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Foam stabilizing technology for preparing foam-like fracturing fluid

A foam fracturing fluid and foam stabilization technology, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problem that the reaction of gas heat generating agent is difficult to control, affects the application range of a foam-like fracturing system, and cannot meet construction requirements. and other problems, to achieve the effects of controllable foaming time, improved performance, and increased foam stabilization ability.

Inactive Publication Date: 2013-08-28
四川省博仁达石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing foam-like fracturing system has the problem that the reaction of the gas and heat generating agent is difficult to control, which affects the application range of the foam-like fracturing system. Especially when the temperature is higher than 100°C, the maximum foam and foam stabilization time are only half an hour according to the existing formula. Left and right, can not meet the construction requirements

Method used

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  • Foam stabilizing technology for preparing foam-like fracturing fluid

Examples

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Effect test

Embodiment 1

[0041] A foam stabilizing process for preparing foam-like fracturing fluid, which comprises the following steps:

[0042] S1. Add a foam stabilizer to the foam-like fracturing fluid base fluid, and the amount of the foam stabilizer added is 1% of the base fluid weight;

[0043] S2. During the use of the foam-like fracturing fluid, acid catalyst A is added to the acidic liquid of the foam-like fracturing fluid, and the amount of acid catalyst A added is 3% of the weight of the acidic liquid.

[0044] It also includes a step for preparing a foam stabilizer, and the preparation method of the foam stabilizer is:

[0045] A1. Weigh the fatty alcohol polyoxyethylene ether and the sulfonating agent in a molar ratio of 1:1 for later use, add the weighed fatty alcohol polyoxyethylene ether into a clean 250ml three-necked flask, and raise the temperature to 85°C under stirring ;

[0046] A2. Slowly add the weighed sulfonating agent into the above-mentioned three-necked flask filled wi...

Embodiment 2

[0055] A foam stabilizing process for preparing foam-like fracturing fluid, which comprises the following steps:

[0056] S1, adding a foam stabilizer to the foam-like fracturing fluid base fluid, the amount of the foam stabilizer added is 0.5% of the base fluid weight;

[0057] S2. During the use of the foam-like fracturing fluid, acid catalyst A is added to the acidic liquid of the foam-like fracturing fluid, and the amount of acid catalyst A added is 1.0% of the weight of the acidic liquid.

[0058] It also includes a step for preparing a foam stabilizer, and the preparation method of the foam stabilizer is:

[0059] A1. Weigh the fatty alcohol polyoxyethylene ether and the sulfonating agent in a molar ratio of 1:1 for later use, add the weighed fatty alcohol polyoxyethylene ether into a clean 250ml three-necked flask, and raise the temperature to 80°C under stirring ;

[0060] A2. Slowly add the weighed sulfonating agent into the above-mentioned three-necked flask filled...

Embodiment 3

[0069] A foam stabilizing process for preparing foam-like fracturing fluid, which comprises the following steps:

[0070] S1. Adding a foam stabilizer to the base fluid of the foam-like fracturing fluid, the amount of the foam stabilizer added is 0.5-1.5% of the weight of the base fluid;

[0071] S2. During the use of the foam-like fracturing fluid, acid catalyst A is added to the acidic liquid of the foam-like fracturing fluid. The amount of acid catalyst A added is 1.0-5.0% by weight of the acidic liquid.

[0072] It also includes a step for preparing a foam stabilizer, and the preparation method of the foam stabilizer is:

[0073] A1. Weigh the fatty alcohol polyoxyethylene ether and the sulfonating agent in a molar ratio of 1:1 for later use, add the weighed fatty alcohol polyoxyethylene ether into a clean 250ml three-necked flask, and raise the temperature to 80°C under stirring ~90°C;

[0074] A2. Slowly add the weighed sulfonating agent into the above-mentioned three-...

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Abstract

The invention discloses a foam stabilizing technology for preparing a foam-like fracturing fluid, comprising the following steps of: S1. adding a foam stabilizing agent into a base fluid of the foam-like fracturing fluid, wherein an addition amount of the foam-like fracturing fluid is 0.5-1.5% of weight of the base fluid; and S2. in a using process of the foam-like fracturing fluid, adding an acidic catalyst A into an acidic solution of the foam-like fracturing fluid, wherein the addition amount of the acidic catalyst A is 1.0-5.0% of the weight of the acidic solution. The beneficial effects comprises: the foam stabilizing technology can control a foaming speed of a system under a high temperature condition, can increase a foam stabilizing capability, and can raise bubble stability, the foam stabilizing capability delays to more than 2-3h, foam stabilizing time is substantially increased, the foam state can be maintained for a long time, superpower liquid-carrying and de-filtration capabilities can be continuously performed, and the usage performance of the fracturing fluid is raised. By adding the 1.0-5.0% acidic catalyst A to the acidic solution, largest continuous foaming time of the foam-like fracturing fluid reaches 8h, and foaming time is controllable.

Description

technical field [0001] The invention relates to a foam-like fracturing system, in particular to a foam-stabilizing process for preparing a foam-like fracturing fluid. Background technique [0002] Foam-like fracturing fluid is a new type of fracturing fluid system between conventional water-based fracturing fluid and foam fracturing fluid. It is a new type of fracturing fluid system with ideal technical and economic comprehensive benefits. This system is made up of two parts, and one part is base liquid, and another part is acidic liquid, and the composition of base liquid is: gas heat generating agent, hydroxypropyl guanidine gum, clay stabilizer, drainage aid, gel breaker, bactericide, Sodium carbonate; acidic liquid consists of: corrosion inhibitor, acidic catalyst and foam stabilizer. [0003] The foam-like fracturing system introduces the self-foaming pressurizer into the conventional guar gum fracturing fluid system, and generates a large amount of inert gas through ...

Claims

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Application Information

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IPC IPC(8): C09K8/74
Inventor 康毅张绍斌唐朝均杨延波
Owner 四川省博仁达石油科技有限公司
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