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Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing nano composite polymer

A nano-composite, temperature-resistant and salt-resistant technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of unbearable hydrolysis and degradation, failure to achieve high temperature and long-term aging, and loss of effect of oilfield profile control and water shutoff operations and other problems, to achieve the effect of improving strength, strong hydrolysis resistance, strong stability and temperature resistance and salt resistance

Active Publication Date: 2020-08-07
北京九恒质信能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current cross-linked profile control systems based on ordinary polymers and vegetable gums cannot withstand hydrolysis and degradation at high temperatures, and cannot meet the requirements of high-temperature long-term aging
Moreover, the single cross-linking system causes the early dehydration phenomenon of the profile control agent system during the long-term aging process, which leads to the loss of the effect of profile control and water plugging operations in the oil field

Method used

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  • Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing nano composite polymer
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  • Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing nano composite polymer

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preparation example Construction

[0057] Further, the preparation method of the temperature-resistant and salt-resistant profile control agent includes the following steps:

[0058] According to mass percentage, 0.5-0.8% of nanocomposite polymer, 0.3-0.6% of cross-linking agent, 0.05-0.2% of heat stabilizer and the rest of water are uniformly mixed to obtain the product.

Embodiment 1

[0060] Preparation of nanocomposite polymer JNP-1:

[0061] In a 1L beaker, add 556.0g of deionized water, turn on the mechanical stirring to 1000rpm, and slowly drop 1.2g of titanium dioxide nano-sol into the water to form a dispersion. Then add 110.0g acrylic acid, 90.0g 2-acrylamide-2 methylpropanesulfonic acid, 23.6g N-vinylpyrrolidone, 11.3g N-isopropylacrylamide, add 14.3g urea, 1.2g dodecylbenzenesulfonic acid Sodium and 0.2g isopropanol, stir to dissolve fully. When the temperature is controlled at 20°C, the above mixed solution is then transferred to a 1L polymerization bottle, and nitrogen gas is introduced to remove oxygen for 30 minutes, and 5ml of a prepared potassium persulfate solution with a mass percentage of 1% is added, and 5 ml of a prepared mass percentage is 2% sodium bisulfite solution, 3.5ml prepared azobisisobutylamidine hydrochloride solution with a mass percentage of 2%, seal the polymerization bottle, wait for the reaction for 6 hours, take out the...

Embodiment 2

[0063] Preparation of nanocomposite polymer JNP-2:

[0064] In a 1L beaker, add 550.0g of deionized water, turn on the mechanical stirring to 1000rpm, and slowly drop 1.5g of alumina nano-sol into the water to form a dispersion. Then add 106.0g acrylamide, 90.0g 2-acrylamide-2 methylpropanesulfonic acid, 12.8g N-tert-butylacrylamide, 22.8g N-vinylpyrrolidone, add 15.5g urea, 2.4g sodium lauryl sulfate and 0.8g tert-butanol, stir to dissolve fully. When the temperature was controlled at 25°C, the above mixed solution was transferred to a 1L polymerization bottle, and nitrogen gas was introduced to remove oxygen for 30 minutes, and 6ml of the prepared sodium persulfate solution with a mass percentage of 1% was added, and 6 ml of the prepared mass percentage was 2% sodium sulfite solution, 4ml prepared azobisisobutyronitrile solution with a mass percentage of 2%, seal the polymerization bottle, wait for the reaction for 4 hours, take out the rubber block, granulate, dry, crush, ...

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Abstract

The invention discloses a nano-composite polymer and a temperature-resistant and salt-resistant profile control agent containing the nano-composite polymer, the nano-composite polymer is mainly formedby inorganic nano sol and a temperature-resistant and salt-resistant polymerization monomer through polymerization, and the components of the temperature-resistant and salt-resistant profile controlagent comprise the nano-composite polymer. According to the profile control agent disclosed by the invention, a functional polymer formed by polymerizing a temperature-resistant and salt-resistant polymerization monomer and inorganic nano sol is introduced; the profile control agent has high stability, temperature resistance and salt resistance, the anti-aging time reaches 100 days or above underthe conditions that the temperature is 150 DEG C or above and the salt concentration is 300,000 mg / L, and the strength of the profile control agent is improved through inorganic matter nano sol.

Description

technical field [0001] The application belongs to oil exploitation technology, in particular to a nanocomposite polymer and a temperature-resistant and salt-resistant profile control agent containing the nanocomposite polymer. Background technique [0002] With the long-term water injection development of the oilfield, the pore structure and physical parameters of the reservoir change, the heterogeneity of the oil layer intensifies, a large amount of injected water enters the high permeability layer, and the interlayer channeling is serious, which greatly reduces the water flooding efficiency, and the near-well adjustment After dissection, the follow-up injection fluid can still bypass the blockage area and return to the high permeability layer, so the effective period of production increase is short and the effect is poor. Therefore, a deep profile control technology using polymer hydrogel to improve the water flooding effect has been widely used, and the oil recovery effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/58C08F226/10C08F220/54C08F2/44C08F220/56C08F112/14C09K8/512
CPCC08F220/06C08F220/56C08F220/54C08F112/14C08F2/44C09K8/512C08F220/585C08F226/10
Inventor 徐文熙
Owner 北京九恒质信能源技术有限公司
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