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Nanocomposite polymer and temperature-resistant and salt-resistant profile control agent containing the same

A nano-composite, temperature-resistant and salt-resistant technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of inability to achieve high temperature long-term aging, inability to endure hydrolysis and degradation, and loss 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: 2022-07-05
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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  • Nanocomposite polymer and temperature-resistant and salt-resistant profile control agent containing the same
  • Nanocomposite polymer and temperature-resistant and salt-resistant profile control agent containing the same
  • Nanocomposite polymer and temperature-resistant and salt-resistant profile control agent containing the same

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preparation example Construction

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

[0058] Calculated by mass percentage, 0.5-0.8% of the nanocomposite polymer, 0.3-0.6% of the crosslinking agent, 0.05-0.2% of the heat stabilizer and the balance of water are uniformly mixed to obtain the obtained 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 nanosol into the water to form a dispersion. Then add 110.0g acrylic acid, 90.0g 2-acrylamide-2methylpropanesulfonic 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-mentioned mixed solution is then transferred into a 1L polymerization bottle, nitrogen is introduced for deoxygenation for 30min, 5ml of potassium persulfate solution with a prepared mass percentage of 1% is added, and 5ml of a prepared mass percentage of 1% is added. 2% sodium bisulfite solution, 3.5ml of 2% azodiisobutylamidine hydrochloride solution prepared by mass, seal the polymerization bottle, wait for the reaction for 6h, take out the glue block, gran...

Embodiment 2

[0063] Preparation of nanocomposite polymer JNP-2:

[0064] In a 1L beaker, add 550.0 g of deionized water, turn on the mechanical stirring to 1000 rpm, and slowly drop 1.5 g of alumina nanosol into the water to form a dispersion. Then add 106.0g acrylamide, 90.0g 2-acrylamide-2methylpropanesulfonic acid, 12.8g N-tert-butylacrylamide, 22.8g N-vinylpyrrolidone, add 15.5g urea, 2.4g sodium dodecyl sulfate And 0.8g tert-butanol, stir and dissolve fully. When the temperature is controlled at 25°C, the above mixture is then transferred to a 1L polymerization bottle, nitrogen is introduced for deoxygenation for 30min, 6ml of sodium persulfate solution with a mass percentage of 1% is added, and 6ml of a prepared mass percentage of 1% is added. 2% sodium sulfite solution and 4ml of prepared 2% azobisisobutyronitrile solution by mass, seal the polymerization bottle, wait for 4 hours to react, take out the glue block, granulate, dry, pulverize and sieve to obtain nanocomposite polymeri...

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Abstract

The present application discloses a nano-composite polymer and a temperature-resistant and salt-resistant profile control agent containing the nano-composite polymer, wherein the nano-composite polymer is mainly composed of an inorganic nanosol and a temperature-resistant and salt-resistant polymerized monomer. The composition of the temperature-resistant and salt-resistant profile control agent includes the nanocomposite polymer. The profile control agent of the present application has strong stability and temperature resistance and salt resistance by introducing a functional polymer formed by polymerizing a temperature-resistant and salt-resistant polymer monomer with an inorganic nanosol, so that the profile control agent has strong temperature resistance and salt resistance, and the temperature is above 150°C , and the anti-aging time reaches more than 100 days under the condition of salt concentration of 300,000 mg / L, and the strength of the profile control agent is improved by the inorganic nano-sol.

Description

technical field [0001] The application belongs to the petroleum exploitation technology, and particularly relates 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 waterflooding development of the oilfield, the pore structure and physical parameters of the oilfield change, the heterogeneity of the oil layer intensifies, the injected water enters the high-permeability layer in large quantities, and the interlayer channeling is serious, which greatly reduces the water flooding efficiency. After the cutting, the subsequent injection liquid can still bypass the plugging area and return to the high permeability layer, and the effective period of production increase is short and the effect is poor. Therefore, a deep profile control technology using polymer hydrogels to improve the water flooding effect is more and more widely used, and the oil recove...

Claims

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Application Information

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Patent Type & Authority Patents(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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