Heavy oil dirt cleaning agent

Abstract

The invention relates to a heavy oil dirt cleaning agent which comprises the following components in parts by weight: 60-80 parts of 200# solvent oil, 1-10 parts of 2-methyl-2,4-pentanediol and 20-30 parts of alcohol ether surfactant. For the heavy oil dirt cleaning agent, the closed flash point is higher than 61 DEG C, the oil cleaning rate at 30 DEG C can be up to 98% or above, and the cleaning effect is excellent; in use, a 5-10% water solution (mass percentage) can achieve the excellent cleaning effect; compared with the traditional oil layer cleaning agent, the safety is greatly improved, and the personal safety of a user can be guaranteed; and the heavy oil dirt cleaning agent is low in cost and wide in application range, can be used for cleaning heavy oil dirt and asphalt, can be also used for other purposes in addition to stratum cleaning, and achieves a very good cleaning effect.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, and relates to a cleaning agent, in particular to a heavy oil dirt cleaning agent. Background technique [0002] During the exploitation of heavy oil reservoirs, the precipitation of bitumen, colloid, and wax cannot be ignored. As early as the 1970s, the research results of many experts such as L. Cuiec in the United States showed that a large amount of crude oil in heavy oil reservoirs Part of asphalt, 15% colloid, and 15% wax will remain in the porous medium, and the total retention can reach 3 mg / m3, which will bring great disasters to oil field development. Specifically, it is manifested in the following aspects: 1. The precipitation of asphalt, colloid, and wax in the rock pores causes the reservoir space to become smaller and reduces the absolute permeability of the oil layer. 2. The adsorption of asphalt, colloid, and wax on the rock surface causes the roc...

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Problems solved by technology

2. The adsorption of asphalt, colloid, and wax on the rock surface causes the wetting reversal of the rock. Once the formation changes from water-wet to oil-wet, the relative permeability of crude oil will drop significantly

In the past, people used to inject a large amount of organic solvents such as diesel or benzene to solve the precipitation of organic matter. However, there are several problems in the application of organic solvents: the amount of organic solvents is large and the cost is high; organic solvents have low flash points and poor safety; organic solvents are of course It is a better asphalt, colloid and waxy solvent

However, the main function of the solvent is to dilute and disperse the organic matter to finally achieve the purpose of removing the organic precipitation, which cannot prevent the re-adsorption of the organic precipitation to the surface of the rock particles; the organic solvent has a large molecular weight and has a small penetration effect on the boundary layer. Solvents are not effective in debonding the boundary layer

[0005] Through searching, no patent documents identical to this patent have been found

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