Wetting surfactant for VERSA systems
SWA EH wetting agent is a specialized surfactant to preferentially oil‐wet solids in the VERSA oil‐base systems. SWA EH additive complements the system’s normal wetting agents to assist in preventing water‐wetting of solids. In certain situations, SWA EH additive has the ability to reverse water-wetting of solids that might occur. SWA EH wetting agent is a powerful additive, and provides superior performance when needed.
Applications
SWA EH wetting agent can be added to reverse a water‐wet solids problem, allowing the surface area of the solids to return to an oil‐wet environment. SWA EH will prevent water wetting of all weight material, including FER‐OX.
SWA EH wetting agent may be added to a drilling fluid as a pretreatment before displacement or cementing jobs are initiated to eliminate any occurrence of water‐wetting or used to condition a fluid that has encountered a water‐wet problem. Generally, pretreatment concentrations of 1 lb/bbl (2.8 kg/m3) are suggested, but if a large amount of open hole is exposed, larger treatments should be considered. Those should be limited to no more than 2 lb/bbl (5.6 kg/m3).
Recommended treatment levels for water‐wet solids contamination, such as water flows, and CO2 intrusions, are from 1 to 2 lb/bbl (2.8 to 5.7 kg/m3). Begin treatment as soon as wetting characteristics are observed (graininess, barite settling or flocculation, etc.).
SWA EH wetting agent will assist in preventing sag from water‐wet weight material.
Advantages
- Prevents water‐wet solids
- Reverses water‐wetting of solids
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