P-SV wave common receiver point stack algorithm with P-wave structure control
Tong Kailin1, Li Rui1, Tang Jianming2
1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu, Sichuan 610059, China;
2. Southwest Oilfield Branch Co., SINOPEC, Chengdu, Sichuan 610041, China
Abstract：In converted waves common receiver point (CRP) stack processing, conventional stack algorithms of P-wave structure control lead a few problems such as “unmatched structural horizons on P- and S-waves stacked sections”, “inaccurate calculation of structural corrections of P-SV wave data”, “converged local extremum”, and “zero space” drift, especially in complex areas with low signal-to-noise ratio data. We analyzed in this paper the theoretical principle of these conventional algorithms and propose solutions to improving matched quality of P- and S-wave stack, and suppressing the “zero space”. First structural horizons on P-wave CRP stack sections are used to match and control structural horizons on P-SV wave CRP stack sections. So structural horizons between P-wave CMP stack sections and P-SV wave ACCP stack sections are matched, and accurate structural corrections and vP/vS can be calculated. Absolute static corrections between CRP stack traces and flatted horizons of P-SV wave are estimated to overcome “zero space” drift. Applications to P-SV wave data indicate that this proposed approach can enhance residual static corrections of conventional CRP stack algorithms with P-wave structure control.
Cary P W, Eaton W S. A simple method for resolving large converted wave (P-SV) statics. Geophy-sics, 1993, 58(3):429-433.
[2]
Richard R, Van Dok I. Static correction for PS-wave surface seismic surveys, Recent advances in shear wave technology for reservoir characterization. SEG/EAGE Summer Research Workshop,2000,233-235.
Ma Zhaojun, Tang Jianming. A P-SV wave static correction method based on controlling structure time. Computing Techniques for Geophysical and Geochemical Exploration, 2008, 30(5):373-376.
[5]
Fjellanger J P, Boen F, Ronning K J. Successful use of converted wave data for interpretation and well optimization on Grane. SEG Technical Program Expanded Abstracts, 2006, 25:1138-1142.
[6]
Edme P, Kragh E. Near-surface S-wave velocity estimation from P-wave polarization analysis. SEG Technical Program Expanded Abstracts, 2009, 28:4289-4292.
[7]
David W E,Don C L. P-SV stacking charts and binning periodicity. Geophysics,1992,57(5):745-748.
[8]
Rothman D H. Nonlinear inversion, statistical me-chanics, and residual statics estimation. Geophysics, 1985, 50(12):2784-2796.
[9]
Ronen J and Claerbout J F.Surface-consistent residual statics estimation by stack power maximization.Geophysics,1985,50(12):2759-2767.
[10]
Stewart R R, Gaiser J E, Brown R J et al. Converted-wave seismic exploration: Application.Geophy-sics,2003,68(1):40-57.
Sang Yunyun, Sun Junxiao, Jiao Shuping et al. Shortest path raytracing based on parabolic traveltime interpolation in irregular topography.GPP,2014,53(2):142-148.
Liu Cai, Yang Qingjie, Geng Meixia. P-SV wave identification technique by velocity scanning for multiwave multi-component seismic data. GPP,2013,52(4):383-387.
Liu Yuping, Pan Weiguo, Ding Feihao et al. Application and effect of combined static correction method of converted wave. Progress in Geophysics,2014,29(2):805-814.
Cao Zhonglin, Zhou Qiang, Lü Wenbiao et al. Appli-cation of improved Guotao algorithm in residual static correction. Journal of Oil and Gas Technology, 2014, 36(2):62-65.
Cha Wenfeng, Yu Xiaolei. The optimal selection and comprehensive application of the static correction in the complex shallow surface structure areas. Progress in Geophysics, 2014, 29(2):958-965.
Zhao Zhonghua. Application of residual static correction based on low frequency model trace in seismic data processing of Changyuan oilfield. Reservoir Evaluation and Development,2014, 4(1):16-20.
Chen Haifeng, Li Xiangyang, Qian Zhongping et al. Estimating C-wave receiver large statics associated with P-wave imaging. Progress in Geophysics,2014,29(1):306-311.
Liu Cai, Lu Yongxu, Feng Xuan et al. Serial fusion algorithm of group PSO and maximum energy method for converted-wave static correction. Chinese Journal of Geophysics,2013,56(1):239-245.
Zhang Zhengfeng, Guo Jian, Han Liguo et al. Transformation coordination converted wave static correction based on wave field continuation. Chinese Journal of Geophysics,2013, 56(5):1676-1685.
