.... The most popular technologies as of today are either based on water soluble polymers or colloidal particles like latexes. As an alternative approach, in this paper we introduce a new technology based on associative or "sticky" microgels. These microgels are able to associate with one another at elevated...

... used for brine flooding and 1.0 wt. % NaCl for preparing swollen PPG. Two microgel concentrations, 2000 PPM and 5000 PPM, with 850 micrometer particle size were used. Three cycles of low-salinity water were injected after the second conventional brine injection was completed. Oil recovery factor, water...

... Abstract SMG Microgels are pre-gelled polymers having a narrow size distribution and behaving like large polymer molecules. Their stability is strongly enhanced by internal cross-links. Several SMG microgels having different chemical compositions and cross-link density, with a size of around 2...

... and propagation of microgel through fractures and develop conformance control schemes using a reservoir simulator to help in screening oil reservoir targets for effective particle gel applications to improve sweep efficiency and reduce the water production. Fractured experiments using transparent apparatus were...

... Abstract SMG Microgels are pre-gelled polymers having a narrow size distribution and behaving like large polymer molecules whose stability is strongly enhanced by internal crosslinks. The largest species have a size of around 2 μm, which makes them suitable for Water Shutoff and Conformance...

... well abandonment. The primary objectives of this work are to conduct laboratory work to understand the transport and propagation of microgel and develop conformance control reservoir simulator to help in screening oil reservoir targets for effective particle gel applications to improve sweep...

... Abstract Interactions between a chemically cross-linked poly( N -isopropylacrylamide) (PNIPAAM) microgel and the anionic surfactant sodium dodecyl sulfate (SDS) have been investigated by dynamic light scattering (DLS) and turbidimetry in both a buffer system (pH = 7) with an ionic strength...

... conformance improvement adsorption adsorbed layer thickness enhanced recovery Fluid Dynamics Thickness experiment microgel solution Upstream Oil & Gas concentration viscosity adsorbed layer microgel injection shear rate injection Permeability reduction mobility reduction...

...Laboratory study Experimental conditions Microgel solutions Due to the presence of high-permeability zones surrounding the wellbore and to mild reservoir conditions, a "soft" large microgel quality was chosen for the application. The commercial product was under inverse emulsion form...

... Abstract The performances of new microgels specifically designed for water shutoff and conformance control were extensively investigated at laboratory scale. These microgels are preformed, stable, fully water soluble, size controlled with a narrow size distribution, and non-toxic. They reduce...

... Abstract Injecting soft, stable and size-controlled microgels to reduce water production is a new concept, introduced some years ago, we refer to as STARPOL process. Microgels specifically designed for water shutoff (WSO) treatments do not contain toxic products and can be produced to be fully...

... To minimize these risks inherent to all well treatments based on in-situ gelling, we proposed to use soft, size-controlled "microgels" formed and stabilized before injection ( 3 - 6 ). Such microgels can be prepared on-site in a unit specifically designed to control precisely both shear rate...

... Abstract Two microgel samples were prepared by crosslinking an acrylamide-based terpolymer solution with a non-toxic zirconium crosslinker under controlled shear flow. The characteristics of these two microgel samples were determined by using different laboratory techniques in order to evaluate...

... angle of 90° and at a temperature kept at 20°C. Abstract New size-controlled microgels formed by crosslinking polymers under shear flow are very promizing for various applications in oil production. Indeed, when produced by using a proper polymer/crosslinker system and under the conditions needed...