Surfactant for fracturing fluid and preparation method and fracturing fluid thereof

A technology of surfactant and fracturing fluid, which is applied in the field of fracturing fluid, can solve the inconvenience of fracturing fluid and other problems, and achieve the effects of convenient liquid preparation, no pre-allocation process, and stable performance

Active Publication Date: 2013-09-11
四川安东油气工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This shows that the above-mentioned existing fracturing fluid obviously still has inconvenience and defects in use, and needs to be further improved urgently

Method used

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  • Surfactant for fracturing fluid and preparation method and fracturing fluid thereof
  • Surfactant for fracturing fluid and preparation method and fracturing fluid thereof
  • Surfactant for fracturing fluid and preparation method and fracturing fluid thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In a 250mL three-necked grinding flask with a condensing reflux tube, add sinapinic acid and N,N-dimethylpropylamine to carry out amidation condensation reaction, use potassium hydroxide as a catalyst, stir and reflux, react for 7 hours, and the reaction temperature is At 150°C, the intermediate product tertiary amine was obtained.

[0034] Add dichloroethane to the above-mentioned intermediate product tertiary amine to carry out chain splicing reaction, stir and reflux, react for 3 hours, and the reaction temperature is 125° C. to obtain the intermediate product spliced ​​chain tertiary amine.

[0035] Add the prepared intermediate tertiary chain amine and an appropriate amount of isopropanol into a three-necked flask, add the pre-neutralized sodium chloroacetate solution in portions, stir and reflux, and react at 75°C for 5 hours to obtain a yellow to brown viscous Liquid, the mass percentage of active ingredients is 49%-51%. The structural formula of the active ingr...

Embodiment 2

[0039] Fracturing fluid, composed of the following components by mass percentage:

[0040] Surfactant 1.0%

[0041] Potassium chloride 12.0%

[0042] Water 87%, wherein surfactant is the tensio-active agent that embodiment one gains.

[0043] The fracturing fluid obtained in this example was subjected to a performance test at 80°C, and the results are shown in Table 1:

[0044] Table 1 Example 2 obtained fracturing fluid performance test

[0045] serial number

Embodiment 3

[0047] Fracturing fluid, composed of the following components by mass percentage:

[0048] Surfactant 2.0%

[0049] Potassium chloride 10.0%

[0050] Water 88%, wherein surfactant is the surfactant obtained in embodiment one.

[0051] The fracturing fluid obtained in this example was subjected to a performance test at 100°C, and the results are shown in Table 2:

[0052] Table 2 Performance test of fracturing fluid obtained in Example 3

[0053] serial number

[0054] 6

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Abstract

The invention discloses a surfactant for a fracturing fluid and a preparation method and the fracturing fluid thereof, wherein the surfactant is a multi-branched twin-chain ampholytic surfactant, the structural formula of which is as follows: FORMULA, wherein R is a linear or branched alkyl of C13-C21, n is an integer from 3 to 6 and p is an integer from 2 to 4. The fracturing fluid prepared by the surfactant disclosed by the invention is low in cost and high in temperature resistance.

Description

technical field [0001] The invention relates to the field of fracturing fluid technology, in particular to a surfactant for fracturing fluid used in the development process of oil and gas wells, a preparation method thereof and a fracturing fluid. Background technique [0002] Hydraulic fracturing has been used as a stimulation measure for oil and gas reservoirs for nearly 50 years. It utilizes relatively high displacement and pressure to inject non-Newtonian high-viscosity fracturing fluid containing high-concentration proppant downhole, so as to create fractures in the target layer and extend and expand fractures. When the fracturing fluid breaks and flows back, one or more propped fractures with high conductivity can be formed. Hydraulic fracturing, as an important measure to transform oil and gas layers and increase production and injection of oil, gas and water wells, has been widely used in various oil fields in my country. One of the outstanding characteristics of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C07C233/38C07C231/12
Inventor 徐太平方也王鹏
Owner 四川安东油气工程技术服务有限公司
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