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Hydrophobic association polymer-surfactant composition and composite flooding system

A composite surfactant and surfactant technology, which is applied in the direction of drilling composition, production fluid, wellbore/well components, etc., can solve the problems affecting the oil displacement efficiency of poly-surface binary composite 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 this invention is that hydrophobic association polymer and existing surfactant compound in the prior art, when surfactant concentration is bigger (especially composite surfactant concentration is greater than hydrophobic association polymer Concentration), the problem that the viscosity drop of the compound system affects the oil displacement efficiency of the poly-surface binary compound flooding, a kind of hydrophobic association polymer-surfactant composition is provided, in this composition, with the increase of the concentration of the compound surfactant, When the viscosity of the system increases, when the concentration of the composite surfactant is higher (the concentration of the composite surfactant is greater than that of the hydrophobic association polymer), the concentration of the system can still continue to increase, which has the advantages of high-efficiency viscosity increase and enhanced recovery

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Components and contents of binary compound flooding:

[0066] Hydrophobic association polymer: 0.05~0.15;

[0067] Composite surfactant: 0.1~0.5;

[0068] Water: 99.35 ~ 99.85.

[0069] Hydrophobic association polymer: the degree of hydrolysis is 22%, the hydrophobic group R 11 for -(CH 2 ) 2 -N(CH 3 ) 2 -C 14 h 29 Cl (content is 1.5mol%) polyacrylamide (that is x:y:z=76.5:22:1.5, M 2 =Na + ).

[0070] Each component and content of composite surfactant: (wt%)

[0071] Palmimidopropyl Betaine (R 1 =C 15 , R 2 =C 3 , R 3 , R 4 =C 1 , R 5 =C 1 , A is COO - ): 40;

[0072] Cetyl dimethyl betaine (R 6 =C 16 , R 7 , R 8 , R 9 =C 1 , B is COO - ): 20;

[0073] Sodium 6-methyl-2-naphthalenesulfonate: 40.

[0074] 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 con...

Embodiment 2

[0076] Components and contents of binary compound flooding:

[0077] Hydrophobic association polymer: 0.05~0.15;

[0078] Composite surfactant: 0.1~0.5;

[0079] Water: 99.35 ~ 99.85.

[0080] Hydrophobic association polymer: the degree of hydrolysis is 25%, the hydrophobic group is -CH 2 -N(CH 3 ) 2 -C 18 h 37 Br (content is 1.0mol%) polyacrylamide (ie x:y:z=74:25:1, M 2 =Na + ).

[0081] Each component and content of composite surfactant: (wt%)

[0082] Erucamidopropyl Betaine (R 1 =C 21 , R 2 =C 3 , R 3 , R 4 , R 5 =C 1 , A is COO - ): 42;

[0083] Octadecyldimethylbetaine (R 6 =C 18 , R 7 , R 8 , R 9 =C 1 , B is COO - ): 28;

[0084] Sodium 1-naphthalenesulfonate: 30.

[0085] 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 temp...

Embodiment 3

[0087] Components and contents of binary compound flooding:

[0088] Hydrophobic association polymer: 0.05~0.15;

[0089] Composite surfactant: 0.1~0.5;

[0090] Water: 99.35 ~ 99.85.

[0091] Hydrophobic association polymer: the degree of hydrolysis is 25%, the hydrophobic group is -CH 2 -N(CH 3 ) 2 -C 16 h 33 Br (content is 1.2mol%) polyacrylamide (namely x:y:z=73.8:25:1.2, M 2 = K + ).

[0092] Each component and content of composite surfactant: (wt%)

[0093] 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;

[0094] tetradecyl dimethyl betaine (R 6 =C 14 , R 7 , R 8 =C 1 , R 9 =C 2 , B is SO 3 - ):twenty four;

[0095] Sodium 7-ethyl-1-naphthalenesulfonate: 40.

[0096] 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 li...

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Abstract

The invention relates to an efficient tackifying hydrophobic associative polymer-surfactant composition and a composite flooding system, and mainly solves the problem that when a hydrophobic associative polymer existing in the prior art is compounded with a surfactant existing in the prior art, and the concentration of the surfactant is large, the viscosity of the compound system is reduced to affect the oil flooding efficiency of the polymer-surfactant binary composite flooding system, the problem can be well solved by the hydrophobic associative polymer-surfactant binary composition, and thehydrophobic associative polymer-surfactant binary composition can be used in oil recovery in an oil fields. The hydrophobic associative polymer-surfactant binary composition includes the following components: a hydrophobic associative polymer and a composite surfactant in a mass ratio of (0.5 to 3): (0.1 to 5), wherein the composite surfactant comprises alkyl amido betaine, alkylbetaine and naphthalenesulfonate in a mass ratio of (1 to 60): (1 to 60) :(20 to 60).

Description

technical field [0001] The invention relates to a hydrophobic association polymer-surfactant composition and a composite 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 sustainable, stable 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 a very important technology that has been a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/588C09K8/584E21B43/22
CPCC09K8/584C09K8/588C09K2208/30E21B43/16
Inventor 吴春芳沈之芹李应成王辉辉
Owner CHINA PETROLEUM & CHEM CORP
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