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A high-efficiency and environment-friendly slippery water fracturing fluid drag reducer and preparation method thereof

A technology of hydraulic fracturing and drag reducing agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor salt/calcium resistance, easy delamination, and decreased drag reduction ability, and achieve improved Activity and temperature application range, good economy and popularization, and the effect of increasing drag reduction rate

Active Publication Date: 2021-05-07
大庆玮德化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the construction process, it is this large liquid volume and flow rate that will cause the polymer substances in the drag reducer to be sheared, resulting in a decrease in molecular weight, resulting in a decrease in drag reduction capacity
In addition, commercially available slick water fracturing fluids face problems such as difficulty in dissolution, poor stability, easy delamination, and incompatible components. Poor anti-calcium performance, complex preparation method and other problems

Method used

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  • A high-efficiency and environment-friendly slippery water fracturing fluid drag reducer and preparation method thereof
  • A high-efficiency and environment-friendly slippery water fracturing fluid drag reducer and preparation method thereof
  • A high-efficiency and environment-friendly slippery water fracturing fluid drag reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw materials are weighed according to the composition of the following parts by weight:

[0033]

[0034] The preparation method comprises the following steps:

[0035] Step 1), according to the weighing direction of raw materials, first pour 1-vinyl-3-ethylimidazole bistrifluoromethanesulfonimide salt into the supergravity reactor, and then pour it into the supergravity reactor Add acrylamide, methyl acrylate and sodium vinyl sulfonate, stir and mix well;

[0036] Step 2), feed nitrogen from the bottom of the supergravity reactor, make nitrogen replace the oxygen in the oxygen in the supergravity reactor and the oxygen in the solution configured in the step 1), make the inside of the supergravity reactor The mass concentration of oxygen is lower than 100ppm;

[0037]Step 3), keep the nitrogen atmosphere of the supergravity reactor, continue to add Span-60, Gemini surfactant and sodium hydroxide to the supergravity reactor, keep stirring for 10-20 minutes, sto...

Embodiment 2

[0041] The raw materials are weighed according to the composition of the following parts by weight:

[0042]

[0043] The preparation method comprises the following steps:

[0044] Step 1), according to the weighing direction of raw materials, first pour 1-allyl-3-ethylimidazolium bromide into the supergravity reactor, and then add acrylamide, acrylic acid to the supergravity reactor in turn Methyl ester and sodium vinyl sulfonate, stir and mix well;

[0045] Step 2), feed nitrogen from the bottom of the supergravity reactor, make nitrogen replace the oxygen in the oxygen in the supergravity reactor and the oxygen in the solution configured in the step 1), make the inside of the supergravity reactor The mass concentration of oxygen is lower than 100ppm;

[0046] Step 3), keep the nitrogen atmosphere of the supergravity reactor, continue to add Span-60, Gemini surfactant and sodium hydroxide to the supergravity reactor, keep stirring for 10-20 minutes, stop stirring, and s...

Embodiment 3

[0050] The raw materials are weighed according to the composition of the following parts by weight:

[0051]

[0052] The preparation method comprises the following steps:

[0053] Step 1), according to the weighing direction of raw materials, first pour 1-vinyl-3-ethylimidazolium hexafluorophosphate into the supergravity reactor, and then add acrylamide, Methyl acrylate and sodium vinyl sulfonate, stir and mix well;

[0054] Step 2), feed nitrogen from the bottom of the supergravity reactor, make nitrogen replace the oxygen in the oxygen in the supergravity reactor and the oxygen in the solution configured in the step 1), make the inside of the supergravity reactor The mass concentration of oxygen is lower than 100ppm;

[0055] Step 3), keep the nitrogen atmosphere of the supergravity reactor, continue to add Span-60, Gemini surfactant and sodium hydroxide to the supergravity reactor, keep stirring for 10-20 minutes, stop stirring, and seal Immediately close the nitroge...

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Abstract

The invention provides a high-efficiency and environment-friendly slippery water fracturing fluid drag reducer, comprising the following raw materials in parts by weight: 100 parts of ionic liquid; 1-3 parts of Gemini surfactant; 20-30 parts of acrylamide; 10-parts of methyl acrylate 20 parts; 1-5 parts of Span-60; 2-5 parts of sodium hydroxide; 2-4 parts of sodium vinyl sulfonate; wherein, the ionic liquid is an alkenyl functionalized ionic liquid, containing vinyl and allyl functional group. The breakthrough of the present invention is to use ionic liquids, Gemini surfactants, and combine the supergravity reaction to prepare the fracturing fluid drag reducer of the present invention. Through the supergravity reaction, the unexpected synergistic effect of the products between the raw materials makes the present invention The fracturing fluid drag reducer prepared by the inventive method has the effect of high efficiency and environmental protection, and at the same time, greatly saves the cost of the production process, and has very good economy and popularization.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploitation, in particular to an efficient and environment-friendly slippery water fracturing fluid drag reducer and a preparation method thereof. Background technique [0002] Shale gas is a kind of unconventional natural gas that hides in shale or mudstone layers in a free or adsorbed state. It has the characteristics of ultra-low permeability, long production cycle and long mining life. Between micro-nano Darcy, for the micro-nano Darcy level permeability of shale gas reservoirs, large-scale fracturing must be carried out in order to obtain industrial gas flow. The fracturing construction characteristics of shale gas reservoirs require the performance requirements of fracturing fluids: large fracturing scale, low cost of fracturing fluid, easy preparation, large construction displacement, high friction resistance, and good rheology of fracturing fluid Good performance, good drag reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C09K8/88
Inventor 何秀清王健
Owner 大庆玮德化工有限公司