Gilsonite Asphasol
Gilsonite in 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.
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.
Application of Gilsonite Asphasol
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.
