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Emulsifying and viscosity-decreasing method of thick oil

A technology for emulsifying viscosity-reducing, heavy oil, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve problems such as inapplicability, achieve strong mineral salt resistance, low viscosity of heavy oil, emulsification moderate cost effect

Active Publication Date: 2013-01-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has high salt resistance performance, the compound is still not suitable for ultra-heavy oil with a viscosity greater than 100,000mPa.s at 50°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 0.05g of 2-nonylnaphthalenesulfonic acid, dissolve it in 0.8g of n-pentane, and make A agent. Weigh 0.08g octylphenol polyoxyethylene ether sulfonate (RP(5)-1D, Beijing Xingpu New Product Development Center), 0.013g polydimethyldiallylammonium chloride (molecular weight 250000, Beijing Lin Huashui Stabilizer Factory) was dissolved in 4.24g of formation water with a total salinity of 45000mg / L to make B agent aqueous solution. Weigh 10g of Xinjiang Tahe super-thick crude oil with a viscosity of 180000mPa.s at 60°C, mix it evenly with agent A, then add the aqueous solution of agent B, stir at 60°C for 2 minutes to form a stable oil-in-water emulsion, and measure the emulsion Viscosity, the results are shown in Table 1.

Embodiment 2

[0053] Weigh 0.05g of eicosylnaphthalene with a molecular weight of 5000, dissolve it in 1.5g of cyclohexane, and make A agent. Weigh 0.12g nonylphenol polyoxyethylene ether carboxylate (RP(5)-1A, Beijing Xingpu New Product Development Center), 0.05g sodium polyacrylate (molecular weight 350000, Beijing Linhua Water Stabilizer Factory), dissolve Mix 4.2 g of formation water with a total salinity of 100,000 mg / L to prepare an aqueous solution of agent B. Weigh 10g of Xinjiang Tahe super-thick crude oil with a viscosity of 150000mPa.s at 70°C, mix it evenly with agent A, then add the aqueous solution of agent B, and stir at 70°C for 2 minutes to form a stable oil-in-water oil-water emulsion. Liquid viscosity, the results are shown in Table 1.

Embodiment 3

[0055] Weigh 0.06g of polymethacrylate with a molecular weight of 2000, dissolve it in 1.0g of xylene, and prepare Agent A. Weigh 0.08g fatty alcohol polyoxyethylene ether sulfonate (RP(5)-2B, Beijing Xingpu New Product Development Center), 0.003g xanthan gum (molecular weight 250000, Shengli Oilfield Auxiliary Factory), dissolve in 4.23g Formation water with a total salinity of 60,000 mg / L is formulated as agent B aqueous solution. Weigh 10g of Shengli ultra-thick crude oil with a viscosity of 93000mPa.s at 50°C, mix it with agent A evenly, then add the aqueous solution of agent B, stir at 50°C for 2 minutes, and form a stable oil-in-water oil-water emulsion, measure the viscosity of the emulsion , the results are shown in Table 1.

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Abstract

The invention relates to an emulsifying and viscosity-decreasing method of thick oil. The method comprises the following steps: mixing oil-soluble component with hydrocarbon solvent to prepare an agent A; mixing nonionic-anionic surfactant, straight chain or branched chain macromolecular compound containing hydrophilic groups with water to prepare an agent B; firstly mixing the agent A with thick oil, secondly adding the agent B in the mixture of the agent A and thick oil and mixing to form an oil-in-water emulsion. The method can be used for the emulsifying and viscosity-decreasing of thick oil and especially for the emulsifying and viscosity-decreasing of thick oil under the condition of ultrahigh rock salt formation.

Description

technical field [0001] The invention relates to a method for emulsifying and reducing the viscosity of heavy oil. 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 formula to reduce the amount of additional 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 cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C09K8/58
Inventor 秦冰罗咏涛李本高
Owner CHINA PETROLEUM & CHEM CORP
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