DOI: 10.1016/j.tecto.2021.229008
论文题名: Impacts of seismic resolution on fault interpretation: Insights from seismic modelling
作者: Faleide T.S. ; Braathen A. ; Lecomte I. ; Mulrooney M.J. ; Midtkandal I. ; Bugge A.J. ; Planke S.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 816 语种: 英语
中文关键词: Faults
; Interpretation uncertainty
; Seismic imaging and resolution
; Seismic modelling
; Statistical analyses
英文关键词: Geophysical prospecting
; Mapping
; Optical transfer function
; Seismic response
; Seismic waves
; Turing machines
; Automatic machines
; Displacement value
; Fault interpretation
; Fault stability analysis
; High resolution data
; High resolution seismic data
; Subjective uncertainty
; Vertical resolution
; Uncertainty analysis
英文摘要: Seismic mapping of subsurface faults is hampered by factors such as seismic resolution, velocity control for depth conversion and human bias. Here, we explore the challenges and pitfalls related to interpreting normal faults by comparing objective and subjective uncertainties. A panel of 20 interpreters, with different geoscientific backgrounds, interpreted faults in modern conventional (dominant frequency 40 Hz) and high-resolution P-Cable (dominant frequency 150 Hz) 3D seismic data from the Hoop area, SW Barents Sea. The interpretations created by the test-panel were sorted into 10 scenarios characterized by different fault geometries. These scenarios were explored with 2(3)D point-spread function based convolution seismic modelling to investigate the potential of seismic data to image detailed fault architectures. The results reveal that: (1) Statistical analysis shows considerable variations between manually picked faults. (2) Identifying the location of fault tips is challenging and smaller antithetic faults are rarely recognizable. (3) Uncertainties arise from masking of closely spaced fault segments even where displacement values are large, showing distorted reflection signatures of apparent extensional fault tip monoclines. The distortion is larger for conventional versus high-resolution data. (4) In the conventional and high-resolution seismic data the vertical resolution of closely spaced reflections and small offset faults is 20 m and 5 m, respectively. (5) The utilisation of high-resolution seismic data, combined with seismic modelling, add confidence to interpretation of conventional seismic data in the same area. We conclude that subsurface fault mapping with seismic data requires insight in objective uncertainties associated with the data. Automatic machine-learning fault interpretation is void of subjective bias but still hampered by objective limitations. Further, a risking workflow requires acknowledgement of uncertainties that are transferred to seismic based fault analysis techniques such as juxtaposition analysis, quantitative fault seal analysis, and fault stability analysis. © 2021 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170803
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Department of Geosciences, University of Oslo, Box 1047 Blindern, Oslo, 0316, Norway; Department of Earth Science, University of Bergen, Box 7803, Bergen, 5020, Norway; Lundin Energy Norway AS, Strandveien 4, Lysaker, 1366, Norway; Volcanic Basin Petroleum Research AS, Høienhald, Blindernveien 5, Oslo, 0361, Norway; Centre for Earth Evolution and Dynamics, University of Oslo, Box 1028 Blindern, Oslo, 0315, Norway
Recommended Citation:
Faleide T.S.,Braathen A.,Lecomte I.,et al. Impacts of seismic resolution on fault interpretation: Insights from seismic modelling[J]. Tectonophysics,2021-01-01,816