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High salinity oil reservoir gas drive foaming agent composition and preparation method thereof

A technology of composition and foam agent, which is applied in the field of foam agent composition and preparation for gas flooding in high-salt oil reservoirs, can solve the problems of poor salt tolerance and small foam plugging ability of foam agents, and achieve improved salt resistance, The effect of increased adsorption capacity and good salt tolerance

Inactive Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the foam agent in the existing gas drive oil recovery process has poor salt tolerance and the foam plugging ability is small. A new foam agent composition is provided

Method used

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  • High salinity oil reservoir gas drive foaming agent composition and preparation method thereof
  • High salinity oil reservoir gas drive foaming agent composition and preparation method thereof
  • High salinity oil reservoir gas drive foaming agent composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of composition HF-1, preparation steps:

[0042] (1) Long-chain polyether nitrogen-containing compound (C 12 h 25 O(CHCH 3 CH 2 O) 3 (CH 2 CH 2 O) 7 CH 2 CH 2 N(CH 3 ) 2 O) synthesis and preparation:

[0043] Add 186.0 grams of dodecanol and 5.6 grams of potassium hydroxide to a pressure reactor equipped with a stirring device, and when heated to 80-90°C, open the vacuum system, dehydrate under high vacuum for 1 hour, and then replace with nitrogen for 3- 4 times, adjust the reaction temperature of the system to 150 ° C and slowly pass 179.9 grams of propylene oxide, control the pressure ≤ 0.60 MPa, lower the temperature to 90 ° C, remove low boilers in vacuum, continue to adjust the reaction temperature of the system to 150 ° C and slowly pass Inject 360.0 grams of ethylene oxide and control the pressure to ≤0.60MPa. After the reaction, neutralize and dehydrate after cooling to obtain C 12 h 25 O(CHCH 3 CH 2 O) 3 (CH 2 CH 2 O) 8 H, ...

Embodiment 2

[0050] The preparation of composition HF-2, preparation steps:

[0051] (1) Long-chain polyether nitrogen-containing compound (C 16 h 33 O(CHCH 3 CH 2 O) 10 (CH 2 CH 2 O) 20 CH 2 CH 2 N(C 2 h 5 )(C 3 h 7 O) O) synthesis and preparation:

[0052] Add 121 grams of cetyl alcohol and 3 grams of potassium hydroxide to a pressure reactor equipped with a stirring device, and when heated to 80-90°C, open the vacuum system, dehydrate under high vacuum for 1 hour, and then replace with nitrogen for 3- 4 times, adjust the reaction temperature of the system to 150 ° C and slowly pass 300 grams of propylene oxide, control the pressure ≤ 0.60 MPa, cool down to 90 ° C, remove the low boilers in vacuum, continue to adjust the reaction temperature of the system to 150 ° C and slowly pass Inject 500.0 grams of ethylene oxide, and control the pressure to ≤0.60MPa. After the reaction, neutralize and dehydrate after cooling to obtain C 16 h 33 O(CHCH 3 CH 2 O) 10 (CH 2 CH 2 O...

Embodiment 3

[0059] The preparation of composition HF-3, preparation steps:

[0060] (1) Long-chain polyether nitrogen-containing compound (C 14 h 29 OCHCH 3 CH 2 O(CH 2 CH 2 O) 30 CH 2 CH 2 N(C 3 h 7 O) 2 O) synthesis and preparation:

[0061] Add 107.0 grams of myristyl alcohol and 3.0 grams of potassium hydroxide to a pressure reactor equipped with a stirring device, and when heated to 80-90°C, open the vacuum system, dehydrate under high vacuum for 1 hour, and then replace with nitrogen for 3- 4 times, adjust the reaction temperature of the system to 150°C and slowly pass in 60 grams of propylene oxide, control the pressure ≤ 0.60MPa, lower the temperature to 90°C, remove the low boilers in vacuum, continue to adjust the reaction temperature of the system to 150°C and slowly pass through Inject 700.0 grams of ethylene oxide and control the pressure to ≤0.60MPa. After the reaction, neutralize and dehydrate after cooling to obtain C 14 h 29 OCHCH 3 CH 2 O(CH 2 CH 2 O) ...

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Abstract

The invention relates to a high salinity oil reservoir gas drive foaming agent composition and a preparation method thereof, and mainly solves the problems that in an existing high salinity oil reservoir gas drive oil extraction process, foaming agents have poor salt resistance, can generate precipitate after encountering divalent ions, and the formed foams have low blocking capability. The foaming agent composition provided by the invention comprises the following components by mole fraction: 1 part of a long chain polyether nitrogen-containing compound and 0.1-50 parts of a long chain diphenyl ether sulfonate surfactant, wherein the long chain polyether nitrogen-containing compound has a general molecular formula shown as formula (I), the long chain diphenyl ether sulfonate surfactant has a general molecular formula shown as formula (II), the R1 is a fatty group of C10-C26, y is a chain segment sum, R4 and R5 are any one of alkyl and substituted alkyl of C1-C5, and R6 is alkylene of C1-C4. The technical scheme well solves the problems, and can be used for high salinity oil reservoir gas drive oil extraction.

Description

technical field [0001] The invention relates to a foam composition for high-salt oil reservoir gas flooding and a preparation method. Background technique [0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among new technologies for tertiary oil recovery, chemical composite flooding is still one of the most promising methods. The oil displacement mechanism is mainly that the polymer or glue increases the viscosity of the displacement water, reduces the oil-water mobility ratio, alleviates the channeling phenomenon, and improves the sweep efficiency; the surfactant and alkali reduce the oil / water interfacial tension, increase the capillary number, and promote Crude oil is desorbed and effectively dispersed from ro...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/594
CPCC09K8/584C09K8/594
Inventor 何秀娟张卫东许晓菁吴国英张慧
Owner CHINA PETROLEUM & CHEM CORP