Environment-friendly salt-resistant high-temperature-resistant oil displacement agent containing biological surfactant and used in petrochemical industry

Abstract

The invention discloses an environment-friendly salt-resistant high-temperature-resistant oil displacement agent containing biological surfactant and used in the petrochemical industry. The oil displacement agent comprises, by weight, 0.1 to 1.2 parts of sodium surfactin, 5 to 8 parts of tea saponin modifier and 80 to 85 parts of water. According to the invention, the sodium surfactin, the tea saponin modifier and other auxiliary components are combined for preparation of the oil displacement agent; the oil displacement agent can be used for exploitation of high-water-content, low-permeability, thickened, high-temperature and high-salt oil reservoirs and can improve oil displacement efficiency, sweep efficiency and recovery efficiency; the tea saponin modifier is prepared from tea saponin extracted from tea seed meal, so cost for the raw materials of the oil displacement agent is reduced; moreover, because of the characteristics of the sodium surfactin and the tea saponin, the sodium surfactin can be decomposed into 4 single amino acids and the tea saponin can be naturally decomposed by microorganisms after demulsification of crude oil; and the separated oil displacement has excellent degradation performance, so secondary pollution caused by incapable degradation of the separated oil displacement is avoided and environmental protection effects are obtained.

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to an environment-friendly salt-resistant and high-temperature oil-displacement agent containing biosurfactant for petrochemical industry. Background technique [0002] Petroleum is an important energy resource in production and life. With the continuous exploitation of petroleum, most oil fields have entered a period of high water content, low permeability, heavy oil, high temperature, and high salinity. Most of the remaining oil reservoirs are distributed in extremely heterogeneous carbonate In places where mining is difficult such as fractured caves, effective and reliable mining cannot be carried out using traditional oil displacement agents. Although some scholars have developed a series of new surfactants for oil extraction, there are still problems such as large usage and inability to degrade oil displacement agents. Contents of the invention [0003] The object of the pres...

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Problems solved by technology

[0002] Petroleum is an important energy resource in production and life. With the continuous exploitation of petroleum, most oil fields have entered a period of high water content, low permeability, heavy oil, high temperature, and high salinity. Most of the remaining oil reservoirs are distributed in extremely heterogeneous carbonate In places where mining is difficult such as fractured caves, it is impossible to use traditional oil displacement agents for effective and reliable mining.

Although some scholars have developed a series of new surfactants for oil extraction, there are still problems such as a large amount of use and the inability of the oil displacement agent to degrade.

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