US 12,247,160 B2
Method for controlling production of excessive water and aqueous fluids in oil and gas wells
Chee Fei Chin, Singapore (SG); Zhihua Zhang, Singapore (SG); Zhenxing Cheng, Shanghai (CN); Ahmed Rabie, Willingboro, NJ (US); and Hoang Van Le, Spring, TX (US)
Assigned to ENERGY SOLUTIONS (US) LLC, Princeton, NJ (US)
Appl. No. 17/629,039
Filed by ENERGY SOLUTIONS (US) LLC, Princeton, NJ (US)
PCT Filed Jul. 23, 2019, PCT No. PCT/CN2019/097186
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/012172, PCT Pub. Date Jan. 28, 2021.
Prior Publication US 2022/0275267 A1, Sep. 1, 2022
Int. Cl. C09K 8/508 (2006.01); C08F 120/56 (2006.01); C09K 8/504 (2006.01)
CPC C09K 8/5083 (2013.01) [C08F 120/56 (2013.01); C09K 8/5045 (2013.01)] 13 Claims
 
1. A method for controlling aqueous fluids by treating a subterranean formation in a producing well, comprising the steps of:
(1) providing an emulsion comprising: (a) a copolymer in an amount of from 10 wt % to 30 wt %; (b) a water soluble salt in an amount of from 10 wt % to 50 wt %; and (c) optionally a polyol; weight percentages are based on the total weight of the emulsion;
(2) diluting said emulsion in water to form a treatment fluid;
(3) introducing said treatment fluid into the producing well,
wherein said emulsion is prepared by a process comprising the steps of:
(i) preparing an ionic charged polymeric dispersant from at least an ionic monomer, optionally in the presence of a radical polymerization control agent; and
(ii) charging said polymer dispersant into an aqueous solution comprising a nonionic monomer and an ionic monomer, the mixture is then subject to continuous polymerization, in presence of a water soluble salt, to obtain said copolymer.