Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs

Wireline formation testing and measurement of true formation pressure can provide essential knowledge about the reservoir dynamic characteristics. In tight formations, a reliable determination of pressure and mobility gradients is challenging because of the tight nature of formation rock. Due to the...

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Main Authors:	Andrews, J., Bahrami, Hassan, Rezaee, Reza, Porabed, H., Mehmood, S., Salemi, H.
Format:	Journal Article
Published:	Australian Petroleum Production and Exploration Association 2012
Subjects:	pressure gradient formation testing formation pressure capillary pressure Tight gas reservoir
Online Access:	http://hdl.handle.net/20.500.11937/32562

id	curtin-20.500.11937-32562
recordtype	eprints
spelling	curtin-20.500.11937-325622017-01-30T13:31:40Z Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs Andrews, J. Bahrami, Hassan Rezaee, Reza Porabed, H. Mehmood, S. Salemi, H. pressure gradient formation testing formation pressure capillary pressure Tight gas reservoir Wireline formation testing and measurement of true formation pressure can provide essential knowledge about the reservoir dynamic characteristics. In tight formations, a reliable determination of pressure and mobility gradients is challenging because of the tight nature of formation rock. Due to the very low reservoir permeability, the mud cake across wellbore is often ineffective in preventing filtrate invasion, thus causing the measured pressure to be higher than actual formation pressure as a result of supercharging effect. Wireline formation testing measurements are also influenced by the effects of filtrate invasion and capillary pressure, as the measured pressure is pressure of drilling fluid filtrate, the continuous phase present in the invaded region around wellbore. As a result, the measured pressure might be different to true formation pressure. This effect is more noticeable in tight gas reservoirs due to capillary pressure effect. This paper looks into estimation of true formation pressure and evaluates the effect of filtrate invasion damage and supercharging on wireline formation tester measurements in tight gas reservoirs. Numerical simulation approach is used to build the reservoir model based on data acquired from a tight gas reservoir. The model undergoes water injection followed by gas production from different testing points along the wellbore, and the corresponding pressure gradients are plotted to check for pressure matching with that of the formation fluid in the virgin region. The results indicate the significant effects of supercharging, reservoir characteristics, capillary pressure and liquid invasion damage on wireline formation pressure measurements in tight gas reservoirs. 2012 Journal Article http://hdl.handle.net/20.500.11937/32562 Australian Petroleum Production and Exploration Association restricted
repository_type	Digital Repository
institution_category	Local University
institution	Curtin University Malaysia
building	Curtin Institutional Repository
collection	Online Access
topic	pressure gradient formation testing formation pressure capillary pressure Tight gas reservoir
spellingShingle	pressure gradient formation testing formation pressure capillary pressure Tight gas reservoir Andrews, J. Bahrami, Hassan Rezaee, Reza Porabed, H. Mehmood, S. Salemi, H. Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs
description	Wireline formation testing and measurement of true formation pressure can provide essential knowledge about the reservoir dynamic characteristics. In tight formations, a reliable determination of pressure and mobility gradients is challenging because of the tight nature of formation rock. Due to the very low reservoir permeability, the mud cake across wellbore is often ineffective in preventing filtrate invasion, thus causing the measured pressure to be higher than actual formation pressure as a result of supercharging effect. Wireline formation testing measurements are also influenced by the effects of filtrate invasion and capillary pressure, as the measured pressure is pressure of drilling fluid filtrate, the continuous phase present in the invaded region around wellbore. As a result, the measured pressure might be different to true formation pressure. This effect is more noticeable in tight gas reservoirs due to capillary pressure effect. This paper looks into estimation of true formation pressure and evaluates the effect of filtrate invasion damage and supercharging on wireline formation tester measurements in tight gas reservoirs. Numerical simulation approach is used to build the reservoir model based on data acquired from a tight gas reservoir. The model undergoes water injection followed by gas production from different testing points along the wellbore, and the corresponding pressure gradients are plotted to check for pressure matching with that of the formation fluid in the virgin region. The results indicate the significant effects of supercharging, reservoir characteristics, capillary pressure and liquid invasion damage on wireline formation pressure measurements in tight gas reservoirs.
format	Journal Article
author	Andrews, J. Bahrami, Hassan Rezaee, Reza Porabed, H. Mehmood, S. Salemi, H.
author_facet	Andrews, J. Bahrami, Hassan Rezaee, Reza Porabed, H. Mehmood, S. Salemi, H.
author_sort	Andrews, J.
title	Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs
title_short	Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs
title_full	Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs
title_fullStr	Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs
title_full_unstemmed	Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs
title_sort	effect of liquid invasion damage and supercharging on wireline formation tester measurements in tight gas reservoirs
publisher	Australian Petroleum Production and Exploration Association
publishDate	2012
url	http://hdl.handle.net/20.500.11937/32562
first_indexed	2018-09-06T21:55:06Z
last_indexed	2018-09-06T21:55:06Z
_version_	1610896802076164096

Effect of Liquid Invasion Damage and Supercharging on Wireline Formation Tester Measurements in Tight Gas Reservoirs

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