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| Articles
by
Shuaib Ahmed Kalwar |
Total Records (
2 ) for
Shuaib Ahmed Kalwar |
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S. Kumar
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Mariyamni Bt. Awang
,
Ghulam Abbas
and
Shuaib Ahmed Kalwar
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In Alkaline-Surfactant-Polymer (ASP) flooding, mobility control
is one of the important factors for improving tertiary oil recovery. It is achieved
by using polymeric mobility control agent such as partial hydrolyzed polyacrylamide
(HPAM). However, polymer is highly degradable when subjected to high temperature;
high salinity and high shear rates. These limitations of polymer adversely restrict
the extension of ASP in such reservoirs conditions. In order to overcome these
limitations, Wormlike Micellar (WLM) solution can be studied as a potential
alternative. This study presents a review on application of WLM solution as
mobility control agent for chemical EOR. It discusses the current limitations
with existing polymers, comparison between WLM and polymerr. |
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Shuaib Ahmed Kalwar
,
Khaled Abdalla Elraies
and
Shehzad Ahmed
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In chemical EOR, interfacial tension plays one of the important
roles in carbonate reservoirs. Carbonate reservoirs are composed of calcium
and magnesium minerals which affect the performance of alkali and surfactants
to reduce interfacial tension. In this study, acrylic acid was used to inhibit
precipitation and to create a compatible solution without any precipitations.
The impact of acrylic acid on interfacial tension was investigated using various
inhibitor concentrations with a hard brine composition of 59, 940 TDS. Sodium
metaborate, alpha olefin sulfonate and internal olefin sulfonate were screened
as promising chemicals for interfacial tension. Various fluid-fluid compatibility
tests were first performed to find the optimum acid-alkali ratio to prevent
any precipitations. The optimum acid-alkali ratio was found to be 0.6:1.0. This
ratio was then used to keep all solution without any precipitations for 30 days
at 80°C. It was also observed that the increase in acid-alkali concentrations
can significantly reduce the interfacial tension. Using the optimum concentration
for acid, alkali and surfactant, the interfacial tension reduced from 14.9-0.401
mN m-1. |
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