Lost circulation compositions comprising red mud
The invention is directed to lost circulation material (LCM) compositions capable of forming geopolymers, said LCM compositions comprising red mud, a silica source, a developed alkaline activator (DAA), and an aqueous source, and methods and systems related thereto for treating a lost circulation zone within a subterranean formation using the LCM compositions which form said geopolymers therein so as to at least partially prevent lost circulation.
1 . A method comprising:
providing a lost circulation material (LCM) composition comprising:
a red mud;
a silica source comprising silicon dioxide (SiO 2 );
a developed alkaline activator (DAA), wherein the DAA comprises a sodium silicate ((SiO 2 ) n :Na 2 O) and sodium hydroxide (NaOH); and
an aqueous source;
wherein the red mud comprises a sodium content in an amount in the range of about 20 wt. % to about 40 wt. % based on total weight of the red mud;
placing the LCM composition in a lost circulation zone in a subterranean formation; and
allowing the LCM composition to set to form a geopolymer in the lost circulation zone so as to at least partially prevent lost circulation.
2 . The method of claim 1 , wherein the red mud is present in the LCM composition in an amount in the range of about 50 wt. % to about 70 wt. % based on total solids in the LCM composition.
3 . The method of claim 1 , wherein the silica source further comprises silica fume, Portland cement, or any combination thereof.
4 . The method of claim 1 , wherein the silica source is present in the LCM composition in an amount in the range of about 0.1 wt. % to about 50 wt. % based on total weight of the red mud.
5 . The method of claim 1 , wherein the DAA comprises sodium silicate and sodium hydroxide at a molar ratio of about 1.5:1 to about 2.5:1.
6 . The method of claim 1 , wherein the LCM composition comprises silicon dioxide and aluminum oxide in a molar ratio of about 2 to about 4.
7 . The method of claim 1 , wherein the LCM composition comprises the DAA and aluminum oxide in a molar ratio of about 0.4 to about 1.
8 . The method of claim 1 , wherein the aqueous source comprises an aqueous source selected from the group consisting of deionized water, tap water, fresh water, salt water, natural brine, synthetic brine, municipal water, formation water, produced water, well water, filtered water, distilled water, sea water, purified contaminated water, and any combination thereof.
9 . The method of claim 1 , wherein the aqueous source is present in the LCM composition in an amount in the range of about 10 wt. % to about 70 wt. % based on total weight of the red mud.
10 . The method of claim 1 , wherein the LCM composition further comprises a calcium source; wherein the calcium source is present in the LCM composition in an amount in the range of about 2 wt. % to about 8 wt. % based on total weight of the red mud; and wherein the calcium source is lime.
11 . The method of claim 1 , wherein the LCM composition has a density in the range of about 70 lb/ft 3 to about 170 lb/ft 3 .
12 . The method of claim 1 , wherein the LCM composition has a viscosity in the range of about 10 cP to about 150 cP.
13 . The method of claim 1 , wherein the LCM composition has a plastic viscosity in the range of about 10 cP to about 50 cP and a yield point in the range of about 2 lbf/100 ft 2 to about 40 lbf/100 ft 2 .
14 . The method of claim 1 , wherein the LCM composition has a thickening time at a temperature of about 100° F. of about 1 hour to about 6 hours and a setting time at a temperature of about 180° F. of equal to or greater than about 24 hours.
15 . The method of claim 1 , wherein, after setting the LCM composition at a temperature of about 180° F. and a time of about 24 hours, the geopolymer has a compressive strength in the range of about 500 psi to about 700 psi.
16 . The method of claim 1 , wherein the formation temperature conditions are in the range of 70° F. to 290° F.
17 . A system comprising:
a tubular extending into a wellbore in a subterranean formation; and
a pump fluidly coupled to the tubular,
wherein the pump is configured to convey a lost circulation material (LCM) composition into the wellbore via the tubular at a pressure sufficient for the LCM composition to penetrate a lost circulation zone of the subterranean formation, the LCM composition comprising:
a red mud;
a silica source comprising silicon dioxide (SiO 2 );
a developed alkaline activator (DAA), wherein the DAA comprises a sodium silicate ((SiO 2 ) n :Na 2 O) and sodium hydroxide (NaOH); and
an aqueous source; and
wherein the red mud comprises a sodium content in an amount in the range of about 20 wt. % to about 40 wt. % based on total weight of the red mud.