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Precoated sand used for sand prevention for intermediate and low temperate oil deposit and preparation method thereof

A technology of low-temperature oil and coated sand, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost and difficult storage, and achieve the effects of good temperature resistance, low cost of chemicals, and less dosage

Inactive Publication Date: 2012-09-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, the resin-coated sand used in my country's oilfields is not easy to store, and the cost is relatively high compared with mechanical sand control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of curing agent

[0035] Add ethylenediamine and methyl isopropyl ketone with a molar ratio of 1:2 into a four-necked reaction flask equipped with a water separator (equipped with a reflux condensing device), a thermometer and a stirring device. Fill up with methyl isopropyl ketone, stir and raise the temperature. When the temperature rises to 85°C, the reaction starts to reflux. After refluxing for a period of time, continue to heat up to 120°C to distill off excess methyl isopropyl ketone to obtain the product. The product is light yellow transparent liquid.

[0036] 2. Preparation of coated sand

[0037] Mix 45 parts of epoxy resin (E-51:E-20=1:3) and 20 parts of ethanol evenly to make a solution;

[0038] Then add 2 parts of the above-mentioned curing agent prepared into the above-mentioned solution, and mix well;

[0039] Add 2 parts of KH-550 to 1000 parts of quartz sand and stir evenly in the mixer, then add the solution prepared in the previo...

Embodiment 2

[0048] 1. Preparation of curing agent

[0049] The m-xylylenediamine and methyl isopropyl ketone that the mol ratio is 1:1.4 join water trap (reflux condensing device is equipped with), in the four-necked reaction flask of thermometer and stirrer, in water trap Just fill the medium with methyl isopropyl ketone, stir and heat up, raise the temperature to 90°C, the reaction starts to reflux, after a period of reflux, continue to heat up to 120°C to distill off excess methyl isopropyl ketone to obtain the product. The product is a yellow clear liquid.

[0050] 2. Preparation of coated sand

[0051] Mix 40 parts of epoxy resin E-20 and 15 parts of acetone evenly to form a solution;

[0052] Then add 4 parts of the above-mentioned curing agent prepared into the above-mentioned solution, and mix well;

[0053] Add 1.6 parts of KH-560 to 1000 parts of quartz sand and stir evenly in the mixer, then add the solution prepared in the previous step into the mixer and mix with the san...

Embodiment 3

[0062] 1. Preparation of curing agent

[0063] Add hexamethylenediamine and methyl isobutyl ketone with a molar ratio of 1:2 into a four-necked reaction flask equipped with a water separator (equipped with a reflux condensing device), a thermometer and a stirring device. Fill up with methyl isopropyl ketone, stir and raise the temperature. When the temperature rises to 85°C, the reaction starts to reflux. After refluxing for a period of time, continue to raise the temperature to 120°C to distill off excess methyl isopropyl ketone to obtain the product. The product is light yellow transparent liquid.

[0064] 2. Preparation of coated sand

[0065] Mix 50 parts of epoxy resin E-20 and 25 parts of mixed solvent (ethanol: acetone = 1:1 by mass ratio) to form a solution;

[0066] Then add 4 parts of the above-mentioned curing agent prepared into the above-mentioned solution, and mix well;

[0067] Add 2.2 parts of mixed coupling agent (KH-550:KH-560=1:1 by mass ratio) to 1000 pa...

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Abstract

The invention relates to precoated sand used for sand prevention for intermediate and low temperate oil deposit and a preparation method thereof. The preparation method comprises the following steps of: 1)evenly mixing 40-50 parts of epoxy resin and 12-25 parts of solvent to prepare solution; 2) adding 2-4 parts of ketamine curing agent into the solution to be evenly mixed; 3) evenly mixing 1.6-2.2 parts of coupling agent and 1000 parts of quartz sand; 4) adding the solution into the quartz sand to be evenly mixed; and 5) dispersing pre-packaged sand, rolling to scatter the sand to be packaged after the sand to be packaged is thoroughly dried, and bagging to be packaged in a sealing mode. The precoated sand prepared with the preparation method disclosed by the invention has the advantages of small use amount of required sand consolidation agent and low medicament cost, and the volatile polyamine curing agent with pungent smell is modified into latent curing agent which is free from peculiar smell and is easy to store. The precoated sand has a simple preparation technology, can be used without being prepared, can be stored for a long time in the dry place, has the advantages of good temperature resistance, ageing resistance and corrosion resistance, high solidified sand core strength and good permeability.

Description

technical field [0001] The invention relates to the field of chemical agents for oil fields, in particular to coated sand for sand control in medium and low temperature oil reservoirs and a preparation method thereof. Background technique [0002] At present, with the gradual deepening of the development of Gudao Oilfield, the deepening of the oilfield and the expansion of the oilfield, due to the gradual increase of the mining intensity, the sand production is becoming more and more serious. [0003] Sand control technology is one of the basic projects of oilfield development. Whether the oilfield can maintain long-term stable development, the development of sand control technology plays a vital role. [0004] Chemical sand control is a kind of sand control technology with "sand fixation" as the guiding ideology. It starts from the essence of the formation and fundamentally controls the sand production of the formation. It uses some chemicals to cement the sand in the form...

Claims

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Application Information

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IPC IPC(8): C09K8/56
Inventor 黄齐茂苏志雄潘志权李露露
Owner WUHAN INSTITUTE OF TECHNOLOGY
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