Patent ID: 7833947

Claim:
A method of treating a subterranean formation penetrated by a wellbore, the method comprising: a) providing a fluid comprising a carrier fluid and at least two different sizes of solid particulate materials selected from a group consisting of: (i) very large particles having a particle size greater than 1 mm; (ii) large particles having a particle size of from about 200-800 μm; (iii) medium particles having a particle size of from about 10-20 μm; (iv) fine particles having a particle size of from about 0.5-10 μm; (v) very fine particles having a particle size of from about 0.05-0.5 μm; and (vi) ultrafine particles having a particle size of from about 7-50 nm; wherein the packed volume fraction (PVF) of the two sizes of solid particulate materials exceeds 0.80, and wherein a first type of solid particulate materials comprises a first treating component, and a second type of solid particulate materials comprises a first chemical component able to be released by a first downhole trigger; b) pumping the fluid into the wellbore to treat the formation; and, c) allowing the first chemical component to be released by the downhole trigger.