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S1P/S2P wave separation and shear wave splitting correction for SVP data |
YUE Yuanyuan, QIAN Zhongping, NIE Hongmei, SUN Pengyuan, DENG Zhiwen, LI Jianfeng |
BGP Inc., CNPC, Zhuozhou, Hebei 072751, China |
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Abstract For shear(S)-wave source seismic exploration, extracting fracture information from the data and performing fast/slow S-wave separation and S-wave splitting correction are of great significance for S-wave seismic data imaging with azimuthal anisotropy. The difference between SP converted wave (P-wave converted from S-wave) in S-wave source exploration data and PS converted wave (S-wave converted from P-wave) is that the S-wave splitting occurs in the process of downgoing wave or upgoing wave propagation. Therefore, the S-wave splitting characteristics of the SP wave are similar to those of the PS wave. In this paper, the tangent energy minimization method of PS wave is applied to the S-wave splitting analysis of SP wave to find the direction of underground cracks. In the application of 3D nine-component (3D9C) actual data, a technical process is formed based on the preprocessing of SP wave seismic data including common conversion point (CCP) gather extraction and NMO correction, and the corresponding crack direction of CCP is obtained by azimuthal superposition. In addition, the fast and slow converted (S1P and S2P) wave separation is carried out. At the same time, a strategy is proposed to obtain the time difference by picking up the horizon on the fast and slow wave superimposed profile. After the time difference is applied to the S-wave splitting correction, SVP without the S-wave splitting effect is obtained, and the image quality of the profile is improved. The application results of synthetic data and actual data show that the imaging profiles of S1P and S2P waves are significantly improved compared with those before separation, and the SVP reflection energy is improved after S-wave splitting correction, which verifies the feasibility of the proposed method for fast and slow wave separation and S-wave splitting correction in actual SP wave seismic data.
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Received: 01 December 2022
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[1] |
YUE Y Y,LI J F,QIAN Z P,et al. Converted wave splitting analysis and application[C]. Extended Abstracts of 75th EAGE Conference & Exhibition,2013,cp-348.
|
[2] |
LYNN H B,THOMSEN L A. Reflection shear-wave data along the principal axes of azimuthal anisotropy[C]. SEG Technical Program Expanded Abstracts,1986,5:473-476.
|
[3] |
ALFORD R. Shear data in the presence of azimuthal anisotropy:Dilley,Texas[C]. SEG Technical Program Expanded Abstracts,1986,5:476-479.
|
[4] |
LI X Y,CRAMPIN S. Linear-transform techniques for processing shear-wave anisotropy in four-component seismic data[J]. Geophysics,1993,58(2):240-256.
|
[5] |
YUE Y Y,QIAN Z P,SUN P Y,et al. 2C SS wave splitting analysis and correction for multi fracture layers[C]. SEG Technical Program Expanded Abstracts,2020,39:1825-1829.
|
[6] |
CHICHININA T, OBOLENTSEVA I, GORSHKALEV S,et al. Cross-correlation-function method for separation of shear waves S1 and S2 in azimuthally anisotropic media and an example of its application with real data[C]. SEG Technical Program Expanded Abstracts,2012,31:1-6.
|
[7] |
SIMMONS J L. Converted-wave splitting estimation and compensation[J]. Geophysics,2009,74(1):D37-D48.
|
[8] |
BALE R A,LI J,MATTOCKS B,et al. Robust estimation of fracture directions from 3-D converted-waves[C]. SEG Technical Program Expanded Abstracts,2005,24:889-892.
|
[9] |
李彦鹏,马在田. 快慢波分离及其在裂隙检测中的应用[J]. 石油地球物理勘探,2000,35(4):428-432.LI Yanpeng,MA Zaitian. Separation of fast wave from slow wave and its application to fracture detection[J].Oil Geophysical Prospecting,2000,35(4): 428-432.
|
[10] |
肖维德,徐天吉,丁蔚楠. 利用转换横波层剥离分析技术检测裂缝[J]. 石油地球物理勘探,2013,48(6):966-971.XIAO Weide, XU Tianji, DING Weinan. Fracture detection with layer stripping of PS wave splitting[J]. Oil Geophysical Prospecting,2013, 48(6): 966-971.
|
[11] |
张学映,马昭军,徐每. 多层裂缝介质转换横波分裂分析技术及应用[J]. 新疆石油地质,2009,30(3):337-340 ZHANG Xueying, MA Zhaojun, XU Mei. Technique and application of converted-wave splitting for multi-layer fracture media[J]. Xinjiang Petroleum Geology, 2009, 30(3):337-340
|
[12] |
张建利,王赟,刘志斌,等. 三种双扫描横波分裂算法在裂缝探测中的应用研究[J]. 石油地球物理勘探, 2017,52(1):105-113.ZHANG Jianli,WANG Yun,LIU Zhibin,et al. Fracture detection with three dual scanning shear wave splitting methods[J]. Oil Geophysical Prospecting,2017, 52(1):105-113.
|
[13] |
BALE R,MARCHAND T,WILKINSON K,et al. Processing 3-C heavy oil data for shallow shear-wave splitting properties:Methods and case study[J]. CSEG Recorder,2012,37:24-32.
|
[14] |
LI X Y. Processing PP and PS waves in multicomponent sea-floor data for azimuthal anisotropy:theory and overview[J]. Oil & Gas Science and Technology,1998,53(5):607-620.
|
[15] |
YUE Y Y,QIAN Z P,NIE H M,et al. S1P and S2P separation and shear wave splitting correction for SVP data[C]. Expanded Abstracts of Second International Meeting for Applied Geoscience & Energy,SEG/AAPG,2022,125-129.
|
[16] |
YUE Y Y,SUN P Y,SONG Q G,et al. S1 and S2 separation based on SS wave splitting analysis[C]. Expanded Abstracts of First International Meeting for Applied Geoscience & Energy,SEG/AAPG,2021,1801-1805.
|
[17] |
DENG Z W,ZHANG R,GOU L,et al. Direct shear-wave seismic survey in Sanhu area,Qaidam Basin,west China[J]. The Leading Edge,2022(1):47-53.
|
[18] |
公亭,王兆磊,罗文山,等. 横波源三维地震资料矢量横波四分量旋转和快慢波分离技术[J]. 石油地球物理勘探,2022,57(5):1028-1034.GONG Ting,WANG Zhaolei,LUO Wenshan,et al. Four-component rotation and fast-slow wave separation techniques for 3D vector S-wave seismic data of S-wave sources[J]. Oil Geophysical Prospecting,2022,57(5):1028-1034.
|
[19] |
钱忠平,孙鹏远,熊定钰,等. 复杂构造转换波静校正方法研究及应用[J]. 石油地球物理勘探,2023,58(2):325-334.QIAN Zhongping, SUN Pengyuan, XIONG Dingyu, et al. Research and application of static correction method for converted waves of complex structure[J]. Oil Geophysical Prospecting,2023, 58(2):325-334.
|
[20] |
DENG Z W,LI C W,CHEN G W,et al, The application of pure shear wave seismic data for gas reservoir delineation[C]. SEG Technical Program Expanded Abstracts,2019,38:2690-2694.
|
|
|
|