Evaluation of asphaltene-induced formation damage around the near wellbore region

Asphaltene are organic deposits which are originally in solution or colloidal suspension in the crude oil. Due to changes in the crude oil composition, temperature and pressure, asphaltene precipitates into distinctive solid phase, after which it flocculates and deposit on rock surfaces and pores. A...

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Main Author:	Elochukwu, Okafor Henry
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77853/1/ObajiNkemOkpaPFM2015.pdf
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spelling	my-utm-ep.778532018-07-04T11:46:18Z Evaluation of asphaltene-induced formation damage around the near wellbore region 2013-01 Elochukwu, Okafor Henry TP Chemical technology Asphaltene are organic deposits which are originally in solution or colloidal suspension in the crude oil. Due to changes in the crude oil composition, temperature and pressure, asphaltene precipitates into distinctive solid phase, after which it flocculates and deposit on rock surfaces and pores. Asphaltene deposition in the porous media causes damage to the formation. To evaluate formation damage due to asphaltene deposition, a computer program is developed to evaluate parametres such as permeability, porosity, skin factor and pressure within the damage region. Results from the evaluation indicates that asphaltene-induced formation damage is severe at the wellbore and less severe away from the wellbore. Analyzing the profiles generated from computer program for three scenarios; at the wellbore (0.29ft), near the wellbore (1ft) and away from the wellbore (10ft). Results indicate that the effect of asphaltene deposition is less severe as the radial distance approaches the radius of asphaltene flocculation. The effect of flow rate on the severity of formation damage is studied using the developed computer program. It is observed that for an increased flow rate (4000 bbl/day, 4200 bbl/day and 4500 bbl/day), asphaltene-induced formation damage is severe at the wellbore but at a reduced flow rate (3000 bbl/day and 2000 bbl/day), the severity of the damage is low thereby prolonging the production time prior to severe formation damage. 2013-01 Thesis http://eprints.utm.my/id/eprint/77853/ http://eprints.utm.my/id/eprint/77853/1/ObajiNkemOkpaPFM2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94044 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	TP Chemical technology
spellingShingle	TP Chemical technology Elochukwu, Okafor Henry Evaluation of asphaltene-induced formation damage around the near wellbore region
description	Asphaltene are organic deposits which are originally in solution or colloidal suspension in the crude oil. Due to changes in the crude oil composition, temperature and pressure, asphaltene precipitates into distinctive solid phase, after which it flocculates and deposit on rock surfaces and pores. Asphaltene deposition in the porous media causes damage to the formation. To evaluate formation damage due to asphaltene deposition, a computer program is developed to evaluate parametres such as permeability, porosity, skin factor and pressure within the damage region. Results from the evaluation indicates that asphaltene-induced formation damage is severe at the wellbore and less severe away from the wellbore. Analyzing the profiles generated from computer program for three scenarios; at the wellbore (0.29ft), near the wellbore (1ft) and away from the wellbore (10ft). Results indicate that the effect of asphaltene deposition is less severe as the radial distance approaches the radius of asphaltene flocculation. The effect of flow rate on the severity of formation damage is studied using the developed computer program. It is observed that for an increased flow rate (4000 bbl/day, 4200 bbl/day and 4500 bbl/day), asphaltene-induced formation damage is severe at the wellbore but at a reduced flow rate (3000 bbl/day and 2000 bbl/day), the severity of the damage is low thereby prolonging the production time prior to severe formation damage.
format	Thesis
qualification_level	Master's degree
author	Elochukwu, Okafor Henry
author_facet	Elochukwu, Okafor Henry
author_sort	Elochukwu, Okafor Henry
title	Evaluation of asphaltene-induced formation damage around the near wellbore region
title_short	Evaluation of asphaltene-induced formation damage around the near wellbore region
title_full	Evaluation of asphaltene-induced formation damage around the near wellbore region
title_fullStr	Evaluation of asphaltene-induced formation damage around the near wellbore region
title_full_unstemmed	Evaluation of asphaltene-induced formation damage around the near wellbore region
title_sort	evaluation of asphaltene-induced formation damage around the near wellbore region
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/77853/1/ObajiNkemOkpaPFM2015.pdf
_version_	1747817847077208064

Evaluation of asphaltene-induced formation damage around the near wellbore region

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