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Articles by Shuaib Ahmed Khalwar
Total Records ( 2 ) for Shuaib Ahmed Khalwar
  Ghulam Abbas , Sonny Irawan , Sandeep Kumar , Khalil Rehman Memon and Shuaib Ahmed Khalwar
  Polymers have been used in oil well cementing for improving the properties of cement slurry. Polysaccharides and their derivatives are mostly used as multifunctional additive in cement slurry. But these polymers present number of limitations at high temperature. Polysaccharides do not reveal an appropriate thickening of viscosity in cement slurry at high temperature which turn gives the fluid loss, gas migration and loss of economics. It is necessary to use such type of polymer in cement slurry that increases viscosity at high temperature. Therefore, this study present Hydroxypropylmethylcellulose (HPMC) polymer that is able to increase viscosity at high temperature and improve the properties of cement slurry. Laboratory experiments were performed to determine the characteristics of HPMC based cement slurry. The viscosity of 2 wt.% solution of HPMC polymer was determined at various temperatures. Further 0.20-0.50 gallon sack-1 concentration of HPMC polymer was used in cement slurry to evaluate the API properties of HPMC based cement slurry in term of rheology, free water, fluid loss, thickening time and compressive strength. It was observed that HPMC polymer was stable at high temperature and increases viscosity at elevated temperature. In cement slurries HPMC polymer resulted less than 50 mL of fluid loss; zero free water and predictable thickening time as well as enhanced final compressive strength with some other additives. The experimental result showed that HPMC has significantly improved the properties of cement slurry at high temperature.
  Shehzad-Ahmed , K.A. Elraies and Shuaib Ahmed Khalwar
  Microemulsion behavior is an important aspect in chemical EOR because these can be used as an indicator for ultra low interfacial tension. At optimal salinity, type III microemulsion begins to form by solubilizing equal volume of aqueous phase and oil phase in the middle phase. However, salinity lower or higher than optimal causes significant increase in the interfacial tension, resulting in insufficient displacement efficiency. In this study, the behavior of microemulsion is investigated experimentally. Type III microemulsion were generated at different salinities using surfactant, co-surfactant, alcohol and crude oil to form gel and liquid crystal free clear microemulsion. As a result, alcohol alkoxy sulfates has shown good performance in term of solubilization for light oil and low temperature conditions. Effect of varying surfactant, co-surfactant and co-solvent concentration on microemulsion parameter has been presented. This systematic approach helps in efficient formulation screening and optimization of chemical EOR formulation in order to achieve ultra low interfacial tension between the residual oil and injection water.
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