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Comb-shaped modified polysiloxane anion water-base thick oil viscosity reducer and synthesizing method thereof

A heavy oil viscosity reducer, polysiloxane technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of poor temperature resistance and hydrolysis resistance, poor dispersion stability, and inability to form an electric double layer, etc. problem, to achieve the effect of enhanced salt resistance, good dispersion and viscosity reduction, and strong stability.

Active Publication Date: 2014-01-01
南京美思德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Its structure is a non-ionic surfactant, which cannot form an electric double layer when forming an oil-in-water dispersion system, and its dispersion stability is not as good as that of anionic type; its side chain does not contain long-chain alkyl groups, and its affinity for heavy oil needs to be improved; It adopts a Si-O-C chemical bond structure, and its ability to resist temperature and hydrolysis is not as good as that of Si-C surfactants, so it may be limited in its application to reduce viscosity of heavy oil in high-temperature reservoirs

Method used

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  • Comb-shaped modified polysiloxane anion water-base thick oil viscosity reducer and synthesizing method thereof
  • Comb-shaped modified polysiloxane anion water-base thick oil viscosity reducer and synthesizing method thereof
  • Comb-shaped modified polysiloxane anion water-base thick oil viscosity reducer and synthesizing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix 90g of polymethylhydrogensiloxane (mass fraction of active hydrogen 1.55%), 50g of hexamethyldisiloxane, 100g of octamethylcyclotetrasiloxane, 4.8g of concentrated sulfuric acid, and stir at 60°C for 3 hours , lower the temperature to 30°C, add solid sodium bicarbonate to neutralize to neutrality, then depressurize at -0.04MPa at 90°C to remove moisture and low boilers, and filter to obtain methyl hydrogen-containing silicone oil intermediate 1; take 70g of the intermediate 1. 16.8g of n-dodecene, 160g of allyl polyoxyethylene ether (M=500), adding 20ppm of chloroplatinic acid catalyst, and reacting at 100°C for 2 hours to obtain a comb-shaped structure modified polysiloxane intermediate 2; Take 125g of intermediate 2, 30g of sodium isethionate, and 1.0g of potassium hydroxide, and heat it at 170-180°C for 15 hours under reduced pressure for dehydration to obtain viscous comb-shaped structure modified polysiloxane polyether sulfonic acid sodium. The product is adde...

Embodiment 2

[0036] Mix 120g of polymethylhydrogensiloxane (active hydrogen mass fraction 1.55%), 20g of hexamethyldisiloxane, and 2.8g of concentrated sulfuric acid at 80°C for 2 hours, then cool down to 30°C and add solid sodium bicarbonate Neutralize to neutral, then remove moisture and low boilers under reduced pressure at 100°C -0.03Mpa, filter to obtain methyl hydrogen-containing silicone oil intermediate 1; take 80g intermediate 1, 44.9g n-hexadecene, 180g allyl Polyoxyethylene ether (M=300), add 30ppm chloroplatinic acid catalyst, react at 110°C for 1 hour to obtain comb-shaped structure modified polysiloxane intermediate 2; take 160g of intermediate 2, 35g of sodium chloroacetate, 12g of sodium, heated and reacted at 40-50°C for 4 hours to obtain viscous comb-shaped structure modified polysiloxane polyether sodium acetate. After the product is neutralized, water is added to prepare a product with a solid content of 30%. The product in Example 3 was prepared into 0.5% aqueous solu...

Embodiment 3

[0039] Mix 50g of polymethylhydrogensiloxane (mass fraction of active hydrogen 1.55%), 10g of hexamethyldisiloxane, 90g of octamethylcyclotetrasiloxane, 3.0g of concentrated sulfuric acid, and stir at 70°C for 2 hours , lower the temperature to 30°C and add solid sodium bicarbonate to neutralize to neutral, then decompress at 100°C to -0.03Mpa to remove moisture and low boilers, and filter to obtain methyl hydrogen-containing silicone oil intermediate 1; take 18g of intermediate 1, 12.6 g n-octadecene, 75g allyl polyoxypropylene (10) ethylene (10) ether (M=1050), add 30ppm chloroplatinic acid catalyst, react at 130°C for 1 hour to obtain comb-shaped structure modified polysiloxane Intermediate 2: Heat 105 g of Intermediate 2 and 7.0 g of phosphorus pentoxide at 80°C for 4 hours, add 20 g of water, hydrolyze at 60°C for 1 hour, add 30% sodium hydroxide solution to neutralize to pH = 7, and obtain Viscous comb structure modified polysiloxane polyether sodium phosphate. The prod...

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Abstract

The invention discloses a comb-shaped modified polysiloxane anion water-based thick oil viscosity reducer and a synthesizing method thereof. In the viscosity reducer, a comb-shaped structure in which polydimethylsiloxane is taken as a main chain, long chain alkyl and a propylidene polypropylene oxide polyoxyethylene ether organic acid ester salt are taken as side chains is adopted, the side chains are connected through a Si-C chemical bond, and the viscosity reducer has high surface activity, high interface activity, high temperature resistance, high salt resistance, high hydrolysis property and large viscosity reducing capability on thick oil. The molecular structural general formula of the comb-shaped modified polysiloxane anion water-based thick oil viscosity reducer is shown as (I), wherein polydimethylsiloxane is taken as the main chain of a molecular structure; the long chain alkyl and the propylidene polypropylene oxide polyoxyethylene ether organic acid ester salt are taken as side chains; and the main chain is connected with the side chains through the Si-C chemical bond.

Description

technical field [0001] The present invention relates to a viscosity reducer and its synthesis method, more specifically to a comb-shaped structure modified polysiloxane anionic water-based heavy oil viscosity reducer applied to oilfield heavy oil viscosity reduction exploitation and its synthesis method . Background technique [0002] my country is rich in heavy oil resources. With the shortage of resources and energy, the exploitation of heavy oil is also increasing. The high content of colloidal asphaltenes in heavy oil leads to high viscosity and poor fluidity. To realize normal exploitation and transportation of heavy oil, its viscosity must be reduced and its fluidity increased. The development of high-efficiency heavy oil viscosity reducer to improve the production efficiency of heavy oil and reduce the production cost is of great significance to alleviate the energy shortage in our country. [0003] The water-based heavy oil viscosity reducer uses water as the carri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/46C09K8/588C09K8/584C08G77/398C08G77/392
Inventor 孙宇尹迎阳曾春江
Owner 南京美思德新材料有限公司
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