IGGCAS OpenIR  > 油气资源研究院重点实验室
3D diffraction imaging with Kirchhoff time migration using vertical traveltime difference gathers
Li, Zhengwei1; Zhang, Jianfeng1,2
2019-11-01
Source PublicationGEOPHYSICS
ISSN0016-8033
Volume84Issue:6Pages:S555-S566
AbstractWe have built a vertical traveltime difference (VTD) gather to image diffractions in the 3D time domain. This significantly improves detection of small-scale faults and heterogeneities in 3D seismic data. The VTD gather is obtained using 3D Kirchhoff prestack time migration based on the traveltime-related inline and crossline dip angles, which is closely related to the 2D dip-angle gather. In VTD gathers, diffraction events exhibit flattening, whereas reflection events have convex upward-sloping shapes. Different from the 2D dip-angle gather, Fresnel zone-related specular reflections are precisely focused on the given regions over all offsets and azimuths, thus leaving more diffraction energy after muting. To image linear diffractors, such as faults in three dimensions, the VTD gather can be extended into two dimensions by adding a dipazimuth dimension. This makes it possible to correct phases of edge diffractions and detect the orientations of the linear diffractors. The memory requirement of the VTD or VTD plus azimuth gathers is much less than that of the 2D dip-angle gathers. We can store the gathers at each lateral position and then correct the phase and enhance the weak diffractions in 3D cases. Synthetic and field data tests demonstrate the effectiveness of our 3D diffraction imaging method.
DOI10.1190/GEO2018-0630.1
Funding OrganizationNational Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China
WOS KeywordSEPARATION
Language英语
Funding ProjectNational Natural Science Fund of China[41330316] ; National Natural Science Fund of China[41574135] ; National Major Project of China[2017ZX05008-007]
Funding OrganizationNational Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000501594400024
PublisherSOC EXPLORATION GEOPHYSICISTS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95832
Collection油气资源研究院重点实验室
Corresponding AuthorZhang, Jianfeng
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Zhengwei,Zhang, Jianfeng. 3D diffraction imaging with Kirchhoff time migration using vertical traveltime difference gathers[J]. GEOPHYSICS,2019,84(6):S555-S566.
APA Li, Zhengwei,&Zhang, Jianfeng.(2019).3D diffraction imaging with Kirchhoff time migration using vertical traveltime difference gathers.GEOPHYSICS,84(6),S555-S566.
MLA Li, Zhengwei,et al."3D diffraction imaging with Kirchhoff time migration using vertical traveltime difference gathers".GEOPHYSICS 84.6(2019):S555-S566.
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