Surfactant-free shale inhibitor for most water-based muds
ASPHASOL D shale inhibitor is a partially water‐soluble, sulfonated organic material for use in most water‐base drilling fluids. Unlike most water‐dispersible products used in shale‐control applications, ASPHASOL D shale inhibitor contains no surfactants.
Applications
ASPHASOL D shale inhibitor can be used in most water‐base drilling fluids. ASPHASOL D shale inhibitor is a free‐flowing powder and can be added directly to the mud system through the mixing hopper. Unlike some shale control additives, it is not necessary to pre‐mix the ASPHASOL D inhibitor with oil and it contains no surfactants.
Normal concentrations of ASPHASOL D shale inhibitor range from 2 to 10 lb/bbl (5.7 to 28.5 kg/m3) for most applications.
Advantages
- Contains no surfactants
- Premixing is not required
- Inhibits swelling and water‐wetting of shales
- Reduces High‐Temperature, High‐Pressure (HTHP) fluid loss
- Reduces torque and drag
- Improves wall cake quality
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