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High-temperature-resistant sand-control support agent and high-temperature-resistant sand-control curing system

A technology of high temperature resistance and proppant, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance, low compressive strength and permeability of consolidated bodies, complex production process, etc., and achieve durable Good temperature performance, achieve normal temperature curing and high temperature resistance, and easy to use

Active Publication Date: 2013-06-26
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems of poor temperature resistance, complex production process, and low compressive strength and permeability of the consolidated body in the existing resin-coated proppant curing system

Method used

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  • High-temperature-resistant sand-control support agent and high-temperature-resistant sand-control curing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of sand control proppant

[0028] Heat 2kg of quartz sand with a particle size of 0.425-0.85mm to 600 o After C, pour it into the sand mixer and stir to reduce the temperature to 180 o C, then add 50g of temperature-resistant thermosetting phenolic resin and 1g of toughening agent into the sand mixer, stir for 30s, initially coat the quartz sand, and then add 10g of liquid epoxy with an epoxy value of 0.23-0.56eq / 100g The resin was stirred for 30s, then 5g of dispersant was added and stirred for 15s, and sieved to obtain the high temperature resistant sand control proppant of the present invention. , phosphorus-modified phenolic resin, molybdenum-modified phenolic resin or a combination of several.

[0029] 2. Preparation of Curing Solution

[0030] Add 3g of imidazole curing agent into the beaker, then add 10ml of ethanol, stir evenly, add 0.1g of accelerator 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30), continue stirring, and finally Dilute with w...

Embodiment 2

[0040] 1. Preparation of sand control proppant

[0041] Heat 50kg of ceramsite with a particle size of 0.3-1.18mm to 600 o After C, pour it into the sand mixer and stir to reduce the temperature to 180 oC, then add 70g of temperature-resistant thermosetting phenolic resin and 5g of toughening agent into the sand mixer, stir for 30s, initially coat the quartz sand, and then add 30g of liquid epoxy with an epoxy value of 0.23-0.56eq / 100g The resin was stirred for 30s, then 2.5g of dispersant was added and continued to stir for 15s, and sieved to obtain the high temperature resistant sand control proppant of the present invention. Resin, phosphorus modified phenolic resin mixed.

[0042] 2. Preparation of Curing Solution

[0043] Add a total of 5g of imidazole curing agent and polyamine curing agent into the beaker, then add 10ml of methanol, stir evenly and add 2g of accelerator phenol formaldehyde hexamethylenediamine condensate (701 # curing agent), continue to stir, and f...

Embodiment 3

[0053] 1. Preparation of sand control proppant

[0054] Heat 500g of a mixture of quartz sand and gravel with a particle size of 0.3-1.18mm to 600 o After C, pour it into the sand mixer and stir to reduce the temperature to 180 o C, then add 95g of temperature-resistant thermosetting phenolic resin and 0.1g of toughening agent into the sand mixer, stir for 30s, initially coat the quartz sand, and then add 5g of liquid ring with an epoxy value of 0.23-0.56eq / 100g The oxygen resin was stirred for 30 seconds, then 2.5 g of dispersant was added and continued to stir for 15 seconds, and sieved to obtain the high temperature resistant sand control proppant of the present invention. The temperature resistant thermosetting phenolic resin described in this example was a boron modified phenolic resin.

[0055] 2. Preparation of Curing Solution

[0056] Add 1g of polythiol curing agent to the beaker, then add 10ml of ethanol and methanol mixture, stir well, add 0.2g of accelerator phen...

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Abstract

The invention discloses a high-temperature-resistant sand-control support agent, which comprises aggregate and a resin film wrapped on the surface of the aggregate, wherein the resin film comprises a heat-resistant solid phenolic resin film and a mixed resin film formed by mixing heat-resistant solid phenolic resin with liquid epoxy resin. The invention further discloses a high-temperature-resistant sand-control curing system, which comprises the high-temperature-resistant sand-control support agent and a curing liquid matched with the high-temperature-resistant sand-control support agent. The high-temperature-resistant sand-control support agent is thermally coated by adopting the heat-resistant solid phenolic resin and the liquid epoxy resin; a film coated layer is initially cured, so that the high-temperature-resistant sand-control support agent has initial compressive strength; when the curing liquid is injected into a stratum, the liquid epoxy resin can be reacted with a curing agent at a low temperature to carry out particle adhesion; solidification intensity required before injecting steam is achieved; along with rising of the temperature, the high-temperature-resistant phenolic resin begins to be reacted to generate high-temperature adhesion; and the solidification intensity of the sand-control support agent is further increased, therefore, normal-temperature curing and high-temperature-resistant performance are realized.

Description

technical field [0001] The invention relates to a high temperature resistant sand control curing system, in particular to a high temperature resistant sand control proppant which can be cured at room temperature and a curing system using the sand control proppant. Background technique [0002] In oil extraction, sand production from oil and water wells is extremely harmful. If sand buries oil, gas, and water layers, the production of oil and gas wells will be stopped, and the injection of water wells will be stopped. Downhole operations, equipment maintenance or replacement will be frequent, and production costs will increase. If a large amount of sand is produced, the formation will be seriously deficient, and cavities will easily form outside the casing of the reservoir, causing formation collapse, casing rupture and deformation, and even the well being scrapped. Therefore, sand control for sand production wells is the primary measure to ensure the normal production of oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/56C04B26/12C04B26/14
Inventor 秦升益王光胡宝苓许智超
Owner BEIJING RECHSAND SCI & TECH GRP
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