When viscoelastic fluids systems first appeared, they provided a very good non-damaging no polymer option for many tight gas applications. These fluids were operationally simplistic with only a few additives, usually less than five. However, they are temperature limited to about 140°F as a single fluid. For temperatures to about 220°F you have to foam with gas (carbon dioxide (CO2) or nitrogen (N2), usually 65 to 75 quality (Q) in order to achieve stability with adequate viscosity. In addition the typical VES systems do not have very good friction reduction because at high shear they tend to behave more like water.

The new thermo thickening system raises the temperature limit for traditional VES fluids. Rheology testing exhibits good structure along with viscosity. The time necessary to gel with temperature can be accelerated and delayed chemically. Although it does contain a polymer, regain conductivity tests show very high numbers usually associated with VES fluids. The system also exhibits unique traits of clay control, surfactant properties and fluid loss. The system also has the potential to extend further as a foamed fluid. This project will show laboratory testing results and a field test case history of this new and unique fluid system.

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