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Composition capable of improving recovery ratio considerably and preparation method thereof

A technology of recovery factor and composition, which is applied in the field of composition and its preparation that can greatly increase recovery factor, can solve the problems of alkali corrosion, high concentration and poor oil displacement efficiency in ASP flooding, and achieve The ability to reduce interfacial tension, excellent performance, and less harmful effects

Active Publication Date: 2013-06-05
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 fouling damage, etc., providing a new composition that can greatly enhance oil recovery

Method used

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  • Composition capable of improving recovery ratio considerably and preparation method thereof
  • Composition capable of improving recovery ratio considerably and preparation method thereof
  • Composition capable of improving recovery ratio considerably and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (a) Synthesis of N, N-dilauroyl ethylenediamine dipropionic 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 141.9 grams (1.65 moles) of methyl acrylate dropwise, continue the reaction for 3 hours after dropping, remove unreacted methyl acrylate and solvent 1,4-dioxane under reduced pressure, and the residue is methyl ethylenediamine dipropionate . Use 50wt% sodium hydroxide to adjust the pH of the reactio...

Embodiment 2

[0041] (a) Synthesis of N, N-dilauroyl hexamethylene diamine dipropionic 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 dipropionic acid 328.5 grams, molar yield 70.2%.

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

[0044]With [Example 1] (b), the difference is 328.5 grams (0.578 moles) of N, N-dilauroyl hexamethylene diamine dipropionic acid instead of 300.3 grams (0.529 moles) of N, N-dodecanoyl ethyl The usage amount of diamine dipropionic acid and ethylene oxide is 152.7g (3.470 moles), and the usage amount of the basic compound of calcium is 8.6 grams, get) N, N-dilauroyl hexamethylene diamine dipropionic acid di Polyoxyethylene ether (n=3) 446.0 g, molar yield 86.9%.

[0045] (c) Synthesis of N, N-dilauroylh...

Embodiment 3

[0049] (a) Synthesis of N, N-didecanoyl butanediamine dipropionic 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 others are the same to obtain 285.2 grams of N,N-didecanoylbutylene diamine dipropionic acid, and the molar yield is 69.9%.

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

[0052] With [Example 1] (b), the difference is 285.2 grams (0.524 moles) of N, N-didecanoyl butanediamine dipropionic acid instead of 300.3 grams (0.529 moles) of N, N-dilauroyl ethylene dipropionate The consumption of amine dipropionic acid and oxirane is 138.3g (3.144 mole), and the consumption of the basic compound of calcium is 6.7 grams, obtains N, N-didecanoyl butanediamine dipropionic acid dipolyoxyethylene...

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Abstract

The invention relates to a composition capable of improving recovery ratio considerably and a preparation method thereof. The invention mainly solves the problems of low oil displacement efficiency under high-temperature and high-salt conditions and high use concentration of surfactant-containing oil displacement agents and stratum and oil well corrosion and scale damage of three-component composite oil displacement alkalis in the prior art. The composition capable of improving the recovery ratio considerably comprises the following components: (1) 0.01 to 5.0 percent of N,N-difattyacylacyldiamine diaceticaciddiolyoxyethylene dicarboxylate; (2) 0.01 to 3.0 percent of polymer; and (3) 92.0 to 99.98 percent of formation water. The general molecular formula of the component (1) is shown below, wherein R1 may be a C9 to C17 alkyl, R2 may a C2 to C6 alkyl, n is the number of ethyoxyl (EO) and may be any integer ranging from 2 to 7, m may be metal ions of any of potassium, sodium or lithium; the polymer may be an ultrahigh-molecular-weight polyacrylamide (with a viscosity average molecular weight of 25 million), a temperature-resistance and salt-resistance polymer or xanthan gum; and the technical scheme that the water is selected from oil field formation water well solves the problems and can be used in the tertiary oil extraction production in oil field.

Description

technical field [0001] The invention relates to a composition capable of greatly increasing oil recovery 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, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C09K8/588
CPCC09K8/588C09K8/584
Inventor 沈之芹吴国英沙鸥李斌
Owner CHINA PETROLEUM & CHEM CORP
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