Comparison of Xanthan and HPAM Solution Rheology in Berea Sandstone
Rheology in porous media has an important impact on enhanced oil recovery (EOR) projects where polymer solutions are used.

X-Ray Computed Microtomography: Accurate Liquid Volume Metering
Aqueous gels have often been used to reduce excess salt water production from oil and gas wells.

Reactive spray deposition technology (RSDT) is a method of depositing films or producing nanopowders through combustion of metal-organic or metal-inorganic compounds dissolved in a solvent.

The sequence followed during our core experiments is listed in Table 1. First, at ambient conditions, the cores were saturated with brine and porosities were determined (Step 1 of the sequence on the following page).

Pulseless Flow — This is a critical feature for rock core flooding studies where pressure changes are monitored and logged. It is important for the pump employed to not introduce any pressure variations itself (as with a piston pump).

Reciprocating pumps are usually available with single or dual pistons. Piston swept volumes are typically small, around 100μL. Small volumes require frequent refills, creating periodic pressure drops.

Teledyne Isco syringe pumps are well suited for use with CO₂ and provide the best in accuracy and reli- ability. Flow rate accuracy is +/- 0.5 % or better, and flows are pulseless.

Ultra-HPLC uses the same separation methodology as conventional HPLC, but typically uses columns packed with particles smaller than 2μm.

If the fluid is considered corrosive or potentially damaging to the pump, an accumulator or transfer cyl- inder is sometimes used. An accumulator has a bladder.