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Film-coated proppant and preparation method thereof

A proppant and film coating technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problems of low gas production rate and high water content, so as to prevent the decline of conductivity and reduce water content. rate, the effect of improving the compressive strength

Active Publication Date: 2021-07-27
北京昆仑隆源石油开采技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most domestic oil fields are low-permeability reservoirs, and there are difficulties in increasing production such as high water content and low gas output rate.

Method used

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  • Film-coated proppant and preparation method thereof
  • Film-coated proppant and preparation method thereof

Examples

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Effect test

preparation example Construction

[0037] One aspect of the present invention provides a method for preparing a film-coated proppant, the method comprising:

[0038] A certain amount of aggregate is weighed, and the aggregate is heated to a first preset temperature, and then the heating is stopped.

[0039] Exemplarily, it is possible to choose to weigh a certain amount of quartz sand or ceramsite as aggregate, and stop heating after heating the aggregate to a first preset temperature. In order to make the subsequent feeding and stirring process more smooth, after the aggregate is heated to the first preset temperature, it can be optionally put into the sand mixer to complete the subsequent steps.

[0040] When the temperature of the aggregate drops to the second preset temperature, add a certain amount of the first resin, and control the feeding time to the first preset time, then add a certain amount of silicon micropowder and stir.

[0041] The first resin in this step can improve the strength of the film-c...

Embodiment 1

[0071] Weigh 2000 grams of quartz sand, heat the quartz sand to 200°C and stop heating, put the heated quartz sand into the sand mixer, and when the temperature of the quartz sand drops to 180°C, add 10 grams of epoxy 0.07mol / 100g bisphenol A epoxy resin, the feeding time is controlled at 15 seconds, then add 50 grams of silicon micropowder with a particle diameter of 45 μm, stir for 20 seconds, then add 1.0 gram of modified amine curing agent, the feeding Time is controlled at 10 seconds, then add 10 grams of bisphenol A epoxy resins with an epoxy value of 0.07mol / 100g, this addition time is controlled at 15 seconds, then add 100 grams of polytetrafluoroethylene emulsion with a solid content of 40% , the feeding time is controlled at 20 seconds, after the feeding is completed, stir for 10 seconds, then add 1.0 g of modified amine curing agent, the feeding time is controlled at 15 seconds, then cool and sieve to obtain the film-coated proppant.

[0072] After testing, the cont...

Embodiment 2

[0074] The difference from Example 1 is that the bisphenol A epoxy resin added twice in this embodiment is 20 grams, the modified amine curing agent added twice is 5 grams, and the silicon micropowder added is 100 grams. The polytetrafluoroethylene emulsion that adds is 200 grams.

[0075] After testing, the contact angle of the film-coated proppant prepared by this method is 168°, the breakage rate is 2.7%, the roundness and sphericity can be increased to 0.9, and the acid solubility can be reduced to 2.75%.

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Abstract

The invention provides a film-coated proppant and a preparation method thereof. The method comprises the following steps: weighing a certain amount of aggregate, heating the aggregate to a first preset temperature, and then stopping heating; when the temperature of the aggregate decreases to a second preset temperature, adding a certain amount of first resin, wherein the feeding time controlled to be a first preset time, then adding a certain amount of silica powder, and carrying out stirring; and adding a certain amount of second resin, wherein the feeding time of the second resin controlled to be a second preset time, then adding a certain amount of a fluorine-containing polymer emulsion, wherein the feeding time of the fluorine-containing polymer emulsion controlled to be a third preset time, and successively conducting stirring, cooling and screening to obtain the film-coated proppant. According to the invention, oil and water can be effectively and selectively permeated, the gas phase yield of oil is improved, and a water content is reduced; meanwhile, the compressive strength and sphericity of the proppant can be greatly improved, and acid solubility is reduced; and a micro / nano structure on the surface of the proppant can realize self-cleaning, so the proppant can be effectively prevented from scaling on the surface of a crack, and the final reduction of flow conductivity caused by surface scaling is prevented.

Description

technical field [0001] The invention belongs to the technical field of petroleum fracturing proppant, and in particular relates to a film-coated proppant and a preparation method thereof. Background technique [0002] With the development of society, energy consumption is gradually increasing, further increasing the production of oil and natural gas is of great significance to maintaining the security of energy in our country. The improvement of oil and gas production capacity depends on the development of science and technology. In the exploration and development of oil and gas fields, it is more important to strengthen the research and industrial application of new technologies, prolong the stable production period of oil and gas fields, and improve the ultimate oil recovery and resource utilization. Significance. [0003] Hydraulic fracturing technology plays an irreplaceable role in the stable production of old oilfields and the development of new low-permeability oilfi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 任龙强王光王建兵马欢
Owner 北京昆仑隆源石油开采技术有限公司
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