Cleaning sand-carrying liquid

Abstract

The invention discloses a cleaning sand-carrying liquid. The cleaning sand-carrying liquid is characterized by consisting of the following substances according to the mass ratios: 25-30 parts of a viscoelastic surfactant, 12-15 parts of counter-ions, 10-20 parts of a solvent and 100 parts of water. The cleaning sand-carrying liquid in the technical scheme adopted in the invention has the followingadvantages of single agent, convenient liquid preparation, no macromolecular substances, association and thickening, low gel breaking viscosity, and outstanding anti-swelling and flowback performance.

Description

technical field [0001] The invention relates to a clean sand-carrying fluid, which belongs to the technical field of oil and gas exploitation. Background technique [0002] The invention patent with the patent application number 2016104382324 discloses a cleaning sand-carrying liquid, which is composed of A agent, B agent and water. Among them, A agent accounts for 3%-10%, B agent accounts for 0.5%-3%, and water accounts for 87%. %~96.5%; Among them, the agent A is composed of surfactant APG and dimethyldiallyl ammonium chloride homopolymer, the surfactant APG accounts for 80%~90%, dimethyldiallyl Ammonium chloride homopolymer accounts for 10% to 20%; the B agent is composed of the following components: tallow dihydroxyethyl amine oxide 80% to 90%, nonionic fluorosurfactant 0.5% to 1% , polyaspartic acid 0.5% to 1%, water 8% to 19%. The cleaning sand-carrying fluid of the present invention has good anti-swelling, drainage-aiding and scale-inhibiting functions; good gel bre...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned cleaning and sand-carrying fluid is inconvenient to mix, has macromolecular substances, associates and thickens, has high gel-breaking viscosity, and poor anti-swelling and flow-back performance