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A kind of supramolecular fracturing fluid with self-healing performance and preparation method thereof

A supramolecular and fracturing fluid technology, applied in the field of oilfield chemicals and fine chemistry, can solve the problems of poor self-healing performance of supramolecular fracturing fluid, achieve good self-healing performance, good temperature resistance and shear resistance, excellent The effect of sand-carrying performance

Active Publication Date: 2021-10-22
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present application aims at the problem of poor self-healing performance of existing supramolecular fracturing fluids, and provides a supramolecular fracturing fluid with self-healing properties and a preparation method thereof

Method used

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  • A kind of supramolecular fracturing fluid with self-healing performance and preparation method thereof
  • A kind of supramolecular fracturing fluid with self-healing performance and preparation method thereof
  • A kind of supramolecular fracturing fluid with self-healing performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A super-molecular fracturing fluid having self-repairing performance and a preparation method thereof, made of a mass percentage of material:

[0048] Acrylamide: 3%;

[0049] Carboxymethylhydroxypropylguanol: 0.5%;

[0050] Other components are calculated according to the mass percentage of acrylamide:

[0051] N, N'-methylene bis acrylamide: 0.06%;

[0052] Ammonium sulfate: 5%;

[0053] The remaining amount is deionized water.

[0054] Preparation method: Deton water is added to the reactor and the carboxymethylhydrin gum, stirred for 20 min; add acrylamide under stirring conditions, stir for 10 min, add N, N'-methylene double acrylamide, stirred for 10 min After the addition of ammonium ammonium sulfate, stirring was continued for 20 min to achieve a uniform state; after the stirring was completed, the reaction kettle temperature was increased to 40 ° C, and the supersolic fracturing fluid was obtained.

[0055] The HAAKE MARS III rheometer is used to vane testing of th...

Embodiment 2

[0057] A super-molecular fracturing fluid having self-repairing performance and a preparation method thereof, made of a mass percentage of material:

[0058] Acrylamide: 2.5%;

[0059] Carboxymethylhydroxypropylguanol: 0.5%;

[0060] Other components are calculated according to the mass percentage of acrylamide:

[0061] N, N'-methylene bis acrylamide: 0.07%;

[0062] Ammonium sulfate: 4%;

[0063] The remaining amount is deionized water.

[0064] Preparation method as in Example 1.

[0065] The simulated fracturing fluid is cut down during the injection, and the energy storage modulus and energy consumption modulus before and after the shear damage before the SHAKE MARS III rheology are tested. Change relationship, the result is like figure 2 with image 3 Indicated. After the shear is destroyed, the energy storage modulus and energy consumption modulus of the polyacrylamide have decreased significantly prior to destruction, and the yield stress is lowered from 10 Pa to 2 Pa; and t...

Embodiment 3

[0067] A super-molecular fracturing fluid having self-repairing performance and a preparation method thereof, made of a mass percentage of material:

[0068] Acrylamide: 2.5%;

[0069] Carboxymethylhydroxypropyluanidyl gum: 0.45%;

[0070] Other components are calculated according to the mass percentage of acrylamide:

[0071] N, N'-methylene bis acrylamide: 0.07%;

[0072] Ammonium sulfate: 4%;

[0073] The remaining amount is deionized water.

[0074] Preparation method as in Example 1.

[0075] The simulated fracturing fluid is cut down during the implantation, and the proppantry static settling rate before and after the hyperpatocollex liquid and the like of polyacrylamide, characterizing the granulation performance of the pressure cleft fluid, Figure 4 Indicated. Before shearing damage, the static settling rate of the proppant in the superpolar fracturing fluid was 1.8 cm / h, which was smaller than its settling rate (4 cm / h) in the polyacrylamide. After shearing is destroy...

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Abstract

This application discloses a supramolecular fracturing fluid with self-healing performance, which is composed of the following components by mass percentage: 2% to 5% of non-ionic monomers, 0.1% to 0.6% of functional monomers, and other components Calculated according to the mass percentage of the non-ionic monomer: 0.05% to 0.08% of the crosslinking agent, 1% to 5% of the initiator; the balance is deionized water. The preparation method is that each component is sequentially added into a reaction kettle to carry out multi-component copolymerization of an aqueous solution to obtain supramolecular fracturing fluid. The supramolecular fracturing fluid of this application has good self-repair performance: after being sheared and damaged, the viscosity repair rate of the supramolecular fracturing fluid reaches more than 81%, the viscoelastic property repair rate reaches more than 95%, and maintains good sand carrying performance to meet the needs of hydraulic fracturing operations.

Description

Technical field [0001] The present application relates to the field of oilfield chemicals and fine chemical technology, and in particular, there is a super-molecular fracturing liquid having self-repairing properties and a preparation method thereof. Background technique [0002] With a rapid progress of exploration discovery and mining technology, hydraulic fracturing gradually became an important technique that led the world's very oil and gas, the performance of fracturing fluid will directly affect the effect of hydraulic fracturing operation. [0003] During the hydraulic fracturing process, the pumping device is inserted by the liquid storage tank from the reservoir, the bobbin, and the fracturing fluid plasted into the artificial crack in the artificial crack, the fracturing fluid injects the artificial crack. Cracks, carrier support, viscosity, viscoelastic, and sand performance of grain, are important performance indicators of fracturing fluid. At the wellbore and the ey...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/38C09K8/68C09K8/90
CPCC08F220/56C09K8/685C09K8/905C08F222/385
Inventor 马应娴熊雨佳郭建春赖杰任冀川朱智马乐瑶
Owner SOUTHWEST PETROLEUM UNIV