Set-delayed cement compositions comprising hydrated lime and silica and methods of cementing in subterranean formations

Abstract

Methods of cementing in subterranean formations are provided. An example of a method is a method comprising: providing a set-delayed cement composition comprising: water, and a cementitious component consisting essentially of: hydrated lime, and silica; placing the set-delayed cement composition into a subterranean formation; and allowing the set-delayed cement composition to set in the subterranean formation.

1 . A method comprising: 
 providing a set-delayed cement composition comprising: water, and a cementitious component consisting essentially of: hydrated lime, and silica;    placing the set-delayed cement composition into a subterranean formation; and    allowing the set-delayed cement composition to set in the subterranean formation.    
   
   
       2 . The method of  claim 1  wherein the subterranean formation has a bottom-hole-circulating temperature in the range of from about 400° F. to about 500° F.  
   
   
       3 . The method of  claim 1  wherein the hydrated lime is present in the set-delayed cement composition in an amount in the range of from about 1% to about 40% by weight of the cementitious component.  
   
   
       4 . The method of  claim 1  wherein the silica is present in the set-delayed cement composition in an amount in the range of from about 60% to about 99% by weight of the cementitious component.  
   
   
       5 . The method of  claim 1  wherein the water is present in the set-delayed cement composition in an amount in the range of from about 20% to about 80% by weight of the cementitious component.  
   
   
       6 . A method comprising: 
 providing a set-delayed cement composition comprising: water, and a cementitious component consisting essentially of: hydrated lime, and silica;    placing the set-delayed cement composition into a subterranean formation, within a time period in the range of from about 12 hours to about seven days after the set-delayed cement composition has been provided; and    permitting the set-delayed cement composition to set in the subterranean formation.    
   
   
       7 . The method of  claim 6  wherein the set-delayed cement composition comprises a dispersant.  
   
   
       8 . The method of  claim 6  further comprising adding a set retarder to the set-delayed composition before placing the set-delayed cement composition into a subterranean formation.  
   
   
       9 . The method of  claim 6  wherein the subterranean formation has a bottom-hole-circulating temperature in the range of from about 400° F. to about 500° F.  
   
   
       10 . The method of  claim 6  wherein the hydrated lime is present in the set-delayed cement composition in an amount in the range of from about 1% to about 40% by weight of the cementitious component.  
   
   
       11 . The method of  claim 6  wherein the silica is present in the set-delayed cement composition in an amount in the range of from about 60% to about 99% by weight of the cementitious component.  
   
   
       12 . The method of  claim 6  wherein the water is present in the set-delayed cement composition in an amount in the range of from about 20% to about 80% by weight of the cementitious component.  
   
   
       13 . A method comprising: 
 providing a set-delayed cement composition comprising: water, a set retarder, and a cementitious component consisting essentially of: hydrated lime, and silica;    placing the set-delayed cement composition into a subterranean formation, within a time period in the range of from about 5 minutes to about 24 hours after the set-delayed cement composition has been provided; and    permitting the set-delayed cement composition to set in the subterranean formation.    
   
   
       14 . The method of  claim 13  wherein the subterranean formation has a bottom-hole-circulating temperature in the range of from about 400° F. to about 500° F.  
   
   
       15 . The method of  claim 13  wherein the hydrated lime is present in the set-delayed cement composition in an amount in the range of from about 1% to about 40% by weight of the cementitious component.  
   
   
       16 . The method of  claim 13  wherein the silica is present in the set-delayed cement composition in an amount in the range of from about 60% to about 99% by weight of the cementitious component.  
   
   
       17 . The method of  claim 13  wherein the water is present in the set-delayed cement composition in an amount in the range of from about 20% to about 80% by weight of the cementitious component.