Use of granite waste powder in lightweight oilwell cement systems; strength analysis

A method for treating a well in a hydrocarbon-producing subterranean production zone, comprising:

• dry mixing granite waste powder (GWP) and cement to form a mixture;
• wherein the GWP has a D50 diameter of from 10 μm to 100 μm;
• and
• mixing the mixture with an aqueous composition containing water, pre-hydrated sodium bentonite, calcium chloride, a dispersant, and an alcohol-based defoamer to form a cement slurry;
• wherein the cement slurry has a density of from 13.5 pounds per gallon (ppg) to 14.5 ppg and contains the GWP in a range of from 5 wt. % to 20 wt. % of the cement slurry;
• and
• adding 10 wt. % to 15 wt. % of perlite into the cement slurry to form a ternary blend;
• injecting the ternary blend into the well at the hydrocarbon-producing subterranean production zone;
• curing the ternary blend to seal a wall of the well at the hydrocarbon-producing subterranean production zone;
• and
• wherein the cured ternary blend has a compressive strength of from 30,000 pounds per square inch (psi) to 50,000 psi at an effective pressure of 15,000 psi in the well.