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Waterproof locking agent and preparation method thereof

A technology of waterproof locking agent and distilled water, applied in the field of drilling fluid additives, can solve the problems of low oil and gas permeability, can not effectively reduce the surface tension of filtrate and oil-water interfacial tension, etc., to reduce oil-water interfacial tension, improve structural performance, increase The effect of adhesion

Inactive Publication Date: 2017-11-14
常州市瑞泰物资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problem that the current traditional waterproof locking agent cannot effectively reduce the tension of the filtrate surface and the interfacial tension of oil and water, resulting in low oil and gas phase permeability, a waterproof locking agent and its preparation method are provided

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0021] The preparation of waterproof locking agent of the present invention comprises the steps:

[0022] (1) Proportioning according to parts by weight, taking raw materials;

[0023] (2) Put acrylamide, distilled water, glyceryl monostearate and cetyltriethylammonium bromide into a blender, stir at 900r / min for 20-30min, collect the stirred mixture, and obtain an emulsion;

[0024] (3) Put the emulsion, cyclohexane, liquid polybutadiene, ammonium metavanadate and neodymium oxide into the reactor, use nitrogen protection, and increase the pressure to 0.2-0.4MPa, at 50-60 °C to Stir at 200r / min and preheat for 10-15min, then add ammonium persulfate and stir for 30-35min;

[0025] (4) After the stirring is completed, raise the temperature to 90-105°C, stir for 8-12 hours, cool down to 70-75°C, then add γ-aminopropyltriethoxysilane, stir evenly, and let stand for 6-9 hours. Cool to room temperature and collect the reaction mixture;

[0026] (5) Put the reaction mixture into a...

example 1

[0028] The waterproof locking agent of the present invention comprises the following raw materials in parts by weight, 45 parts of cyclohexane, 25 parts of liquid polybutadiene, 28 parts of acrylamide, 20 parts of glyceryl monostearate, 14 parts of distilled water, 15 parts of β - Sitosterol, 6 parts cetyltriethylammonium bromide, 5 parts gamma-aminopropyltriethoxysilane, 3 parts ammonium persulfate, 0.6 part ammonium metavanadate, 0.8 part neodymium oxide.

[0029] The average molecular weight of the liquid polybutadiene in the raw material was 10,000. (produced by Suzhou Hengshunda Chemical Technology Co., Ltd., model LPB-1)

[0030] The preparation of waterproof locking agent of the present invention comprises the steps:

[0031] (1) Proportioning according to parts by weight, taking raw materials;

[0032] (2) Put acrylamide, distilled water, glyceryl monostearate and cetyltriethylammonium bromide into a blender, stir at 900r / min for 30min, collect the stirred mixture, a...

example 2

[0037] The waterproof locking agent of the present invention comprises the following raw materials in parts by weight, 40 parts of cyclohexane, 21 parts of liquid polybutadiene, 20 parts of acrylamide, 15 parts of glyceryl monostearate, 12 parts of distilled water, 10 parts of β - Sitosterol, 4 parts cetyltriethylammonium bromide, 3 parts gamma-aminopropyltriethoxysilane, 2 parts ammonium persulfate, 0.4 part ammonium metavanadate, 0.1 part neodymium oxide.

[0038] The average molecular weight of the liquid polybutadiene in the raw material was 4,000. (produced by Shanghai Donghu Industrial Co., Ltd., the model is Polyvest110)

[0039] The preparation of waterproof locking agent of the present invention comprises the steps:

[0040] (1) Proportioning according to parts by weight, taking raw materials;

[0041] (2) Put acrylamide, distilled water, glyceryl monostearate and cetyltriethylammonium bromide into a blender, stir at 900r / min for 30min, collect the stirred mixture, ...

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Abstract

The invention relates to a waterproof locking agent and a preparation method thereof and belongs to the technical field of a drilling fluid additive. The method comprises the following steps: putting acrylamide, distilled water, glycerin monostearate and cetyl triethyl ammonium bromide into a stirrer for stirring, collecting and mixing a mixture, thereby acquiring an emulsion; putting the emulsion, cyclohexane, liquid polybutadiene, ammonium metavanadate and neodymium oxide into a reactor, using nitrogen for protecting, preheating, adding ammonium persulfate and stirring; after ending stirring, raising temperature, stirring and reacting, cooling and then adding gamma-aminopropyl triethoxy silane, uniformly stirring, standing, cooling to room temperature and collecting a reaction mixture; performing reduced pressure distillation on the reaction mixture, removing distilled water and cyclohexane, collecting distilled residue, filtering, collecting filtrate, and uniformly stirring the filtrate and beta-sitosterol, thereby acquiring the waterproof locking agent. The waterproof locking agent prepared according to the invention can effectively reduce the tension on the filtrate surface and the tension on the oil-water interface and can increase the permeability of oil and gas phases.

Description

technical field [0001] The invention relates to a waterproof locking agent and a preparation method thereof, belonging to the technical field of drilling fluid additives. Background technique [0002] Low-porosity and low-permeability oil and gas reservoirs generally have the characteristics of high muddy cement content, high water saturation, high capillary pressure, strong water sensitivity, small pore throat, poor permeability, complex structure, and large oil and gas flow resistance. A large number of studies have shown that water lock damage is the most important and serious damage type of this type of reservoir, and the damage rate is generally 70% to 90%. Drilling fluid is the first foreign fluid in contact with the reservoir, and its filtrate intrusion into the reservoir will cause water lock damage, increase the water saturation of the reservoir, and reduce the permeability of oil and gas phases. The waterproof lock agent is used in the drilling fluid system It is ...

Claims

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Application Information

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IPC IPC(8): C09K8/03
CPCC09K8/03
Inventor 陈刚薛焱璟王磊
Owner 常州市瑞泰物资有限公司
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