Surfactant with low surface and interface tension and high contact angle and preparation method thereof

A surfactant and co-surfactant technology, which is applied in the field of low surface interfacial tension and high contact angle oilfield chemical additives and its preparation, can solve the problem of single well productivity decline, high development cost, and low permeability reservoirs Poor permeability and other problems, to achieve low interfacial tension and reduce the effect of oil-water interfacial tension

Inactive Publication Date: 2018-11-23
SHOUGUANG XINHAI ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The poor permeability of low-permeability reservoirs makes it difficult or even impossible to flow back the well fluid that invades the reservoir, resulting in water lock damage
Researches at home and abroad have shown that water lock damage is the most important and serious damage type in low-permeability reservoirs, and the damage rate is generally 70-90%. increase mining efficiency and increase development costs
On the one hand, there are complex conditions such as high temperature and high salinity in the underground, and the existing w

Method used

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  • Surfactant with low surface and interface tension and high contact angle and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0023] This embodiment provides a low surface and interfacial tension high contact angle surfactant, which comprises the following components in parts by weight: 20 parts of perfluoroalkyl polyoxyethylene ether, 50 parts of OP-10, polyallyl trimethyl 50 parts of ammonium chloride, 50 parts of methanol.

[0024] The preparation method of the low surface interfacial tension high contact angle surfactant of the present embodiment comprises the following steps:

[0025] Take polyallyltrimethylammonium chloride polymer and add co-surfactant, stir evenly, add perfluoroalkyl polyoxyethylene ether, OP-10 and continue stirring, then add 50 parts by weight of water and stir until uniform, that is have to.

Embodiment 2

[0027] This embodiment provides a low surface and interfacial tension high contact angle surfactant, which comprises the following components in parts by weight: 15 parts of perfluoroalkyl polyoxyethylene ether, 60 parts of OP-10, polyallyl trimethyl 40 parts of ammonium chloride, 60 parts of ethanol.

[0028] The preparation method of the low surface interfacial tension high contact angle surfactant of the present embodiment comprises the following steps:

[0029] Take polyallyltrimethylammonium chloride polymer and add co-surfactant, stir evenly, add perfluoroalkyl polyoxyethylene ether, OP-10 and continue stirring, then add 40 parts by weight of water and stir until uniform, that is have to.

Embodiment 3

[0031] This embodiment provides a low surface and interfacial tension high contact angle surfactant, which comprises the following components in parts by weight: 25 parts of perfluoroalkyl polyoxyethylene ether, 40 parts of OP-10, polyquaternium-7 60 parts, 40 parts of n-propanol.

[0032] The preparation method of the low surface interfacial tension high contact angle surfactant of the present embodiment comprises the following steps:

[0033] Take polyquaternium-7 high polymer, add co-surfactant, stir evenly, add perfluoroalkyl polyoxyethylene ether, OP-10 and continue stirring, then add 60 parts by weight of water and stir until uniform, to obtain.

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Abstract

The invention discloses a surfactant with low surface and interface tension and a high contact angle and a preparation method thereof, and belongs to the technical field of surfactants. The surfactantwith the low surface and interface tension and the high contact angle is prepared from the following components in parts by weight: 15-25 parts of a fluorocarbon surfactant, 40-60 parts of alkylphenol polyoxyethylene, 40-60 parts of polyquaternary ammonium salt high polymer and 40-60 parts of a cosurfactant. By means of the water unblocking agent (surfactant with the low surface and interface tension and the high contact angle) provided by the invention, surface tension and interface tension of a solution can be effectively reduced, a contact angle is increased, moreover, the temperature resistance performance is good, the stability is good, and water blocking damage of a low-porosity low-permeability reservoir can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of surfactants, in particular to a surfactant for oilfield chemical additives with low surface interfacial tension and high contact angle and a preparation method thereof. Background technique [0002] During drilling, completion, workover and production operations, foreign phases often remain in porous media. Another immiscible phase infiltrates into the reservoir, or the saturation of the original immiscible phase in the porous medium increases, which will damage the relative permeability, so that both the reservoir permeability and the relative permeability of oil and gas are significantly reduced. When the immiscible phase is aqueous, this phenomenon is called water lock-in. The water-locking effect will produce water-locking damage, that is, the damage caused by water immersion into the oil layer during oil well operation. Water immersion will increase the water saturation near the wellbore, increase ...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/035
CPCC09K8/035C09K8/584
Inventor 王卫信杨文水王卫忠陈晓双
Owner SHOUGUANG XINHAI ENERGY TECH CO LTD
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