Quaternary ammonium salt type surfactant fracturing fluid

A technology of surfactant and quaternary ammonium salt, which is applied in the field of quaternary ammonium salt type viscoelastic surfactant fracturing fluid, can solve problems such as difficult to meet the effective development of oil and gas reservoirs, and achieve easy industrial production, mild reaction conditions, and a preparation method simple effect

Active Publication Date: 2011-09-14

PETROCHINA CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0008] High-temperature oil and gas reservoirs are widely distributed in my country, and the oil and gas reserves are very ric...

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Abstract

The invention relates to a quaternary ammonium salt type surfactant fracturing fluid which is prepared from the following components in percentage by weight: 0.1-7% of double ionic head group/three ionic head group/four ionic head group quaternary ammonium salt type surfactant, 0.1-2% of salt and the balance of water. The quaternary ammonium salt type surfactant belongs to an amphiphilic structure surfactant; the preparation method is simple, has the advantage of mild reaction conditions, and can easily implement industrial production; and the surfactant has obvious viscoelasticity in a dilute solution, is a low-molecular thickening agent with excellent properties, and can satisfy the demands for high-temperature oil-gas reservoirs of which the oil reservoir temperature is 120 DEG C.

Application Domain

Transportation and packagingMixing +2

Technology Topic

AmmoniumViscoelasticity +4

Image

$Quaternary ammonium salt type surfactant fracturing fluid$
$Quaternary ammonium salt type surfactant fracturing fluid$
$Quaternary ammonium salt type surfactant fracturing fluid$

Examples

Experimental program(16)

Example Embodiment

[0037] Example 1

[0038] (1) Synthesis of double ion head-based surfactants

[0039] Take 1 mol of 1,4-butanediamine, 2 mol of formic acid, and 2 mol of formaldehyde in the reaction kettle and react at 70° C. for 8 hours. After the reaction, cool to room temperature. Then, 2 mol of chlorooctadecane was added to the reaction kettle and reacted at 80° C. for 8 hours to obtain a white paste product, numbered De-18-4.

[0040] (2) Synthesis of tri-ion head-based surfactant

[0041] Take 1 mol of dialkylene triamine, 5 mol of formic acid, and 5 mol of formaldehyde in a reaction kettle, and react at 70° C. for 8 hours. After the reaction, cool to room temperature. Then, 3 mol of chlorododecane was added to the reaction kettle and reacted at 80° C. for 8 hours to obtain a white paste product, numbered Tr-12-2.

[0042] (3) Synthesis of tetra-ion head-based surfactant

[0043] Take 1 mol of trialkylene tetraamine, 7 mol of formic acid, and 7 mol of formaldehyde in the reaction kettle, and react at 70° C. for 8 hours. After the reaction, cool to room temperature. Then, 4 mol of chlorododecane was added to the reaction kettle and reacted at 80° C. for 8 hours to obtain a white paste product, numbered Te-12-2.

Example Embodiment

[0044] Example 2

[0045] The high temperature resistant viscoelastic surfactant fracturing fluid is composed of: De-18-4 surfactant with a concentration of 4.5%, 0.5% ammonium chloride, 1% potassium chloride, 0.4% methyl Sodium benzene sulfonate and the balance of water.

Example Embodiment

[0046] Example 3

[0047] The high temperature resistant viscoelastic surfactant fracturing fluid is composed of 3.5% Tr-14-2, 0.5% sodium chloride, 0.1% salicylic acid, 0.1% potassium benzene sulfonate, 0.1% Ammonium benzenesulfonate and the balance water.

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PUM

Description & Claims & Application Information

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