An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field

Instability in wellbore wall is one of the most serious difficulties in drilling, because this problem can ultimately delay the drilling operations, increase cost of drilling and in some cases lead to the wellbore becoming abandoned. Now a day, with consideration of physical and chemical characteris...

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Main Author:	Ghaderi, Majid
Format:	Thesis
Language:	English
Published:	2013
Subjects:	QA76 Computer software TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/81095/1/MajidGhaderiMFPREE2013.pdf
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spelling	my-utm-ep.810952019-07-24T03:09:38Z An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field 2013-06 Ghaderi, Majid QA76 Computer software TP Chemical technology Instability in wellbore wall is one of the most serious difficulties in drilling, because this problem can ultimately delay the drilling operations, increase cost of drilling and in some cases lead to the wellbore becoming abandoned. Now a day, with consideration of physical and chemical characteristics of mud we can apply the necessary changes to the composition of mud and make the wellbore wall more stable. With the help of the science of rock mechanics and the full knowledge of the characteristics of formation, the optimum path to drilling wellbore and the mud window can be calculated. In this research, first stability of the shale layer in wellbore 2SK5 in Salman oil field using analytical method (MATLAB software) and numerical method (FALC3D software) with the use of three criteria of failure of Mohr Coulomb, Mogi Coulomb and Drucker Prager will be studied and at the same time comparisons of applications of above criteria in stability of wellbore and comparisons of occurred difficulties in drilling this wellbore will be studied, and recommendations concerning drilling wellbore in the mentioned oil field will be presented, also at the same time some research work will be carried out in assessing drilling deviational wellbores in oil fields and effect of different stress regimes for calculating optimum direction and angle of deviation. Therefore, we conclude that stability of the wellbore with the increase in angle of deviation of wellbore does not necessarily decrease from that of its right angled one (90 degrees) , unless in a case when stress is normal or the principal horizontal stresses are equal. Also, when stress regime is normal, drilling in the direction of minimum horizontal stress and decrease in angle of deviation of the wellbore from that of right angled one will be most stabilizing for the wellbore, but drilling in this direction in the other two stress regimes will result maximum instability. 2013-06 Thesis http://eprints.utm.my/id/eprint/81095/ http://eprints.utm.my/id/eprint/81095/1/MajidGhaderiMFPREE2013.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:119075 masters Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering Faculty of Petroleum and Renewable Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QA76 Computer software TP Chemical technology
spellingShingle	QA76 Computer software TP Chemical technology Ghaderi, Majid An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field
description	Instability in wellbore wall is one of the most serious difficulties in drilling, because this problem can ultimately delay the drilling operations, increase cost of drilling and in some cases lead to the wellbore becoming abandoned. Now a day, with consideration of physical and chemical characteristics of mud we can apply the necessary changes to the composition of mud and make the wellbore wall more stable. With the help of the science of rock mechanics and the full knowledge of the characteristics of formation, the optimum path to drilling wellbore and the mud window can be calculated. In this research, first stability of the shale layer in wellbore 2SK5 in Salman oil field using analytical method (MATLAB software) and numerical method (FALC3D software) with the use of three criteria of failure of Mohr Coulomb, Mogi Coulomb and Drucker Prager will be studied and at the same time comparisons of applications of above criteria in stability of wellbore and comparisons of occurred difficulties in drilling this wellbore will be studied, and recommendations concerning drilling wellbore in the mentioned oil field will be presented, also at the same time some research work will be carried out in assessing drilling deviational wellbores in oil fields and effect of different stress regimes for calculating optimum direction and angle of deviation. Therefore, we conclude that stability of the wellbore with the increase in angle of deviation of wellbore does not necessarily decrease from that of its right angled one (90 degrees) , unless in a case when stress is normal or the principal horizontal stresses are equal. Also, when stress regime is normal, drilling in the direction of minimum horizontal stress and decrease in angle of deviation of the wellbore from that of right angled one will be most stabilizing for the wellbore, but drilling in this direction in the other two stress regimes will result maximum instability.
format	Thesis
qualification_level	Master's degree
author	Ghaderi, Majid
author_facet	Ghaderi, Majid
author_sort	Ghaderi, Majid
title	An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field
title_short	An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field
title_full	An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field
title_fullStr	An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field
title_full_unstemmed	An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field
title_sort	approach to well bore wall stability analysis by matlab and flac3d software for salman oil field
granting_institution	Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering
granting_department	Faculty of Petroleum and Renewable Energy Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/81095/1/MajidGhaderiMFPREE2013.pdf
_version_	1747818305696038912

An approach to well bore wall stability analysis by MATLAB and FLAC3D software for Salman oil field

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