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Use of polystyrene sulfonate in reinforced oil production

A polystyrene sulfonate, enhanced oil recovery technology, applied in drilling equipment and other directions, can solve the problems of changing the hydrophobicity of the lipophilic surface, high cost of chemical agents, troublesome treatment, and increased negative charge on the hydrophilic and lipophilic surfaces. The effect of changing the electrical properties of the solid surface, inhibiting adsorption, and reducing the amount of adsorption

Inactive Publication Date: 2005-04-13
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of purposes of polystyrene sulfonate in enhanced oil recovery, be used for overcoming above-mentioned problem that the cost of chemical agent used as sacrificial agent is high and troublesome, to effectively improve solid surface (rock mineral, adsorption solids such as agents) to improve the wettability of the solid surface, increase the negative charge of the hydrophilic and lipophilic surfaces, change the hydrophobicity of the lipophilic surfaces, and reduce the anionic surfactant-based chemical agents. Adsorption loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Changes in the electrical properties of a solid surface:

[0016] Weigh 1 gram of deoiled oil sand, add 10ml of distilled water as a blank control, and prepare the molecular weight of 7×10 4 , 1.25×10 5 , 1×10 6 Add 10ml of polystyrene sulfonate aqueous solution to 1 gram of oil sand respectively, put them into conical flasks, shake in a constant temperature water bath at 40°C for 15 hours, measure Zeta potential, and determine the potential change on the surface after solid adsorption. The results show After the polystyrene sulfonate is adsorbed on the solid surface, the charge is greatly increased, and the electric properties are all negative in varying degrees. The measurement results are shown in Table 1.

[0017] example

Embodiment 2

[0019] Changes in the electrical properties of a solid surface:

[0020] Weigh 1 gram of silica gel, add 10ml of distilled water as a blank control, and configure the molecular weight to be 7×10 4 , 1.25×10 5 , 1×10 6 Add 10ml of polystyrene sulfonate aqueous solution to 1 gram of silica gel respectively, put it into a conical flask, shake it in a constant temperature water bath at 40°C for 15 hours, measure the Zeta potential, and determine the potential change on the surface of the solid after adsorption. The result shows that the solid surface After adsorbing polystyrene sulfonate, the charge increases, and the electric properties all show negative charges to varying degrees. The measurement results are shown in Table 2.

[0021] example

Embodiment 3

[0023] Changes in the electrical properties of a solid surface:

[0024] Weigh 1 gram of synthetic trimethylated silica gel as a surface hydrophobic solid, add 10ml of distilled water as a blank control, and configure the molecular weight to be 7×10 4 , 1.25×10 5 , 1×10 6 Add 10ml of polystyrene sulfonate aqueous solution to 1 gram of trimethylated silica gel respectively, put it into a conical flask, shake it in a constant temperature water bath at 40°C for 15 hours, measure the Zeta potential, and determine the potential change on the surface of the solid after adsorption. The results showed that after the adsorption of polystyrene sulfonate on the solid surface, the charge increased, and the electric properties showed negative charge in different degrees. The results show increased negativity of the hydrophobic solid surface. The measurement results are shown in Table 3.

[0025] example

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PUM

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Abstract

The present invention belongs to the field of pretrochemical industry and is especially the use of polystyrene sulfonate as sacrificial agent in tertiary petroleum production. The water solution of polystyrene sulfonate and alkylbenzene sulfonate or petroleum sulfonate is used in tertiary petroleum production; and in the water solution, the concentration of polystyrene sulfonate as sacrificial agent is 0.01-5 wt% and that of alkylbenzene sulfonate or petroleum sulfonate is 0.02-6 wt%. Polystyrene sulfonate may be prepared with waste polystyrene and the addition of polystyrene sulfonate can alter the surface electric performance of solid and reduce the adsorption of alkylbenzene sulfonate as surfactant.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and particularly relates to the use of polystyrene sulfonate used as a sacrificial agent in enhanced oil recovery as a chemical additive for tertiary oil recovery. Background technique [0002] Polystyrene is synthesized from ethylene and benzene produced by the petrochemical industry and then polymerized. It is used in various fields of the national economy. Due to the aging of materials or disposable foam plastics, it becomes waste, which causes environmental pollution. Pollution, as oil resources are depleting day by day, tertiary oil recovery technology is widely used to enhance oil recovery, using waste petroleum products to prepare oil recovery chemical agents for reinjection oil recovery, which can recycle oil resources and reduce environmental pollution. [0003] Polystyrene sulfonate is widely used as a stabilizer for drilling mud, but it has not been used as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
Inventor 崔国柱俞稼镛赵濉
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI