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Hydrophobic association polymer-surfactant composition and binary composite flooding system

A composite surfactant and surfactant technology, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of system viscosity increase, affecting poly-surface binary compound flooding, etc.

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that in the prior art, hydrophobic association polymers are compounded with existing surfactants. When the concentration of surfactants is high, the viscosity of the compounded system decreases and affects the poly-surface binary compound flooding. The problem of oil displacement efficiency, a kind of hydrophobic association polymer-surfactant composition is provided, in this composition, along with the compound surfactant concentration increases, system viscosity increases, when the compound surfactant concentration is bigger (especially The concentration of the composite surfactant is greater than the concentration of the hydrophobic association polymer), and the system concentration can still increase continuously, which has the advantages of high-efficiency viscosity increase and enhanced recovery

Method used

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  • Hydrophobic association polymer-surfactant composition and binary composite flooding system
  • Hydrophobic association polymer-surfactant composition and binary composite flooding system
  • Hydrophobic association polymer-surfactant composition and binary composite flooding system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Components and contents of binary compound flooding:

[0065]Hydrophobic association polymer: 0.05~0.15;

[0066] Composite surfactant: 0.1~0.5;

[0067] Water: 99.35 ~ 99.85.

[0068] Hydrophobic association polymer: the degree of hydrolysis is 23%, the hydrophobic group is R 11 for -(CH 2 ) 2 -N(CH 3 ) 2 -C 14 h 29 Cl (content is 1.2mol%) polyacrylamide (that is x:y:z=75.8:23:1.2, M 2 =Na + ).

[0069] Each component and content of composite surfactant: (wt%)

[0070] Oleamidopropyl Betaine (R 1 =C 17 , R 2 =C 3 , R 3 , R 4 =C 1 , R 5 =C 1 , A is COO - ): 40;

[0071] Cetyl dimethyl betaine (R 6 =C 16 , R 7 , R 8 , R 9 =C 1 , B is COO - ): 30;

[0072] Sodium Salicylate: 30.

[0073] Binary compound flooding system preparation: under the conditions of 50°C and 600rpm rotation speed, the above hydrophobic association polymer was dissolved in simulated water or oil field water to prepare a polymer mother liquor with a concentration of 0.5%...

Embodiment 2

[0075] Components and contents of binary compound flooding:

[0076] Hydrophobic association polymer: 0.05~0.15;

[0077] Composite surfactant: 0.1~0.5;

[0078] Water: 99.35 ~ 99.85.

[0079] Hydrophobic association polymer: the degree of hydrolysis is 22%, the hydrophobic group is -CH 2 -N(CH 3 ) 2 -C 18 h 37 Br (content is 1.0mol%) polyacrylamide (ie x:y:z=77:22:1, M 2 =Na + ).

[0080] Each component and content of composite surfactant: (wt%)

[0081] Erucamidopropyl Betaine (R 1 =C 21 , R 2 =C 3 , R 3 , R 4 , R 5 =C 1 , A is COO - ): 42;

[0082] Octadecyldimethylbetaine (R 6 =C 18 , R 7 , R 8 , R 9 =C 1 , B is COO - ): 28;

[0083] Sodium p-toluenesulfonate: 30.

[0084] Binary compound flooding system preparation: under the conditions of 50°C and 600rpm rotation speed, the above hydrophobic association polymer was dissolved in simulated water or oil field water to prepare a polymer mother liquor with a concentration of 0.5%. At room temperat...

Embodiment 3

[0086] Components and contents of binary compound flooding:

[0087] Hydrophobic association polymer: 0.05~0.15;

[0088] Composite surfactant: 0.1~0.5;

[0089] Water: 99.35 ~ 99.85.

[0090] Hydrophobic association polymer: the degree of hydrolysis is 25%, the hydrophobic group is -(CH 2 ) 2 -N(CH 3 ) 2 -C 12 h 25 Br (content is 1.8mol%) polyacrylamide (namely x:y:z=73.2:25:1.8, M 2 = K + ).

[0091] Each component and content of composite surfactant: (wt%)

[0092] Cocamidopropyl Betaine (R 1 =C 7 ~C 17 , R 2 =C 3 , R 3 , R 4 =C 1 , R 5 =C 2 , A is SO 3 - ): 36;

[0093] tetradecyl dimethyl betaine (R 6 =C 14 , R 7 , R 8 =C 1 , R 9 =C 2 , B is SO 3 - ): 34;

[0094] Sodium Benzoate: 30.

[0095] Binary compound flooding system preparation: under the conditions of 50°C and 600rpm rotation speed, the above hydrophobic association polymer was dissolved in simulated water or oil field water to prepare a polymer mother liquor with a concentratio...

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Abstract

The invention relates to a hydrophobic association polymer-surfactant composition and a binary combination flooding system, and mainly solves the problem that the oil displacement efficiency of polymer-surfactant binary combination flooding is affected by reduction of the viscosity of a compounded system under the condition of a relatively large concentration of a surfactant during compounding ofa hydrophobic association polymer and a conventional surfactant in the prior art. By adoption of a technical scheme that the hydrophobic association polymer-surfactant binary combination flooding composition is prepared from the following components: the hydrophobic association polymer and a compound surfactant according to a mass ratio of (0.5 to 3):(0.1 to 5), and the compound surfactant is prepared from alkyl amido betaine, lauryl betaine and aromatic acid salt according to a mass ratio of (1 to 60):(1 to 60):(20 to 60), the problem is well solved, and the hydrophobic association polymer-surfactant composition can be applied to oil extraction in an oil field.

Description

technical field [0001] The invention relates to a high-efficiency viscosity-increasing hydrophobic association polymer-surfactant composition and a binary compound flooding system. Background technique [0002] With the development of society and economy, the contradiction between supply and demand of oil has become increasingly prominent. Rational development and utilization of existing oil reserves and improvement of oil extraction efficiency are effective ways to solve this contradiction, and are of great significance to the stable, sustainable and healthy development of society. Conventional oil recovery methods (primary oil recovery and secondary oil recovery) can only recover 15% to 50% of crude oil. Tertiary oil recovery can increase oil recovery by 6% to 20%, or even more, through enhanced oil recovery measures. Tertiary oil recovery is divided into four categories: thermal flooding, gas flooding, chemical flooding and microbial oil recovery. Chemical flooding is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584C09K2208/30
Inventor 吴春芳李应成沈之芹
Owner CHINA PETROLEUM & CHEM CORP
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