Modeling and detection of oil in sea water

Angeliki Xenaki, Peter Gerstoft, Klaus Mosegaard

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The challenge of a deep-water oil leak is that a significant quantity of oil remains in the water column and possibly changes properties. There is a need to quantify the oil settled within the water column and determine its physical properties to assist in the oil recovery. There are currently no methods to map acoustically submerged oil in the sea. In this paper, high-frequency acoustic methods are proposed to localize the oil polluted area and characterize the parameters of its spatial covariance, i.e., variance and correlation. A model is implemented to study the underlying mechanisms of backscattering due to spatial heterogeneity of the medium and predict backscattering returns. An algorithm for synthetically generating stationary, Gaussian random fields is introduced which provides great flexibility in implementing the physical model of an inhomogeneous field with spatial covariance. A method for inference of spatial covariance parameters is proposed to describe the scattering field in terms of its second-order statistics from the backscattered returns. The results indicate that high-frequency acoustic methods not only are suitable for large-scale detection of oil contamination in the water column but also allow inference of the spatial covariance parameters resulting in a statistical description of the oil field.
Original languageEnglish
JournalJournal of the Acoustical Society of America
Volume134
Issue number4
Pages (from-to)2790-2798
Number of pages9
ISSN0001-4966
DOIs
Publication statusPublished - 2013

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