Double-phase-shift filtering method for eliminating harmonic distortion in processing slip-sweep vibroseismic signals
LI Bolin1, WANG Yanchun1, LIU Xueqing2, ZHANG Jingdong3, LI Yunzhu4, SUN Tingbin3
1. School of Geophysics and Information Techno-logy, China University of Geosciences(Beijing), Beijing 100083, China; 2. Beijing Jingneng Oil & Gas Resources Development Co. Ltd, Beijing 100022, China; 3. BGP Geological Research Center, CNPC, Zhuo-zhou, Hebei 072751, China; 4. CCDC Geological Exploration & Development Research Institute, CNPC, Chengdu, Sichuan 610051, China
Abstract:Although simple and efficient for eliminating harmonic distortion of vibroseismic data, the single-phase-shift filtering method is less effective for dealing with complex signals such as white noise and signals recorded by slip-sweep vibroseis survey, so it failed to be put into actual application. In view of this situation, we propose a double-phase-shift filtering method. It manipulates and polishes the original phase shift from the traditional phase shift method, and at the same time carries out another phase shift to process the signal that the single-phase-shift filtering method cannot process. Applied on model data, the double-phase-shift method can suppress harmonic distortion more effectively than the single-phase-shift me-thod. Then we applied the double-phase-shift filtering method to slip-sweep signals, and analyzed the applicable conditions. In view of the fact that raw seismic data are composed of various reflections with different intensity, a subsurface model with multiple reflections should be established, and the frequency ratio of signals should be consi-dered in order to discuss the applicability of the double-phase-shift method. Applied for raw data and compared with the single-phase-shift filtering method, the double-phase-shift method is better in suppressing harmonic distortion and worthy promoting.
陈祖斌,林君,于生宝. 浅层地震可控震源系统的设计[J].电子测量与仪器学报,2002,16(1):43-48.CHEN Zubin,LIN Jun,YU Shengbao. The development of shallow seismic vibrator system[J].Journal of Electronic Measurement and Instrument,2002,16(1):43-48.
[2]
凌云,高军,孙德胜,等. 可控震源在地震勘探中的应用前景与问题分析[J].石油物探,2008,47(5):425-438.LING Yun,GAO Jun,SUN Desheng,et al. Vibroseis prospects and problems analysis in seismic exploration[J].Geophysical Prospecting for Petroleum,2008,47(5):425-438.
[3]
南文海,丁志淦. 可控震源发展中有关问题的探讨[J].物探装备,1999,9(2):26-29.NAN Wenhai,DING Zhigan. Discussion on the developing of vibroseis[J].Equipment for Geophysical Prospecting,1999,9(2):26-29.
[4]
佟训乾,林君,姜弢,等. 陆地可控震源发展综述[J].地球物理学进展,2012,27(5):1912-1921.TONG Xunqian,LIN Jun,JIANG Tao,et al. Summary of development of land vibrator[J].Progress in Geophysics,2012,27(5):1912-1921.
[5]
曹务祥. 谐波畸变特性分析[J].石油物探,2004,43(5):441-444.CAO Wuxiang. Character analysis of harmonic distortion[J].Geophysical Prospecting for Petroleum,2004,43(5):441-444.
[6]
Seriff A J,Kim W H. The effect of harmonic distortion in the use of vibratory surface sources[J].Geophysics,1970,35(2):234-246.
[7]
魏铁,于世东,于敏杰,等. 可控震源噪声分析[J].石油地球物理勘探,2008,43(增刊2):38-43.WEI Tie,YU Shidong,YU Minjie,et al. Analysis of noise in vibroseis[J].Oil Geophysical Prospecting,2008,43(S2):38-43.
[8]
Rozemond H J. Slip sweep acquisition[C].SEG Technical Program Expanded Abstracts,1996,15:64-67.
Schrodt J K. Techniques for improving vibroseis data[J].Geophysics,1987,52(4):469-482.
[11]
Martin J E,White R E. Two methods for continuous monitoring of harmonic distortion in vibroseis signals[J].Geophysical Prospecting,1989,37(7):851-872.
[12]
Ruest D K. Vibrator force control:how simple can it get?[J].The Leading Edge,1995,14(11):1129-1133.
[13]
Lebedev A V,Beresnev L A. Nonlinear distortion of signals radiated by vibroseis sources[J].Geophysics,2004,69(4):968-977.
[14]
Lebedev A V,Beresnev L A,Vermeer P L. Model parameters of the nonlinear stiffness of the vibrator-ground contact determined by inversion of vibrator accelerometer data[J].Geophysics,2006,71(3):H25-H32.
[15]
Okaya D A,Karageorgi E,McEvilly T V. Removing vibrator-induced correlation artifacts by filtering in frequency-uncorrelated time space[J].Geophysics,1992,57(7):916-926.
[16]
Ras P,Daly M,Baeten G,et al. Harmonic distortion in slip sweep records[C].SEG Technical Program Expanded Abstracts,1999,18:609-612.
[17]
Dal Moro G,Scholtz P,Iranpour K. Harmonic noise attenuation for vibroseis data[J].GNGTS,2007,3(2):511-513.
[18]
伍建,王润秋,魏加明,等. 可控震源地震数据谐波滤除方法[J].石油地球物理勘探,2014,49(1):47-52.WU Jian,WANG Runqiu,WEI Jiaming,et al. A method for vibroseis data harmonic filtering[J]. Oil Geophysical Prospecting, 2014, 49(1):47-52.
[19]
张连群,陈宝书,李松康,等. 白云凹陷陆架-陆坡区多次波压制技术[J].石油地球物理勘探,2018,53(2):236-242.ZHANG Lianqun,CHEN Baoshu,LI Songkang,et al. Multiple suppression in continental shelf and slope a-reas of Baiyun Depression[J].Oil Geophysical Pro-specting,2018,53(2):236-242.
[20]
陈泓竹,王彦春. 频率域拉东变换加权约束反演压制层间多次波[J].石油地球物理勘探,2018,53(4):666-673.CHEN Hongzhu,WANG Yanchun. Peg-leg multiple suppression with the weight-constrain inversion of Radon transform in the frequency domain in Songliao Basin[J].Oil Geophysical Prospecting,2018,53(4):666-673.
[21]
刘语,刘建红,刘国峰,等. 陆上地震资料多次波识别与压制技术[J].石油地球物理勘探,2018,53(增刊1):24-28.LIU Yu,LIU Jianhong,LIU Guofeng,et al. Multiple identification and suppression on land seismic data[J].Oil Geophysical Prospecting,2018,53(S1):24-28.
[22]
戴晓峰,徐右平,甘利灯,等. 川中深层-超深层多次波识别和压制技术——以高石梯-磨溪连片三维区为例[J].石油地球物理勘探,2019,54(1):54-64.DAI Xiaofeng,XU Youping,GAN Lideng,et al. Deep & ultra-deep multiple suppression in Central Sichuan:an example of Gaoshiti-Moxi[J].Oil Geophysical Pro-specting,2019,54(1):54-64.
[23]
毕丽飞,秦宁,李钟晓,等. 应用逆散射级数波场预测和2D卷积盲分离压制层间多次波[J].石油地球物理勘探,2020,55(3):521-529.BI Lifei,QIN Ning,LI Zhongxiao,et al. Wavefield prediction with inverse scattering series and 2D blind separation of convolved mixtures for suppressing internal multiples[J]. Oil Geophysical Prospecting,2020,55(3):521-529.
[24]
Li X P. Decomposition of vibroseis data by multiple filter technique[C].SEG Technical Program Expan-ded Abstracts,1994,13:711-714.
[25]
Li X P,Sollner W,Hubral P. Elimination of harmonic distortion in vibroseis data[J].Geophysics,1995,60(2):503-516.