain, V., and Frith, I., 2013, Can land broadband seismic be as good as marine broadband?, Leading Edge, 32(11), 1382-1388.
Haggerty, P. E., 1956, Method and apparatus for canceling reverberations in water layers, U.S. Patent No 2,757,356.
Jenkins, F. A., and White, H. E., 1957, Fundamentals of optics, McGraw-Hill Book Co.
Kallweit, R. S., and Wood, L. C., 1982, The limits of resolution of zero-phase wavelets, Geophysics, 47(7), 1035-1046.
Knapp, R. W., 1991, Fresnel zones in the light of broadband data, Geophysics, 56(3), 354-359.
Kragh, E., Muyzert, E., Curtis, T., Svendsen, M., and Kapadia, D., 2010, Efficient broadband marine acquisition and processing for improved resolution and deep imaging, Leading Edge, 29(4), 464-469.
Krail, P. M., and Shin, Y., 1990, Deconvolution of a directional marine source, Geophysics, 55(12), 1542-1548.
Kustowski, B., Tegtmeier-Last, S., Cole, J., Clark, D., and Hennenfent, G., 2013, Curvelet noise attenuation guided by a signal or noise model: case studies, 83rd Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstract, 4267-4271.
Leet, L. D., 1937, A plutonic phase in seismic prospecting, Bull. Seismol. Soc. Amer., 27(2), 97-98.
Lindsey, J. P., 1989, The Fresnel zone and its interpretive significance, Leading Edge, 8(10), 33-39.
Moldoveanu, N., Seymour, N., Manen, D. V., and Caprioli, P., 2012, Broadband seismic methods for towed-streamer acquisition, 74th Ann. Internat. Mtg., EAGE, Expanded Abstracts.
O'Driscoll, R., King, D., Tatarata, A., and Montico, Y., 2013, Broad-bandwidth data processing of conventional marine streamer data: An offshore West Africa field case study, 83rd Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstracts, 4231-4235.
Parkes, G., and Hegna, S., 2011, An acquisition system that extracts the earth response from seismic data, First Break, 29(12), 81-87.
Parrack, Alvin L., 1976, Method of marine reflection-type seismic exploration, U.S. Patent No 3,979,713.
Paulson, H., Husom, V. A., and Goujon, N., 2015, A MEMS accelerometer for multicomponent streamers, 77th Ann. Internat. Mtg., EAGE, Expanded Abstracts.
Pavey, Jr George M., and Pearson, Raymond H., 1966, Method and underwater streamer apparatus for improving the fidelity of recorded seismic signals, U.S. Patent No 3,290,645.
Posthumus, B. J., 1993, Deghosting using a twin streamer configuration, Geophys. Prospect., 41(3), 267-286.
Ray, Clifford H., and Moore, Neil A., 1982, High resolution, marine seismic stratigraphic system, U.S. Patent No 4,353,121.
Ricker, N., 1953, Wavelet contraction, wavelet expansion, Geophysics, 18, 769-792.
Robertsson, J. O., Moore, I., Ozbek, A., Vassallo, M., Ozdemir, K., and Manen, D. J. V., 2008, Reconstruction of pressure wavefields in the crossline direction using multicomponent streamer recordings, 78th Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstracts, 2988-2992.
Robinson, E., and Treitel, S., 1980, Maximum entropy and the relationship of the partial autocorrelation to the reflection coefficients of a layered system. IEEE Trans. Acoust., Speech, Signal Process., 28(2), 224-235.
Schneider, W. A., and Backus, M. M., 1964, Ocean-bottom seismic measurements off the California coast, J. Geophys. Res., 69(6), 1135-1143.
Shannon, C. E., 1949, Communication in the presence of noise, Proc. I.R.E., 86(1), 10-21.
Sheriff, R. E., and Geldart, L. P., 1995, Exploration seismology, Cambridge university press.
Siliqi, R., Payen, T., Sablon, R., and Desrues, K., 2013, Synchronized multi-level source, a robust broadband marine solution, 83rd Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstract, 56-60.
Sonneland, L., Berg, L. E., Eidsvig, P., Haugen, A., Fotland, B., and Vestby, J., 1986, 2-D deghosting using vertical receiver arrays, 56th Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstract, 516-519.
Soubaras, R., and Dowle, R., 2010, Variable-depth streamer-a broadband marine solution, First Break, 28(12), 89-96.
Soubaras, R., and Lafet, Y., 2013, Variable-depth streamer acquisition: Broadband data for imaging and inversion, Geophysics, 78(2), WA27-WA39.
Tenghamn, R., and Dhelie, P. E., 2009, GeoStreamer-increasing the signal-to-noise ratio using a dual-sensor towed streamer, First Break, 27(10), 45-51.
Tenghamn, S. R. L., Sodal, A., and Stenzel, A., 2007a, Apparatus and methods for multicomponent marine geophysical data gathering, U.S. Patent No. 7,239,577.
Tenghamn, R., Vaage, S., and Borresen, C., 2007b, A dualsensor towed marine streamer: Its viable implementation and initial results, 77th Ann. Internal. Mtg. Soc. Expl. Geophys., Expanded Abstract, 989-993.
Vaage, S. T., Tenghamn, S. R. L., and Borresen, C. N., 2008, System for combining signals of pressure sensors and particle motion sensors in marine seismic streamers, U.S. Patent No. 7,359,283.
Van Melle, F. A., and Weatherburn, K. R., 1953, Ghost reflections caused by energy initially reflected above the level of the shot, Geophysics, 18(4), 793-804.
Widess, M. B., 1973, How thin is a thin bed?, Geophysics, 38(6), 1176-1180.
Woodburn, N., Travis, T., and Masoomzadeh, H., 2012, Clari-FiTM broadband data from conventional streamer acquisition, GEO ExPro, 9(5).
Yilmaz, O., 2001, Seismic data analysis: Processing, inversion, and interpretation of seismic data, Soc. Expl. Geophys.
Zhou, Z., Cvetkovic, M., Xu, B., and Fontana, P., 2012, Analysis of a broadband processing technology applicable to conventional streamer data, First Break, 30(10), 77-82.
*원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다.
오픈액세스 학술지에 출판된 논문
※ AI-Helper는 부적절한 답변을 할 수 있습니다.