Methods Of Cementing And Lassenite-Containing Cement Compositions

Abstract

Cement compositions and methods of making the same are provided. The composition comprises cement or lime, water and Lassenite, a pozzolanic strength retrogression inhibitor.

What is claimed is: 
     
         1 . A cement composition, comprising:
 cement;   an aqueous fluid present in an amount from about 20% to about 80% by weight of the cement;   a pozzolan present in an amount from about 10% to about 40% by weight of the cement; and   a modifying additive selected from lime, weighting additives, and dispersants;   wherein the pozzolan comprises a crystalline porous aluminosilicate and is a strength retrogression inhibitor; and   wherein the compressive strength of the cement composition is at least 50 psi three hours after curing at 190° F. and the compressive strength of the cement composition measured at 72 hours is greater than the compressive strength of the cement composition measured at 24 hours.   
     
     
         2 . The cement composition of  claim 1 , wherein the cement is selected from Portland cements, gypsum cements, high alumina content cements, slag cements, high magnesia content cements, shale cements, acid/base cements, fly ash cements, zeolite cement systems, kiln dust cement systems, microfine cements, metakaolin, and combinations thereof 
     
     
         3 . The cement composition of  claim 1 , wherein the aqueous fluid is water selected from fresh water, brackish water, saltwater, and any combination thereof 
     
     
         4 . The cement composition of  claim 1 , wherein the aqueous fluid is water in an amount selected from about 20% to about 80% by weight of the cement, about 28% to about 60% by weight of the cement, and about 36% to about 66% by weight of the cement. 
     
     
         5 . The cement composition of  claim 4 , wherein the pozzolan further comprises silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ). 
     
     
         6 . The cement composition of  claim 5 , wherein the silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ), comprise at least 80% by weight of the total oxide content of the pozzolan. 
     
     
         7 . The cement composition of  claim 5 , wherein the silicon dioxide (SiO 2 ) comprises from about 65% to about 75% by weight of the total oxide content of the pozzolan; and wherein the aluminum oxide (Al 2 O 3 ) comprises from about 10% to about 15% by weight of the total oxide content of the pozzolan. 
     
     
         8 . The cement composition of  claim 1 , wherein the cement composition develops a compressive strength of from about 3200 psi to about 3500 psi at about 24 hours after curing at 190° F. 
     
     
         9 . A cementitious composition, comprising:
 cement   a crystalline porous aluminosilicate;   a calcium source; and   an aqueous fluid;   wherein the porous aluminosilicate is a natural pozzolan and a strength retrogression inhibitor; and   wherein the compressive strength of the cement composition measured at 72 hours is greater than the compressive strength of the cement composition measured at 24 hours.   
     
     
         10 . The cementitious composition of  claim 9 , wherein the pozzolan comprises silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ). 
     
     
         11 . The cementitious composition of  claim 10 , wherein the silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ), comprise at least 80% by weight of the total oxide content of the pozzolan. 
     
     
         12 . The cementitious composition of  claim 10 , wherein the silicon dioxide (SiO 2 ) comprises from about 65% to about 75% by weight of the total oxide content of the pozzolan; and wherein the aluminum oxide (Al 2 O 3 ) comprises from about 10% to about 15% by weight of the total oxide content of the pozzolan. 
     
     
         13 . The cementitious composition of  claim 9 , wherein the calcium source comprises lime in an amount of from about 15% to about 40% by weight of the pozzolan. 
     
     
         14 . The cementitious composition of  claim 9 , wherein the aqueous fluid is water selected from fresh water, brackish water, saltwater, and any combination thereof. 
     
     
         15 . The cementitious composition of  claim 9 , wherein the cementitious composition develops a compressive strength of from about 500 psi to about 700 psi at about 24 hours after curing at 180° F. 
     
     
         16 . A cementitious composition, comprising:
 cement;   a pozzolan; and   an aqueous fluid;   wherein the pozzolan comprises a porous aluminosilicate and is a strength retrogression inhibitor; and   wherein the compressive strength of the cement composition is at least 50 psi three hours after curing at 190° F. and the compressive strength of the cement composition measured at 72 hours is greater than the compressive strength of the cement composition measured at 24 hours.   
     
     
         17 . The cement composition of  claim 16 , wherein the aqueous fluid is water in an amount selected from about 20% to about 80% by weight of the cement, about 28% to about 60% by weight of the cement, and about 36% to about 66% by weight of the cement. 
     
     
         18 . The cement composition of  claim 15 , wherein the pozzolan comprises silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ); and 
     
     
         19 . The cement composition of  claim 18 , wherein the silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ), comprise at least 80% by weight of the total oxide content of the pozzolan. 
     
     
         20 . The cementitious composition of  claim 16 , further comprising a lime in an amount of from about 15% to about 40% by weight of the pozzolan.