Surfactant compounded system with ultralow interfacial tension and preparation method of surfactant compounded system

A surfactant and interfacial tension technology, applied in chemical instruments and methods, dissolving, drilling compositions, etc., can solve the problems of difficult crude oil recovery, enhanced water sensitivity, and high dosage of alkali agents, and achieve improved crude oil recovery. Yield, good performance, low price effect

Active Publication Date: 2015-02-25
延安市永科石油工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of alkaline agent will increase the pH value, which will increase the expansion of clay minerals and enhance water sensitivity, and the interaction between petroleum sulfonate and exchangeable high-valent cations in formation water and clay will form sulfonate precipitation, which will accumulate in the formation. Scale, etc., thus causing greater damage to the formation, seriously affecting the sustainable development of oi

Method used

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  • Surfactant compounded system with ultralow interfacial tension and preparation method of surfactant compounded system
  • Surfactant compounded system with ultralow interfacial tension and preparation method of surfactant compounded system
  • Surfactant compounded system with ultralow interfacial tension and preparation method of surfactant compounded system

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Experimental program
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Effect test

Embodiment 1

[0033] A kind of ultra-low interfacial tension surfactant complex system of the present embodiment, by mass percentage, comprises 10% amphoteric surfactant, 20% nonionic surfactant polyether, 2% stabilizer secondary alkyl Sodium sulfonate, the balance is water.

[0034] Described amphoteric surfactant is dodecyl dimethyl sulfopropyl betaine, and structural formula is as follows:

[0035]

[0036] The preparation method of the low interfacial tension surfactant complex system of the present embodiment is as follows:

[0037] Under normal temperature and pressure, sequentially add amphoteric surfactant, nonionic surfactant, and stabilizer into the reaction kettle, mix well, then add water, stir well until the liquid is transparent, and the product is obtained after discharge.

[0038] Carry out performance test to present embodiment product, test condition:

[0039] 1. Test instrument: TX-500C spinning drop interfacial tensiometer;

[0040] 2. Test temperature: 60°C;

[0...

Embodiment 2

[0046] A kind of ultra-low interfacial tension surfactant composite system of the present embodiment, by mass percent, comprises 15% amphoteric surfactant, 20% nonionic surfactant alkanolamide, 3% stabilizer + Sodium dialkylsulfonate, the balance is water.

[0047] Described amphoteric surfactant is octadecyldimethylsulfopropyl betaine, and structural formula is as follows:

[0048]

[0049] The preparation method of the low interfacial tension surfactant complex system of the present embodiment is as follows:

[0050] Under normal temperature and pressure, sequentially add amphoteric surfactant, nonionic surfactant, and stabilizer into the reaction kettle, mix well, then add water, stir well until the liquid is transparent, and the product is obtained after discharge.

[0051] Carry out performance test to present embodiment product, test condition:

[0052] 1. Test instrument: TX-500C spinning drop interfacial tensiometer;

[0053] 2. Test temperature: 60°C;

[0054] ...

Embodiment 3

[0059] A kind of ultra-low interfacial tension surfactant composite system of the present embodiment, by mass percent, comprises 20% amphoteric surfactant, 20% nonionic surfactant (alkanolamide and dodecyl sulfonate sodium dodecyl sulfate mixture), 4% of the stabilizer sodium dodecyl sulfate, and the balance is water.

[0060] Described amphoteric surfactant is lauryl amidopropyl dimethylsulfopropyl betaine, and structural formula is as follows:

[0061]

[0062] The preparation method of the low interfacial tension surfactant complex system of the present embodiment is as follows:

[0063] Under normal temperature and pressure, sequentially add amphoteric surfactant, nonionic surfactant, and stabilizer into the reaction kettle, mix well, then add water, stir well until the liquid is transparent, and the product is obtained after discharge.

[0064] Carry out performance test to present embodiment product, test condition:

[0065] 1. Test instrument: TX-500C spinning drop i...

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Abstract

The invention discloses a surfactant compounded system with ultralow interfacial tension and a preparation method of the surfactant compounded system, belonging to the technical field of surfactants. The surfactant compounded system comprises the following components in percentage by mass: 10-33% of a primary surfactant, 7-23% of a synergist, 1-4% of a stabilizer and the balance of water, wherein the primary surfactant is an ampholytic surfactant, the synergist is a nonionic surfactant, and the stabilizer is an anionic surfactant. By using a small amount of the surfactant compounded system with ultralow interfacial tension, the oil-water interfacial tension reaches an order of magnitude of 10<-4>mN/m or lower within a short time; the surfactant compounded system with ultralow interfacial tension is applicable to tertiary oil recovery of a low-permeability or ultralow-permeability reservoir stratum so as to enhance oil recovery; the surfactant compounded system with ultralow interfacial tension also can be used for decompression and augmented injection of a water wall and viscosity reduction of thickened oil; the system is alkali-free and does not damage the stratum when used; the surfactant compounded system with ultralow interfacial tension can be used in industries such as a cleaning agent, an emulgator and a deinking agent; the raw materials are easily available and the system is low in price, good in performance and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of surfactants, and in particular relates to an ultra-low interfacial tension surfactant compound system and a preparation method thereof. Background technique [0002] In today's increasingly tense energy environment, enhanced oil recovery has become a major topic in oil exploration research, and research on tertiary oil recovery, especially oil recovery with surfactants, has received widespread attention. After water flooding, most of the oil stays in the thinner or narrower capillary pores, and is in a highly dispersed state, and the interfacial tension between oil and water is very high, resulting in a large pressure difference required for driving, while the water injection pressure difference is far away. It is much smaller than the driving pressure difference. Therefore, it is very difficult to increase the pressure difference alone. It is a feasible and effective method to use the surfactant to reduc...

Claims

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Application Information

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IPC IPC(8): C09K8/584B01F17/18B01F17/24B01F17/42C09K23/18C09K23/24C09K23/42
CPCC09K8/584C09K23/00
Inventor 沈一丁马国艳王磊
Owner 延安市永科石油工程技术服务有限公司
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