A New Approach to Low-Cost, High Performance Chemical Flooding System

This paper presents a new Acid-Alkali-Surfactant (AAS) flooding formulation as an alternative to conventional alkaline/surfactant/polymer (ASP) process. It is a cost-effective formula that is able to overcome precipitation problems prevalent with ASP flooding when natural sea water was used. The aci...

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Main Authors: Elraies, K.A., Isa , M. Tan, Awang, M., Fathaddin, M.T.
Format: Article
Published: 2010
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Online Access:http://eprints.utp.edu.my/4264/1/SPE-133004-MS-P.pdf
http://eprints.utp.edu.my/4264/
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spelling my.utp.eprints.42642017-03-20T01:59:53Z A New Approach to Low-Cost, High Performance Chemical Flooding System Elraies, K.A. Isa , M. Tan Awang, M. Fathaddin, M.T. TP Chemical technology This paper presents a new Acid-Alkali-Surfactant (AAS) flooding formulation as an alternative to conventional alkaline/surfactant/polymer (ASP) process. It is a cost-effective formula that is able to overcome precipitation problems prevalent with ASP flooding when natural sea water was used. The acid was evaluated in an AAS formulation using sodium carbonate and introducing a new polymeric surfactant derived from Jatropha oil. The feasibility of applying the new AAS formula was demonstrated by a series of experiments involving fluid compatibility test with natural sea water having a large quantity of divalent metal cations, interfacial tension between Angsi crude oil and AAS solution, surfactant adsorption, and core flood using Berea core samples. The acid effectively prevented divalent metal cations from precipitating and all solutions remained clear for 90 days at 90oC. The optimum acid concentration was found to be proportional to alkali concentration in the ratio of 1.66:1. A combination of the new system was found to significantly reduce the IFT and the adsorption level of the surfactant. The best chemical concentrations were then validated in core flood tests using various alkali and surfactant concentrations. The optimum alkali and surfactant concentrations were confirmed as 0.6% and 0.6% respectively. Using the optimum concentrations, another series of core flood tests were conducted by changing the injection volume. Only a small incremental recovery was obtained with slugs higher than 0.5 PV. Injection of 0.5 PV of the formulated slug followed by chase water produced an additional 18.8% OOIP over water flood, accomplishing a total oil recovery of 77.3% OOIP. This makes the new AAS formula an attractive and cost-effective agent for CEOR particularly for offshore field application. 2010-06-08 Article PeerReviewed application/pdf http://eprints.utp.edu.my/4264/1/SPE-133004-MS-P.pdf Elraies, K.A. and Isa , M. Tan and Awang, M. and Fathaddin, M.T. (2010) A New Approach to Low-Cost, High Performance Chemical Flooding System. SPE (133004). http://eprints.utp.edu.my/4264/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Elraies, K.A.
Isa , M. Tan
Awang, M.
Fathaddin, M.T.
A New Approach to Low-Cost, High Performance Chemical Flooding System
description This paper presents a new Acid-Alkali-Surfactant (AAS) flooding formulation as an alternative to conventional alkaline/surfactant/polymer (ASP) process. It is a cost-effective formula that is able to overcome precipitation problems prevalent with ASP flooding when natural sea water was used. The acid was evaluated in an AAS formulation using sodium carbonate and introducing a new polymeric surfactant derived from Jatropha oil. The feasibility of applying the new AAS formula was demonstrated by a series of experiments involving fluid compatibility test with natural sea water having a large quantity of divalent metal cations, interfacial tension between Angsi crude oil and AAS solution, surfactant adsorption, and core flood using Berea core samples. The acid effectively prevented divalent metal cations from precipitating and all solutions remained clear for 90 days at 90oC. The optimum acid concentration was found to be proportional to alkali concentration in the ratio of 1.66:1. A combination of the new system was found to significantly reduce the IFT and the adsorption level of the surfactant. The best chemical concentrations were then validated in core flood tests using various alkali and surfactant concentrations. The optimum alkali and surfactant concentrations were confirmed as 0.6% and 0.6% respectively. Using the optimum concentrations, another series of core flood tests were conducted by changing the injection volume. Only a small incremental recovery was obtained with slugs higher than 0.5 PV. Injection of 0.5 PV of the formulated slug followed by chase water produced an additional 18.8% OOIP over water flood, accomplishing a total oil recovery of 77.3% OOIP. This makes the new AAS formula an attractive and cost-effective agent for CEOR particularly for offshore field application.
format Article
author Elraies, K.A.
Isa , M. Tan
Awang, M.
Fathaddin, M.T.
author_facet Elraies, K.A.
Isa , M. Tan
Awang, M.
Fathaddin, M.T.
author_sort Elraies, K.A.
title A New Approach to Low-Cost, High Performance Chemical Flooding System
title_short A New Approach to Low-Cost, High Performance Chemical Flooding System
title_full A New Approach to Low-Cost, High Performance Chemical Flooding System
title_fullStr A New Approach to Low-Cost, High Performance Chemical Flooding System
title_full_unstemmed A New Approach to Low-Cost, High Performance Chemical Flooding System
title_sort new approach to low-cost, high performance chemical flooding system
publishDate 2010
url http://eprints.utp.edu.my/4264/1/SPE-133004-MS-P.pdf
http://eprints.utp.edu.my/4264/
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