| 摘要 |
An aqueous gel comprising water and by weight based on the water, 0.1-5% of an anionic polymer, such as 2-acrylamido-2-methylpropane sulphonic acid (AMPSA) or a cationic polymer, such as dimethyl diallyl ammonium chloride, at least 0.01% of a surfactant having 8-22 carbon atoms and a charge opposite that of the polymer, 0.001-5% of a hydrophobic alcohol, such as lauryl alcohol, an effective amount of a phosphorous-containing compound, such as tri-n-butyl phosphate, sufficient to increase the viscosity of the gel, up to 5% of an amphoteric surfactant, such as cocamidopropyl betaine, and up to 5% of an amine oxide, such as laury amine oxide, where the aqueous gel has a Zeta Potential of at least 20 millivolts. Also disclosed is a method of making the aqueous gel, a method of separating two portions of fluid for movement in a pipe comprising use of the aqueous gel. Further disclosed is an aqueous gel comprising a water-soluble polymer in an amount no greater than 1% by weight, having at least one of a zero shear viscosity of at least 45,000 following the zero shear viscosity procedure of Asadi, Conway and Barree in SPE 73755 or a "10/100/20/40" settling rate result at 60 minutes of no more than 8 millimetres. |
