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An emulsion-type self-adaptive plugging regulator suitable for high-salinity formations and its preparation method

A technology of high salinity and plugging agent, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the limitation of research and application of emulsion, unattractive industrial products, unable to play profile control and water plugging etc. to achieve the effect of reducing the remaining surface free energy, improving the emulsification effect and increasing the stability

Active Publication Date: 2018-06-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Water-in-oil emulsions have some desirable properties in themselves, however, they are not attractive for industrial products due to the difficulty in maintaining the stability of the system Or when the necessary process becomes unstable, it is also of no value
[0005] Generally speaking, both water-in-oil emulsions and oil-in-water emulsions have two problems: first, the emulsion can only be blocked once, and it will fail after breaking the emulsion
Secondly, emulsions can only be used in conventional oilfields, and cannot play the role of profile control and water shutoff in high-salt and high-salinity reservoirs, thus limiting the research and application of emulsions

Method used

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  • An emulsion-type self-adaptive plugging regulator suitable for high-salinity formations and its preparation method
  • An emulsion-type self-adaptive plugging regulator suitable for high-salinity formations and its preparation method
  • An emulsion-type self-adaptive plugging regulator suitable for high-salinity formations and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0047] An emulsion-type self-adaptive plugging regulator suitable for formations with high salinity, the plugging regulator is a water-in-oil emulsion, the plugging regulator is composed of a water phase, an oil phase and an emulsifier, wherein the oil-water ratio It is 30:20, the hydrophilic-lipophilic balance (HLB) is 6, the mass percentage of emulsifier is 2.5%, the water glass modulus of the water phase is 3.2, the water phase is an aqueous solution of sodium silicate, and the water phase of sodium silicate The mass concentration is 20%. The oil phase is white oil. The emulsifier is a mixture of Span 80 (S80) and Tween 80 (T80), and the mass percentage of Span 80 (S80) in the mixture of Span 80 (S80) and Tween 80 (T80) is 84%, and Tween The mass percentage of 80 (T80) was 16%.

[0048] Preparation:

[0049] (1) According to the proportion, add the emulsifier into the oil phase, stir for 4 minutes, and disperse evenly;

[0050] (2) Then add the water phase according to ...

Embodiment 2

[0053] An emulsion-type self-adaptive plugging regulator suitable for formations with high salinity, the plugging regulator is a water-in-oil emulsion, the plugging regulator is composed of a water phase, an oil phase and an emulsifier, wherein the oil-water ratio It is 25:25, the hydrophilic lipophilic balance value (HLB) is 6, the mass percentage of emulsifier is 1%, the water glass modulus of water phase is 3.2, and water phase is sodium silicate aqueous solution, the water phase sodium silicate The mass concentration is 20%. The oil phase is white oil. The emulsifier is a mixture of Span 80 (S80) and Tween 80 (T80), and the mass percentage of Span 80 (S80) in the mixture of Span 80 (S80) and Tween 80 (T80) is 84%, and Tween The mass percentage of 80 (T80) was 16%.

[0054] Preparation:

[0055] (1) According to the proportion, add the emulsifier into the oil phase, stir for 4 minutes, and disperse evenly;

[0056] (2) Then add the water phase according to the oil-water...

Embodiment 3

[0059] An emulsion-type self-adaptive plugging regulator suitable for formations with high salinity, the plugging regulator is a water-in-oil emulsion, the plugging regulator is composed of a water phase, an oil phase and an emulsifier, wherein the oil-water ratio It is 20:30, the hydrophilic lipophilic balance value (HLB) is 6, the mass percent of emulsifier is 0.8%, the water glass modulus of water phase is 3.2, and water phase is sodium silicate aqueous solution, the water phase sodium silicate The mass concentration is 20%. The oil phase is white oil. The emulsifier is a mixture of Span 80 (S80) and Tween 80 (T80), and the mass percentage of Span 80 (S80) in the mixture of Span 80 (S80) and Tween 80 (T80) is 84%, and Tween The mass percentage of 80 (T80) was 16%.

[0060] Preparation:

[0061] (1) According to the proportion, add the emulsifier into the oil phase, stir for 4 minutes, and disperse evenly;

[0062] (2) Then add the water phase according to the oil-water ...

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Abstract

The invention relates to an emulsion-type self-adaptive plugging regulator suitable for high salinity formations and a preparation method thereof. The plugging regulator is a water-in-oil emulsion, and the plugging regulator consists of a water phase, an oil phase and an emulsifier. Wherein, the oil-water ratio is (3-1): (1-9), the hydrophilic-lipophilic balance (HLB) is 4.5-6, the mass percentage of the emulsifier is 0.8%-2.5%, and the water glass modulus of the water phase 2.8 to 3.5. The present invention mixes emulsifiers with different HLB values ​​to form a mixed emulsifier, which can not only meet the requirements of complex systems, but also greatly improve the emulsification effect. One part of the mixed emulsifier is a water-soluble surfactant, and the other part is an oil-soluble surfactant. Surfactant, the two components are adsorbed on the interface to form a "composite", the orientation is relatively tight, and the interfacial film is a mixed film with high strength and enhanced plugging control performance.

Description

technical field [0001] The invention relates to a novel emulsion-type plugging regulating agent, in particular to an oil-in-sodium silicate emulsion, an emulsion-type adaptive plugging regulating agent suitable for high salinity formations and a preparation method thereof. Background technique [0002] Emulsions are generally formed from at least two immiscible liquid phases such that at least one phase is completely dispersed in the form of fine particles in the other phase. Emulsions are often formed by a variety of components with complex interrelationships. According to which phase contains the dispersed internal phase and which phase is the continuous external phase, the emulsion can be divided into oil-in-water or water-in-oil emulsions liquid. In this context, oil can be a substance immiscible with water and capable of forming an emulsion with water. Various emulsifiers are used to delay the separation of emulsions into component phases, and these agents may determin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508
CPCC09K8/5086
Inventor 王增宝赵修太葛丹翟东启陈泽华王全任增雷马汉卿陈文雪
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)