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Viscosity-reducing and drainage-aiding composition for heavy oil, viscosity-reducing and drainage-aiding agent, preparation method and application

A drainage aid and composition technology, which is applied in drilling compositions, chemical instruments and methods, and earthwork drilling and mining, and can solve problems such as poor surface activity, ineffective emulsification and viscosity reduction, and insufficient temperature resistance. , to achieve good viscosity reduction effect, increase water recovery rate, and low surface and interfacial tension

Active Publication Date: 2019-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrocarbon surfactants have the following problems: 1) poor surface activity, at most the surface tension of water is reduced to 27mN m -1 Left and right; 2) Almost ineffective in acidic environment, good surface activity in alkaline environment; 3) Insufficient temperature resistance
The anti-swelling aid-drainage agent can inhibit the hydration expansion of clay minerals in the reservoir and help the heavy oil to be discharged from the ground, but its emulsification and viscosity-reducing effect is not obvious, and the drainage-aiding performance needs to be further improved

Method used

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  • Viscosity-reducing and drainage-aiding composition for heavy oil, viscosity-reducing and drainage-aiding agent, preparation method and application
  • Viscosity-reducing and drainage-aiding composition for heavy oil, viscosity-reducing and drainage-aiding agent, preparation method and application
  • Viscosity-reducing and drainage-aiding composition for heavy oil, viscosity-reducing and drainage-aiding agent, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Viscosity-reducing and drainage-aiding composition for heavy oil, consisting of the following components in parts by mass: 0.1 part of FC-01 fluorocarbon surfactant, 0.5 part of AOS (sodium α-alkenyl sulfonate, purchased from Sinolight Chemical Co., Ltd.) parts, 0.25 parts of ethanol, and 0.05 parts of F370 drainage aid.

[0027] Viscosity-reducing and drainage-aiding agent for heavy oil, the composition per 100 parts by mass is: 0.1 part of FC-01 fluorocarbon surfactant, 0.5 part of AOS, 0.25 part of ethanol, 0.05 part of F370 drainage aid, and the balance is water.

[0028] The preparation steps of the above-mentioned viscosity-reducing and drainage-aiding agent are as follows: accurately take each component according to the parts by mass, and mix them uniformly to obtain the product.

[0029] The application of the above-mentioned viscosity-lowering and drainage-aiding agent is as follows: inject the viscosity-lowering and drainage-aiding agent with steam into a heav...

Embodiment 2

[0031] The thick oil viscosity reducing and drainage aid composition is composed of the following components in parts by mass: 0.5 part of FC-02 fluorocarbon surfactant, 0.6 part of SYHSY, 0.3 part of urea, and 0.1 part of F633 drainage aid.

[0032] Viscosity-reducing and drainage-aiding agent for heavy oil, the composition per 100 parts by mass is: 0.5 part of FC-02 fluorocarbon surfactant, 0.6 part of SYHSY, 0.3 part of urea, 0.1 part of F633 drainage aid, and the balance is water. Its preparation steps are with embodiment 1.

[0033] The application of the above-mentioned viscosity-reducing and drainage-aiding agent is specifically: injecting the viscosity-reducing and drainage-aiding agent into a certain heavy oil reservoir with steam according to the mass ratio of 1:6, and contacting at a temperature of 200°C for 2 hours, and the subsequent operations are the same as in Example 1.

Embodiment 3

[0035] The thick oil viscosity reducing and drainage aid composition is composed of the following components in parts by mass: 0.2 parts of FC-04-1 fluorocarbon surfactant, 0.7 parts of SDBS, 0.4 parts of ethanol, and 0.1 part of SH6 drainage aid.

[0036] Viscosity-reducing and drainage-aiding agent for heavy oil, the composition per 100 parts by mass is: 0.2 part of FC-04-1 fluorocarbon surfactant, 0.7 part of SDBS, 0.4 part of ethanol, 0.1 part of SH6 drainage aid, and the balance is water. Its preparation steps are with embodiment 1.

[0037] The application of the above-mentioned viscosity-reducing and drainage-aiding agent is specifically: injecting the viscosity-reducing and drainage-aiding agent into a certain heavy oil reservoir with steam according to the mass ratio of 1.8:7, contacting at a temperature of 200°C for 2 hours, and the subsequent operations are the same as in Example 1.

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Abstract

The invention discloses a viscosity-reducing and cleanup composition for thickened oil, and a viscosity-reducing and cleanup additive and a preparation method and application thereof, belonging to the technical field of oil exploitation. The viscosity-reducing and cleanup composition comprises, by mass, 0.1 to 2 parts of a fluorocarbon surfactant, 0.5 to 1 part of a hydrocarbon surfactant, 0.25 to 1 part of an auxiliary agent and 0.05 to 0.3 part of the cleanup additive, wherein the fluorocarbon surfactant is one or more selected from a group consisting of FC-01, FC-02, FC-04-1, FC-06, FC-08 and FC-11; the hydrocarbon surfactant is one or more selected from a group consisting of sodium alpha-olefin sulfonate, SYHSY, SDBS and YN; and the cleanup additive is one or more selected from a group consisting of F370, F633 and SH6. The viscosity-reducing and cleanup composition has low surface and interfacial tension, can effectively reduce the dynamic viscosity of thickened oil, improves surface wettability of a rock core and enhances water recovery rate.

Description

technical field [0001] The invention relates to a heavy oil viscosity-reducing and drainage-aiding composition, and also relates to a viscosity-reducing and drainage-aiding agent containing the composition, a preparation method and application thereof, and belongs to the technical field of petroleum exploitation. Background technique [0002] The most prominent features of heavy oil are high colloidal asphaltene content, high viscosity, and poor fluidity. Therefore, the key to heavy oil production is to reduce viscosity and improve fluidity. At present, thermal recovery technologies such as steam huff and puff and steam flooding are mainly used in the exploitation of ultra-heavy oil in my country. However, in the later stage of huff and puff, problems such as lower oil-gas ratio, higher crude oil viscosity, and difficulty in wellbore lifting often occur in steam injection production, which seriously restrict the deep development of heavy oil reservoirs. As we all know, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584E21B43/22
Inventor 陈慧卿杨军虎王孟江李飞鹏常国栋王剑郝春雷先花
Owner CHINA PETROLEUM & CHEM CORP
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