Patent ID: 7621330

Claim:
A method of forming and delivering a treatment fluid into a wellbore, the method comprising the steps of continuously: (a) pumping a first fluid comprising a first aqueous solution; (b) pumping a second fluid comprising a second aqueous solution; (c) merging at least the first and second fluids to form a treatment fluid comprising a merged aqueous solution, wherein the merged aqueous solution comprises at least 25% by weight of the first aqueous solution and at least 25% by weight of the second aqueous solution, and wherein the merged aqueous solution has a merged viscosity of less than 100 cP at 40 l/s and at 25° C. (77° F.), and wherein the step of merging is after the steps of pumping the first and second fluids; and then (d) directing the treatment fluid into the wellbore; wherein: (i) the merged aqueous solution has a merged concentration of at least one component selected from the group consisting of: a dissolved ion, oil, grease, a production chemical, and suspended solids; (ii) the first aqueous solution has a concentration of the at least one component that is substantially lower than the merged concentration of the at least one component; (iii) the second aqueous solution has a concentration of the at least one component that is substantially higher than the merged concentration of the at least one component; and (iv) the first, second, and treatment fluids are handled as fluid streams.