Development of the Strip-off CDR Velocity Analysis for a Constant Velocity Macro-model

doi:10.12972/ksmer.2014.51.2.178

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2014 Vol.51, Issue 2 Preview Page Next Page

Research Paper

Development of the Strip-off CDR Velocity Analysis for a Constant Velocity Macro-model 일정속도 매크로 모델 Strip-off CDR 속도분석법의 개발: 최윤경·신창수·이성철
Yun Gyeong Choi, Changsoo Shin, Sungchul Lee

30 April 2014. pp. 178-192

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Abstract

The velocity analysis method with CDR(Controlled Directional Reception) ray-tracing are developed. With the local slant stack method traveltimes and ray-parameters are autopicked. We have developed a method for selecting velocities and boundaries of the constant velocity macro-model using CDR ray-tracing. We have applied the CDR ray-tracing with velocity scanning. The focusing conditions of the end points of two rays are used to determine the velocity of the block. With selected velocity, we choose interactively the boundary points within the selected upper and lower limits. We have obtained the slopes of the boundary simultaneously, which are used to calculate the angles of rays of the next block with Snell’s law. In this way, we can determine the velocities and layer boundaries of all blocks step by step successively. In this study, we have applied this strip-off CDR velocity analysis for constant velocity macro-model to a two-dimensional synthetic data.

Keywords

CDR(Controlled Directional Reception) ray-tracing

Velocity analysis

Constant velocity Macro-model

Local slant stack

Velocity scanning

CDR(Controlled Directional Reception) 파선추적을 사용하는 속도분석법을 개발하였다. 국소 경사 겹쌓기(local slant stack)을 적용하여 탄성파의 주시와 파선 매개변수를 자동추출할 수 있도록 프로그램을 구현하였고 일정속도 매크로모델에 CDR 파선추적을 수행하여 블록의 속도와 경계를 결정하는 방법을 개발하였다. 빠른 파선추적 계산속도로 인해 속도 훓기(velocity scanning) CDR 파선추적을 수행할 수 있었고, 두 파선의 종착점이 가장 잘 근접하는 속도를 그 블록의 최적속도로 결정하였다. 결정된 블록의 최적속도로 CDR 파선추적을 수행한 후 선택된 상한-하한 심도범위 내의 경계점의 위치를 결정하였다. 동시에 경계점에서의 경사각을 구하여 다음 블록의 파선의 방향 설정시 스넬의 법칙을 사용할 수 있도록 하였다. 이와 같은 방법을 각 블록에 순차적으로 적용하면 모든 블록의 속도와 경계면을 결정할 수 있다. 본 연구에서 개발한 일정속도 매크로 모델 strip-off CDR 속도분석법을 합성 탄성파자료에 적용해서 좋은 결과를 얻을 수 있었다.

