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| Articles
by
Shuaib Ahmed Khalwar |
Total Records (
2 ) for
Shuaib Ahmed Khalwar |
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Ghulam Abbas
,
Sonny Irawan
,
Sandeep Kumar
,
Khalil Rehman Memon
and
Shuaib Ahmed Khalwar
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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. |
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Shehzad-Ahmed
,
K.A. Elraies
and
Shuaib Ahmed Khalwar
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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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