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A kind of acid-resistant foam anti-channeling agent and preparation method thereof

A technology of anti-channeling agent and foam stabilizer, which is applied in the field of acid-resistant foam anti-channeling agent and its preparation, can solve the problems of affecting the development effect of gas injection, low viscosity, and the decrease of gas sweeping volume, etc., to achieve enhanced foaming performance, high Effects of foamability and high thermal stability

Active Publication Date: 2021-01-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to CO 2 The viscosity is small, and the viscous fingering phenomenon (gas channeling) is more likely to occur than water. After a long time of injection, the gas channeling phenomenon is more serious, resulting in a decrease in the volume of gas sweeping, which seriously affects the development effect of gas injection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides an acid-resistant foam anti-channeling agent. Based on the total weight of the acid-resistant foam system, its raw material composition includes: 10% betaine, 30% α-olefin sulfonate, non-ionic fluorocarbon surface Active agent 30%, non-ionic fluoropolymer foam stabilizer 1.5%, balance water.

[0031] The acid-resistant foam is prepared by the following method: the quantitative water is divided into two parts, based on the total mass of the acid-resistant foam, first add 10% betaine and 30% α-olefin to one part of water Sulfonate and 30% non-ionic fluorocarbon surfactant, stirred and dissolved in an environment of 40-45°C to obtain the first solution; then take another part of water, add 1.5% in an environment of 50-55°C The non-ionic fluoropolymer foam stabilizer Intechem14007 was stirred and dissolved to obtain the second solution; the first and second two solutions were mixed under the environment of 40-45°C, and the finished product was acid-...

Embodiment 2

[0038] This embodiment provides an acid-resistant foam anti-channeling agent. Based on the total weight of the acid-resistant foam system, its raw material composition includes: 20% betaine, 20% α-olefin sulfonate, non-ionic fluorocarbon surface Active agent 30%, non-ionic fluoropolymer foam stabilizer 2.0%, balance water.

[0039]The acid-resistant foam is prepared by the following method: the quantitative water is divided into two parts, based on the total mass of the acid-resistant foam, first add 20% betaine and 20% α-olefin to one part of water Sulfonate and 30% non-ionic fluorocarbon surfactant, stirred and dissolved in an environment of 40-45°C to obtain the first solution; then take another part of water, add 2.0% in an environment of 50-55°C The non-ionic fluoropolymer foam stabilizer Intechem14007 was stirred and dissolved to obtain the second solution; the first and second two solutions were mixed under the environment of 40-45°C, and the finished product was acid-r...

Embodiment 3

[0045] This embodiment provides an acid-resistant foam anti-channeling agent, based on the total weight of the acid-resistant foam system, its raw material composition includes: 25% betaine, 20% α-olefin sulfonate, non-ionic fluorocarbon surface Active agent 25%, non-ionic fluorine-containing polymer foam stabilizer 3.0%, and the balance is water.

[0046] The acid-resistant foaming agent is prepared by the following method: the quantitative water is divided into two parts, based on the total mass of the acid-resistant foaming agent prepared, first add 25% betaine and 20% alpha-olefin to one part of water Sulfonate and 25% non-ionic fluorocarbon surfactant, stirred and dissolved in an environment of 40-45°C to obtain the first solution; then take another part of water, add 3.0% in an environment of 50-55°C The non-ionic fluoropolymer foam stabilizer Intechem14007 was stirred and dissolved to obtain the second solution; the first and second two solutions were mixed under the en...

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Abstract

The invention provides an acid-resistant anti-migration additive and a preparation method thereof. The acid-resistant anti-migration additive comprises the following components in percentage by mass:10-25% of betaine surfactant, 20-35% of alpha-olefin sulfonate, 25-35% of nonionic fluorocarbon surfactant, 1-5% of nonionic fluoropolymer foam stabilizer and the balance of water. The acid-resistantanti-migration additive can be used for plugging a carbon dioxide driving gas migration layer, and the highest underground acidity can reach the level that pH is equal to 3 in a carbon dioxide drivingprocess.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to an acid-resistant foam anti-channeling agent and a preparation method thereof. Background technique [0002] The effective development of low-permeability and ultra-low-permeability reservoirs plays a vital role in stabilizing and increasing crude oil production in my country. However, due to the poor water absorption capacity and high injection pressure of low-permeability reservoirs, it is very easy to fail to inject, and the water flooding effect is not good. As a result, the average recovery rate of low-permeability reservoirs is only about 20%, which is far lower than The recovery rate of medium and high permeability reservoirs (water flooding and chemical flooding can reach about 60%). Therefore, the research and application of gas flooding enhanced oil recovery technology will become an important topic in the development of low-permeability, ultra-low-permeab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/493C09K8/594
CPCC09K8/493C09K8/594
Inventor 郭东红杨晓鹏孙建峰侯庆锋崔晓东
Owner PETROCHINA CO LTD
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