Methods of cementing with lightweight cement composition
AssigneeHalliburton Energy Services, Inc.
InventorsDavid S. Kulakofsky, Pedro Pulido, Raul Bonifacio, Octavio Araujo Morales
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Abstract
Foamed cement compositions comprising density reducing additives and methods of making and using the same are disclosed. In one embodiment, a method of cementing is disclosed. The method of cementing comprises preparing a base cement composition comprising a cement, a water, and a density reducing additive, wherein the base cement composition comprises a base density. The method further comprises introducing a gas to the base cement composition to provide a cement composition having a density less than the base density and allowing the cement composition to set.
Claims26
A method of cementing a wellbore in a subterranean formation, comprising:
- selecting a target density of a final cement composition, wherein the target density is from about 5 to about 7.5 pounds per gallon of cement composition;
- forming a base cement composition, wherein the base cement composition has a first density greater than the target density by a density factor of from about 1.01 to about 1.4, and wherein the base cement composition comprises a cement, a water, and a density reducing additive;
- adding a sufficient amount of a gas to the base cement composition to reduce the first density to about the target density, thereby forming the final cement composition;
- placing the final cement composition in the wellbore;
- and
- allowing the final cement composition to set.
A method of cementing a wellbore in a subterranean formation, comprising:
- selecting a target density of a final cement composition;
- forming a base cement composition, wherein the base cement composition has a first density greater than the target density by a density factor of from about 1.01 to about 1.4, and wherein the base cement composition comprises a cement, a water, and a density reducing additive;
- adding a sufficient amount of a gas to the base cement composition to reduce the first density to about the target density, thereby forming the final cement composition;
- placing the final cement composition in the wellbore;
- and
- allowing the final cement composition to set, wherein the final cement composition has a tensile strength of from about 30 psi to about 500 psi.
A method of cementing a wellbore in a subterranean formation, comprising:
- selecting a target density of a final cement composition;
- forming a base cement composition, wherein the base cement composition has a first density greater than the target density by a density factor of from about 1.01 to about 1.4, and wherein the base cement composition comprises a cement, a water, and a density reducing additive;
- adding a sufficient amount of gas to the base cement composition to reduce the first density to about the target density, thereby forming the final cement composition;
- placing the final cement composition in the wellbore;
- and
- allowing the final cement composition to set, wherein the final cement composition has a Young's modulus of from about 60,000 to about 6,000,000.
A method of cementing a wellbore in a subterranean formation, comprising:
- selecting a target density of a final cement composition;
- forming a base cement composition, wherein the base cement composition has a first density greater than the target density by a density factor of from about 1.01 to about 1.4, and wherein the base cement composition comprises a cement, a water, and a density reducing additive;
- adding a sufficient amount of a gas to the base cement composition to reduce the first density to about the target density, thereby forming the final cement composition;
- placing the final cement composition in the wellbore;
- and
- allowing the final cement composition to set, wherein the density reducing additive comprises hollow glass beads, pozzolanic microspheres, solid beads, or combinations thereof.
A method of cementing a wellbore in a subterranean formation, comprising:
- selecting a target density of a final cement composition;
- forming a base cement composition, wherein the base cement composition has a first density greater than the target density by a density factor of from about 1.01 to about 1.4, and wherein the base cement composition comprises a cement, a water, and a density reducing additive;
- adding a sufficient amount of a gas to the base cement composition to reduce the first density to about the target density, thereby forming the final cement composition;
- placing the final cement composition in the wellbore;
- and
- allowing the final cement composition to set, wherein adding gas to the base cement composition comprises adding an expanding agent comprising foaming agents, foam stabilizing agents, expanding additives, or combinations thereof to the base cement composition.
Dependencies are inferred from the claim text.