Oil displacement aid and its preparation method and application

A technology of drainage aid and oil displacement, which is applied in the preparation of ether, sulfonic acid, and sulfate, etc., and can solve the problems of limited and poor development effect.

Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an oil displacement aid drainage agent and its preparation method and application, to solve the limited ability of the oil displacement aid drainage agent in the prior art to solve the problem of poor development effect after multi-cycle steam stimulation oil recovery question

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  • Oil displacement aid and its preparation method and application
  • Oil displacement aid and its preparation method and application
  • Oil displacement aid and its preparation method and application

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preparation example Construction

[0020] In a typical embodiment of the present application, a method for preparing an oil-displacing aid is provided, the preparation method comprising: step S1, mixing coniferyl alcohol, ethylene oxide and a first solvent under alkaline conditions The ring-opening reaction is carried out to obtain a ring-opening compound; in step S2, the ring-opening compound, SO 3 and a second solvent to carry out sulfonation reaction to obtain a sulfonate compound; step S3, mixing the sulfonate compound and a surface active substance to obtain an oil displacement aid; wherein, the surface active substance is a fluorocarbon surfactant and carbonic acid The mixture of ammonium hydrogen, the ring-opening compound and the sulfonate compound respectively have the following structural formulas:

[0021]

[0022] M + is a monovalent cation.

[0023] The application utilizes coniferyl alcohol and ethylene oxide in alkaline conditions (M + Ring-opening reaction occurs under the cation from basi...

Embodiment 1

[0039] Take 1 g of coniferyl alcohol, 2 g of ethylene oxide, and 0.1 g of sodium hydroxide in a 25 mL three-necked flask, add 10 mL of dioxane solvent, and carry out a ring-opening reaction at 80 ° C for 5 h. At room temperature, water was added for 3 washings to obtain a product system containing the ring-opening compound; the product system containing the ring-opening compound was mixed with 0.5 g SO 3 , 10mL of dioxane solvent was subjected to sulfonation reaction at room temperature for 6h, and then extracted to obtain sodium sulfonate compound; 0.1g of fluorocarbon surfactant and 2g of ammonium bicarbonate were mixed uniformly to obtain a surface active substance, and then 0.3 g of sodium sulfonate compound and 0.2 g of surface active substance were mixed uniformly to obtain oil displacement aid 1.

Embodiment 2

[0041] Take 1 g of coniferyl alcohol, 1 g of ethylene oxide, 0.15 g of sodium hydroxide, and carry out a ring-opening reaction at 85 ° C for 4 hours. After the temperature of the system is lowered to room temperature, water is added and washed three times to obtain a ring-opening reaction containing The product system of the compound; the product system containing the ring-opening compound is obtained; the obtained product system containing the ring-opening compound is mixed with 1 g SO 3 , 10mL of dioxane solvent was subjected to sulfonation reaction at room temperature for 4h, and then extracted to obtain sodium sulfonate compound; 0.1g of fluorocarbon surfactant and 2g of ammonium bicarbonate were mixed uniformly to obtain a surface active substance, and then Take 0.3 g of sodium sulfonate compound and 0.2 g of surface active substance and mix it uniformly to obtain oil displacement aid 2.

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Abstract

The invention provides an oil-displacing aid and a preparation method and application thereof. The preparation method includes step S1, performing a ring-opening reaction with coniferyl alcohol, ethylene oxide and a first solvent under alkaline conditions to obtain a product system comprising a ring-opening compound; 3 and a second solvent for sulfonation reaction to obtain a sulfonate compound; and step S3, mixing the sulfonate compound and a surface active substance to obtain an oil-displacing aid; wherein, the surface active substance is a fluorocarbon surfactant and a surface active substance. The mixture of ammonium bicarbonate, the ring-opening compound and the sulfonate compound respectively have the following structural formulas: M + is a monovalent cation. In addition, the method is simple and low in cost, and has a remarkable effect of solving the deterioration of the recovery effect of multi-cycle steam huff and puff.

Description

technical field [0001] The invention relates to the technical field of petroleum development, and relates to an oil displacement aid and a preparation method and application thereof. Background technique [0002] The steam huff and puff technology is one of the important technologies for the development of heavy oil reservoirs. However, when the heavy oil reservoir undergoes multi-cycle steam huff and puff oil recovery, the formation pressure drops greatly and the underground water storage volume is large, which makes the thermal efficiency of injected steam worse, resulting in a long recovery period of water, a decrease in the oil-steam ratio, and a more and more efficient recovery effect. Therefore, how to further improve the development effect of multi-cycle steam huff and puff in heavy oil reservoirs and improve the recovery factor in the huff and puff stage is an urgent problem to be solved. [0003] Adding oil displacement aids at the same time of steam stimulation is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C07C41/03C07C41/26C07C43/23C07C303/24C07C305/06C07C303/06C07C309/09E21B43/22E21B43/24
CPCC09K8/584C07C41/03C07C41/26C07C303/24C07C303/06E21B43/16E21B43/24C07C43/23C07C305/06C07C309/09
Inventor 郑爱萍陈宏飞宋栋刘泠杉蒙延冲高军敬思伟董文波于岐
Owner PETROCHINA CO LTD
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