FIELD: oil and gas industry.
SUBSTANCE: invention relates to a composition containing water-soluble polymers for treating a section of a subterranean formation. The composition for obtaining an injected fluid for oil and gas production contains: an inverse emulsion of a water-soluble polymer A containing acrylamide monomer units, and solid particles of a water-soluble polymer B. When this water-soluble polymer B is obtained through a polymerization step of at least acrylamide and from 1 to 15 mol. % acrylamido-tert-butylsulfonic acid - ATBS and / or its salts and the subsequent stage of additional processing of the obtained polymer. An injection fluid obtained by mixing water or brine with the above composition, wherein said fluid contains a total of Polymer A and Polymer B between 0.0005 and 1 wt%. A method for treating a section of a subterranean formation includes providing the above composition, obtaining said injected fluid, and introducing this fluid into the subterranean formation or a portion thereof. The fracturing method includes providing the above composition, producing said fracturing fluid containing a proppant, and introducing the fracturing fluid into a portion of the subterranean formation. The method of polymer injection includes providing the above composition, obtaining an injection fluid for polymer injection and introducing it into the entire subterranean formation or a portion thereof. The method for improving the effect of providing suspension in the injected fluid includes providing the above composition, obtaining the injected fluid by mixing the composition with water, and introducing the injected fluid into the entire subterranean formation or its section.
EFFECT: improvemed viscosity and / or provision of suspension, in particular, if there are high shear forces.
30 cl, 7 tbl, 2 dwg
