Nano composite high-temperature-resistant extraction aid for thickened oil and super-thickened oil recovery and preparation method thereof

Abstract

Disclosed is a high-temperature resistant nano composite mining additive for mining heavy oil and super heavy oil, which is prepared from 3-8 wt% of a modified nano-inorganic additive, 3-8 wt% of petroleum sulfonate, 10-40 wt% of a viscosity depressant, 5-15 wt% of an emulsifier, 2-10 wt% of a surface wetting agent, 2-10 wt% of a penetrant, 5-10 wt% of a polymer modifier,and 1-8 wt% of a catalyst, with a balance being water. Also disclosed is a preparation process for the above-mentioned high-temperature resistant nano composite mining additive for mining heavy oil and super heavy oil. The mining additive of the present invention has the advantages of a good high-temperature resistant performance, and an excellent emulsification performance and anti-salt performance, thereby significantly improving the efficiency of production and reducing the cost of mining.

Description

technical field

[0001] The invention relates to the field of petroleum enhanced oil recovery, in particular to a nanocomposite high-temperature resistant recovery aid for heavy oil and super heavy oil and a preparation method thereof. Background technique

[0002] Due to the tight supply of crude oil worldwide, abundant heavy and super-heavy oils have attracted increasing attention. In the process of crude oil production, the crude oil in the oil layer seeps to the bottom of the well through the porous medium, and then is lifted to the ground through the lifting system. During the process of seepage of heavy oil and super heavy oil from the reservoir to the bottom of the well, due to the high content, high viscosity and slow flow of some heavy components such as colloid, asphaltene and paraffin contained in heavy oil and super heavy oil, it is easy to Adhering and accumulating on the surface of the near wellbore channel, resulting in a decrease in oil well production, high ...

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