Tunable control of pozzolan-lime cement compositions
AssigneeHalliburton Energy Services, Inc.
InventorsThomas Jason Pisklak, Kyriacos Agapiou
Life of this patent
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Abstract
A variety of cement compositions and methods of using cement compositions in subterranean formations. A method of formulating a cement composition may comprise: measuring surface area of a group of pozzolans, wherein the smallest measured surface area of the group of pozzolans and the largest measured surface area of the group of pozzolans vary by about 50% or greater. The method may further comprise selecting one or more pozzolans from the group of pozzolans. The method may further comprise adding components comprising lime and water to the selected one or more pozzolans to faun a cement composition.
Claims21
A method of cementing in a subterranean formation comprising:
- providing a first pozzolan;
- providing a second pozzolan, wherein the second pozzolan comprises pozzolan particles having a surface area that varies by about 50% or more from pozzolan particles of the first pozzolan;
- blending the first pozzolan and the second pozzolan to form a blended pozzolan;
- adding components comprising lime and water to the blended pozzolan to form a cement composition, wherein cementitious components present in the cement composition comprise pozzolans comprising the first pozzolan and the second pozzolan without any additional cementitious components other than the pozzolans that hydraulically set in the presence of the water;
- introducing the cement composition into the subterranean formation;
- and
- allowing the cement composition to set in the subterranean formation.
A system for cementing in a subterranean formation comprising:
- a first pozzolan,
- a second pozzolan;
- wherein the second pozzolan comprises pozzolan particles having a surface area that varies by about 50% or more from pozzolan particles of the first pozzolan,
- lime;
- and
- water;
- mixing equipment capable of mixing a cement composition, wherein the cement composition comprises the first pozzolan, the second pozzolan, the lime, and the water, wherein cementitious components present in the cement composition comprise pozzolans comprising the first pozzolan and the second pozzolan without any additional cementitious components other than the pozzolans that hydraulically set in the presence of water;
- and
- pumping equipment capable of pumping the cement composition formed by mixing the first pozzolan, the second pozzolan, the lime, and the water.
A method of cementing in a subterranean formation comprising:
- providing a first pozzolan;
- providing a second pozzolan, wherein the second pozzolan comprises pozzolan particles having a surface area that varies by about 50% or more from pozzolan particles of the first pozzolan;
- blending the first pozzolan and the second pozzolan to form a blended pozzolan;
- adding components comprising lime and water to the blended pozzolan to form a cement composition, wherein cementitious components present in the cement composition comprise pozzolans comprising the first pozzolan and the second pozzolan without any additional cementitious components other than the pozzolans that hydraulically set in the presence of the water;
- storing the cement composition in a pumpable fluid state for about a day or longer;
- introducing the cement composition into the subterranean formation;
- and
- allowing the cement composition to set in the subterranean formation.
Dependencies are inferred from the claim text.