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Anti-salt type thicking oil reducing viscosity agent and preparation process thereof

A heavy oil viscosity reducer, salt-type technology, applied in earth-moving drilling, fluid production, wellbore/well components, etc., can solve problems such as non-reporting

Inactive Publication Date: 2005-01-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, looking at the heavy oil viscosity reduction technology at home and abroad, it is suitable for formation water with a salt content as high as 2.0×10 5 mg / L salt-tolerant viscosity reducer for special heavy oil reservoirs, but no report

Method used

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  • Anti-salt type thicking oil reducing viscosity agent and preparation process thereof
  • Anti-salt type thicking oil reducing viscosity agent and preparation process thereof
  • Anti-salt type thicking oil reducing viscosity agent and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Mainly explain the preparation of polyoxyethylene nonylphenol ether hydroxypropanesulfonate sodium-15.

[0024] Add 0.1 mol of polyoxyethylene nonylphenol ether-15 to the three-necked flask, and then add 1.2 g of tin tetrachloride, heat the oil bath to 100°C, and drop 0.15 mol of epichlorohydrin from the funnel while stirring. After dripping the epichlorohydrin, react for 0.5 hour to obtain the intermediate product polyoxyethylene ether chlorohydroxypropane-15. Add 0.11 mol of sodium hydroxide to the above product and react at 70°C for 0.5 hour to obtain the intermediate product polyoxyethylene ether propylene oxide-15. Finally, 0.2 mol of sodium bisulfite and 0.1 mol of sodium sulfite were added, and the temperature was raised to 140° C. for 4 hours to obtain polyoxyethylene nonylphenol ether hydroxypropanesulfonate sodium-15 with a total yield of 65%. Add 3 times the mass of water to make thick oil viscosity reducer 1.

Embodiment 2

[0026] Use polyoxyethylene nonylphenol ether-8 as a raw material, add 0.1mol polyoxyethylene nonylphenol ether-8 into a three-necked flask, then add 1.2g of tin tetrachloride, heat the oil bath to 100°C, and while stirring Add 0.15mol epichlorohydrin dropwise into the funnel. After dripping the epichlorohydrin, react for 0.5 hour to obtain the intermediate product polyoxyethylene nonylphenol ether chlorohydroxypropane-8. Add 0.11mol sodium hydroxide to the above product, and react at 70°C for 0.5 hour to obtain the intermediate product polyoxyethylene nonylphenol ether propylene oxide-8. Finally, 0.2 mol of sodium bisulfite and 0.1 mol of sodium sulfite were added, and the temperature was raised to 140° C. for 4 hours to synthesize polyoxyethylene nonylphenol ether hydroxypropanesulfonate-8, with a total yield of 67%. Add 3 times the mass of water to make thick oil viscosity reducer 2.

[0027] Features of the present invention:

[0028] By selecting polyoxyethylene ether n...

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Abstract

The invention provides a salt-resistant crude oil viscosity reductant and its preparing method, and it is polyoxyethylene ether hydroxy propanesulfonate synthesized by using a nonionic surfactant containing special oxyethylene chain segment as raw material and the preparing method includes 1, making polyoxyethylene ether nonionic surfactant react with epoxy chloropropane to obtain polyoxyethylene ether chlorohydroxy propane; 2, making the product in step 1 reacts with NaOH to obtain polyoxyethylene ether epoxy propane; 3, sulfonating the product in step 2 with sodium disulfite to obtain it. Its character: by selecting polyoxyethylene alkyl alcohol (phenol) ether nonionic surfactant of different oxyethylene chain segments as raw materials, it can prepare crude oil viscosity reductants of different salt resisting properties.

Description

Technical field: [0001] The invention relates to an oilfield chemical agent, especially a salt-resistant heavy oil viscosity reducer and a preparation method thereof. Background technique: [0002] Heavy oil is a type of crude oil with high viscosity and high colloid and asphaltene content. Due to the thick oil, the load of the pumping unit is large, the power consumption is high, and the mechanical accidents are frequent. Therefore, the key to the development of heavy oil is to reduce the viscosity and improve the fluidity. At present, the wellbore viscosity reduction methods of heavy oil wells proposed at home and abroad mainly include thermal methods (including heating cables, electric heating sucker rods, heat conduction oil heating methods, etc.), light oil dilution methods, emulsification viscosity reduction methods, etc. Among these methods, the thermal viscosity reduction technology is relatively mature and effective, but consumes a lot of electricity and costs high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
Inventor 葛际江张贵才孙铭勤张德斌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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