키워드

CDR(Controlled Directional Reception) 파선추적

속도분석

일정속도 매크로모델

국소 경사 겹쌓기

속도 훓기

References

Al-Yahya, K., 1989, “Velocity analysis by iterative profile migration,” Geophysics, Vol. 54, No. 6, pp. 718-729.
Billette, F. and Lambaré, G., 1998, “Velocity macro-model estimation from seismic reflection data by stereotomography,” Geophys. J. Internat., Vol. 135, No. 2, pp. 671-680.
Biondi, B., 1990, Seismic velocity estimation by beam stack, PhD thesis, Stanford University, USA.
Biondi, B., 1992, “Velocity estimation by beam stack,” Geophysics, Vol. 57, No. 8, pp. 1034-1047.
Cheong, S., Kim, Y.J., Kim, W.S., Koo, N.H., Kim, J.H. and Lee, H.Y., 2013, “Long offset seismic data processing for deep water hydrocarbon survey of Ulleung basin, East sea, Korea,” J. of The Korean Society of Mineral and Energy Resources Engineers, Vol. 50, No. 1, pp. 1-10.
Deregowski, S.M., 1990, “Common-offset migration and velocity analysis,” First break, Vol. 8, No. 6, pp. 225-234.
Dix, C.H., 1955, “Seismic velocities from surface measurements,” Geophysics, Vol. 20, No. 1, pp. 68-86.
Doherty, S. and Claerbout, J., 1976, “Structure independent velocity estimation,” Geophysics, Vol. 41, No. 5, pp. 850-881.
Faye, J.P. and Jeannot, J.P., 1986, “Prestack migration velocities from focusing depth analysis,” Expanded Abstract of SEG 52^th Annual International Meeting, Houston, Soc. Expl. Geophys., Expanded Abstracts, pp. 438-440.
Ji, J. and Choi, Y.G., 2010, “3D seismic data processing methodology using public domain software system,” Geophysics and Geophysical Exploration, Vol. 13, No. 2, pp. 159-168.
Kwon, T., Byun, J. and Seol, S.J., 2013, “Automatic velocity analysis considering anisotropy,” J. of The Korean Society of Mineral and Energy Resources Engineers, Vol. 50, No. 1, pp. 11-20.
Lafond, C.F. and Levander, A.R., 1993, “Migration moveout analysis and depth focusing,” Geophysics, Vol. 58, No. 1, pp. 91-100.
Liu, Z., 1995, Migration velocity anlaysis, PhD Thesis, Center for Wave Phenomena, Colorado School of Mines, Golden CO, USA.
Liu, Z. and Bleistein, N., 1995, “Migration velocity analysis: theory and an iterative algorithm,” Geophysics, Vol. 60, No. 1, pp. 142-153.
MacKay, S. and Abma, R., 1992, “Imaging and velocity estimation with depth-focusing analysis,” Geophysics, Vol. 57, No. 12, pp. 1608-1622.
MacKay, S. and Abma, R., 1993, “Depth-focusing analysis using a wavefront-curvature criterion,” Geophysics, Vol. 58, No. 8, pp. 1148-1156.
Riabinkin, L.A., Napalkov, Yu.V., Znamenskiy, V.V., Voskresenskiy, Yu.N. and Rapoport, M.C., 1962, “Teoriya i praktika seysmicheskogo metoda RNP (Theory and practice of the CDR seismic method),” Transaction of the Gubkin Institute of Petrochemical and Gas Production, Vol. 39, Gostoptekhizdat, Moscow (in Russian).
Rieber, F., 1936, “A new reflection system with controlled directional sensitivity,” Geophysics, Vol. 1, No. 1, pp. 97-106.
Sword, C.H., 1984, “The method of controlled directional reception,” SEP-41, Stanford University, pp. 369-393.
Sword, C.H., 1986, “Tomographic determination of interval velocities from picked reflection seismic data,” Expanded Abstract of SEG 56^th Annual International Meeting, Houston, Soc. Expl. Geophys., Expanded Abstracts, pp. 657-660.
Sword, C.H., 1987, Tomographic determination of interval velocities from reflection seismic data: The method of controlled directional reception, PhD Thesis, Stanford University, USA.
Yilmaz, O. and Chambers, R., 1984, “Migration velocity analysis by wave-field extrapolation,” Geophysics, Vol. 49, No. 10, pp. 1664-1674.
Zavalishin, B.R., 1982, “Improvements in constructing seismic images using the method of controlled directional reception,” Expanded Abstract of SEG 52^th Annual International Meeting, Dallas, Soc. Expl. Geophys., pp. 121-122.

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 : 51
No :2
Pages :178-192
DOI :https://doi.org/10.12972/ksmer.2014.51.2.178

[1] Al-Yahya, K., 1989, “Velocity analysis by iterative profile migration,” Geophysics, Vol. 54, No. 6, pp. 718-729.

[2] Billette, F. and Lambaré, G., 1998, “Velocity macro-model estimation from seismic reflection data by stereotomography,” Geophys. J. Internat., Vol. 135, No. 2, pp. 671-680.

[3] Biondi, B., 1990, Seismic velocity estimation by beam stack, PhD thesis, Stanford University, USA.

[4] Biondi, B., 1992, “Velocity estimation by beam stack,” Geophysics, Vol. 57, No. 8, pp. 1034-1047.

