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Aniline compound-containing surfactant composition for oil displacement, preparation method and application thereof

A technology of surfactant and composition, applied in the field of surfactant composition for oil displacement, can solve the problems of low interface efficiency, poor solubilization ability of crude oil, large adsorption retention, etc., achieve good technical effect and improve crude oil recovery. Yield effect

Pending Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the surfactants in the prior art have poor solubilization ability for crude oil, low interface efficiency, large adsorption and retention, and cannot meet the oil displacement needs of high-temperature and high-salt reservoirs. A new surfactant composition oil displacing agent

Method used

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  • Aniline compound-containing surfactant composition for oil displacement, preparation method and application thereof
  • Aniline compound-containing surfactant composition for oil displacement, preparation method and application thereof
  • Aniline compound-containing surfactant composition for oil displacement, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Surfactant shown in formula (II):

[0099] RO(CHCH 3 CH 2 O) 12 (CH 2 CH 2 O) 2 CH 2 COONa

[0100] where R=iso-C 13 h 27 .

[0101] (1) Add 200 grams (1 mole) of isotridecanol, 4 grams of potassium hydroxide and 2.6 grams of anhydrous potassium carbonate to a pressure reactor equipped with a stirring device, and when heated to a reaction temperature of 80-90 ° C, open Vacuum system, dehydrate under high 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 feed 701.8 grams (12.1 moles) of propylene oxide, control the pressure ≤ 0.50MPa, and wait for the ring to After the reaction of propylene oxide, the temperature was lowered, and 88.0 g (2.0 moles) of ethylene oxide was slowly introduced at 130° C., and the pressure was controlled to be ≤0.60 MPa. After the reaction, the temperature was lowered to 90° C., low boilers were removed in vacuum, neutralized and dehydrated after cooling ...

Embodiment 2

[0104] Surfactant shown in formula (II):

[0105] RO(CH 2 CH 2 O) 2 (CHCH 3 CH 2 O) 12 (CH 2 CH 2 O) 2 CH 2 COOH.N(C 2 h 5 ) 3

[0106] Among them, the carbon chain distribution of R is: C 14 =5.53%, C 16 =62.93%, C 18 = 31.54%.

[0107] (1) Add 248 grams (1 mole) of mixed alcohol (C 14～18 ), 6.5 grams of potassium hydroxide, when heated to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then replace with nitrogen for 3-4 times, adjust the reaction temperature of the system to 140°C and slowly introduce 90.2 gram (2.05 moles) of ethylene oxide, then slowly feed 707.6 grams (12.2 moles) of propylene oxide at 150 °C, control the pressure ≤ 0.60 MPa, and then adjust the temperature to 140 °C slowly after the reaction of propylene oxide Pass 90.2 grams (2.05 moles) of ethylene oxide, and control the pressure to ≤0.40 MPa. After the reaction is over, lower the temperature to 90°C, remove low boilers in a vacuum, neutralize and dehydrat...

Embodiment 3

[0110] Surfactant shown in formula (II):

[0111]

[0112] (1) Add 242 grams (1 mole) of isomeric cetyl alcohol, 8 grams of potassium hydroxide and 5.5 grams of anhydrous potassium carbonate to a 2L pressure reactor equipped with a stirring device, and when heated to 80-90 ° C, turn on the vacuum The system was dehydrated under high vacuum for 1 hour, and then replaced with nitrogen for 3 to 4 times. The reaction temperature of the system was adjusted to 140°C and 178.2 grams (4.05 moles) of ethylene oxide was slowly passed in, and then slowly passed in at 150°C. 350.9 grams (6.05 moles) of propylene oxide, the control pressure is ≤0.60MPa, after the reaction of propylene oxide is completed, adjust the temperature to 140°C and slowly feed 88.0 grams (2.0 moles) of ethylene oxide, the control pressure is ≤0.40MPa . After the reaction was completed, the temperature was lowered to 90°C, low boilers were removed in vacuum, neutralized and dehydrated after cooling to obtain 894...

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Abstract

The invention relates to an aniline compound-containing surfactant composition for oil displacement, a preparation method and application thereof, and mainly solves the problems that the existing surfactant is low in interface efficiency, poor in crude oil solubilizing capacity and large in adsorption retention amount and cannot meet the oil displacement requirement of a high-temperature and high-salt oil reservoir. The surfactant composition for oil displacement comprises the following components: (1) an aniline compound; and (2) a surfactant represented by formula (II); wherein the molar ratio of the aniline compound to the surfactant shown as the formula (II) is 1:(0.05-20); according to the technical scheme, the general molecular formula of the aniline compound is shown as the formula (I), the problems are well solved, and the aniline compound-containing surfactant composition can be used for the production of increasing the crude oil yield in an oil field.

Description

technical field [0001] The invention relates to an aniline compound-containing surfactant composition for oil displacement, a preparation method and application thereof. Background technique [0002] Enhanced oil recovery technology, that is, the enhanced (EOR) and improved (IOR) oil recovery technology commonly referred to abroad, can be summarized as improving water flooding, chemical flooding, heavy oil thermal recovery, gas flooding, microbial oil recovery and physical oil recovery, etc. Six aspects. At present, the enhanced oil recovery technologies that have entered the large-scale application in mines are concentrated in three categories: thermal recovery, gas flooding and chemical flooding. 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 d...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/60C09K8/588C09K8/88C07C41/03C07C43/13C07C43/164C07C67/31C07C69/708C07C51/09C07C51/02C07C59/125C07C67/26C07C69/753C07C303/32C07C309/10E21B43/22C08G65/28C08G65/26C08G65/337
Inventor 沈之芹李应成虞辰敏何秀娟
Owner CHINA PETROLEUM & CHEM CORP
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