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Synthesis of aliphatic alcohol polyoxyethylene sulfonate and complex formulation used for tertiary oil recovery displacement agent

A technology of alcohol polyoxyethylene ether sulfonate and alcohol polyoxyethylene ether, which is applied in the field of chemical oil displacement agents, can solve problems such as damage, and achieve the effect of enhancing oil recovery

Inactive Publication Date: 2008-09-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large amount of alkali contained in it has caused great damage to the oil layers and oil wells near the oil field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: the synthesis of fatty alcohol polyoxyethylene ether sulfonate

[0031] 1mol fatty alcohol polyoxyethylene ether sulfate (70%) 600g, 900g water, 1.4mol Na 2 SO 3 176.4g, 2.5g cupric chloride and 2.5g manganese chloride were placed in a reaction kettle, reacted at 165-170°C for 4 hours, took it out after cooling, removed 700g of water by distillation under reduced pressure, added 2000g of isopropanol to the mixture, After standing overnight, the precipitated inorganic salt was filtered off, and the solvent was evaporated to obtain 450 g of the finished product. By two-phase titration, the content of fatty alcohol polyoxyethylene ether sulfonate was 87%.

Embodiment 2

[0032] Embodiment 2: the synthesis of fatty alcohol polyoxyethylene ether sulfonate

[0033] With 1mol fatty alcohol polyoxyethylene ether sulfate (70%) 600g, 900g water, 1.3mol NaHSO 3 135.2g, 2.5g titanium chloride, and 2.5g zinc chloride were placed in a reaction kettle, reacted at 155-160°C for 4 hours, taken out after cooling, 700g of water was removed by distillation under reduced pressure, and 2000g of isopropanol was added to the mixture. After standing overnight, the precipitated inorganic salt was filtered off, and the solvent was evaporated to obtain 440 g of the finished product. By two-phase titration, the content of fatty alcohol polyoxyethylene ether sulfonate was 85%.

Embodiment 3

[0034] Embodiment 3: the synthesis of fatty alcohol polyoxyethylene ether sulfonate

[0035] 1mol fatty alcohol polyoxyethylene ether sulfate (70%) 600g, 900g water, 1.5mol Na 2 SO 3 189g, 2.5g of titanium chloride, and 2.5g of vanadium chloride were placed in a reaction kettle and reacted at 160-165°C for 4 hours. After cooling, they were taken out, and 700g of water was removed by distillation under reduced pressure. 2000g of isopropanol was added to the mixture. Leave it overnight, filter off the precipitated inorganic salt, and evaporate the solvent to obtain 455 g of the finished product. By two-phase titration, the content of fatty alcohol polyoxyethylene ether sulfonate was 89%.

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PUM

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Abstract

The invention relates to synthesis of polyoxyethylene fatty alcohol ether sulphonate, and complex formulation for tertiary oil recovery displacement agent, and belongs to chemical displacement agent technic field. The invention discloses a synthesis method of a surface active agent for tertiary oil recovery for a high-temperature, high salinity and high calcium and magnesium ion oil reservoir, and complex formulation for highly effective displacement agents. Polyoxyethylene fatty alcohol ether sulphate is reacted with a sulfonating agent under the action of catalyst to produce polyoxyethylene fatty alcohol ether sulphonate. Polyoxyethylene fatty alcohol ether sulphonate are used as main material which is complex formulated with heavy alkyl benzene sulfonate, water, polymerisate, etc. Compared with existing products, the displacement agent of the invention in the three-high system reduces the oil-water boundary tension ultra-low (10<-3>mN / m), and the boundary tension is not affected by temperature, degree of mineralization and the concentration of calcium and magnesium ions.

Description

technical field [0001] The invention discloses the synthesis of fatty alcohol polyoxyethylene ether sulfonate and its compounding for tertiary oil recovery oil displacement agent, belonging to the technical field of chemical oil displacement agent. The prepared fatty alcohol polyoxyethylene ether sulfonate is applied to the compounding of high-efficiency oil displacement agents for tertiary oil recovery in three-high (high temperature, high salinity, high calcium and magnesium ions) reservoirs, and improves the efficiency of "three high" reservoirs. Crude Oil Recovery. Background technique [0002] Since the first oil crisis in the 1970s, countries all over the world have attached great importance to the research of enhanced oil recovery. ASP flooding is a method commonly used in various oil fields to enhance oil recovery. Ternary complex system is surfactant, polymer and alkali system. However, the large amount of alkali contained in it has caused great damage to the oil...

Claims

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Application Information

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IPC IPC(8): C07C309/62C07C309/10C07C303/02C09K8/584
Inventor 王建新李立勇孙培冬周忠
Owner JIANGNAN UNIV
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