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A low-temperature oil well early-strength cementing agent

An oil well, low temperature technology, applied in the field of oilfield chemicals, to achieve the effect of reducing surface tension, small shrinkage, and promoting the speed of cement hydration

Active Publication Date: 2017-09-22
山东聚鑫新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (ZL200710190542.X) publicly authorized a kind of early strength agent for concrete cement slurry, but unfortunately it used components such as inorganic sodium chloride, sulfate and sodium nitrite
However, in all the above-mentioned disclosed or authorized schemes, the above-mentioned method is invalid for medium-resistant Portland cement

Method used

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  • A low-temperature oil well early-strength cementing agent
  • A low-temperature oil well early-strength cementing agent
  • A low-temperature oil well early-strength cementing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 85 parts of ionic liquid, 15 parts of polycarboxylate superplasticizer, wherein, the structural formula of ionic liquid is:

[0030]

[0031] Use PO52.5 medium sulfate-resistant Portland cement, control the water-cement ratio of the cement slurry to 0.37, and the dosage is 0.8%. The test is carried out according to the above-mentioned experimental process, and the results are shown in the following table:

[0032] Performance Testing

[0033]

Embodiment 2

[0035] 90 parts of ionic liquid, 10 parts of polycarboxylate superplasticizer, wherein, the structural formula of ionic liquid is:

[0036]

[0037] Use PO52.5 medium sulfate-resistant Portland cement, control the water-cement ratio of the cement slurry to 0.37, and the dosage is 1.0%. The test is carried out according to the above-mentioned experimental process, and the results are shown in the following table:

[0038] Performance Testing

[0039]

Embodiment 3

[0041] 95 parts of ionic liquid, 5 parts of polycarboxylate superplasticizer, wherein, the structural formula of ionic liquid is:

[0042]

[0043] Use PO52.5 medium sulfate-resistant Portland cement, control the water-cement ratio of the cement slurry to 0.36, and the dosage is 0.9%. The test is carried out according to the above-mentioned experimental process, and the results are shown in the following table:

[0044] Performance Testing

[0045]

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Abstract

The invention relates to an oil field chemical, in particular to a low temperature oil well early strength well cementing agent, which is characterized by being prepared by mixing of the following raw materials by weight: 85-95% of an ionic liquid and 5-15% of a polycarboxylate superplasticizer. The polycarboxylate superplasticizer is obtained by polymerization of polymaleic anhydride and methoxypolyethylene glycol, the functional group mole ratio of methoxypolyethylene glycol to polymaleic anhydride is 0.8-1:15. With the dual efficacy of early strength and freezing prevention, the well cementing agent provided by the invention has a high promoting effect on early strength improvement of a well cementing liquid, and has no unfavorable influence on 28d strength. Sodium chloride able to cause negative effects on cement slurry later strength and sodium nitrite are not adopted by the well cementing agent provided by the invention, thus avoiding environment and construction personnel health problems caused thereby.

Description

technical field [0001] The invention relates to an oilfield chemical, in particular to an early-strength cementing agent for low-temperature oil wells. Background technique [0002] With the deepening of oil and gas exploration and development, there are more and more oil and gas drilling and cementing. Under low temperature conditions, on the one hand, due to the slow hydration rate and long retardation time of cement slurry, oil, gas and water channeling are prone to occur during the setting process, which affects the interlayer isolation. On the other hand, due to the slow development of cement strength and low early strength, the well construction period increases and the economic benefits of oil and gas field exploration and development are reduced. This requires the use of low-temperature early-strength agents to speed up the hydration rate of cement under low-temperature conditions, promote the development of cement stone early strength, and achieve the purpose of pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467C04B24/32C04B24/12
CPCC04B24/26C04B2103/302C09K8/467
Inventor 王岷全田兵于兵王新宇
Owner 山东聚鑫新材料有限公司
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