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Clay stabilizer used for slick water fracturing fluid and preparation method thereof

A clay stabilizer, a technology for hydraulic fracturing, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as pollution, increase environmental risks, etc., achieve inhibition of swelling, reduce reservoir damage, and outstanding clay stabilization function Effect

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-valent metal cations such as zirconium and titanium ions can be ionized and hydrated in water to form hydrated complex ions, which are linked by hydroxyl bridges to form multi-nuclear complexes (inorganic polymers). Although they have a strong clay stabilization function, a large amount of heavy metals Use will cause groundwater pollution and increase potential environmental risks

Method used

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  • Clay stabilizer used for slick water fracturing fluid and preparation method thereof
  • Clay stabilizer used for slick water fracturing fluid and preparation method thereof
  • Clay stabilizer used for slick water fracturing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 1,1,7,7-tetramethyldiethylenetriamine, 1-chloro-2,3-propylene oxide and 2-chloroethyltrimethylammonium chloride in a molar ratio of 1:1:2 In the solvent ethanol, the mass ratio of the reactant to the solvent is 1:3 to obtain a mixture; nitrogen is passed into the above mixture to remove the oxygen in the system; then the temperature is raised to 70°C; potassium persulfate / sodium sulfite is added as an initiator to initiate The mass ratio of the consumption of agent and reactant is 0.005:1; Continue to react for 5 hours, add hydroquinone as polymerization inhibitor to terminate reaction, the mass ratio of the addition of polymerization inhibitor and reactant is 0.005:1, obtain clay stabilizer.

Embodiment 2

[0026] Add 1,1,7,7-tetramethyldiethylenetriamine, 1-chloro-2,3-propylene oxide and 2-chloroethyltrimethylammonium chloride in a molar ratio of 1:2:1 In the solvent isopropanol, the mass ratio of the reactant to the solvent is 1:3 to obtain a mixture; nitrogen is introduced into the above mixture to remove the oxygen in the system; then the temperature is raised to 70°C; potassium persulfate / sodium sulfite is added as an initiator , the mass ratio of the consumption of initiator and reactant is 0.005:1; Continue to react for 5 hours, add hydroquinone as polymerization inhibitor to terminate reaction, the addition of polymerization inhibitor and the mass ratio of reactant are 0.005:1, Get a clay stabilizer.

Embodiment 3

[0028] Add 1,1,7,7-tetramethyldiethylenetriamine, 1-chloro-2,3-propylene oxide and 2-chloroethyltrimethylammonium chloride at a molar ratio of 1:3:0.5 In the solvent butanol, the mass ratio of the reactant to the solvent is 1:1 to obtain a mixture; nitrogen is passed into the above mixture to remove the oxygen in the system; then the temperature is raised to 90°C; hydrogen peroxide / ascorbic acid is added as an initiator, The mass ratio of the amount of the initiator to the reactant is 0.0010:1; the reaction is continued for 10 hours, and p-tert-butylcatechol is added as a polymerization inhibitor to terminate the reaction, and the mass ratio of the amount of the inhibitor to the reactant is 0.002:1 , to obtain a clay stabilizer.

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Abstract

The invention provides a clay stabilizer used for a slick water fracturing fluid. The clay stabilizer is a quaternary ammonium salt compound. The invention also provides a preparation method of the clay stabilizer. The method comprises the following steps: adding reactants 1,1,7,7-tetramethyl diethylenetriamine, 1-chloro-2,3-epoxypropane and 2-chloroethyltrimethyl ammonium chloride into a solvent to obtain a mixture; heating the mixture to 50-90 DEG C, adding an initiator and reacting for 2-10 h; and finally adding a polymerization inhibitor to stop the reaction. The clay stabilizer has proper molecular dimension. When the clay stabilizer is used in a slick-water fracturing fluid system in shale gas exploitation, clay stabilization function is prominent, and shale reservoir damage is greatly reduced. The product has a good promotion prospect.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, and relates to a clay stabilizer used for slick water fracturing fluid and a preparation method thereof. The clay stabilizer is particularly suitable for use in shale gas fracturing construction. Background technique [0002] With the depletion of conventional oil and gas resources, the development of unconventional oil and gas resources has attracted more and more attention worldwide. Facing the huge global energy demand, people urgently need to find suitable replacement resources. Among them, according to the forecast and statistics of the World Oil and Gas Magazine in 2009, the world's shale gas reserves are about 4.6×10 14 m 3 , the amount of resources is very rich. Shale gas reservoirs have ultra-low permeability, large thickness, and well-developed natural fractures, requiring hydraulic fracturing to achieve industrial exploitation value. At present, slick ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C08G73/02
CPCC08G73/02C09K8/607C09K8/68C09K8/885C09K2208/12
Inventor 郑承纲苏建政赵崇镇马玉生赵梦云王连生李颖史爱萍张大年
Owner CHINA PETROLEUM & CHEM CORP
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