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Articles by Shuaib Ahmed Kalwar
Total Records ( 2 ) for Shuaib Ahmed Kalwar
  S. Kumar , Mariyamni Bt. Awang , Ghulam Abbas and Shuaib Ahmed Kalwar
  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.
  Shuaib Ahmed Kalwar , Khaled Abdalla Elraies and Shehzad Ahmed
  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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