Airfoam 511 is an ultra foaming, fresh water, air-drilling surfactant. It is also used to unload water from gas wells to increase gas production. Treating rates will vary depending on: (1) Water Characteristics , (2) Bottom hole pressure and gas flow rate, (3) tubing depth and size, and (4) hydrocarbon amounts. Airfoam 511 tolerates salt concentrations up to 12% as well as small amounts of oil contamination. Foaming agents represent a compromise in properties. For example, molecular structures which foam well in heavy brines by definition do not foam well in fresh water. Airfoam 511 is manufactured to provide ultimate fresh water performance. Airfoam 511 is safe to handle, and has a high flash point. Airfoam 511 does not require any hazardous shipping labels.
Foamers are often referred to as soap; however, the more appropriate name is surfactant, which is a shortened term meaning surface active agent. Surfactants work at the interfaces between air and water to lower the surface tension. By lowering the surface tension, the surfactant holds air bubbles in a ring of water, therefore lightening the water’s weight, and enabling the pressures to effectively move the column of brine. It takes a special type of surfactant to work in both brine, and in the presence of hydrocarbons. While most foamers can generally be described as an alcohol-ether-sulfate, Airfoam 511 is a blend of different, complex, linear, alcohol-ether-sulfates, and as such is highly biodegradable.
Airfoam 511 should be added to the water in the liquid injector tank downstream of the compressors and booster. Dosage rates are best determined from field tests. An optimum concentration for a specific field or water influx rate should be the goal.
Appearance: Clear, Yellow Liquid
Freeze point: -15°C (5°F)
Specific Gravity: 1.04-1.05
Density: 8.66-8.75 lbs/gal
pH (neat): 6.5-8.5
Charge in solution: slightly anionic
5 gallon plastic pails
55 gallon lined steel drums