Method of limiting permeability of a matrix to limit liquid and/or gas inflow

A method of limiting or reducing permeability of a matrix to limit or reduce liquid or gas inflow within the passages of the matrix having dimension substantially narrower than 160 micron, the method comprising measuring one or more parameters relating to said matrix and selecting one or more components of a multi-component sealing composition based on a polymer emulsion or colloid with reference to said measured parameters and introducing said components of said sealing composition by pumping into said permeable matrix at a pressure varied in response to changes in the measured parameters relating to said matrix, wherein said sealing composition is set or coagulated in a non-exothermic process to form a seal barrier;

• and
• wherein said polymer emulsion or colloid contains, prior to purposeful coagulation whether due to interaction with at least one selected additive or shear, particles of said polymer emulsion or colloid and any selected additive particles, said particles having a size distribution smaller than for Portland cement;
• and
• wherein particle density and size of particles within the emulsion or colloid are modified, while maintaining said particle size distribution smaller than for Portland cement, to vary at least one of curing rate and setting time.

A method of limiting or reducing permeability of a matrix to limit or reduce liquid or gas inflow within the passages of the matrix having dimension substantially narrower than 160 micron, the method comprising measuring one or more parameters relating to said matrix and selecting one or more components of a multi-component sealing composition based on a polymer emulsion or colloid with reference to said measured parameters and introducing said components of said sealing composition by pumping into said permeable matrix at a pressure varied in response to changes in the measured parameters relating to said matrix,

• wherein said sealing composition is set or coagulated in a non-exothermic process to form a seal barrier;
• wherein said polymer emulsion or colloid contains, prior to coagulation due to agitation or shear, particles of said polymer emulsion or colloid, said particles having a size distribution smaller than for Portland cement;
• and
• wherein particle density and size of particles within the emulsion or colloid are modified, while maintaining said particle size distribution smaller than for Portland cement, to vary at least one of curing rate and setting time.