Foaming agent composition for high temperature gas drive and preparation method thereof

The technology of a composition and a foaming agent is applied in the field of foaming agent composition and preparation for gas flooding of high temperature oil reservoirs, which can solve the problems of high viscosity fingering and high resistance factor, and achieve the enhancement of stability, reduction of interfacial tension and increase of adsorption capacity. Effect

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 the problems of viscous fingering and gas channeling in the existing high-temperature gas drive process, and a new foam composition for high-temperature gas drive is provided. Forms foam, with the advantage of a high drag factor

Method used

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  • Foaming agent composition for high temperature gas drive and preparation method thereof
  • Foaming agent composition for high temperature gas drive and preparation method thereof
  • Foaming agent composition for high temperature gas drive 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 C 3 h 7 Cl) 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 ...

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 2CH 2 N(C 2 h 5 )(C 3 h 7 O)CH 3 Br) 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...

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 C 5 h 11 Br) 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, 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 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 foaming agent composition for high temperature gas drive and a preparation method thereof. The composition mainly solves the problems that the foaming agent does not have heat resistance and plugging capability of formed foam is low in the prior art. The composition comprises the following components according to mole fraction: 1 part of a long-chain polyether nitrogen containing compound and 0.1-50 parts of a long-chain diaryl sulfonate surfactant; wherein the long chain polyether nitrogen containing compound comprises a general molecular formula shown in formula (I), and the long-chain diaryl sulfonate surfactant comprises a molecular formula shown in formula (II), wherein in the formula (I), R1 is a C10-C26 fatty group; y=0-20, and z=0-60; R4, R5 and R6 are any one of C1-C5 alkyl and substituted alkyl; R7 is C1-C4 alkylene; and Y is selected from anion with electric neutrality of the molecule shown in the formula (I). The technical scheme can better solve the problems, and is used for high temperature gas drive oil extraction.

Description

technical field [0001] The invention relates to a foam composition for high-temperature 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594C09K8/584
CPCC09K8/594C09K8/584
Inventor 何秀娟裘鋆张慧李斌
Owner CHINA PETROLEUM & CHEM CORP
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