Microemulsion and nano-fracturing stimulation agent and preparation method thereof

A production stimulation agent and nano-technology, applied in the field of microemulsion nano-fracture stimulation agent and its preparation, can solve the problem of inability to clean and inhibit the organic blockage of pore throats, the improvement of fracturing fluid flowback rate is not obvious, and the reduction of fracturing fluid Surface activity and other problems, to achieve the effect of eliminating liquid lock damage, improving circulation effect, and reducing capillary force

Active Publication Date: 2019-10-15
BEIJING DADE GUANGYUAN PETROLEUM TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In previous reports, the production stimulation agent was prepared by adding surfactant compound fluid to the fracturing fluid. However, it reduces the surface activity and interfacial tension of the fracturing fluid to a small extent, and has little effect on the flowback rate of the fracturing fluid. The improvement is not obvious, and the organic blockage in the pore throat cannot be cleaned and suppressed

Method used

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  • Microemulsion and nano-fracturing stimulation agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] A microemulsion nano-fracture stimulation agent, which includes the following components in parts by weight:

[0046] 20 parts by weight of surfactant, 20 parts by weight of limonene, 1 part by weight of fatty acid, 1 part by weight of fatty amine, 1 part by weight of the first coated microsphere and 10 parts by weight of water;

[0047] Wherein, said surfactant comprises alkylamidopropyl betaine, fluorine-containing carbon chain Gemini surfactant and alkylamine polyoxyethylene ether, and the weight ratio of the three is 1:3:2;

[0048] The first coated microspheres are nanospheres coated with chitosan hydroxyapatite powder, and the preparation method is as follows: divide acetic acid into two parts at a weight ratio of 2:1, mix hydroxyapatite powder with one part acetic acid to obtain the first mixed solution, mix another part of acetic acid, chitosan and paraffin, heat to 50°C and keep stirring for 20 minutes to obtain the first embedding solution, add the first embed...

Embodiment 2

[0054] A microemulsion nano-fracture stimulation agent, which includes the following components in parts by weight:

[0055] The surfactant of 40 parts by weight, the limonene of 40 parts by weight, the fatty acid of 7 parts by weight, the fatty amine of 7 parts by weight, the first coating microsphere of 3 parts by weight and the water of 30 parts by weight;

[0056] Wherein, said surfactant comprises alkylamidopropyl betaine, fluorine-containing carbon chain Gemini surfactant and alkylamine polyoxyethylene ether, and the weight ratio of the three is 1:3:2;

[0057] The first coated microspheres are nanospheres coated with chitosan hydroxyapatite powder, and the preparation method is as follows: divide acetic acid into two parts at a weight ratio of 2:1, mix hydroxyapatite powder with one part Mix the acetic acid to get the first mixed solution, mix another part of acetic acid, chitosan and paraffin, heat to 60°C and keep stirring for 30min to get the first embedding solution...

Embodiment 3

[0063] A microemulsion nano-fracture stimulation agent, which includes the following components in parts by weight:

[0064] The surfactant of 30 parts by weight, the limonene of 30 parts by weight, the fatty acid of 4 parts by weight, the fatty amine of 4 parts by weight, the first coated microsphere of 2 parts by weight and the water of 20 parts by weight;

[0065] Wherein, said surfactant comprises alkylamidopropyl betaine, fluorine-containing carbon chain Gemini surfactant and alkylamine polyoxyethylene ether, and the weight ratio of the three is 1:3:2;

[0066] The first coated microspheres are nanospheres coated with chitosan hydroxyapatite powder, and the preparation method is as follows: divide acetic acid into two parts at a weight ratio of 2:1, mix hydroxyapatite powder with one part Mix the acetic acid to get the first mixed solution, mix another part of acetic acid, chitosan and paraffin, heat to 55°C and keep stirring for 25min to get the first embedding solution,...

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Abstract

The invention discloses a microemulsion nano fracturing yield increase agent and a preparation method thereof. The microemulsion nano fracturing yield increase agent is prepared from the following components in parts by weight: 20 to 40 parts of a surfactant, 20 to 40 parts of limonene, 1 to 7 parts of fatty acid, 1 to 7 parts of fatty amine, 1 to 3 parts of first coated microspheres and 10 to 30parts of water. The microemulsion nano fracturing yield increase agent is a nano-level tiny particle and can go deep into a small hole and reach all regions affected by fracturing liquid; when required to be subjected to gel breaking, the fracturing liquid is in contact with a gel breaking agent to exert the effect, so that the interfacial tension and the surface tension of the fracturing liquid gel breaking liquid are greatly reduced; the absorption amount of the fracturing liquid on a fracture shale solid interface is reduced, and the treatment area of the deep part of a fracture is relatively large; the capillary force of the fracturing liquid gel breaking liquid can be lowered; the wettability of the surface of a solid is improved; the liquid locking damage is relieved. Therefore, thefracturing liquid flowback rate is increased, and the yield of fluid ores is finally increased.

Description

technical field [0001] The invention relates to the technical field of oil and gas well stimulation. More specifically, the invention relates to a microemulsion nano-fracture stimulation agent and a preparation method thereof. Background technique [0002] Fracturing fluid is the liquid used in the fracturing measures of fluid ore (gas, steam, oil, fresh water, brine, hot water, etc.) After the proppant is injected into the cracks, the fracturing fluid needs to be discharged upwards and finally drained out to collect the fluid ore. The flowback of the fracturing fluid determines the collection rate of the fluid ore. Some data show that In shale gas fracturing, 60-90% of the injected fracturing fluid remains in the formation, and most of the water is sealed and retained around the fractured fractures and in the fractured fractures. These sealed and retained fluids will seriously reduce the relative permeability of the formation. Reduced fluid ore production. [0003] Micro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/68C09K2208/10Y02P20/54
Inventor 刘亚东孙晓东陈琰
Owner BEIJING DADE GUANGYUAN PETROLEUM TECH SERVICE
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