WINZE TREATMENT FLUID, FRACTURE FORMING METHOD AND WINZE HOLE FILLING METHOD

摘要

To provide a novel winze treatment fluid having reduced environmental load.SOLUTION: The present invention provides a winze treatment fluid containing a nonionic polyamino acid derivative containing an α- or β-polyaspartic acid monomer unit represented by formula (I) and formula (II). (R1 is a C3-18 hydrocarbon group; Ris a hydroxymethyl group, a hydroxyethyl group, a hydroxypropyl group, a hydroxybutyl group, a hydroxypentyl group, a hydroxyethoxyethyl group, a methoxymethyl group, a methoxyethyl group, a methoxypropyl group, a methoxybutyl group, a methoxypentyl group, an ethoxymethyl group, an ethoxyethyl group, an ethoxypropyl group, an ethoxybutyl group, an ethoxypentyl group, an N, N-dimethylaminopropyl group or an N, N-diethylaminopropyl group).SELECTED DRAWING: None