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Foam drainage agent composition for high-condensate-gas well as well as preparation method and application of foam drainage agent composition

A foam drainage and composition technology, which is applied in the directions of drilling compositions, chemical instruments and methods, and earth-moving drilling, etc., can solve the problems of insufficient oil resistance of foam, poor foam drainage performance, and bottom-hole fluid accumulation, etc. Achieve the effect of reducing emulsification performance, improving foam oil resistance and reducing gas flow resistance

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the lack of foam oil resistance of the existing foam liquid drainage agent in the gas well development process in the prior art, which leads to poor foam liquid drainage performance, resulting in bottom-hole fluid accumulation, gas well production reduction or even stop spraying Deficiencies, providing a foam liquid discharge agent composition and its preparation method and application, the foam liquid discharge agent composition has excellent foam oil resistance, so that it has excellent foam liquid discharge performance when applied

Method used

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  • Foam drainage agent composition for high-condensate-gas well as well as preparation method and application of foam drainage agent composition
  • Foam drainage agent composition for high-condensate-gas well as well as preparation method and application of foam drainage agent composition
  • Foam drainage agent composition for high-condensate-gas well as well as preparation method and application of foam drainage agent composition

Examples

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preparation example Construction

[0031] The source of the isomeric alcohol polyoxypropylene ether is not particularly limited in the present invention, and it can be prepared by any existing method, and can also be obtained commercially. The following takes a specific preparation method of an isomeric alcohol polyoxypropylene ether as an example to illustrate, and the present invention is not limited thereto. The specific preparation method of the isomeric alcohol polyoxypropylene ether may include: reacting isomeric alcohol and propylene oxide under the condition of a reaction temperature of 85-160 ° C and a pressure of 0-0.8 MPa gauge pressure under the action of a catalyst to obtain isomeric alcohol poly Oxypropylene ether; wherein the molar ratio of propylene oxide to iso-alcohol is 1-25:1; the catalyst is a basic compound of potassium, and the dosage is 0.3%-3% by weight of iso-alcohol.

[0032] The present invention has a wide optional range for the structure of the isomeric alcohol polyoxypropylene eth...

Embodiment 1

[0060] This example is used to illustrate the foam discharge agent composition of the present invention and its preparation method.

[0061] In this embodiment, the isomeric alcohol polyoxypropylene ether is isomeric tridecanol polyoxypropylene ether, and n=1, R 1 for C 13 H 27 . The preparation method of the isotridecanol polyoxypropylene ether comprises: adding 1 mole of isotridecanol (commercially available from Nantong Runfeng Petrochemical Co., Ltd.) and 1% hydrogen peroxide of isotridecanol weight into the reactor Potassium catalyst, heated to 135 ℃, opened the vacuum system, dehydrated for 1 hour, then purged with nitrogen 3-4 times to remove the air in the system, and then adjusted the reaction temperature of the system to 150 ℃ and fed 1 mole of propylene oxide to control The alkoxylation reaction was carried out at a pressure of less than 0.6 MPa for 2 hours. After the reaction was completed, the system was purged with nitrogen, and after cooling, the isotridecano...

Embodiment 2

[0064] This example is used to illustrate the foam discharge agent composition of the present invention and its preparation method.

[0065] In this embodiment, the isomeric alcohol polyoxypropylene ether is isomeric tridecanol polyoxypropylene ether, and n=3, R 1 for C 13 H 27 . The preparation method of isotridecanol polyoxypropylene ether comprises: adding 1 mole of isotridecanol (commercially available from Nantong Runfeng Petrochemical Co., Ltd.) and 2% by weight of isotridecanol into a reactor Potassium catalyst, heated to 135°C, opened the vacuum system, dehydrated for 1 hour, then purged with nitrogen 3-4 times to remove the air in the system, then adjusted the reaction temperature of the system to 150°C and fed 3 moles of propylene oxide to control The alkoxylation reaction was carried out at a pressure of less than 0.6 MPa for 3 hours. After the reaction was completed, the system was purged with nitrogen, and after cooling, the isotridecanol polyoxypropylene ether...

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Abstract

The invention relates to the field of foam liquid drainage gas production, and discloses a foam liquid drainage agent composition for a high condensate gas well and a preparation method and application thereof. The foam liquid drainage agent composition comprises, by weight, isomeric alcohol polyoxypropylene ether, fatty alcohol and a foam stabilizer. On the basis of 1 part of the isomeric alcohol polyoxypropylene ether, the content of the fatty alcohol is 0.01-10 parts by weight, and the content of the foam stabilizer is 0.01 to 10 parts by weight. The isomeric alcohol polyoxypropylene ether has a structure as shown in a formula (I). In the formula (I), R1 is selected from C6-C18 isomeric aliphatic hydrocarbon groups, and n is any number from 1 to 25. Compared with the prior art, the foam drainage agent composition can effectively reduce the surface tension of gas oil and improve the oil resistance of foam, so foam is generated from condensate oil more easily, and liquid is carried out smoothly.

Description

technical field [0001] The invention relates to the field of foam liquid drainage and gas production, in particular to a foam liquid drainage agent composition for high condensate gas wells and a preparation method and application thereof. Background technique [0002] Condensate gas reservoir is a gas reservoir between oil and gas reservoirs. The hydrocarbons in the condensate gas reservoir are gas phase under the original formation conditions, and then condense into liquid phase due to the decrease of temperature and pressure. With the development of gas wells, the gas production rate decreases, and gas wells face liquid accumulation, threatening the stable production of gas wells. Therefore, the effusion needs to be drained. [0003] In recent years, one of the rapidly developing liquid drainage and gas recovery technologies at home and abroad is foam drainage and gas recovery. Foam with certain stability; the liquid phase deposited by slippage in the pipe becomes foam,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584E21B43/22
CPCC09K8/584E21B43/16
Inventor 何秀娟雷炜马俊伟姚麟昱张慧吴春芳
Owner CHINA PETROLEUM & CHEM CORP
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