| abstract |
The invention belongs to the technical field of oilfield development, and particularly relates to a temporary plugging agent and a preparation method thereof. The temporary plugging agent of the present invention comprises hydrophilic organic solid phase particles and a water-swellable gel layer coated on the surface of the organic solid phase particles; the organic solid phase particles are selected from polyvinyl alcohol, polylactic acid, organic acid , at least two of polyoxymethylene; the gel layer is formed by the reaction of a coating liquid containing a polymerized monomer, a crosslinking agent and an initiator on the surface of the organic solid phase particles, and the polymerized monomer includes acrylic acid, acrylamide, Monoalkyl maleate; the number of carbon atoms in the alkyl group in the monoalkyl maleate is 8 or more. The gel layer in the temporary plugging agent of the present invention contains monoalkyl maleate, so that the gel layer has the active function of surface dispersion, which is conducive to the dispersion of the temporary plugging agent in the carrier fluid, and is used in different occasions and temporary plugging. The need for steering. |