High-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor

Abstract

The invention relates to a high-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor, which mainly solves problems of oil well large operation load caused by severe paraffin precipitation of high paraffin-containing oil wells at alpine regions, and compromising oil well yield caused by short hot washing period. The paraffin remover and inhibitor comprises a main agent of A agent system, and an auxiliary agent of B agent system, wherein the main agent of A agent system comprises the following component by weight: 1-3% of oil-soluble high-molecular polymer, 40-60% of aromatic hydrocarbon organic solvents, 10-20% of low carbon alcohol, 3-10% of composite emulsifiers, and 10-30% of water; the auxiliary agent of B agent system comprises the following component by weight: 7-15% of acid electrolytes, and 85-93% of water; the ratio of the main agent of A agent system to the auxiliary agent of B agent system is 100:0.8-1.2. The high-efficient environment-friendly composite antifreezing emulsion paraffin remover and inhibitor can effectively remove paraffin and inhibit paraffin, reaches the purposes of reducing oil well operation load and prolonging well washing period, has a low condensation point, and thus is especially suitable for winter paraffin removal at alpine regions.

Description

Technical field: [0001] The invention relates to the technical field of chemical paraffin removal and anti-wax for production wells in oil fields, in particular to an efficient and environment-friendly compound antifreeze type emulsion anti-wax agent. Background technique: [0002] For oilfields in alpine regions, crude oil has high wax content and high freezing point. In the later stage of development, wax deposition in production wells is serious, and the hot cleaning cycle of oil wells is short, which affects production. At present, the wax removers and anti-wax agents used on site are mainly traditional oil-based solvent wax removers and water-based wax removers. Oil-based solvent wax remover has high wax removal efficiency but has pungent odor, low density, volatile, flammable, explosive, high toxicity, poor safety, and poor application effect in oil wells with high water content. Using solvent-based wax remover to remove wax will cause the pump stator material to expa...

AI Technical Summary

Problems solved by technology

Oil-based solvent wax remover has high wax removal efficiency but has pungent odor, low density, volatile, flammable, explosive, high toxicity, poor safety, and poor application effect in oil wells with high water content. Using solvent-based wax remover to remove wax will cause the pump stator material to expand, deform and damage; water-based wax remover has low toxicity, but it is mainly surfactant. Due to the high price of surfactant, the use concentration is large, and the wax-proof effect Good, but the efficiency of wax removal is very low, and the scope of promotion and application is limited; due to the rising prices of organic solvents and surfactants in recent years, the settlement price and cost of this type of wax remover and anti-wax agent have been inverted. Mixed fish and dragons affect the wax removal of production oil wells, and the frequency of hot washing increases, resulting in heavy tasks for hot washing wells and affecting production

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