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Preparation method of surfactant for oil displacement

A surfactant and oil displacement technology, applied in the field of surfactant preparation, can solve the problems of inability to effectively improve oil recovery, poor compatibility of surfactants, large interfacial tension, etc., and achieve good emulsification and viscosity reduction effect, The effect of improving oil displacement efficiency and low interfacial tension

Inactive Publication Date: 2021-01-22
张军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the currently commercially available surfactants for oil displacement can play a certain role in oil displacement, their interfacial tension is relatively large. When they are used in the field of oil recovery, they cannot effectively improve the oil recovery rate and increase the oil recovery. the cost of
In addition, it may cause damage to the formation, and its compatibility with other surfactants is relatively poor

Method used

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  • Preparation method of surfactant for oil displacement
  • Preparation method of surfactant for oil displacement
  • Preparation method of surfactant for oil displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of surfactant for oil displacement, comprising the following steps:

[0034] S1. After measuring the raw material A and raw material B by a floor scale according to a certain ratio, the raw material A with a lower viscosity is first transported to the preparation tank V101 through the raw material feeding pump P101, and then the raw material B with a slightly higher viscosity is transported to the preparation tank In V101, when the liquid level in the tank reaches 45%, start the agitator, and when the material liquid level reaches the highest liquid level in the mixing tank V101, continue stirring for 25 minutes for standby;

[0035] S2. Calculate the relationship between the liquid level and weight of the dissolution tank according to the volume and height of the dissolution tank; then open the inlet pipeline valve of the mineralized water in the dissolution tank V102, start the deep well water submersible pump, and pump the mineralized water into t...

Embodiment 2

[0050] A preparation method of surfactant for oil displacement, comprising the following steps:

[0051] S1. After measuring the raw material A and raw material B by a floor scale according to a certain ratio, the raw material A with a lower viscosity is first transported to the preparation tank V101 through the raw material feeding pump P101, and then the raw material B with a slightly higher viscosity is transported to the preparation tank In V101, when the liquid level in the tank reaches 50%, start the agitator, and when the material liquid level reaches the highest liquid level in the mixing tank V101, continue stirring for 30 minutes for standby;

[0052] S2. Calculate the relationship between the liquid level and weight of the dissolution tank according to the volume and height of the dissolution tank; then open the inlet pipeline valve of the mineralized water in the dissolution tank V102, start the deep well water submersible pump, and pump the mineralized water into t...

Embodiment 3

[0067] A preparation method of surfactant for oil displacement, comprising the following steps:

[0068] S1. After measuring the raw material A and raw material B by a floor scale according to a certain ratio, the raw material A with a lower viscosity is first transported to the preparation tank V101 through the raw material feeding pump P101, and then the raw material B with a slightly higher viscosity is transported to the preparation tank In V101, when the liquid level in the tank reaches 55%, start the agitator, and when the material liquid level reaches the highest liquid level in the mixing tank V101, continue stirring for 35 minutes for standby;

[0069] S2. Calculate the relationship between the liquid level and weight of the dissolution tank according to the volume and height of the dissolution tank; then open the inlet pipeline valve of the mineralized water in the dissolution tank V102, start the deep well water submersible pump, and pump the mineralized water into t...

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Abstract

The invention relates to the technical field of surfactant preparation, in particular to a preparation method of a surfactant for oil displacement. The prepared surfactant for oil displacement has ultralow interfacial tension, and the interfacial tension reaches 1.0*10<-3> mN / m; in addition, the oil displacement efficiency can be effectively improved, and the oil extraction cost is effectively reduced; furthermore, the surfactant for oil displacement prepared by the invention has a good emulsifying and viscosity-reducing effect on crude oil, especially thickened oil, and the crude oil can be dispersed in a surfactant solution in a fine powder form to form an oil-in-water emulsion, so that the viscosity of the crude oil can be reduced by more than 80%; the surfactant is non-toxic, does notdamage the stratum, has good compatibility, can be compounded with other chemical oil displacement agents, and improves the recovery rate of crude oil; therefore, the surfactant product for oil displacement prepared by the invention has a wider market prospect and is more suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of surfactant preparation, in particular to a preparation method of a surfactant for oil displacement. Background technique [0002] Surfactant refers to a substance that can significantly change the interface state of its solution system by adding a small amount. With fixed hydrophilic and lipophilic groups, it can be aligned on the surface of the solution. The molecular structure of surfactants has amphiphilicity: one end is a hydrophilic group, and the other end is a hydrophobic group; the hydrophilic group is often a polar group, such as carboxylic acid, sulfonic acid, sulfuric acid, amino group or amino group and Its salt, hydroxyl group, amide group, ether bond, etc. can also be used as polar hydrophilic groups; while hydrophobic groups are often non-polar hydrocarbon chains, such as hydrocarbon chains with more than 8 carbon atoms. Surfactants are divided into ionic surfactants (including cationic s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07D213/803
CPCC07D213/803C09K8/584
Inventor 张军
Owner 张军
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