Surface acting agents commonly known as surfactants are chemicals which work at the interface of immiscible phases. In fracturing applications surfactants are generally used to interact between oil and water interfaces, which can be within the stimulation fluid or between the stimulation fluid and the formation and/or the formation fluids. Surfactants may function as surface tension reducers, interfacial tension reducers, wetting agents, cleanup agents and dispersing agents among other functions.
Surface Tension Reducers
Surface Tension Reducers are specially formulated surfactants that considerably reduce solution surface tension for various types of acids, as well as water-based fracturing fluids and brines. SunStimSTR-122L is a non-ionic surfactant, which allows exceptionally low surface tensions in comparison to many other types of surfactants currently available. The unique processing of this product has enabled the formulation of an extremely effective surfactant which, when used at low concentrations allows surface tension reductions.