Asphaltene deposition solid inhibitor for light oil exploitation

Abstract

The invention relates to asphaltene deposition solid inhibitor in the exploitation of light oil which can effectively reduce and control asphaltene to gather and deposit in the light oil exploitation process, which is used on the crude oil exploitation, and can solve the problems of asphaltene deposition and precipitation in the light oil exploitation process. The technical scheme is that the inhibitor is formed by high-pressure polyethylene, diesel fuel and other auxiliary agent, and the product of asphaltene deposition solid inhibitor can be obtained through conducting molten agglutination reaction for 20-60% high-pressure polyethylene, 10-40% diesel fuel and 20-40% other auxiliary agent which comprises three medicaments of polyoxyethylene ether, sodium dodecylbenzene sulfonate and 2,6-ditrertiarybutyl p-methyl phenyl under the temperature of 100-130 DEG C to form even mixture before molding. The product can be direct thrown into drug-carrying container or be thrown by means of a drug-adding pipe, is slowly released as the scouring of bottom hole oil stream, which can effectively inhibit the gathering and growth of asphaltene, solves the problem of pipe column plugging-up problem in well, and has the advantages of high inhibiting efficiency, long cycle, small additive dose and low cost.

Description

technical field [0001] The invention relates to a solid inhibitor of asphaltene deposition in light oil exploitation, which can effectively reduce and control the accumulation and settlement of asphaltene in the process of light oil exploitation, and belongs to the chemical used in the field of light oil exploitation. reagent. Background technique [0002] The heavy components of asphaltenes and colloids in crude oil cause many serious problems in crude oil production, including the formation of organic deposits in oil reservoirs, oil wells and oil pipeline equipment, which greatly increases the cost of production operations. Precipitation of asphaltenes is thus an ancient and costly problem in oil fields that has limited production and caused huge production losses since the early days of the oil industry. With the progress of oil extraction, colloids, asphaltene, mechanical impurities (oil sludge, oil sand, etc.) in crude oil interact and interact with each other, thus co...

AI Technical Summary

Problems solved by technology

[0002] The heavy components of asphaltenes and colloids in crude oil cause many serious problems in crude oil production, including the formation of organic deposits in oil reservoirs, oil wells and oil pipeline equipment, which greatly increases the cost of production operations

Precipitation of asphaltenes is therefore an ancient and costly problem in the oil field, and it has been limiting production and causing huge production losses since the early days of the oil industry

With the progress of oil extraction, colloids, asphaltene, mechanical impurities (oil sludge, oil sand, etc.) in crude oil interact and interact with each other, thus coalescing in the wellbore, blocking the production string, and causing the oil well to stop blowing Occurs from time to time, causing severe blockage of the tubing string in the well. At the same time, due to the slug blockage of the tubing, it brings great difficulty to the operation, and the operation process and operation cost increase.

The deposition of asphaltenes will have many adverse effects on crude oil production. In order to prevent clogging of oil pipes and ensure the normal production of oil wells, the measures often taken at present are mainly aimed at mechanical treatment (such as mechanical scraping) and chemical organic solvents in the process of heavy oil production. However, these measures also have certain limitations. For example, mechanical methods are not suitable for the removal of sediments in formations. In order to prevent asphaltene deposition, chemical organic solvents often require aromatic substances with a lower melting point. Usually used There are toluene and xylene, which are very effective chemical cleaners for asphaltenes, but these aromatic substances are too expensive and pollute the environment, and there are many other problems, such as short cleaning cycles, frequent operations, and high production costs , the operation is very dangerous, etc.