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High mobility proppant and preparation method and application thereof

A technology for proppant and particulate matter, which is applied to proppant with high migration capacity and its preparation and application fields, can solve the problems of low proppant migration efficiency and reduced density migration efficiency, etc., so as to improve oilfield economic benefits and density. The effect of reducing and improving mobility

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the problem of low proppant migration efficiency in the prior art, and a proppant with high migration capacity is provided. The mixed particles of the mixture of salt and porous particles coat the polymer membrane shell, which has the advantages of reduced density and significantly improved migration efficiency under formation conditions

Method used

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  • High mobility proppant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Stir and mix 200g 20-40 mesh ceramsite proppant, 10g citric acid and sodium carbonate (2.2:1 molar ratio) powder and take it out, spray polyacrylate emulsion on the particle surface, and obtain proppant product after solvent volatilization.

[0038] After the obtained proppant was placed in water for 20 minutes, protrusions appeared on the surface of the particles, the volume increased, and a small amount of air bubbles adhered to the surface of the particles. After 3 hours, the air bubbles on the particles disappeared and the size returned to the initial state.

Embodiment 2

[0040] Stir and mix 200g of 10-20 mesh walnut shell particles, 15g of stearic acid and sodium bicarbonate powder (1.2:1 molar ratio), soak the particles in ABS dichloromethane solvent, filter and dry to obtain the proppant product .

[0041] After the prepared proppant was put into water for 35 minutes, protrusions appeared on the surface of the particles, and the volume increased, accompanied by air bubbles attached to the surface of the particles. After 4 hours, the air bubbles on the particles disappeared and the size returned to the initial state.

Embodiment 3

[0043] Mix 200g of 30-50 mesh ceramsite proppant, 10g of p-toluenesulfonic acid and calcium carbonate powder (2:1 molar ratio), dip in polyvinyl chloride solution, filter and dry to obtain the proppant product.

[0044] After the prepared proppant product was put into water for 25 minutes, protrusions appeared on the surface of the particles, and the volume increased, accompanied by air bubbles attached to the surface of the particles. After 3 hours, the air bubbles on the particles disappeared and the size returned to the original state.

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Abstract

The invention relates to a proppant with high migration capacity and its preparation method and application, which mainly solves the problem of low migration efficiency of the proppant in the prior art, by adopting a proppant, including a mixed particle core and a polymer film The casing; wherein, the technical solution that the mixed particles are a mixture of solid organic acid, carbonate or bicarbonate and particles with holes solves this problem well, and can be used in industrial production of oil field exploitation.

Description

technical field [0001] The invention relates to a proppant with high migration capacity and its preparation method and application. The particulate matter can be used as a proppant in the field of oil and gas exploitation. Background technique [0002] With the outbreak of the "shale gas revolution" in the United States, the development and utilization of unconventional oil and gas reservoirs has attracted the attention of experts and scholars at home and abroad. The permeability of unconventional oil and gas reservoirs is lower than that of conventional oil and gas reservoirs. Typical unconventional oil and gas reservoirs include tight gas sandstone layers, gas shale layers, coalbed methane layers and heavy oil. Coalbed methane and shale gas are two important unconventional natural gas resources that have been commercially developed. One of the biggest technical difficulties facing the development of the unconventional oil and gas reservoir industry is the hydraulic fractu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80E21B43/267
CPCC09K8/80E21B43/267
Inventor 沈少春李应成沙鸥张卫东苏智青
Owner CHINA PETROLEUM & CHEM CORP