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Viscous oil emulsification and viscosity reduction agent

A technology for emulsifying viscosity-reducing and heavy oil, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of no reports, etc., and achieve the effects of moderate emulsification cost, strong resistance to mineral salt, and low viscosity of heavy oil

Active Publication Date: 2013-01-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are very few emulsified viscosity reducers for heavy oil under such high salinity conditions on the market, and there is no report on the emulsified viscosity reducer for heavy oil with asphaltene content exceeding 30%.

Method used

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  • Viscous oil emulsification and viscosity reduction agent
  • Viscous oil emulsification and viscosity reduction agent

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Taking by weighing 80 DEG C of viscosity is 73000mPa.s, asphaltenes content is 34.47% by weight of Xinjiang Tahe super thick crude oil 100g, with 0.05g average molecular weight is 10000 petroleum sulfonate condensate (PF200A, Huiyuan synthetic agent factory product), 0.7g nonylphenol ethoxylate (10) carboxylate dimer, wherein Y is -(CH 2 ) 2-, 0.01g n-butanol and 0.5g water are made into an emulsified viscosity reducer, diluted with 43g of high salinity hard water (total salinity 200000mg / l, wherein the concentration of calcium and magnesium ions is 20000mg / l) and then added to the above thickened In the oil, after stirring at 80°C for 5 minutes, the viscosity of the emulsified heavy oil was tested with a Hakke VT550 rotary viscometer (100 rpm). The test results are shown in Table 1.

example 2

[0036] Taking by weighing 80 ℃ of viscosity is 640880mPa.s, asphaltene content is 38.87% by weight of Xinjiang Tahe super thick crude oil 100g, with 0.05g average molecular weight is sodium lignosulfonate of 1000, 1.2g nonylphenol polyoxyethylene ether ( 7) Phosphate salt dimer, wherein Y is-(CH 2 CH 2 O) 2 -, 0.01g cyclohexanol and 1.5g water are made into emulsified viscosity reducer, diluted with 66g of high salinity hard water (total salinity 200000mg / l, wherein the concentration of calcium and magnesium ions is 20000mg / l) and added to the above thickened In the oil, after stirring at 80°C for 5 minutes, the viscosity of the emulsified heavy oil was tested with a Hakke VT550 rotary viscometer (100 rpm). The test results are shown in Table 1.

example 3

[0038] Take by weighing 50 ℃ viscosity be 64160mPa.s, colloid and asphaltene content are respectively 23.9 weight % and 3.9 weight % Shengli Caoqiao heavy oil 100g, 0.01g average molecular weight is 1000 sodium lignosulfonate, 0.15g octane phenoxyethylene ether (3) sulfonate dimer, wherein Y is -S(CH 2 ) 2 S-, 0.01g ethanol, 0.2g water to make emulsified viscosity reducer, dilute with 43g high salinity hard water (total salinity 200000mg / l, in which calcium and magnesium ion concentration is 20000mg / l) and add to the above heavy oil After stirring at 50°C for 5 minutes, the viscosity of the emulsified heavy oil was tested with a Hakke VT550 rotational viscometer (100 rpm). The test results are shown in Table 1.

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Abstract

The invention relates to a viscous oil emulsification and viscosity reduction agent. The emulsification and viscosity reduction agent comprises an anionic surfactant, a nonionic-anionic Gemini surfactant, a C1-C8 alcohol and water, wherein the weight ratio of the anionic surfactant to the nonionic-anionic Gemini surfactant to the C1-C8 alcohol is 1:0.1-40:0.01-10, and the water amount is 0.2-5000 times the total weight of the anionic surfactant, the nonionic-anionic Gemini surfactant and the C1-C8 alcohol. The emulsification and viscosity reduction agent has the advantages of no alkalis, strong mineral salt resistance, realization of emulsifying ultrahigh-viscosity viscose oil having above 30% of asphaltene, low viscosity of the emulsified oil, moderate emulsification cost and the like.

Description

technical field [0001] The invention relates to a heavy oil emulsifying viscosity reducer. Background technique [0002] The emulsification viscosity reduction method is a commonly used method for mining heavy oil at present. Through the adsorption of the emulsification viscosity reducer on the oil-water interface, the oil-water interfacial tension is reduced, and the heavy oil is transformed from the water-in-oil emulsified state into the oil-in-water emulsion, which greatly reduces Viscosity, to achieve normal mining. Alkali is generally added to the emulsified viscosity reducer to reduce the amount of external surfactant, but this method is not suitable for alkali-sensitive formations. [0003] With the increase of heavy oil production depth, geological conditions become increasingly complex. The use effect of emulsified viscosity reducer is usually also affected by the salinity of formation water, especially when the concentration of calcium and magnesium ions in water...

Claims

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Application Information

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IPC IPC(8): C09K8/584
Inventor 秦冰罗咏涛李本高
Owner CHINA PETROLEUM & CHEM CORP
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