Adding Gilsonite during cementing operations enhances the characteristics that are critical to effectively cementing the casing, isolating hydrocarbon formations and preventing annular gas flow.
With its unique physical and chemical properties, Gilsonite provides a range of important benefits in slurry and set cement that are unmatched by any other single additive.
Cement slurry benefits
Reduces slurry weight
Controls free water
Lowers slurry water ratio
Promotes favorable rheologies resulting in lower ECDs
Prevents lost circulation
Scours wellbore/enhances mud removal
Set cement benefits
Maintains compressive strength, unlike coal or fly ash
Strengthens bond to the formation and the casing
Reduces environmental risk
Assures zonal isolation
Gilsonite eliminates the problems of free water
By controlling free water, Gilsonite helps stabilize slurry and eliminates the need for – and cost of – additional free-water-control agents. As a lost circulation material, it also improves zonal isolation by preventing water channeling on the upper side of the wellbore.
Self-healing properties help maintain zonal isolation
Gilsonite is flexible, deformable, swellable, impermeable and non-porous. These characteristics give Gilsonite self-healing properties that can plug induced microfissures in the cement sheath.