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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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

Method used

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  • Quaternary ammonium salt type surfactant fracturing fluid
  • Quaternary ammonium salt type surfactant fracturing fluid
  • Quaternary ammonium salt type surfactant fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

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 rea...

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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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.

Description

technical field [0001] The invention relates to a fracturing fluid of a quaternary ammonium salt type viscoelastic surfactant suitable for high-temperature oil and gas reservoir reconstruction. Background technique [0002] Hydraulic fracturing is an effective method to transform oil and gas reservoirs and obtain industrial production capacity. In the process of fracturing construction, the performance of fracturing fluid is directly related to the success or failure of fracturing construction and the effect of post-fracture stimulation. At present, water-based fracturing fluid thickeners are mostly high-molecular substances such as guar gum, hydroxypropyl cellulose, and polyacrylamide. This type of polymer material has poor solubility and dispersibility, and there are many water-insoluble substances. Analysis of the flowback fluid after fracturing operations shows that the fracturing fluid returned to the ground only accounts for 30% to 45% of the pumped volume, and most o...

Claims

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Application Information

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IPC IPC(8): C09K8/68B01F17/18C09K23/18
Inventor 罗平亚张福祥陈洪彭建新叶仲斌朱绕云
Owner PETROCHINA CO LTD
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