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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 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 pharmaceutical cost and high strength

Inactive Publication Date: 2014-11-05
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 trap (equipped with reflux condenser), a thermometer and a stirring device, just in the water trap Fill up the methyl isopropyl ketone, stir and raise the temperature. When the temperature is raised to 85° C., the reaction begins to reflux. After refluxing for a period of time, continue to heat up to 120° C. to steam the excess methyl isopropyl ketone to obtain the product. The product is a 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 to form a solution;

[0038] Then add 2 parts of the above-mentioned curing agent to the above-mentioned solution and mix evenly;

[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 previous step to t...

Embodiment 2

[0048] 1. Preparation of curing agent

[0049] Add metaxylylenediamine and methyl isopropyl ketone with a molar ratio of 1:1.4 into a four-necked reaction flask equipped with a water trap (equipped with reflux condenser), a thermometer and a stirring device, in the water trap Just fill the medium with methyl isopropyl ketone, stir and raise the temperature, raise the temperature to 90° C., and the reaction starts to reflux. After refluxing for a period of time, continue to heat up to 120° C. to steam the 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 to the above-mentioned solution and mix evenly;

[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 to the mi...

Embodiment 3

[0062] 1. Preparation of curing agent

[0063] Add hexamethylene diamine and methyl isobutyl ketone with a molar ratio of 1:2 into a four-necked reaction flask equipped with a water trap (equipped with reflux condenser), a thermometer and a stirring device, and it is just right in the water trap. Fill up the methyl isopropyl ketone, stir and raise the temperature. When the temperature is raised to 85° C., the reaction begins to reflux. After refluxing for a period of time, continue to heat up to 120° C. to steam the excess methyl isopropyl ketone to obtain the product. The product is a 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 to the above-mentioned solution and mix evenly;

[0067] Add 2.2 parts of mixed coupling agent (KH-550: KH-560=1:1 according to the mass ratio...

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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 oilfield chemical agents, in particular to a 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 the Gudao Oilfield, the deepening of the potential and the expansion of the oilfield, due to the gradual increase in mining intensity, sand production is becoming more and more serious. [0003] Sand control technology is one of the basic projects of oil field development. Whether the oil field can maintain long-term and stable development, the development of sand control technology plays a vital role. [0004] Chemical sand control is a sand control technology with "sand consolidation" as the guiding ideology. It starts from the nature of the formation and fundamentally controls the sand production of the formation. It uses some chemicals to cement the sand in the formation to preve...

Claims

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Application Information

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