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Foam oil displacement agent with oil resistance, and its application

A foam oil displacement and performance technology, applied in the field of foam oil displacement agent, can solve the problems of defoaming, poor oil resistance, unstable in the case of oil, etc., and achieve the effects of improved oil recovery, strong foaming ability, and good oil resistance

Inactive Publication Date: 2014-11-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to solve the problem that the foam used for oil displacement has poor oil resistance, is unstable when encountering oil, and defoaming occurs in a very short time, and cannot form effective plugging in the oil displacement process, thereby providing a kind of Oil-resistant foam oil displacement agent obtained by compounding surfactant and cationic surfactant

Method used

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  • Foam oil displacement agent with oil resistance, and its application
  • Foam oil displacement agent with oil resistance, and its application
  • Foam oil displacement agent with oil resistance, and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare the aqueous solution of the foam oil displacement agent with oil resistance, wherein, the mass concentration of sodium tetradecyl alcohol polyoxyethylene ether carboxylate in the aqueous solution is 1.0‰, and the mass concentration of sodium tetradecyl α-olefin sulfonate is 1.0‰, the mass concentration of cetyltrimethylammonium bromide is 2.0‰ (the mass concentration of cationic surfactant: the mass concentration of anionic surfactant=1:1), the mass concentration of sodium chloride is 0.1‰ , the mass concentration of hydrolyzed polyacrylamide is 0.1‰.

[0045]Take 50mL of the aqueous solution of the above-mentioned foam oil-displacing agent with oil resistance, add 0.5g of crude oil from Shengli Oilfield Sheng 2 District, and ultrasonically disperse for 30 minutes to obtain the oil-water mixture, then pour the oil-water mixture into the air flow method foam apparatus, and keep the temperature at 50°C for 10 Minutes; use a peristaltic pump at a constant speed (10...

Embodiment 2

[0047] Prepare the aqueous solution of the foam oil displacement agent with oil resistance, wherein, the mass concentration of sodium lauryl alcohol polyoxyethylene ether carboxylate in the aqueous solution is 50‰, the mass concentration of sodium dodecyl α-olefin sulfonate is 50‰, the mass concentration of dodecyltrimethylammonium bromide is 2‰ (the mass concentration of cationic surfactant: the mass concentration of anionic surfactant=1:50), the mass concentration of sodium chloride is 15‰ , the mass concentration of calcium chloride is 1‰, and the mass concentration of ethanol is 3‰.

[0048] Take 50mL of the aqueous solution of the above-mentioned foam oil-displacing agent with oil resistance, add 0.5g of crude oil from Shengli Oilfield Sheng 2 District, and ultrasonically disperse for 30 minutes to obtain the oil-water mixture, then pour the oil-water mixture into the air flow method foam apparatus, and keep the temperature at 50°C for 10 Minutes; use a peristaltic pump a...

Embodiment 3

[0050] Prepare an aqueous solution of a foam oil displacement agent with oil resistance, wherein the mass concentration of sodium stearyl polyoxyethylene ether carboxylate in the aqueous solution is 1.7‰, and the mass concentration of sodium cetylsulfonate is 1.7‰, The mass concentration of octadecyltrimethylammonium bromide is 0.9‰ (the mass concentration of cationic surfactant: the mass concentration of anionic surfactant=1:3.8), the mass concentration of sodium chloride is 5‰, the chlorination The mass concentration of calcium is 1.5‰, and the mass concentration of stearyl alcohol is 0.5‰.

[0051] Take 50mL of the aqueous solution of the above-mentioned foam oil-displacing agent with oil resistance, add 0.5g of crude oil from Shengli Oilfield Sheng 2 District, and ultrasonically disperse for 30 minutes to obtain the oil-water mixture, then pour the oil-water mixture into the air flow method foam apparatus, and keep the temperature at 50°C for 10 Minutes; use a peristaltic ...

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Abstract

The invention relates to the technical field of tertiary recovery, and specifically relates to a foam oil displacement agent with oil resistance, and its application. The foam oil displacement agent with oil resistance is obtained by mixing and compounding an anionic surfactant with a cationic surfactant. The foam oil displacement agent with oil resistance has the characteristics of strong foaming capability and good oil resistance. The foam oil displacement agent with oil resistance enables the half life of foam to reach above 60min in the presence of crude oil, and can solve the problems of bad foam oil resistance, no formation of good plugging in present foam oil displacement and extraction processes; and the half life of foam having no oil resistance does not exceed 15min generally. The foam oil displacement agent with oil resistance can be used in the tertiary recovery of oilfields, and improves the recovery efficiency of the crude oil.

Description

technical field [0001] The invention relates to the technical field of tertiary oil recovery, in particular to a foam oil displacement agent with oil resistance and its application. Background technique [0002] With the deepening of oil exploration and development, most of my country's oil fields have entered the stage of high water cut or even extremely high water cut development. How to improve the development effect of these old oil fields and how to improve the oil recovery of oil reservoirs after polymer flooding are becoming more and more important. more and more people's attention and attention. These oil fields are in urgent need of new tertiary oil recovery technology to enhance the recovery of crude oil, so as to increase the recoverable reserves of crude oil. Among them, the low-tension foam flooding technology is the most eye-catching and promising oil recovery technology under the current situation. Volume, so that oil recovery has been greatly improved. Low-...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 赵濉王策宫清涛王其伟李雪松仉莉靳志强
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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