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Precured resin coated propping agent and preparation method thereof

A resin coating and pre-curing technology, applied in the chemical field, can solve the problems affecting the adhesion of the resin film and the anti-shattering ability of the proppant, and achieve excellent antistatic performance, excellent antistatic and water resistance performance, and improved antistatic performance Effect

Active Publication Date: 2009-11-18
阳泉市长青石油压裂支撑剂有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, resin materials use acetylene carbon black as an antistatic agent, and the dosage is more than 10% of the weight of the resin to avoid static electricity. Such a high carbon black content will affect the adhesion of the resin film to the aggregate and affect the final resistance of the proppant. Crushing capacity

Method used

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  • Precured resin coated propping agent and preparation method thereof
  • Precured resin coated propping agent and preparation method thereof
  • Precured resin coated propping agent and preparation method thereof

Examples

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preparation example Construction

[0022] Wherein, if in the pre-cured resin-coated proppant involved, the resin film only includes a resin film containing an antistatic agent, then the above-mentioned preparation method can only include the following steps: 1) heating the aggregate, stirring Add a coupling agent and a resin containing an antistatic agent (the order of adding the two is not limited), so that the resin is coated on the aggregate, and then add a curing agent to cure; 2) When the material is about to agglomerate, add a lubricant to continue Stir until the material is completely dispersed, and continue post-curing; 3) Shake and break the material, cool, and sieve. It is even possible not to add a coupling agent during the preparation.

[0023] Further, in the preparation method of the pre-cured resin-coated proppant of the present invention, in order to improve the bonding strength between the resin and the aggregate and prevent the shelling of the resin and the aggregate, it is preferable to use a...

Embodiment 1

[0028] Embodiment 1 (comparative example)

[0029] Heat 5kg of quartz sand (particle size 0.425 / 0.85mm) to 180°C and pour it into a mixer, add 0.5g of γ-aminopropyltriethoxysilane and stir for 30 seconds, add general-purpose phenolic resin 100 Stir for 60 seconds to make it evenly coated on the quartz sand, add 20 grams of hexamethylenetetramine and stir for 120 seconds, then add 150 grams of general-purpose phenolic resin and stir for 100 seconds, add 30 grams of hexamethylenetetramine Stir and solidify. When the material starts to agglomerate, add 15 grams of calcium stearate and continue to stir and solidify for 180 seconds. After cooling, crushing and sieving, the resin-coated quartz sand proppant can be obtained.

Embodiment 2

[0031] Weigh 200 grams of cashew oil modified phenolic resin, heat it to 140 ° C, add 2 grams of Span85, 4 grams of acetylene carbon black, 0.47 grams of cobalt isooctanoate and 0.66 grams of cobalt isooctanoate and stir evenly, sample preparation After measuring its volume resistivity 3×10 3 Ω·cm.

[0032] Heat 5kg of quartz sand (particle size 0.425 / 0.85mm) to 180°C and pour it into a mixer, add 0.5g of γ-aminopropyltriethoxysilane and stir for 30 seconds, add cashew oil modified phenolic Stir 100 grams of resin for 60 seconds to make it evenly coated on the quartz sand, add 20 grams of hexamethylenetetramine and stir for 120 seconds, then add 150 grams of the above-mentioned resin containing antistatic agent and stir for 100 seconds, add hexamethylenetetramine 30 grams of tetramine were stirred and solidified, and when the material began to agglomerate, 15 grams of calcium stearate was added to continue to stir and solidify for 180 seconds, cooled, crushed, and sieved to o...

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Abstract

The invention relates to a precured resin coated propping agent and a preparation method thereof. The precured resin coated propping agent comprises an aggregate and a resin membrane which coats resin outside the aggregate; the resin membrane includes a resin membrane comprising an antistatic agent and is characterized in that the antistatic agent comprises acetylene black and one or variety selected from the group formed by isocaprylic acid, octanoic acid or naphthenic acid of the metals like Fe, Co, Cu, V, Cr and Sn with a plurality of valence states. The precured resin coated propping agent has excellent antistatic conduction performance and the water resistance thereof is greatly improved; the percentage of damage of the propping agent after being dipped into water is greatly reduced; the consumption of the resin is less and the intensity of the coated propping agent is high.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a precured resin-coated proppant used in the field of oil and gas fields and a preparation method thereof. Background technique [0002] In the process of exploration and development of oil and gas fields, especially in the exploration and development of low-permeability and ultra-low-permeability oil and gas fields and the reconstruction of old oil and gas wells, fracturing has become the main means of increasing production and improving recovery. [0003] At present, the proppants used in foreign fracturing processes are mainly quartz sand, ceramsite and resin-coated proppants, while domestic fracturing processes are still dominated by quartz sand and ceramsite. Quartz sand is mainly used in the fracturing operation of shallow low closure pressure wells, and ceramsite is mainly used in the fracturing process of medium and deep wells. Although ceramsite solves the problem of low strengt...

Claims

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Application Information

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IPC IPC(8): C09K8/80C09K8/565
CPCC09K8/805
Inventor 李占刚马晓娟
Owner 阳泉市长青石油压裂支撑剂有限公司
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