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A kind of high-temperature oil-based foaming agent for oil products and preparation method thereof

A high-temperature oil and foaming agent technology, applied in the field of drilling, can solve the problems of high price, high cost of use, and high price, and achieve the effects of easy large-scale use, good foam stability, and low manufacturing cost

Inactive Publication Date: 2015-11-25
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fluorine-containing surfactants have the disadvantage of being expensive, and generally can only be used in special occasions, and there is a problem of high cost in large-scale use; and the price of silicone surfactants is also relatively high, and this type of surfactant The stability of the agent is relatively poor, and its use is also limited

Method used

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  • A kind of high-temperature oil-based foaming agent for oil products and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation step of oil-based foam stabilizer (polyhydric fatty acid alkanolamide C m h n [CON(C 2 h 4 Oh) 2 ] x and polybasic fatty acid alkanolamide ether C m h n [CON(C 2 h 4 Oh) y ] x Both can be used as foam stabilizers, among which polybasic fatty acid alkanolamide C m h n [CON(C 2 h 4 Oh) 2 ] x It is produced through a 2-step reaction; while the polybasic fatty acid alkanolamide ether C m h n [CON(C 2 h 4 Oh) y ] x Polybasic fatty acid alkanolamide C m h n [CON(C 2 h 4 Oh) 2 ] x It is made from raw materials, so it needs 3 steps of reaction), specifically including:

[0018] 1) Add 200g of dibasic acid (M=260), 80g of anhydrous methanol, and 1g of concentrated sulfuric acid in sequence in a 500mL glass reactor, slowly raise the temperature to 85-90°C under stirring conditions, keep the temperature for 0.5h, and then pour into the reactor Add 70g of anhydrous methanol to the medium, keep the temperature for 1h, raise the temperature...

Embodiment 2

[0022] Heat 200 g of lauryl sulfonic acid to 45°C, slowly add 100 g of the polybasic fatty acid alkanolamide synthesized in Example 1 under stirring conditions, and cool down to room temperature to obtain the product—high temperature oil-based foaming agent.

Embodiment 3

[0024] Heat 270g of alkylphenyl sulfonic acid to 50°C, slowly add 140g of polybasic fatty acid alkanolamide synthesized in Example 1 under stirring conditions, and cool down to room temperature to obtain the product—high temperature oil-based foam.

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Abstract

The invention discloses a high-temperature oil-based foaming agent for an oil product and a preparation method thereof. The preparation method comprises the following steps of: weighing a certain amount of an oil-based foaming agent, heating to 45-65 DEG C, stirring at high speed, slowly adding an oil-based foam stabilizer, and cooling to room temperature to obtain the target product, namely the high-temperature oil-based foaming agent. By the selection of a traditional surfactant and the addition of an oil-soluble polymer, the high-temperature oil-based foaming agent with strong foaming power and good foaming stability is obtained. The foaming agent requires low manufacturing cost and is easy to use at large scale.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a high-temperature oil-based foaming agent used in oil products and a preparation method thereof. Background technique [0002] When drilling in oil and gas reservoirs with low pressure, low permeability, easy leakage and unstable well wall, the commonly used drilling fluid is low-density water-based foam. Although water-based foam drilling fluid has been widely used in controlling fluid loss, reducing differential pressure sticking, and preventing leakage and plugging, it still cannot effectively solve the problem of reservoir damage when drilling into water-sensitive formations. Now foreign countries have begun to try to use it. Although some progress has been made in oil-based foam fluid, there are still problems such as low oil foaming efficiency, unstable oil-based foam system, poor temperature resistance, and weak anti-pollution ability. It is a high-temperature resistant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/38
Inventor 王富华王瑞和张德文张德武谭学超张忻
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)