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A kind of disulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof

A surfactant and cleaning fracturing fluid technology, applied in chemical instruments and methods, organic chemistry, drilling compositions, etc., can solve the problems of high cost, poor salt resistance, complicated preparation process, etc., and achieve low cost, Excellent salt tolerance and high reaction yield

Active Publication Date: 2022-02-01
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects or deficiencies, the purpose of the present invention is to provide a disulfonic acid-based surfactant, clean fracturing fluid and its preparation method, which can effectively solve the problems of poor salt tolerance and high cost in the existing clean fracturing fluid system. , The problem of complex preparation process

Method used

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  • A kind of disulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof
  • A kind of disulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof
  • A kind of disulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof

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Embodiment 1

[0032] A kind of bissulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof provided in this embodiment 1 specifically include the following processes:

[0033] The preparation of bissulfonic acid-based surfactant includes the following steps:

[0034] Step (1): Dissolve oleic acid amidopropyldimethyl tertiary amine (14.669g, 40mmol) and epichlorohydrin (3.7g, 40mmol) in absolute ethanol, and add hydrochloric acid (1.45g, 40mmol) , the system was always under nitrogen protection, and reacted at 50 °C for 16 hours. After the reaction, the solvent ethanol was removed with a rotary evaporator at 45 °C to obtain intermediate A, which was a pale yellow liquid;

[0035] Step (2): Add Intermediate A (51.52g, 100mmol) and piperazine-N,N'-bis(2-ethanesulfonic acid) sesquisodium salt (134.14 g) obtained in step (1) into a 100ml single-necked flask g, 200 mmol), 100 ml of ethanol was added, and the reaction was refluxed for 18 hours under the condition of 7...

Embodiment 2

[0038] A kind of bissulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof provided in this embodiment 2 specifically include the following processes:

[0039] Step (1): Dissolve erucamidopropyl dimethyl amine (16.908g, 40mmol) and epichlorohydrin (3.7g, 40mmol) in absolute ethanol, and add hydrochloric acid (1.45g, 40mmol), The system was always under nitrogen protection, and the reaction was carried out at 50 °C for 16 hours. After the reaction, the solvent ethanol was removed at 45 °C with a rotary evaporator to obtain intermediate A, which was a pale yellow liquid;

[0040] Step (2): Add Intermediate A (51.52g, 100mmol) and piperazine-N,N'-bis(2-ethanesulfonic acid) sesquisodium salt (134.14 g) obtained in step (1) into a 100ml single-necked flask g, 200 mmol), 100 ml of ethanol was added, and the reaction was refluxed for 18 hours under the condition of 70 ° C; after the reaction, the solvent ethanol was removed at 45 ° C with a rotary evapo...

Embodiment 3

[0043] A kind of bissulfonic acid-based surfactant, clean fracturing fluid and preparation method thereof provided in this embodiment 3 specifically include the following processes:

[0044] The preparation of bissulfonic acid-based surfactant includes the following steps:

[0045] Step (1): Dissolve oleic acid amidopropyldimethyl tertiary amine (14.669g, 40mmol) and epichlorohydrin (3.7g, 40mmol) in absolute ethanol, and add hydrochloric acid (1.45g, 40mmol) , the system was always under nitrogen protection, and reacted at 50 °C for 16 hours. After the reaction, the solvent ethanol was removed with a rotary evaporator at 45 °C to obtain intermediate A, which was a pale yellow liquid;

[0046]Step (2): Add Intermediate A (51.52g, 100mmol) and piperazine-N,N'-bis(2-ethanesulfonic acid) sesquisodium salt (134.14 g) obtained in step (1) into a 100ml single-necked flask g, 200 mmol), 100 ml of ethanol was added, and the reaction was refluxed for 12 hours under the condition of 80...

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Abstract

The invention discloses a disulfonic acid-based surfactant, a clean fracturing fluid and a preparation method thereof. The intermediate A is obtained by using cheap and easy-to-obtain long-chain tertiary amine compounds and epichlorohydrin as raw materials; the intermediate A and Piperazine-N, N'-bis(2-ethanesulfonic acid) sesquisodium salt further makes a double-tailed disulfonic acid group surfactant through quaternization reaction, and the disulfonic acid group surfactant has Good ability to reduce surface activity, and easy to prepare, clean fracturing fluid with it as thickener has excellent salt and temperature resistance, the best product is 120 ℃, 170s ‑1 The shear viscosity is not less than 60mPa·s, far greater than the 25mPa·s required for clean fracturing fluid on-site construction, and has a good application prospect in oilfield fracturing fluid and enhanced oil recovery.

Description

technical field [0001] The invention relates to the technical field of surfactants, in particular to a disulfonic acid-based surfactant, a clean fracturing fluid and a preparation method thereof. Background technique [0002] Clean fracturing fluid, also known as viscoelastic surfactant fracturing fluid (VES) or polymer-free fracturing fluid, is a type of water-based fracturing fluid. In 1997, Schlumberger launched its first product (J508w), which has been rapidly promoted since it was put into the market. At present, multi-well fracturing operations have been successfully implemented, and good economic benefits have been achieved. However, the existing clean fracturing fluids have the problems of poor salt tolerance, high cost and complicated preparation process. [0003] The molecular structure of gemini surfactants is similar to the aggregation of two surfactant molecules, so it is sometimes called dimerized surfactants or twinned surfactants. Commonly used common surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D295/13C09K8/68C09K8/86
CPCC07D295/13C09K8/68C09K8/86C09K2208/30
Inventor 毛金成徐涛毛金桦叶昊杨小江林冲戴思凯
Owner SOUTHWEST PETROLEUM UNIV
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