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Thick oil viscosity-reducing synergistic composition and preparation method and application thereof

A composition and viscosity-reducing technology, which is applied in drilling compositions, chemical instruments and methods, and earthwork drilling and mining, can solve the problems of high concentration of chemical agents and low solubilization rate of carbon dioxide, etc., and achieve reduction in dosage and structure Flexible and adjustable, strengthen the effect of interaction

Active Publication Date: 2021-12-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of high concentration of chemical agents and low solubilization rate of carbon dioxide in the prior art, the present invention provides a thick oil viscosity reducing composition

Method used

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  • Thick oil viscosity-reducing synergistic composition and preparation method and application thereof
  • Thick oil viscosity-reducing synergistic composition and preparation method and application thereof
  • Thick oil viscosity-reducing synergistic composition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] [Example 1] Preparation of viscosity-reducing and synergistic composition E01

[0082] ①Add 110.0 g (1 mole) of hydroquinone and 8.8 g of potassium hydroxide to a 2L pressure reactor equipped with a stirring device, and when heated to 80-90°C, turn on the vacuum system and dehydrate under high vacuum for 1 hour. Then replace it with nitrogen for 3 to 4 times, adjust the reaction temperature of the system to 150°C and slowly introduce 350.9 grams (6.05 moles) of propylene oxide, control the pressure ≤ 0.60Mpa, and adjust the temperature to 160°C after the reaction of propylene oxide is completed. Slowly inject 291.6 grams (4.05 moles) of butylene oxide at ℃, and the pressure is ≤0.60Mpa. After the reaction, lower the temperature to 90°C, remove the low boilers in vacuum, neutralize and dehydrate after cooling to obtain hydroquinone polyoxypropylene (6) polyoxybutylene (4) ether (R 1 =R 2 = H, R 3 =CH 3 , R 4 =C 2 h 5 , a=3, b=2, c=0, d=0, j=2) 690.8 g, yield 92.6%...

Embodiment 2

[0085] [Example 2] Preparation of viscosity-reducing synergistic composition E02

[0086] ① Add 110.0 g (1 mole) of hydroquinone and boron trifluoride etherate complex into a three-necked flask with a stirring dropping funnel, and stir evenly. When the temperature was raised to a certain temperature, 203.6 grams (2.2 moles) of epichlorohydrin was slowly added dropwise, and after the drop was completed, it was maintained for another 2 hours. Unreacted epichlorohydrin was distilled off under reduced pressure, and an ethanol solution of sodium hydroxide was added and stirred. Filter to remove the generated sodium chloride, then distill off ethanol and water under reduced pressure, and filter to remove the residual sodium chloride while hot to obtain hydroquinone diglycidyl ether.

[0087] ② Add 222.1 grams (1 mole) of hydroquinone diglycidyl ether and 9.9 grams of potassium hydroxide to a 2L pressure reactor equipped with a stirring device. Dehydrate for 1 hour, then replace wi...

Embodiment 3

[0091] [Example 3] Preparation of viscosity-reducing and synergistic composition E03

[0092] With the method of Example 1, the viscosity-reducing and synergistic composition E03 was prepared, and the composition is shown in Table 1.

[0093] ①Add 318.0 grams (1 mole) of cetylphenol, 5.9 grams of potassium hydroxide and 2.5 grams of potassium carbonate to a 2L pressure reactor equipped with a stirring device, and when heated to 80-90°C, open the vacuum system and Dehydrate under vacuum for 1 hour, then replace with nitrogen for 3 to 4 times, adjust the reaction temperature of the system to 150°C and slowly introduce 176.9 grams (3.05 moles) of propylene oxide, control the pressure ≤ 0.60Mpa, after the reaction of propylene oxide is completed Then adjust the temperature to 140° C. and slowly inject 88.0 g (2.0 moles) of ethylene oxide to make it, and the pressure is ≤0.60 MPa. After the reaction, lower the temperature to 90°C, remove low boilers in vacuum, neutralize and dehyd...

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Abstract

The invention discloses a thick oil viscosity-reducing synergistic composition and a preparation method and application thereof. The thick oil viscosity-reducing synergistic composition comprises at least one of organic matters as shown in a formula (I) and a fat synergist, wherein R1 and R2 are independently selected from hydrogen, C1-C32 alkyl or C1-C32 substituted alkyl, ester group, hydroxyl, amido or alkoxy; R3, R4 and R5 are respectively and independently hydroxyl, hydrogen or alkyl; R6 is selected from C1-C24 alkyl or C1-C24 substituted alkyl; a is equal to 0-50, b is equal to 0-50, c is equal to 0-50, and a, b and c are not 0 at the same time; d is 0 or 1; and j is 0, 1 or 2. The composition provided by the invention is used in the production of heavy oil reservoirs with the formation temperature of 30-100 DEG C and the crude oil viscosity of 30,000-100,000 mPa.s.

Description

technical field [0001] The invention belongs to the field of viscosity reduction of heavy oil, and in particular relates to a viscosity reduction and synergistic composition for heavy oil, a preparation method and application thereof. Background technique [0002] Heavy oil refers to crude oil with high asphaltene and colloid content and high viscosity. Usually the relative density is greater than 0.92g / cm 3 (20°C) and crude oil with an underground viscosity greater than 50mPa·s is called heavy oil, also known as heavy oil. Currently, there are two main mining methods for heavy oil: cold recovery and thermal recovery. The thermal recovery methods include: steam flooding, steam huff and puff, steam assisted gravity drainage (SAGD); and the cold recovery methods include: polymer flooding, surfactant flooding, foam flooding, solvent extraction (VAPEX), microbial flooding, etc. For extra-heavy oil and super-heavy oil with a viscosity greater than 10,000mPa.s, the development ...

Claims

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Application Information

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IPC IPC(8): C09K8/58C09K8/588C08G65/28E21B43/16E21B43/22
CPCC09K8/58C09K8/588C08G65/2612C08G65/2627E21B43/164E21B43/16
Inventor 沈之芹林吉生吴春芳何秀娟
Owner CHINA PETROLEUM & CHEM CORP
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