摘要：Phase information of seismic signals is sensitive to subsurface discontinuities. However, 1D phase attributes are not robust when dealing with noisy data. In addition, variations of seismic phase attributes with azimuth are seldom explored. To address these issues, we have developed 6D phase-difference attributes (PDAs) derived from azimuthal phase-frequency spectra. For the seismic volume of a certain azimuth and frequency, we first construct stacked phase traces at each common-depth point along a certain decomposed trending direction. Then, the 6D PDA is extracted by calculating the complex-valued covariance at a 6D phase space. The proposed method enables characterization of the subsurface discontinuities and indicates seismic anisotropy. Moreover, we provide one q-value attribute obtained by singular value decomposition to describe the variation intensity of PDA along different azimuths. Simulated and field wide-azimuth seismic data sets are used to illustrate the performance of the proposed 6D PDA and the derived q-value attribute. The results show that PDA at different frequencies can image various geologic features, including faults, fracture groups, and karst caves. Our field data example shows that PDA is able to discern the connectivity of karst caves using large-azimuth data. In addition, PDA along different azimuths and the q-value attribute provide a measurement of azimuthal variations, as well as the anisotropy. Our 6D PDA method can be used as a potential tool for wide-azimuth seismic data interpretation.

ISSN号：0016-8033

卷、期、页：卷: 85期: 6页: IM37-IM49

发表日期：2020-11-01

影响因子：2.608800

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,地学领域高质量科技期刊分级目录（国外T1）,SCIE（科学引文索引网络版）

发表期刊名称：GEOPHYSICS

参与作者：Wang, Jinghan,Liu, Tao,Xie, Tao

第一作者：袁三一,王尚旭

论文类型：期刊论文

论文概要：袁三一,Wang, Jinghan,Liu, Tao,Xie, Tao,王尚旭，6D phase-difference attributes for wide-azimuth seismic data interpretation，GEOPHYSICS，2020，卷: 85期: 6页: IM37-IM49

论文题目：6D phase-difference attributes for wide-azimuth seismic data interpretation