High efficiency anti-magnesium ions oil displacement agent and its preparation method

The technology of magnesium ion and oil displacement agent is applied in the field of high-efficiency anti-magnesium ion oil displacement agent and its preparation. Strong ability, excellent performance, high salinity resistance effect

Active Publication Date: 2013-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that the oil displacement agent containing surfactant in the prior art has poor oil displacement efficiency under high temperature and high salinity conditions, the use concentration is high, and the alkali in the ASP flooding brings formation and oil wells. Corrosion and scale damage problems, providing a new high-efficiency anti-magnesium ion oil displacement agent

Method used

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  • High efficiency anti-magnesium ions oil displacement agent and its preparation method
  • High efficiency anti-magnesium ions oil displacement agent and its preparation method
  • High efficiency anti-magnesium ions oil displacement agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (a) Synthesis of N, N-dilauroyl ethylenediamine dimethyl propionic acid

[0034] 300 grams (1.5 moles) of lauric acid, 267.8 grams (2.25 moles) of thionyl chloride and 4.5 grams of DMF were added to a 1000-milliliter four-necked flask equipped with a sealed mechanical stirrer, a thermometer, a condenser tube, etc., and reacted at 90 ° C for 3 After one hour, excess thionyl chloride was distilled off under reduced pressure to obtain lauroyl chloride. Add 45.0 grams (0.75 moles) of anhydrous ethylenediamine and 180 grams of 1,4-dioxane to another 2000 ml four-neck flask equipped with a sealed mechanical stirrer, a thermometer, and a condenser tube, heat up to 50° C., and slowly Add 165.0 grams (1.65 moles) of methyl methacrylate dropwise, continue the reaction for 3 hours after dropping, remove unreacted methyl methacrylate and solvent 1,4-dioxane under reduced pressure, and the residue is ethylenediamine dioxane. Methyl methpropionate. Use 50wt% sodium hydroxide to adj...

Embodiment 2

[0041] (a) Synthesis of N, N-dilauroyl hexamethylenediamine dimethylpropionic acid

[0042] With [Example 1] (a), the difference replaces 45.0 grams (0.75 moles) of anhydrous ethylenediamine with 87.0 grams (0.75 moles) of anhydrous hexamethylenediamine, and the rest are the same to obtain N, N-dilauroyl Hexamethylenediamine dimethyl propionic acid 328.6 grams, molar yield 67.2%.

[0043] (b) Synthesis of N,N-dilauroylhexamethylene diamine dimethyl propionate dipolyoxyethylene ether (n=3)

[0044] With [Example 1] (b), the difference is 328.6 grams (0.504 moles) of N, N-dilauroyl hexamethylenediamine dimethyl propionic acid instead of 306.2 grams (0.514 moles) of N, N-didodecanoic acid The consumption of acyl ethylenediamine dimethyl propionic acid and oxirane is 133.1g (3.024 moles), and the consumption of the basic compound of calcium is 7.5 grams to obtain N, N-dilauroyl hexamethylene diamine Dipolyoxyethylene methpropionate (n=3) was 409.5 grams, and the molar yield was ...

Embodiment 3

[0049] (a) Synthesis of N, N-didecanoyl butanediamine dimethylpropionic acid

[0050] With [Example 1] (a), the difference replaces 300.0 grams (1.5 moles) of lauric acid with 261.0 grams (1.5 moles) of capric acid, and replaces 45.0 grams (0.75 grams) of anhydrous butanediamine with 66.0 grams (0.75 moles). mol) anhydrous ethylenediamine, and the rest are the same to obtain 283.3 grams of N, N-didecanoyl butanediamine dimethylpropionic acid, and the molar yield is 66.5%.

[0051] (b) Synthesis of N, N-didecanoyl butanediamine dimethyl propionate dipolyoxyethylene ether (n=3)

[0052] With [Example 1] (b), the difference is 283.3 grams (0.499 moles) of N, N-didecanoyl butanediamine dimethyl propionic acid instead of 306.2 grams (0.514 moles) of N, N-dilauroyl The consumption of ethylenediamine dimethylpropionic acid and oxirane is 131.7g (2.994 moles), and the consumption of the basic compound of calcium is 6.4 grams to obtain N, N-didecanoyl butanediamine dimethyl Dipolyoxy...

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Abstract

The invention relates to a high efficiency anti-magnesium ions oil displacement agent and its preparation method, which mainly solves the problems that poor oil displacement efficiency of the surfactant-containing oil displacement agent under the high temperature and high salinity, high usage concentration, and the corrosion and scale depositing of stratum and oil well caused by the presence of alkali in the ternary combination flooding in the prior art. The high efficiency anti-magnesium ions oil displacement agent comprises the following components by mass percent: (1) 0.01-5.0% of N,N-dualfat acyl diamine dimethyl propionic acid polyoxyethylene ether disulfonate; (2) 0.01-3.0% of polymer; (3) 92.0-99.98% of injected water; wherein a molecule general formula in the component (1) is: inthe formula, R1 is C9-C17 alkyl, R2 is C2-C6 alkyl, n is an adduct number of an ethoxy group EO, the data range is any integer in 2-7; M is selected from any one metal ion of potassium, sodium or lithium; a polymer is selected from one or two of ultrahigh molecular weight anionic polyacrylamide, modified polyacrylamide or xanthan gum; and oil field injected water is selected for water. The technical scheme better solves the problems, and can be applied to the production of tertiary oil recovery in oil fields.

Description

technical field [0001] The invention relates to a high-efficiency anti-magnesium ion oil displacement agent and a preparation method thereof. Background technique [0002] With the development of society and economy, people's demand for oil continues to increase and oil reserves decrease, and oil, as a non-renewable resource, is becoming more and more valuable. The problems we are facing are: first, the contradiction between supply and demand is prominent, the demand for oil is getting bigger and bigger, and new oil fields are getting fewer and fewer; second, there is still a large amount of crude oil left in the depleted oil reservoirs. Primary oil recovery (POR) can produce 10-25% of underground crude oil, and secondary oil recovery (SOR) can recover 15-25% of underground crude oil, that is, primary oil recovery and secondary oil recovery only produce 25-50% of underground crude oil. In order to ensure the long-term stable supply of oil and meet the needs of human beings,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C09K23/04
Inventor 沈之芹沙鸥吴国英唐恒志
Owner CHINA PETROLEUM & CHEM CORP
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