Wellbore fluids for use downhole
A wellbore fluid may include a base fluid, and a ground weight material comprising barite and quartz and having a d 50 between about 4 and 8 microns and a d 90 between about 15-25 microns. The ground weight material of the wellbore fluid may have a specific gravity of less than or equal to about 4.2.
1. A wellbore fluid comprising:
a base fluid; and
a barite-based ground weight material ground from barite ore such that the barite-based ground weight material comprises barite and quartz and has a d 50 between about 4-8 microns and a d 90 between about 15-25 microns, wherein the quartz has a larger average particle size than the barite and the barite-based ground weight material has a weight percent of quartz of about 4-12 percent.
2. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a specific gravity of less than or equal to about 4.2.
3. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a weight percent of quartz ranging between about 5-7 percent.
4. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 90 between about 18-22 microns.
5. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 50 between about 4-8 microns.
6. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 75 between about 12-14 microns.
7. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 85 between about 15-17 microns.
8. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 95 between about 24-34 microns.
9. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 98 between about 32-60 microns.
10. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 98 between about 32-60 microns.
11. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 99.5 between about 48-120 microns.
12. The wellbore fluid of claim 1 , wherein the base fluid is one selected from a water-based fluid, an invert emulsion and a direct emulsion.
13. The wellbore fluid of claim 1 , wherein the mixed wellbore fluid has a viscosity between about 12,000 and 20,000 cP at 0.17 s −1 and between about 1,500 and 2,500 cP at 1.7 s −1 .
14. The wellbore fluid of claim 1 , wherein the mixed wellbore fluid has a viscosity of at least 20 lbs/100 ft 2 between 30 and 100 rpm.
15. A wellbore fluid comprising:
a base fluid; and
a barite-based weight material ground from barite ore and comprising quartz,
wherein the weight material has a weight percent of quartz ranging between 4-12 percent,
wherein the wellbore fluid has a viscosity of at least 20 lbs/100 ft 2 between 30 and 100 rpm and a viscosity between about 12,000 and 20,000 cP at 0.17 s −1 and between about 1,500 and 2,500 cP at 1.7 s −1 , and
further wherein a particle size distribution of the barite-based weight material has a larger size range of particles comprising quartz particles.
16. The wellbore fluid of claim 15 , wherein the barite-based weight material is selected from the group consisting of barium sulphate (barite), calcium carbonate, dolomite, ilmenite, hematite, olivine, siderite, and strontium sulphate.
17. The wellbore fluid of claim 15 , wherein the barite-based weight material has a specific gravity of less than or equal to about 4.2.
18. The wellbore fluid of claim 15 , wherein the barite-based weight material has a d 50 between about 4-8 microns and a d 90 between about 15-25 microns.