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Foaming drainage agent resisting methanol, condensate oil and high salinity

A technology of foam drainage agent and anti-condensate oil, which is applied in the field of foam drainage agent and foam drainage agent for natural gas well drainage and gas recovery. It can solve the problems of failure, foaming ability and stability of foam drainage agent, and achieve salt resistance. Moderate ability, good corrosion inhibition ability, strong foaming effect

Active Publication Date: 2015-04-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the temperature and salinity of the working conditions increase, the foaming ability and stability of the foaming agent will be greatly reduced, resulting in failure

Method used

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  • Foaming drainage agent resisting methanol, condensate oil and high salinity
  • Foaming drainage agent resisting methanol, condensate oil and high salinity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides an anti-methanol, anti-condensate, anti-high salinity foam drainage agent, the foam drainage agent is composed of various nonionic surfactants, anionic surfactants, amphoteric surfactants, Compounded with resist and pure water;

[0033] A variety of nonionic surfactants include polyether surfactants fatty alcohol polyoxyethylene ether (chemical name: AEO-9) and alkyl alcohol ether carboxylate (chemical name: AEC); anionic surfactants include Sodium lauryl sulfate (chemical name: K-12) and Jimmy’s cationic surfactant; the amphoteric surfactant is dodecyl dimethyl betaine (chemical name: BS-12); the drag reducer is poly Ethylene glycol (chemical name: PEG6000).

[0034] The content of each component in the above-mentioned foam drainage agent is as follows by mass percentage:

[0035] Fatty alcohol polyoxyethylene ether: 3%-5%; Alkyl alcohol ether carboxylate: 5%-10%; Sodium lauryl sulfate: 5%-10%; Jimmy cationic surfactant: 10%- 20%; lauryl dim...

Embodiment 2

[0038] Add 3% mass fraction of fatty alcohol polyoxyethylene ether AEO-9, 7% mass fraction of alkyl alcohol ether carboxylate AEC, 6% mass fraction of sodium lauryl sulfate K in a reactor with agitator -12, 14% mass fraction of Jimmy cationic surfactant (Here, the Jimmy phosphate double-headed surfactant of Henan Daochun Chemical Technology Co., Ltd.), 45% mass fraction of dodecyl dimethyl beet Base BS-12, 5% by mass fraction of polyethylene glycol PEG6000 and 20% by mass fraction of pure water, stirred for 30 minutes until completely dissolved, and then the foam discharge agent for drainage and gas recovery was obtained. After 24 hours of high-temperature aging, the foam volume was tested using the stirring method.

Embodiment 3

[0040] According to the method of Example 2, the amount of each raw material component of the foam drainage agent in this example is as follows:

[0041] Fatty alcohol polyoxyethylene ether: 5%;

[0042] Alkyl alcohol ether carboxylate: 5%;

[0043] Sodium lauryl sulfate: 10%;

[0044] Jimmy cationic surfactant: 10%;

[0045] Lauryl dimethyl betaine: 50%;

[0046] Polyethylene glycol: 5%;

[0047] Pure water: 15%;

[0048] Total: 100%.

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Abstract

The invention belongs to the technical field of oil-gas field chemical accessories, and in particular relates to a foaming drainage agent resisting methanol, condensate oil and high salinity. The foaming drainage agent is compounded from various nonionic surfactants, an anionic surfactant, an amphoteric surfactant, a drag reducer and pure water, wherein the various nonionic surfactants comprise polyether type surfactants including fatty alcohol-polyoxyethylene ether and alkyl alcohol ether carboxylate, the anionic surfactant comprises sodium lauryl alcohol sulfate and a Gemini cationic surfactant, the amphoteric surfactant is dodecyl dimethyl betaine, and the drag reducer is polyethylene glycol. The foaming drainage agent has relatively good biodegradability, and cannot be deposited and layered when in use. The foaming drainage agent provided by the invention is strong in foaming power, has rich and stable foams, is moderate in salt resistance, can be used in an oil-water-gas three-phase coproduction well containing condensate oil, has excellent foaming performance, is good in compatibility with various corrosion inhibitors, and also has good corrosion inhibiting ability.

Description

technical field [0001] The invention belongs to the technical field of chemical additives for oil and gas fields, and relates to a foam drainage agent for natural gas well drainage and gas recovery, in particular to a foam drainage agent resistant to methanol, condensate oil and high salinity. Background technique [0002] Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. Its essence belongs to chemical drainage, and it is a new technology developed by utilizing the foaming property of surfactants. The principle is to use the action of natural gas and the foaming agent dissolved in the well liquid to form a continuously rising foam column, carry out the liquid and the solid particles mixed in it from the well, and introduce some surfactants with special functions into the mineralized water at the bottom of the well With the help of the stirring of natural gas flow, it will fully contact with the bottom well...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584C09K2208/32
Inventor 刘毅郭自新吕亚博魏克颖任越飞张强罗彩龙吴红钦魏自涛
Owner PETROCHINA CO LTD
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