Hydraulic fracturing propping agent

A technology for water fracturing and proppant, which is applied in the fields of production fluid, drilling composition, earthwork drilling, etc., can solve the problems of low production efficiency of resin pellets, reducing the settling rate of proppant, and restricting the popularization and use, etc. The effect of eliminating the dispensing process and equipment, wide application temperature range and high sand carrying capacity

Inactive Publication Date: 2019-03-01
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of product can indeed achieve semi-suspension in water and reduce the settling rate of proppant in water, but because the apparent density must be greatly reduced, its production cost will be greatly increased, and the performance of proppant, such as crushing, acid solubility, and diversion and other performance will be significantly reduced
However, the low production efficiency and high cost of resin pellets also limit its popularization and use.

Method used

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  • Hydraulic fracturing propping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A clear water fracturing proppant, comprising aggregates and a coating layer wrapped outside the aggregates, the coating layer is prepared from a resin, a curing agent and a catalyst; the specific mass parts of the above raw materials used are as follows: 100 parts of aggregate, 2 parts of resin, 1.1 parts of curing agent, 0.01 part of catalyst. The aggregate is 20 / 40 quartz sand, the resin is glycerol polymer, the curing agent is toluene diisocyanate, and the catalyst is dibutyltin dilaurate. In this embodiment, the energy spectrum test characteristic of the coating layer is that the atomic ratio of carbon to oxygen is 5:1.

[0034] The clear water fracturing proppant is prepared by the following method: after heating the aggregate to 90°C, add resin and catalyst, and mix and stir; when the temperature drops to 80°C, add curing agent, mix and stir; when the temperature drops to 50°C, leave Pot, get clean water fracturing proppant.

Embodiment 2

[0036] A clear water fracturing proppant, comprising aggregates and a coating layer wrapped outside the aggregates, the coating layer is prepared from a resin, a curing agent and a catalyst; the specific mass parts of the above raw materials used are as follows: 100 parts of aggregate, 2.5 parts of resin, 1.63 parts of curing agent, and 0.015 parts of catalyst. The aggregate is 30 / 50 quartz sand, the resin is propylene glycol polymer, the curing agent isophorone diisocyanate, and the catalyst is tributyltin. In this embodiment, the energy spectrum test characteristic of the coating layer is that the atomic ratio of carbon to oxygen is 6:1.

[0037] The clear water fracturing proppant is prepared by the following method: after heating the aggregate to 100°C, add resin and catalyst, and mix and stir; when the temperature drops to 90°C, add curing agent, mix and stir; Pot, get clean water fracturing proppant.

Embodiment 3

[0039] A clear water fracturing proppant, comprising aggregates and a coating layer wrapped outside the aggregates, the coating layer is prepared from a resin, a curing agent and a catalyst; the specific mass parts of the above raw materials used are as follows: 100 parts of aggregate, 3 parts of resin, 2.3 parts of curing agent, 0.02 parts of catalyst. Among them, 40 / 70 quartz sand is used as the aggregate, propanol polymer is used as the resin, diphenylmethane diisocyanate is used as the curing agent, and lead isooctoate is used as the catalyst. In this embodiment, the energy spectrum test characteristic of the coating layer is that the atomic ratio of carbon to oxygen is 7:1.

[0040] The clear water fracturing proppant is prepared by the following method: after heating the aggregate to 110°C, add resin and catalyst, mix and stir; when the temperature drops to 100°C, add curing agent, mix and stir; when the temperature drops to 70°C, take out Pot, get clean water fracturin...

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Abstract

The invention belongs to the field of compositions used for reinforcing fracturing action, and particularly discloses a hydraulic fracturing propping agent. The hydraulic fracturing propping agent comprises aggregates and a film coating layer, wherein the aggregates are wrapped with the film coating layer, and the film coating layer is made of resin, a curing agent and a catalyst; and an energy spectrum testing characteristic of the film coating layer is that the ratio of carbon to oxygen atom is (1.5 to 7.5) to 1. The hydraulic fracturing propping agent meets requirements in indexes such as strength, damping efficiency, broken material and acid solubility, can perform self-suspension in water, is easy to carry, and has no pollution to the environment.

Description

technical field [0001] The invention belongs to the field of compositions for strengthening fracturing, in particular to a clear water fracturing proppant. Background technique [0002] Proppant refers to the liquid additive that is brought into the fracture by fracturing fluid and used to support the fracture in the oil field after the pressure is released. Collapse and seepage of well drilling in Cave oil field. [0003] The ideal fracturing proppant for oil and gas wells requires high carrying capacity and high sand ratio, so it needs to have the lowest possible density and the highest possible strength. Traditional fracturing proppants include quartz sand, ceramsite and their coated products. The outer coating is cured at high temperature with phenolic or epoxy resin. The amount of curing agent is generally 5-50% of the resin. The membrane temperature is around 230 degrees. The traditional fracturing proppant is strong, but the density is also high, and its suspension ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C08G18/66C08G18/48C08G18/32
CPCC08G18/3228C08G18/4825C08G18/4829C08G18/6685C09K8/805
Inventor 熊帆熊鹰王正力陈秋庆
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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