[5] Cheong, S., Kim, Y.J., Kim, W.S., Koo, N.H., Kim, J.H. and Lee, H.Y., 2013, “Long offset seismic data processing for deep water hydrocarbon survey of Ulleung basin, East sea, Korea,” J. of The Korean Society of Mineral and Energy Resources Engineers, Vol. 50, No. 1, pp. 1-10.

[6] Deregowski, S.M., 1990, “Common-offset migration and velocity analysis,” First break, Vol. 8, No. 6, pp. 225-234.

[7] Dix, C.H., 1955, “Seismic velocities from surface measurements,” Geophysics, Vol. 20, No. 1, pp. 68-86.

[8] Doherty, S. and Claerbout, J., 1976, “Structure independent velocity estimation,” Geophysics, Vol. 41, No. 5, pp. 850-881.

[9] Faye, J.P. and Jeannot, J.P., 1986, “Prestack migration velocities from focusing depth analysis,” Expanded Abstract of SEG 52^th Annual International Meeting, Houston, Soc. Expl. Geophys., Expanded Abstracts, pp. 438-440.

[10] Ji, J. and Choi, Y.G., 2010, “3D seismic data processing methodology using public domain software system,” Geophysics and Geophysical Exploration, Vol. 13, No. 2, pp. 159-168.

[11] Kwon, T., Byun, J. and Seol, S.J., 2013, “Automatic velocity analysis considering anisotropy,” J. of The Korean Society of Mineral and Energy Resources Engineers, Vol. 50, No. 1, pp. 11-20.

[12] Lafond, C.F. and Levander, A.R., 1993, “Migration moveout analysis and depth focusing,” Geophysics, Vol. 58, No. 1, pp. 91-100.

[13] Liu, Z., 1995, Migration velocity anlaysis, PhD Thesis, Center for Wave Phenomena, Colorado School of Mines, Golden CO, USA.

[14] Liu, Z. and Bleistein, N., 1995, “Migration velocity analysis: theory and an iterative algorithm,” Geophysics, Vol. 60, No. 1, pp. 142-153.

[15] MacKay, S. and Abma, R., 1992, “Imaging and velocity estimation with depth-focusing analysis,” Geophysics, Vol. 57, No. 12, pp. 1608-1622.

[16] MacKay, S. and Abma, R., 1993, “Depth-focusing analysis using a wavefront-curvature criterion,” Geophysics, Vol. 58, No. 8, pp. 1148-1156.

[17] Riabinkin, L.A., Napalkov, Yu.V., Znamenskiy, V.V., Voskresenskiy, Yu.N. and Rapoport, M.C., 1962, “Teoriya i praktika seysmicheskogo metoda RNP (Theory and practice of the CDR seismic method),” Transaction of the Gubkin Institute of Petrochemical and Gas Production, Vol. 39, Gostoptekhizdat, Moscow (in Russian).

[18] Rieber, F., 1936, “A new reflection system with controlled directional sensitivity,” Geophysics, Vol. 1, No. 1, pp. 97-106.

[19] Sword, C.H., 1984, “The method of controlled directional reception,” SEP-41, Stanford University, pp. 369-393.

[20] Sword, C.H., 1986, “Tomographic determination of interval velocities from picked reflection seismic data,” Expanded Abstract of SEG 56^th Annual International Meeting, Houston, Soc. Expl. Geophys., Expanded Abstracts, pp. 657-660.

[21] Sword, C.H., 1987, Tomographic determination of interval velocities from reflection seismic data: The method of controlled directional reception, PhD Thesis, Stanford University, USA.

[22] Yilmaz, O. and Chambers, R., 1984, “Migration velocity analysis by wave-field extrapolation,” Geophysics, Vol. 49, No. 10, pp. 1664-1674.

[23] Zavalishin, B.R., 1982, “Improvements in constructing seismic images using the method of controlled directional reception,” Expanded Abstract of SEG 52^th Annual International Meeting, Dallas, Soc. Expl. Geophys., pp. 121-122.

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