Gilsonite Asphasol
Gilsonite Asphasol
Asphasol is trade mark of Schlumberger to supply sulfonated asphalt
Gilsonite Asphasol shale inhibitor is a partially water-soluble, sulfonated organic material developed for use in most water-based drilling fluids. Asphasol shale inhibitor contains no surfactants as do most water-dispersible products used in shale-control applications.
Typical Physical Properties
Physical appearance: Black, free-flowing powder
ph (2% solution): 7.5 – 9.5
Solubility in water: Minimum 50% by weight
- preventing below problem during drilling.
- Blowout of fluid under high pressure.
- Lost circulation.
- Massive shale instability.
- Chemical reason-ductitle unfractured shales, incompatibility with oil base mud.
- Stress reason-high compressive stress fields.
- The main reason to use Asphasol is to reduce of lost during of well.
Gilsonite Asphasol is available in 25 Kg bag and super sax ready for shipment from stock.
Asphasol application
Gilsonite Asphasol shale inhibitor can be used in most water-based drilling fluids. Asphasol 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 inhibitor with oil and it contains no surfactants.
Normal concentrations of Asphasol shale inhibitor range from 2 to 10 lb/bbl (5.7 to 28.5 kg/m3) for most applications.
Advantages of Asphasol
- 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
