Self-suspended proppant

A technology of proppant and curing agent, which is applied in the direction of production fluid, wellbore/well components, drilling composition, etc., and can solve the problems of low production efficiency of resin pellets, reducing the settling rate of proppant, and restricting the popularization of use. It achieves the effects of eliminating liquid preparation process and equipment, wide application temperature range and high sand carrying capacity

Pending Publication Date: 2019-01-18
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A self-suspending proppant, including aggregate and a film layer wrapped outside the aggregate, the film layer includes an inner film layer and an outer film layer, and the outer film layer is formed by an outer layer resin, an outer layer catalyst, and an outer layer curing agent , the inner film layer is generated by the first resin and the first curing agent. The specific mass parts of the above raw materials are as follows: 100 parts of aggregate, 1.8 parts of outer layer resin, 2 parts of first resin, 0.8 parts of first curing agent, 1.3 parts of outer layer curing agent, 0.005 parts of outer layer catalyst, amine compound 0.2 parts. Among them, the aggregate is 20 / 40 quartz sand, the outer layer resin is propanol polymer, the first resin is epoxy resin, the first curing agent is T31, the outer layer curing agent is isophorone diisocyanate, and the outer layer catalyst is selected Lead isooctanoate, and triethylamine is selected as the amine compound. In this exa...

Embodiment 2

[0045] A self-suspending proppant, comprising aggregate and a film layer wrapped outside the aggregate, the film layer includes an inner film layer and an outer film layer, and the outer film layer is composed of an outer layer resin, an outer layer catalyst, an outer layer curing agent and The amine compound is formed, and the inner film layer is formed by the first resin and the first curing agent. The specific parts by mass of the above raw materials are as follows: 100 parts of aggregate, 1 part of outer layer resin, 1 part of first resin, 0.6 part of first curing agent, 0.8 part of outer layer curing agent, 0.008 part of outer layer catalyst, amine compound 0.3 parts. Among them, the aggregate is 30 / 50 quartz sand, the outer layer resin is glycerol polymer, the first resin is epoxy resin, the first curing agent is 113D, and the outer layer curing agent is methylene diphenyl diisocyanate. The layer catalyst is selected from tributyltin, and the amine compound is selected ...

Embodiment 3

[0053] A self-suspending proppant, comprising aggregate and a film layer wrapped outside the aggregate, the film layer includes an inner film layer and an outer film layer, and the outer film layer is composed of an outer layer resin, an outer layer catalyst, an outer layer curing agent and The amine compound is formed, and the inner film layer is formed by the first resin and the first curing agent. The parts by mass of the above raw materials are as follows: 100 parts of aggregate, 1.2 parts of outer layer resin, 1.5 parts of first resin, 0.5 parts of first curing agent, 0.8 parts of outer layer curing agent, 0.01 part of outer layer catalyst, amine compound 0.3 parts. Among them, 40 / 70 quartz sand is used as the aggregate, ethylene glycol polymer is used as the outer layer resin, phenolic resin is used as the first resin, hexamethylenetetramine is used as the first curing agent, toluene diisocyanate is selected as the outer layer curing agent, and toluene diisocyanate is us...

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Abstract

The invention belongs to the technical field of petroleum, natural gas and shale gas and other fluid mineral exploration, and particularly relates to a self-suspended proppant. The proppant comprisesaggregates and a coating layer coating outside the aggregates, wherein the coating layer is generated from resin, a curing agent and a catalyst. The self-suspended proppant is soaked with an organic solvent and filtered, the filtered solution is tested, and the content of isocyanate in the solution is millesimal or more of solid content. The self-suspended proppant can meet the actual requirementsfor strength, drag-reducing efficiency, crushing materials, acid solubility and other indexes, can spontaneously suspend in water, and can be easily carried into a well without adding guar gum and other tackifying substances, so that cost can be greatly reduced, fracturing equipment and process can be simplified, and environmental pollution can be reduced.

Description

technical field [0001] The invention belongs to the technical field of fluid mineral exploitation such as oil, natural gas and shale gas, and in particular relates to a self-suspending 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 de...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 熊帆熊鹰王正力陈秋庆
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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