Methods for determining reactive index for cement kiln dust, associated compositions, and methods of use
A variety of methods and compositions are disclosed, including, in one embodiment, a method of treating a well comprising: providing a treatment fluid comprising a base fluid and a blended cementitious component, wherein the blended cementitious component comprises kiln dust from two or more different sources; and introducing the treatment fluid into a well bore.
1. A method of treating a well comprising:
providing a treatment fluid comprising a base fluid and a blended cementitious component, wherein the blended cementitious component comprises kiln dust from two or more different sources; and
introducing the treatment fluid into a well bore, wherein the kiln dust comprises a first kiln dust from a first source and a second kiln dust from a second source, and wherein the first kiln dust and the second kiln dust have different reactive indexes.
2. The method of claim 1 wherein the base fluid comprises water selected from the group consisting of freshwater, saltwater, brine, and any combination thereof.
3. The method, of claim 1 wherein the kiln dust is selected from the group consisting of lime kiln, dust, cement kiln dust, and a combination thereof.
4. The method of claim 1 wherein the kiln dust comprises cement kiln dust, the cement kiln, dust being present in the treatment fluid in an amount in a range of from about 0.01% to 100% by weight of by weight of the blended cementitious component.
5. The method of claim 1 wherein the treatment fluid is essentially free of any additional cementitious components other than the blended cementitious component.
6. The method of claim 1 wherein the treatment fluid is used in the well bore in well drilling.
7. The method of claim 1 wherein the treatment fluid is used in the well bore in well completion.
8. The method of claim 1 wherein the treatment fluid is used in the well bore in well stimulation.
9. The method of claim 1 wherein the amount of kiln dust from each of the two sources in the blended cementitious component is adjusted based on a parameter selected from the group consisting of compressive strength, Young's modulus, fluid loss, thickening time, a rheological value, free water, and any combination thereof.
10. The method of claim 1 wherein the method further comprises further comprises determining a reactive index for the first kiln dust and determining a reactive index for the second kiln dust.
11. The method of claim 10 :
wherein the step of determining the reactive index for the first kiln dust uses the following equation:
RI 1 =MP 1 /SSA 1
wherein RI 1 is the reactive index for the first kiln dust, MP 1 is a measured parameter of the first kiln dust, and SSA 1 is the specific surface area of the first kiln dust; and
wherein the step of determining the reactive index for the second kiln dust uses the following equation:
RI 2 =MP 2 /SSA 2
wherein RI 2 is the reactive index for the second kiln dust, MP 2 is a measured parameter of the second kiln dust, and SSA 2 is the specific surface area of the second kiln dust.
12. The method of claim 11 wherein the measured parameter is compressive strength, Young's modulus, fluid loss, thickening time, a rheological value, free water, or any combination thereof.
13. The method of claim 12 wherein performance of the blended cementitious component is optimized using the following equation:
EP blend =(RI 1 )(SSA 1 )( f 1 ) m +(RI 2 )(SSA 2 )( f 2 ) m
wherein EP is an estimated parameter for the blended cementitious component, f 1 is mass fraction of first kiln dust, f 2 is mass fraction of the second kiln dust, and m is a number from 1 to 10, and wherein the optimizing comprises adjusting f 1 and/or f 2 .
14. A method of cementing comprising:
providing a settable composition comprising water and a blended cementitious component wherein the blended cementitious component comprises kiln dust from two or more different sources; and
placing the settable composition into a subterranean formation penetrated by a well bore; and
allowing the sellable composition to set to form a hardened mass, wherein the kiln dust comprises a first kiln dust from a first source and a second kiln dust from a second source, wherein the first kiln dust and the second kiln dust have different reactive indexes.
15. The method of claim 14 wherein the kiln dust is selected from the group consisting of lime kiln dust, cement kiln dust, and a combination thereof.
16. The method of claim 14 wherein the kiln dust comprises cement kiln dust, the cement kiln dust being present in the settable composition in an amount in a range of from about 0.01% to 100% by weight of by weight of the blended cementitious component.
17. The method of claim 14 wherein the settable composition is essentially free of any additional cementitious components other than the blended cementitious component.
18. The method of claim 14 wherein the amount of kiln dust from each of the two sources in the blended cementitious component is adjusted based on a parameter selected from the group consisting of compressive strength, Young's modulus, fluid loss, thickening time, a rheological value, free water, and any combination thereof.
19. The method of claim 14 wherein the amount of kiln dust from each of the two sources in the blended cementitious component is adjusted to adjust compressive strength of the settable composition.
20. The method of claim 14 further comprising adjusting particle size of the first kiln dust and/or the second kiln dust to adjust compressive strength of the settable composition.
21. The method of claim 14 wherein particle size of the first kiln dust and/or the second kiln dust has been reduced by way of grinding to adjust compressive strength of the sellable composition.
22. The method of claim 14 wherein a reactive index for the first kiln dust and a reactive index for the second kiln dust vary by a factor of at least about 2:1.
23. The method of claim 14 wherein a reactive index for the first kiln dust and a reactive index for the second kiln dust vary by a factor of at least about 100:1.
24. The method of claim 14 further comprising determining a reactive index for the first kiln dust and determining a reactive index for the second kiln dust.
25. The method of claim 24 :
wherein the step of determining the reactive index for the first kiln dust uses the following equation:
RI 1 =MP 1 /SSA 1
wherein RI 1 is the reactive index, for the first kiln dust, MP 1 is a measured parameter of the first kiln dust, and SSA 1 is the specific surface area of the first kiln dust, and
wherein the step of determining the reactive index for the second kiln dust uses the following equation:
RI 2 =MP 2 /SSA 2
wherein RI 2 is the reactive index for the second kiln dust, MP 2 is a measured parameter of the second kiln dust, and SSA 2 is the specific surface area of the second kiln dust.
26. The method of claim 25 , wherein the measured parameter is compressive strength, Young's modulus, fluid loss, thickening time, a rheological value, free water, or any combination thereof.
27. The method of claim 25 wherein performance of the blended cementitious component is optimized using the following equation:
EP blend =(RI 1 )(SSA 1 )( f 1 ) m +(RI 2 )(SSA 2 )( f 2 ) m
wherein EP is an estimated parameter for the blended cementitious component, f 1 is mass fraction of first kiln dust, f 2 is mass fraction of the second kiln dust, and m is a value from 1 to 10, and wherein the optimizing comprises adjusting f 1 and/or f 2 .
28. The method of claim 14 wherein settable composition is used in primary cementing in the well bore.
29. The method of claim 14 wherein the sellable composition is used remedial cementing in the well bore.