Energy-stack imaging with structural dip constraint
Yuan Maolin1,2, Huang Jianping1, Li Zhenchun1, Zhang Jiguang3, Zhao Shengtian3
1. School of Geosiences, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
2. SINOPEC Exploration Company, Chengdu, Sichuan 610041, China;
3. Geophysical Research Institute, Shengli Oilfield Branch Co., SINOPEC, Dongying, Shandong 257000, China
Abstract：According to noise response characteristics of reflected waves and diffracted waves in the dip-angle domain common image gathers(DDCIG), we propose in this paper an energy-stack imaging approach with structural dip constraint. First we extract DDCIGs with Gaussian beam prestack depth migration, and identify noise, reflection and diffraction energy on low S/N data. Then we divide stack blocks by combining migration sections and geological information in the exploration areas. Finally we stack available energy with structural dip constraint. The proposed approach is tested on Marmousi model data and field data. And the test results suggest:A. This approach can effectively suppress migration noise and improve seismic S/N; B. This approach improve event continuity; C. This approach provides a friendly interactive function for processing control quality and parameter selection.
Biondi B, Symes W. Angle-domain common image gathers for migration velocity analysis by wavefield continuation imaging. Geophysics, 2004, 69(5):1283-1298.
[2]
Biondi B, Tisserant T, Symes W. Wavefield continuation angle-domain common-image gathers for migration velocity analysis. SEG Technical Program Expanded Abstracts, 2003,22:2104-2107.
[3]
De Hoop M V, Le Rousseau J H, Wu R S. Generalization of the phasescreen approximation for the scattering of acoustic waves. Wave Motion,2000,31(1):43-70.
[4]
Huang L, Fehler M C. Globally optimized Fourier finite-difference migration method. SEG Technical Program Expanded Abstracts, 2000,19:802-805.
[5]
Sava P C, Fomel S. Angle-domain common image gathers by wavefield continuation methods. Geophy-sics, 2003, 68(3):1065-1074.
[6]
Xu S, Chauris H, Lambare G et al. Common-angle image gather:A strategy for imaging complex media. SEG Technical Program Expanded Abstracts, 1998,17:1538-1541.
[7]
Audebert F, Froidevaux P, Rakotoarisoa H et al. Insights into migration in the angle domain. SEG Technical Program Expanded Abstracts, 2002,21:1188-1191.
[8]
Sava P C, Fomel S. Angle-domain common-image gathers by wavefield continuation methods. Geophy-sics, 2003, 68(3):1065-1074.
[9]
Koren Z, Ravve I. Full-azimuth subs urface angle domain wavefield decomposition and imaging:Part Ⅰ-Directional and reflection imaging gathers. Geophy-sics, 2011, 76(1):S1-S13.
[10]
Ravve I, Koren Z. Full-azimuth subsurface angle domain wavefield decomposition and imaging:Part Ⅱ-Local angle domain. Geophysics, 2011, 76(2):S51-S64.
[11]
Landa E, Fomel S, Reshef M. Separation imaging and velocity analysis of seismic diffractions using migrated dip-angle gathers. SEG Technical Program Expanded Abstracts, 2008, 27:2176-2180.
[12]
Reshef M, Landa E. Post-stack velocity analysis in the dip-angle domain using diffractions. Geophysical Prospecting, 2009, 57(5):811-821.
[13]
Li X F, Huang J P,Li Z C et al. The research of diff-raction migration velocity analysis method.75th EAGE Annual International Meeting Expanded Abstracts, 2013.
[14]
Klokov A, Baina R, Landa E et al. Diffraction imaging for fracture detection:synthetic case study. SEG Technical Program Expanded Abstracts, 2010,29:3354-3358.
[15]
Bai Y, Sun Z, Chen L et al. Seismic diffraction separation in 2D and 3D space.73rd EAGE Annual International Meeting Expanded Abstracts, 2011.
Audebert F, Froidevaux P, Huard I et al. A multi-angle toolbox for restored amplitude images and AVA gathers. SEG Technical Program Expanded Abstracts, 2000,19:1020-1023.
[18]
Audebert F, Nicoletis L, Froidevaux P et al. True amplitude migration in the angle domain by regularization of illumination. SEG Technical Program Expanded Abstracts, 2003, 22:921-924.
[19]
Qin F, Wang B, Zhang P et al. Kirchhoff preSDM interactive dip-gather stacking and dip illumination panel generation. SEG Technical Program Expanded Abstracts, 2005, 24:1882-1885.
[20]
Wang X C, Qin F Q, Sun C W. Practical use of Kirchhoff PSDM dip-gather stacking in complex areas with low S/N ratio. SEG Technical Program Expanded Abstracts, 2012, 31:1-5.
Huang Jianping, Yuan Maolin, Li Zhenchun et al. The accurate beam migration method without slant stack under dual-complexity conditions and its application(Ⅰ):Acoustic equation. Chinese Journal of Geophysics, 2015, 58(2):267-276.
Huang Jianping, Yuan Maolin, Li Zhenchun et al. An accurate elastic beam migration method without slant stack for complex surface and subsurface geological conditions. GPP, 2015, 54(1):56-63.
[23]
Hill N R. Gaussian beam migration. Geophysics,1990, 55(11):1416-1428.
Huang Jianping, Cao Xiaoli, Li Zhenchun et al. The application of least-squares reverse time migration to near-surface high-quality imaging. OGP, 2014,49(1):107-112.
Huang Jianping, Li Zhenchun, Kong Xue et al. A study of least-squares migration imaging method for fractured-type carbonate reservoir. Chinese Journal of Geophysics, 2013, 56(5):1716-1725.
