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Development of EM simulator for sea bed logging applications using MATLAB

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Title Development of EM simulator for sea bed logging applications using MATLAB
 
Creator Daud, Hanita
Yahya, Noorhana
Asirvadam, Vijanth
 
Subject Forward modeling
Direct waves
Guided Waves
Reflected waves
Sea bed logging
Acoustic
Map
 
Description 267-274
Present study is a 1D modeling of electromagnetic waves
for sea bed environment, developed using MATLAB software. It focuses on two
main areas; the first is on the simulator that is able to model plane layer
modeling of the sea bed environment, by setting the deep of sea water,
sediments and size and location of the hydrocarbon trap. This model shall be
used as a forward modeling of sea bed environment. The second focus is on the
effect of electromagnetic waves called direct waves, reflected waves and
refracted waves on the sea bed environment where potential hydrocarbon is
present. Present work is based on Sea Bed Logging (SBL) application that uses
marine controlled source electromagnetic (CSEM) sounding technique to detect
and characterize hydrocarbon bearing reservoirs in deep water areas. SBL uses a
mobile horizontal electric dipole (HED) source called transmitter and an array
of seafloor electric field receivers. Transmitter transmits a low frequency electromagnetic
signal from 30m-40m above the sea bed into water layer and to underneath the
sea bed. Array of the receivers will receive the signal in the form of direct
waves, air waves, reflected waves and refracted waves and is measured in the
form of amplitude and phase. These signals depend on the resistivity structure
beneath the sea bed. Hydrocarbon is known to have high resistivity value of 30–500
Ωm in contrast to sea water layer of 0.5-2 Ωm and sediments of 1-2 Ω m. These
signals were plotted to show the Electric Field amplitude versus offset (AVO)
and comparisons were made.
 
Date 2011-05-23T11:33:05Z
2011-05-23T11:33:05Z
2011-04
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/11732
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(2) [April 2011]