Attenuation of seismic water-column noise, tested on seismic data from the Grane field

Author:

Landrø M.1

Affiliation:

1. Norwegian University of Science and Technology, Department of Petroleum Engineering and Applied Geophysics, Trondheim, Norway.

Abstract

Seismic analysis of long-offset data is gaining increased attention for several purposes: constraining three-parameter amplitude variation with offset (AVO) methods, 4D analysis, and imaging below salt and basalt. A major challenge for exploiting long-offset seismic data is that the water-column noise mixes with and distorts the reflected seismic signal from interfaces at the target level. Traditional processing methods such as [Formula: see text] filtering often reduce this distortion problem. This article offers an alternative to conventional processing methods. The alternative exploits the difference in water depth and reservoir depth to subtract water-column noise. The proposed subtraction method works well where water depth is constant. The method was tested on a multicomponent seismic data set from the Grane field (North Sea). In this location, the water depth is fairly constant over the field. The fieldwise similarity level of water-column noise is high. A comparison of the water-column noise from various locations shows that the similarity is 10%, measured in normalized root mean squared error. The fact that the water-column noise is highly repeatable is a strong indication that the major part of it is harmonic waves that propagate in the water layer.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Time lapse (4D) and AVO analysis: A case study of Gullfaks field, Northern North Sea;NRIAG Journal of Astronomy and Geophysics;2018-06

2. Optimal towing depth for marine seismic data minimizing the noise from normal modes;SEG Technical Program Expanded Abstracts 2016;2016-09-01

3. Acquisition Complete Session;SEG Technical Program Expanded Abstracts 2016;2016-09-01

4. Technical Program in full - Part I (ACQ 1 - PS P1);SEG Technical Program Expanded Abstracts 2016;2016-09

5. Normal modes in seismic data — Revisited;GEOPHYSICS;2012-07-01

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