The University of Southampton
University of Southampton Institutional Repository

Saturation effects on frequency-dependent seismic anisotropy in fractured porous rocks

Saturation effects on frequency-dependent seismic anisotropy in fractured porous rocks
Saturation effects on frequency-dependent seismic anisotropy in fractured porous rocks
The response of Earth materials to seismic wave propagation is the most commonly used geophysical method for studying the Earth’s crust. Rocks making up the Earth’s crust are porous, with fluids occupying the pore space. The saturation of the pore space can be multiphase, for example, in gas reservoirs and gas bearing oil reservoirs where gas and liquid occupy the pore space. Additional voids such as aligned fractures are common in the Earth’s crust and are known to cause seismic anisotropy. Knowledge of the effects of pore fluids and of aligned fractures on seismic wave propagation is needed for the interpretation of seismic data in terms of these physical properties. This information is particularly useful for the hydrocarbon industry as the presence of either natural or artificially induced fractures can play a major role in the safe and efficient exploration and production of hydrocarbons. Therefore, it is important to be able to remotely characterise fractures in fluid-filled reservoir rocks.

Theoretical models are used to relate seismic measurements to the physical properties of rocks such as porosity, saturation, and fracture properties. Previous studies have either focused on multiphase saturation effects in non-fractured isotropic rocks or on single fluid phase saturation effects in fractured anisotropic rocks. Therefore, the combined effect of multiphase saturation and aligned fractures is still poorly understood. This thesis focuses on improving the understanding of the effect of saturation on fracture-induced seismic anisotropy
University of Southampton
Amalokwu, Kelvin I.
a88bc1e5-5577-49a6-a503-fcd9ea12d8fe
Amalokwu, Kelvin I.
a88bc1e5-5577-49a6-a503-fcd9ea12d8fe
Best, Angus
fd094b23-2f48-41d3-a725-fb2bef223a8a

Amalokwu, Kelvin I. (2016) Saturation effects on frequency-dependent seismic anisotropy in fractured porous rocks. University of Southampton, Ocean & Earth Science, Doctoral Thesis, 168pp.

Record type: Thesis (Doctoral)

Abstract

The response of Earth materials to seismic wave propagation is the most commonly used geophysical method for studying the Earth’s crust. Rocks making up the Earth’s crust are porous, with fluids occupying the pore space. The saturation of the pore space can be multiphase, for example, in gas reservoirs and gas bearing oil reservoirs where gas and liquid occupy the pore space. Additional voids such as aligned fractures are common in the Earth’s crust and are known to cause seismic anisotropy. Knowledge of the effects of pore fluids and of aligned fractures on seismic wave propagation is needed for the interpretation of seismic data in terms of these physical properties. This information is particularly useful for the hydrocarbon industry as the presence of either natural or artificially induced fractures can play a major role in the safe and efficient exploration and production of hydrocarbons. Therefore, it is important to be able to remotely characterise fractures in fluid-filled reservoir rocks.

Theoretical models are used to relate seismic measurements to the physical properties of rocks such as porosity, saturation, and fracture properties. Previous studies have either focused on multiphase saturation effects in non-fractured isotropic rocks or on single fluid phase saturation effects in fractured anisotropic rocks. Therefore, the combined effect of multiphase saturation and aligned fractures is still poorly understood. This thesis focuses on improving the understanding of the effect of saturation on fracture-induced seismic anisotropy

PDF
K_Amalokwu_PhDthesis - PV__3 With correction - Version of Record
Available under License University of Southampton Thesis Licence.
Download (4MB)
PDF
Amalokwu, K_PhD_Mar_16.pdf Original submission - Other
Restricted to Repository staff only

More information

Published date: 14 March 2016
Organisations: University of Southampton, Geology & Geophysics

Identifiers

Local EPrints ID: 391107
URI: https://eprints.soton.ac.uk/id/eprint/391107
PURE UUID: b45310f8-81d2-43ac-ac07-62a1d76702fc

Catalogue record

Date deposited: 20 Apr 2016 14:03
Last modified: 17 Jul 2017 19:24

Export record

Contributors

Author: Kelvin I. Amalokwu
Thesis advisor: Angus Best

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×