Nanoparticles and absorbent polymer wellbore cleanout compositions and methods of use thereof
Methods for wellbore cleanout operations may comprise introducing a wellbore cleanout fluid through one or more conduits into a wellbore, the cleanout fluid comprising an aqueous base fluid, an absorbent polymer, and a lubricant; wherein the lubricant comprises a colloidal dispersion fluid and nanoparticles, the nanoparticles have a particle size distribution characterized by a D50 value of about 1 nm to about 120 nm and are present in an amount of about 0.1 wt % to about 10 wt %, based on the weight of the lubricant.
1 . A method for wellbore cleanout comprising:
hydrating an absorbent polymer; subsequently
foaming a wellbore cleanout composition with a foaming gas to a foam quality of about 65% to about 80%; subsequently
introducing the wellbore cleanout composition through one or more conduits into a wellbore, the wellbore cleanout composition comprising
an aqueous base fluid, at about 86 wt % to about 99.8 wt %, by weight of the wellbore cleanout fluid, the absorbent polymer at about 0.1 wt % to about 4 wt %, by weight of the wellbore cleanout fluid, and a lubricant at about 0.1 wt % to about 10 wt %, by weight of the wellbore cleanout fluid;
wherein the lubricant comprises a colloidal dispersion fluid at about 99.9 wt % to about 90 wt %—and nanoparticles at about 0.1 wt % to about 10 wt %, by weight of the lubricant, the nanoparticles have a particle size distribution characterized by a D50 value of about 30 nm to about 90 nm and are present in an amount of about 0.1 wt % to about 10 wt %, based on the weight of the lubricant, and wherein the lubricant has a coefficient of friction of about 0.150 to about 0.027 as measured in deionized water.
2 . The method of claim 1 , wherein the one or more conduits comprise at least one selected from the group consisting of drilling string, tubing string, joined tubing, and coiled tubing.
3 . The method of claim 1 , wherein the absorbent polymer comprises a copolymer of 2-acrylamido-2-methylpropane sulfonate and acrylamide.
4 . The method of claim 1 , wherein the absorbent polymer is present in the cleanout fluid in an amount of about 1 gpt to about 6 gpt.
5 . The method of claim 1 , wherein nanoparticles comprise at least one selected from the group consisting of metal hydroxides, iron hydroxide, metal oxides, iron oxide, aluminum oxide, suboxides, oxyhydroxides, hematite, magnesium, nickel, zinc, magnetite, metal carbonates, calcium carbonate, metal sulphates, barium sulfate, metal sulfides, iron sulfide, and any combination thereof.
6 . The method of claim 1 , wherein the nanoparticles are present in an amount of about 1 wt % to about 3 wt %, based on the weight of the lubricant; and the colloidal dispersion fluid comprises at least one oleaginous fluid and the at least one oleaginous fluid is present in an amount of about 95 wt % to about 99 wt %, based on the weight of the lubricant.
7 . The method of claim 1 , wherein the cleanout fluid further comprises a foaming agent.
8 . The method of claim 1 , wherein the cleanout fluid does not comprise a surfactant foaming agent.
9 . The method of claim 1 , wherein the wellbore is an extended reach well.
10 . The method of claim 1 , wherein the wellbore comprises debris, further comprising circulating the wellbore cleanout composition in the wellbore; and removing debris from the wellbore via the return of the wellbore cleanout composition.
11 . The method of claim 10 , wherein the conduit comprises a jet nozzle and the method comprises using the jet nozzle to detach debris from the wellbore; suspending wellbore debris and detached debris in the wellbore cleanout composition; and removing wellbore debris and detached debris from the wellbore via the return of the wellbore cleanout composition.