High temperature universal fluids and methods and systems related thereto

A method comprising:

• providing a flowable universal fluid (UF) comprising a mixture of:
• an aqueous-based carrier fluid;
• an aluminosilicate material;
• a set retarding agent;
• a polyacrylamide viscosifier;
• and
• a fluid loss control agent comprising at least one component selected from the group consisting of an ether-substituted starch polymer, an ester-substituted starch polymer, a phosphorylated starch polymer, an oxidized starch polymer, a carboxymethylated starch polymer, a styrene-butadiene polymer, and any combination thereof,
• wherein the fluid loss control agent is selected to match a surface charge of the aluminosilicate material, and
• wherein the flowable UF composition exhibits:
• a high temperature/high-pressure (HTHP) fluid loss volume of from 10 milliliters (mL) to 50 mL;
• and/or
• a HTHP filter cake thickness of from 5/32″ to 1″,
• as measured by API 13B-1 (2023);
• drilling a wellbore in a subterranean formation using the flowable UF composition, wherein at least a portion of the flowable UF composition remains in the wellbore upon completion of the drilling;
• introducing an alkaline activator into the wellbore, thereby contacting the remaining flowable UF composition therein with the alkaline activator;
• and
• allowing the activated flowable UF composition in the wellbore to solidify under formation temperature conditions, thereby forming a solidified UF composition in the wellbore.

A method comprising:

• providing a flowable universal fluid (UF) comprising a mixture of:
• an aqueous-based carrier fluid;
• an aluminosilicate material;
• a set retarding agent;
• a polyacrylamide viscosifier;
• and
• a fluid loss control agent comprising a styrene-butadiene polymer,
• wherein the flowable UF composition exhibits:
• a high temperature/high-pressure (HTHP) fluid loss volume of from 10 milliliters (mL) to 50 mL;
• and/or
• a HTHP filter cake thickness of from 5/32″ to 1″,
• as measured by API 13B-1 (2023);
• drilling a wellbore in a subterranean formation using the flowable UF composition, wherein at least a portion of the flowable UF composition remains in the wellbore upon completion of the drilling;
• introducing an alkaline activator into the wellbore, thereby contacting the remaining flowable UF composition therein with the alkaline activator;
• and
• allowing the activated flowable UF composition in the wellbore to solidify under formation temperature conditions, thereby forming a solidified UF composition in the wellbore.