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Reducing viscosity agent by emulsification for thick oil and application method thereof

A technology for emulsifying viscosity-reducing and heavy oil, which is applied in the direction of drilling equipment, etc. It can solve the problems that emulsifying viscosity-reducing agent cannot be used and the production cost of surfactant is high, and achieves the effect of strong resistance to mineral salt and high viscosity-reducing rate

Inactive Publication Date: 2004-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The production cost of all the above-mentioned surfactants is relatively high, and the resistance to mineral salts is generally less than 7000mg / L. When the concentration of calcium and magnesium ions in the formation water is higher, the above-mentioned emulsifying viscosity reducers cannot be used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Take by weighing 0.1g average molecular weight is 10000 petroleum sulfonate formaldehyde condensate (PF200A, Huiyuan synthetic agent factory), 0.4g nonylphenol polyoxyethylene ether (21) carboxylate (XS-2, Beijing Xingpu new product Development Center) and 43g of high salinity hard water (total salinity 200,000mg / l, of which the concentration of calcium and magnesium ions is 20,000mg / l), stir well and add to 100g (viscosity at 50°C is 21,060mPa.s) Xinjiang Tahe super thick In the crude oil, after stirring at 50°C for 5 minutes, the viscosity of the emulsified heavy oil was measured with a Haake VT550 rotary viscometer (100 rpm). The test results are shown in Table 1.

example 2

[0024] Take by weighing 1g average molecular weight is 8000 petroleum sulfonate formaldehyde condensate (PF200A, Huiyuan Synthetic Agent Factory), 3g nonylphenol polyoxyethylene ether (3) phosphate ester salt (Beijing Sunshine Fine Chemical Technology Research Institute), 0.04g Sodium hydroxide, add 10g water and dissolve it, then add 33g high salinity hard water (total salinity 200000mg / l, wherein the concentration of calcium and magnesium ions is 20000mg / l) to dilute, the diluted solution is added to 100g (50 ℃ viscosity is 643000mPa.s) Xinjiang Tahe ultra-heavy crude oil, after stirring at 50 ℃ for 5 minutes, the viscosity of the emulsified heavy oil was measured with a Haake VT550 rotational viscometer (100 rpm). The test results are shown in Table 1.

example 3

[0026] Take by weighing 100g of Liaohe Oilfield ultra-thick crude oil with a viscosity of 23370mPa.s at 50°C, 0.2g sodium lignosulfonate (Beijing Dyestuff Factory), 0.3g lauryl alcohol polyoxyethylene (40) ether sulfonate (Beijing Xinghua Chemical Co., Ltd. Puxin Product Development Center), 43g of high salinity hard water (total salinity 200000mg / l, wherein the concentration of calcium and magnesium ions is 20000mg / l), after stirring for 5 minutes at 50°C, the Haake VT550 rotational viscometer (100 rpm / min) to test the viscosity of the emulsified heavy oil, and the test results are shown in Table 1.

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Abstract

A viscous crude emulsion thinner comprises, (1) anionic surface active agent selected from petroleum sulfonate formaldehyde condensate and lignin sulfonate, (2) non-ionic-negative ionic surface active agent selected from non-ionic-phosphate salt, selected from non-ionic-sulfuric salt, non-ionic-carboxylate and non-ionic-petroleum sulfonate and (3) water, wherein the weight ratio of anionic surface active agent and non-ionic-negative ionic surface active agent is 1:0.2-10, the water content is 0.5-9 times of the total surface active agent content. The viscous crude emulsion thinner possesses the advantages of ore salt resistance capability and high viscosity reduction rate.

Description

technical field [0001] The invention relates to an emulsified viscosity reducer used in crude oil exploitation and transportation and its application method. technical background [0002] Degassed crude oil with a viscosity exceeding 100mPa.s at 50°C is called heavy oil. Because heavy oil contains a large amount of colloids and asphaltenes, thermal recovery techniques such as steam huff and puff and steam flooding are commonly used for recovery. However, when the viscosity of the heavy oil is too high or the oil layer is too deep, it is necessary to use the emulsification viscosity reduction method to improve the oil displacement efficiency of steam flooding and steam stimulation. That is, the viscosity is reduced by emulsification and dispersion, that is, a viscosity reducer is added to make the crude oil form a low-viscosity oil-in-water emulsion, which is convenient for normal mining. In addition, this viscosity reducer can also be added to the produced heavy oil to ach...

Claims

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Application Information

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Inventor 秦冰彭朴
Owner CHINA PETROLEUM & CHEM CORP
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