Penetration enhancer for fracturing as well as preparation method and application thereof

A permeation enhancer and fracturing technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low imbibition capacity and permeation enhancement capacity of chemical agents, and achieve high imbibition capacity and high permeation enhancement ability. ability, the effect of low interfacial tension

Active Publication Date: 2022-04-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of permeation enhancer for fracturing and its preparation method and application, in order to solve the existing Technical problem of low chemical imbibition capacity and permeation enhancement capacity

Method used

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  • Penetration enhancer for fracturing as well as preparation method and application thereof
  • Penetration enhancer for fracturing as well as preparation method and application thereof
  • Penetration enhancer for fracturing as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a permeation enhancer for fracturing, comprising the following steps:

[0039] Mix 9.7g of sulfamic acid and 45.8g of polyoxyethylene (n=10) in 429.0g of solvent dimethylformamide for the first reaction, raise the temperature to 95°C, and react for 2h to obtain a mixed solution. After the reaction is over, control the temperature at 30°C, then add 30.3 g of octadecyl chloride to the reacted mixed solution for the second reaction, react for 4 hours, obtain the reaction solution, concentrate the reaction solution, and use toluene column chromatography The product was purified and separated by the method, and vacuum-dried to constant weight to obtain a permeation enhancer for fracturing, which is polyoxyethylene octadecyl amidosulfonate.

Embodiment 2

[0041] A method for preparing a permeation enhancer for fracturing, comprising the following steps:

[0042] Mix 9.7g of sulfamic acid and 45.8g of polyoxyethylene (n=10) in 415.0g of solvent dimethylformamide for the first reaction, raise the temperature to 95°C, and react for 2h to obtain a mixed solution. After the reaction is finished, control the temperature at 30°C, then add 27.5 g of octadecyl chloride to the reacted mixed solution for the second reaction, react for 4 hours, obtain the reaction solution, concentrate the reaction solution, and use toluene column chromatography The product was purified and separated by the method, and vacuum-dried to constant weight to obtain a permeation enhancer for fracturing, which is polyoxyethylene octadecyl amidosulfonate.

Embodiment 3

[0044] A method for preparing a permeation enhancer for fracturing, comprising the following steps:

[0045] Mix 10.7g of sulfamic acid and 45.8g of polyoxyethylene (n=10) in 520.8g of solvent dimethylformamide for the first reaction, raise the temperature to 90°C, and react for 2h to obtain a mixed solution. After the reaction is over, control the temperature at 25°C, then add 30.3g of octadecyl chloride to the reacted mixed solution for the second reaction, react for 3 hours, and obtain the reaction solution, concentrate the reaction solution, and use toluene column chromatography The product was purified and separated by the method, and vacuum-dried to constant weight to obtain a permeation enhancer for fracturing, which is polyoxyethylene octadecyl amidosulfonate.

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Abstract

The invention discloses a permeability enhancer for fracturing as well as a preparation method and application thereof, belongs to the technical field of oil and gas resource exploitation, and solves the technical problem that an existing chemical agent is low in imbibition capacity and permeability enhancing capacity. The preparation method of the permeability enhancer for fracturing comprises the following steps: firstly, mixing polyoxyethylene and refined powdery sulfamic acid in a solvent dimethylformamide to carry out first-step esterification reaction; and adding a certain amount of long-chain alkyl acyl chloride into the reaction liquid to carry out a second-step reaction, thereby finally obtaining the permeability enhancer for fracturing. The permeability increasing agent for fracturing is neutral at the initial stage of dissolution, can uniformly and stably exist in a solution, can play a wetting role due to low interfacial tension, has obvious capillary self-absorption capacity, and is a permeability increasing agent for fracturing with excellent functions.

Description

technical field [0001] The invention belongs to the technical field of oil and gas resource exploitation, and in particular relates to a permeation enhancer for fracturing, a preparation method and application thereof. Background technique [0002] Unconventional oil and gas, such as tight oil, shale oil, and shale gas, are one of the main sources of energy in the world. After more than ten years of continuous exploration evaluation and technical preparations, the discovery of unconventional oil and gas exploration has achieved from point to point. A breakthrough from quantitative change to qualitative change. Unconventional oil and gas has become one of the most important main resources for increasing oil and gas reserves and production. However, the overall resource grade of unconventional oil and gas resources is low, the reservoirs are tight, the geological structure is relatively complex, and the characteristics of low porosity and low permeability greatly affect the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/88C08G65/338C08G65/332C08G65/326
Inventor 王晨马倩张康杨晓武代方方王海花
Owner SHAANXI UNIV OF SCI & TECH
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