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Foam discharge agent composition for anti-salinity drainage and gas recovery, preparation method and application thereof

A technology of drainage and gas recovery and foaming agent, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as stop blowout, excessive fluid accumulation in gas wells, and production reduction in gas wells, so as to increase salt tolerance and good performance. Technical effect, the effect of strengthening foam stabilization performance

Active Publication Date: 2019-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that the existing gas wells have too much liquid in the development process, which leads to the production reduction or even stop blowout of the gas wells. It provides a high-efficiency liquid-carrying foam discharge agent composition for gas wells, which has good Salt resistance, foaming performance and liquid carrying capacity

Method used

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  • Foam discharge agent composition for anti-salinity drainage and gas recovery, preparation method and application thereof
  • Foam discharge agent composition for anti-salinity drainage and gas recovery, preparation method and application thereof
  • Foam discharge agent composition for anti-salinity drainage and gas recovery, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation of composition CX-1, preparation steps:

[0043] (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:

[0044] 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 in 179.9 grams of propylene oxide, control the pressure ≤ 0.60MPa, cool down 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, yield 98.8wt%. ...

Embodiment 2

[0051] The preparation of composition CX-2, preparation steps:

[0052] (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:

[0053] 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 ...

Embodiment 3

[0060] The preparation of composition CX-3, preparation steps:

[0061] (1) Long-chain polyether nitrogen-containing compound (C 14 h 29 OC 3 h 6 O(CH 2 CH 2 O) 8 CH 2 CH 2 N(C 3 h 7 O) 2 O) Synthesis and preparation:

[0062] 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 203.0 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) 9 H, yield 98.7...

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Abstract

The invention relates to a salinity resistant foam scrubbing agent composition used for drainage gas recovery and a preparation method and application thereof. The salinity resistant foam scrubbing agent composition used for drainage gas recovery aims at solving the problems of reduction of output and even flowing stop of gas wells caused by excessive hydrops during developing of the current gas wells. According to the adopted technical scheme, the foam scrubbing agent is prepared from, by mole fraction, 1 part of long chain polyether nitrogen compound and 0.5-20 parts of sulfonated fatty acid alkyl ester, wherein the general molecular formula of the long chain polyether nitrogen compound is shown as a formula (I), and R1 is a fatty group of C8-C30; y is a PO chain segment adding number; z is a EO chain segment adding number; R2 is a alkylene of C1-C4; R3, R4 are any one of a alkyl group and a substituted alkyl group; the salinity resistant foam scrubbing agent composition used for drainage gas recovery solves the problem well. The foaming height of the salinity resistant foam scrubbing agent composition is larger than 200 mm, the liquid carrying capability of the hypersalinity resistant foam scrubbing agent composition is larger than 140 mL, and the salinity resistant foam scrubbing agent composition can be used for the drainage gas recovery of hyperhaline gas wells. . The formula is shown in the description.

Description

technical field [0001] The invention relates to a foam discharge agent composition for anti-salinity drainage and gas recovery, a preparation method and application thereof, and belongs to the technical field of oil and gas field chemical agents. Background technique [0002] With the intensification of gas field exploitation, water production from gas fields has become a key issue restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the normal production of gas wells. The so-called foam drainage is to introduce some surfactants with special functions into the mineralized water at the bottom of the well, so that a large amount of low-density water-containing foam is produced during the vertical flow of gas-liquid two-phase mixing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 裘鋆何秀娟何良好金军
Owner CHINA PETROLEUM & CHEM CORP