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Preparation of inorganic silicophosphate oligomer and application thereof

A silicophosphate and oligomer technology, applied in inorganic chemistry, silicon compounds, drilling compositions, etc., can solve the problems of ternary production well scaling, bottom layer damage, stuck pump, etc., achieving low cost, huge Economic benefits and the effect of enhanced oil recovery

Active Publication Date: 2010-03-17
DAQING HUAYING CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it was also found in the mines that due to the use of high-concentration strong alkali, various mines had problems such as damage to the bottom layer, fouling of ternary production wells, pump jams, and broken rods to varying degrees.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At room temperature, take 30 parts of Na 3 SiO 3 Dissolve in 350 parts of water, stir for 20 minutes, after the solution is clarified, add 40 parts of Na 3 PO 4 Stir for 60 minutes, add 2 parts of cross-linking agent HLX-1 after the solution is clarified, and continue stirring for 3 hours. Then the temperature was raised to 65° C., and the temperature was kept constant for 9 hours, and the solvent was evaporated until white powder was obtained. Put the white powder into a high-temperature furnace at 850°C and bake for 8 hours, then cool down to room temperature until the transparent solid is the inorganic silicon phosphate oligomer. The product is soluble in water.

Embodiment 2

[0030] At room temperature, take 20 parts of Na 2 SiO 3 Dissolve in 350 parts of water, stir for 20 minutes, after the solution is clarified, add 60 parts of Na 3 PO 4 Stir for 60 minutes, add 3 parts of cross-linking agent HLX-1 after the solution is clarified, and continue stirring for 3 hours. Then the temperature was raised to 75°C, and the temperature was kept constant for 8 hours, and the solvent was evaporated until white powder was obtained. Put the white powder into a high-temperature furnace at 900°C and bake for 6 hours, then cool down to room temperature until the transparent solid is the inorganic silicon phosphate oligomer. The product is soluble in water.

Embodiment 3

[0032] At room temperature, take 50 parts of Na 2 SiO 3 Dissolve in 500 parts of water, stir for 20 minutes, after the solution is clarified, add 20 parts of Na 3 PO 4 Stir for 60 minutes, add 5 parts of cross-linking agent HLX-1 after the solution is clarified, and continue stirring for 4 hours. Then the temperature was raised to 80° C., and the temperature was kept constant for 12 hours, and the solvent was evaporated until white powder was obtained. Put the white powder into a high-temperature furnace at 950°C and bake for 8 hours, then cool down to room temperature until the transparent solid is the inorganic silicon phosphate oligomer. The product is soluble in water.

[0033] 1. Determination of corrosion inhibition performance:

[0034] In the following examples, according to the "National Standard of the People's Republic of China GB / T18175-2000, Determination of Corrosion Inhibition Performance of Water Treatment Agents - Rotary Coupon Method", RCC-I Rotary Coupo...

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PUM

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Abstract

The invention relates to preparation of inorganic silicophosphate oligomer and application thereof; the preparation method of the inorganic silicophosphate oligomer comprises the following steps: in the room temperature, taking 10-50 parts of Na2SiO3 to be dissolved in 300-500 parts of water and stirred for 20 minutes; after solution is clear, adding 10-60 parts of Na3PO4 to be stirred for 60 minutes; after solution is clear, adding 1-5 parts of crosslinker to continue stirring for 3-4 hours, and then heating up to 60-80 DEG C, and keeping constant temperature for 8-12 hours; and dying the solvent by distillation to obtain white powder, putting the white powder into a high temperature furnace for roasting for 6-8 hours at the temperature of 800-1000 DEG C, and reducing to room temperatureto obtain transparent solid body, namely, the inorganic silicophosphate oligomer. The inorganic silicophosphate oligomer, a surface active agent and a polymer form new ternary compound system; and theinorganic silicophosphate oligomer and crude oil form ultra interfacial tension, thus greatly increasing crude oil recovery ratio, and simultaneously having corrosion inhibition and scaling resistance performances.

Description

Technical field: [0001] The invention relates to a new inorganic silicon phosphate oligomer used for oil recovery in oilfields, in particular to a method for replacing the strong alkali in the current three-way compound flooding ASP system with the inorganic silicon phosphate oligomer. Background technique: [0002] ASP flooding technology is a new enhanced oil recovery method developed in recent years following polymer flooding in oilfield production. This technology has become the main replacement oil recovery technology for sustained and stable crude oil production. ASP flooding is composed of alkali, surfactant and polymer, and each component is made into an oil displacement system according to a certain ratio, referred to as ASP. Judging from the results of the already used ASP flooding in oilfields and mines, the recovery rate is more than 20% higher than that of water flooding, and its economic and social benefits are very considerable. However, it was also found in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C09K8/58
Inventor 孙安顺
Owner DAQING HUAYING CHEM IND
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