Foaming agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof

A high-temperature, high-salt, foaming agent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of low evaluation of foaming agent ability, achieve strong foaming ability, good compatibility, high resistance The effect of salinity

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of low ability evaluation of foaming agents in the prior art, the present invention provides a foaming agent suitable for high-temperature and high-salt oil reservoirs and its preparation method

Method used

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  • Foaming agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof
  • Foaming agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 300g of alkyl sulfonate (carbon number 12 to 14) into the reaction kettle, start the agitator and keep the temperature at 30°C, add 100g of distilled water while stirring, and then add 50g of foam stabilizer alkyl amine oxide (carbon number tens 2-16), adjust the pH value to 7 with hydrochloric acid, and stop heating and stirring after fully mixing. After standing and settling, the foaming agent product is obtained.

Embodiment 2

[0042] Add 150kg of alkyl sulfonate (15-16 carbons) into the reaction kettle, start the agitator and keep the temperature at 60°C, and add 30kg of foam stabilizer alkyl amine oxide (12-16 carbons) while stirring , then add 100kg distilled water, stop heating and stirring after fully mixing. After standing and settling, the foaming agent product is obtained.

Embodiment 3

[0044] Add 250g of alkyl sulfonate (carbon number 12 to 16) into the reaction kettle, start the agitator and keep the temperature at 70°C, add 100g of distilled water while stirring, then add 50g of sodium chloride, 70g of foam stabilizer alkyl oxidation Amines (carbon number 12-16), adjust the pH value to 8 with hydrochloric acid. Stop heating and stirring after fully mixing. After standing and settling, the foaming agent product is obtained.

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Abstract

The invention discloses a foaming agent suitable for a high-temperature and high-salinity oil reservoir and a preparation method thereof. The foaming agent includes 50-70 wt% of alkyl sulfonate, 10-15 wt% of alkyl amine oxide, and the balance distilled water; the pH value of the foaming agent is 7-9. The method includes the steps: successively adding alkyl sulfonate, alkyl amine oxide and distilled water into a reaction kettle while stirring, and mixing uniformly to obtain the foaming agent, wherein the temperature of the reaction kettle is 30-70 DEG C. The foaming agent has the advantages of strong foaming ability, high salinity resistance, high calcium and magnesium ion resistance and good compatibility with formation water.

Description

technical field [0001] The invention relates to the field of foaming agents for oil fields, and more particularly relates to a foaming agent suitable for high-temperature and high-salt oil reservoirs and a preparation method thereof. Background technique [0002] In 2008, Sinopec Chemical Flooding Potential Resource Evaluation Group III high-temperature and high-salt reservoirs (original formation temperature ≤ 95 °C, formation water salinity ≤ 100,000 mg / L) had 464.79 million tons of geological reserves, accounting for 32.9% of the total geological reserves. It plays a pivotal role in China's crude oil production and reserves, but the current recovery level is low, only about 30%. Due to the insufficient temperature and salt resistance of polymers, it is difficult for polymer flooding and binary flooding to achieve the purpose of improving oil recovery in Type III high-temperature and high-salt reservoirs, and the progress of polymers suitable for chemical flooding in Type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 周国华吕成远王海波马涛谭中良王强海玉芝
Owner CHINA PETROLEUM & CHEM CORP
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