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Oil displacement composition containing polyether carboxylate surfactant and preparation method thereof

A technology of surfactant and polyether carboxylate, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high preparation cost, high temperature resistance and high salt performance of oil displacement compositions

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the problem of high preparation cost, poor high temperature resistance and high salt performance of the oil displacement composition in the prior art, and a new oil displacement composition containing polyether carboxylate surfactant is provided thing

Method used

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  • Oil displacement composition containing polyether carboxylate surfactant and preparation method thereof
  • Oil displacement composition containing polyether carboxylate surfactant and preparation method thereof
  • Oil displacement composition containing polyether carboxylate surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) The polyether carboxylate surfactant structural formula of preparation is as follows:

[0057] Add 242 grams (1 mole) of cetyl alcohol and 8.6 grams of potassium hydroxide to a 2L pressure reactor equipped with a stirring device. When heating to 80-90°C, open the vacuum system, dehydrate under high vacuum for 1 hour, and then use Nitrogen was replaced 3 to 4 times, and the reaction temperature of the system was adjusted to 140°C and 132.0 grams (3 moles) of ethylene oxide was slowly introduced, and then 469.8 grams (8.1 moles) of propylene oxide was slowly introduced at 150°C to control the pressure ≤0.60MPa, after the propylene oxide reaction is completed, adjust the temperature to 140°C and slowly introduce 178.2 grams (4.05 moles) of ethylene oxide to control the pressure ≤0.40MPa. After the reaction was finished, lower the temperature to 90°C, remove the low boilers in vacuum, neutralize and dehydrate after cooling to obtain 998.8 grams of cetyl alcohol polyoxye...

Embodiment 2

[0063] (1) The polyether carboxylate surfactant structural formula of preparation is as follows:

[0064] Add 220 grams (1 mole) of nonylphenol, 1.5 grams of potassium hydroxide and 4.6 grams of anhydrous potassium carbonate in the 2L pressure reactor equipped with stirring device, carry out water removal and nitrogen replacement with [Example 1], the system Adjust the reaction temperature to 140°C and slowly feed 88.0 g (2.0 moles) of ethylene oxide, then slowly feed 585.8 g (10.1 moles) of propylene oxide at 150°C, and control the pressure to ≤0.60 MPa until the propylene oxide reacts After the completion, adjust the temperature to 140° C. and slowly introduce 134.2 grams (3.05 moles) of ethylene oxide to control the pressure to ≤0.40 MPa. After the reaction was finished, the post-treatment was the same as in [Example 1] to obtain 991.4 grams of nonylphenol polyoxyethylene (2) polyoxypropylene (10) polyoxyethylene (3) ether, with a yield of 97.2%.

[0065] Add 510 g (0.5 mo...

Embodiment 3

[0069] (1) The polyether carboxylate surfactant structural formula of preparation is as follows:

[0070] R 1 O(CH 2 CH 2 O) 5 (CHCH 3 CH 2 O) 4 (CH 2 CH 2 O) 20 CH 2 COONa

[0071] Among them, R 1 The carbon chain distribution is: C 12 72.3%, C 14 27.7%.

[0072] Add 195.0 g (1 mole) of mixed twelve / fourteen (C 12～14 ) alcohol, 14.5 grams of anhydrous potassium carbonate, carry out water removal and nitrogen replacement with [Example 1], the system reaction temperature is adjusted to 140 ℃ and slowly feeds 222.2 grams (5.05 moles) of oxirane, then at 150 ℃ Slowly feed 234.9 grams (4.05 moles) of propylene oxide, and control the pressure to ≤0.50 MPa. After the reaction of propylene oxide is completed, lower the temperature, and slowly feed 924 grams (21 moles) of ethylene oxide at 130°C, and control the pressure ≤0.40MPa. After the reaction finishes, with [embodiment 1] aftertreatment, must mix 12 / 14 (C 12～14 ) alcohol polyoxyethylene (5) polyoxypropylene (4) ...

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Abstract

The invention relates to an oil displacement composition containing a polyether carboxylate surfactant and a preparation method thereof, and mainly solves the problems of high preparation cost and poor high temperature and high salt resistant performances of oil displacement compositions in the prior art. The oil displacement composition containing the polyether carboxylate surfactant comprises 1 part by mass of a surfactant; 0-50 parts by mass of a polymer and 0-50 parts by mass of an alkali; when the amount of the polymer and the amount of the alkali are not simultaneously 0, the surfactant is a mixture of the polyether carboxylate surfactant shown as the formula I, an alcohol and a salt in a molar ratio of 1: (1-10): (1-10), X is O, R1 is a C8-C30 aliphatic hydrocarbon group or a C4-C20 straight chain or branched chain saturated and unsaturated alkyl-substituted benzene or naphthalene ring; or R1X is a rosin acid radical. The oil displacement composition containing the polyether carboxylate surfactant well solves the problems of high preparation cost and poor high temperature and high salt resistant performances of the oil displacement compositions in the prior art. The oil displacement composition containing the polyether carboxylate surfactant can be used for improving oil recovery efficiency of high temperature and high salinity sandstone oil reservoirs and used in production. The R1X is (CH2CH2O) m1 (CH3CHCH2O) n (CH2CH2O) m2R2COOM,and shown as the formula I.

Description

technical field [0001] The invention relates to an oil displacement composition containing polyether carboxylate surfactant and a preparation method. Background technique [0002] Chemical flooding is an enhanced measure to enhance oil recovery by adding chemical agents to the aqueous solution to change the physical and chemical properties and rheological properties of the injected fluid and the interaction characteristics with the reservoir rock. It has developed rapidly in my country. Its main The reason is that my country's reservoirs are continental deposits with strong heterogeneity, and the viscosity of continental oil-generating crude oil is higher, which is more suitable for chemical flooding in the EOR method. [0003] Surfactant flooding technology is a method of enhancing oil recovery by adding surfactants into the injected water to improve the oil displacement efficiency by reducing the oil-water interfacial tension and improving the oil washing ability. Polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588
CPCC09K8/584C09K8/588
Inventor 沈之芹李应成王辉辉吴春芳
Owner CHINA PETROLEUM & CHEM CORP
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