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Dispersion drag-reduction agent for high-salinity thick oil

A technology of high salinity and drag reducing agent, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as difficulties and achieve good wetting, emulsifying and dispersing effects.

Inactive Publication Date: 2009-12-30
SHANDONG NORMAL UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for heavy oil in high-salinity reservoirs, since the surface tension of brine is much higher than that of low-salinity water, it is difficult for general active agents to reduce the surface tension of brine to form O / W emulsion

Method used

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  • Dispersion drag-reduction agent for high-salinity thick oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Composition of high salinity heavy oil dispersion drag reducer:

[0026] Component Mass (Kg)

[0027] Unsaturated polyether (industrial grade) 128Kg

[0028] Sodium alkyl sulfonate (industrial grade) 2Kg

[0029] PE-D2 (industrial grade) 13Kg

[0030] Synthesis of unsaturated polyethers:

[0031] 1) In a 1000L synthesis kettle, add 361Kg oleic acid polyoxyethylene ether (industrial grade, anhydrous), then heat to 40°C and melt until uniform;

[0032] 2) Under the protection of nitrogen, slowly add 5.8Kg of chlorosulfonic acid into the synthesis kettle, stir while adding, keep at 40°C, and keep the temperature at 40°C (±2°C) for 1 hour after the addition;

[0033] 3) Raise the temperature of the reactant in the synthesis kettle to 80°C, keep it warm for 1 hour, then make NaOH into an aqueous solution with a mass fraction of 20%, slowly add it into the synthesis kettle at 40°C, stir while adding, until the pH is adjusted to 8 (±0.2).

[0034] Preparation of high sal...

Embodiment 2

[0036] Composition of high salinity heavy oil dispersion drag reducer:

[0037] Component Mass (Kg)

[0038] Unsaturated polyether (industrial grade) 128Kg

[0039] Sodium alkyl sulfonate (industrial grade) 5Kg

[0040] PE-D2 (industrial grade) 10Kg

[0041] Synthesis of unsaturated polyethers:

[0042] 1) In a 1000L synthesis kettle, add 255Kg allyl alcohol polyoxypropylene polyoxyethylene ether (industrial grade, anhydrous, etc.), then heat to 40°C and melt until uniform;

[0043] 2) Under the protection of nitrogen, slowly add 5.8Kg of chlorosulfonic acid into the synthesis kettle, stir while adding, keep at 40°C, and keep the temperature at 40°C (±2°C) for 1 hour after the addition;

[0044] 3) Raise the temperature of the reactant in the synthesis kettle to 80°C, keep it warm for 1.5 hours, then make NaOH into an aqueous solution with a mass fraction of 20%, slowly add it into the synthesis kettle at 40°C, stir while adding, until the pH is adjusted to 8 (±0.2).

[...

Embodiment 3

[0047] The salinity resistance test of the high salinity thick oil dispersion drag reducer of the present invention: first make the high salinity thick oil dispersion drag reducer into a 1%-0.1% active aqueous solution, and then add it to the oil with the pump used in the oil field In, the mass ratio of active aqueous solution and oil is 1:3, and the results are shown in Table 1 and Table 2.

[0048] Table 1

[0049] match

party

crude oil mine

degree

mg / L

crude oil

viscosity

mPa.S

temperature

(℃)

oil to water ratio

oil: water

Dosage

(PPm)

doped raw

oil emulsion

viscosity

(mPa.S)

lotion type

Stable effect

fruit

match

party

1

200000

mg / L

10000

0

50

3∶1

500

250

O / W

Stablize

match

party

...

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Abstract

The invention discloses a dispersion drag-reduction agent for high-salinity thick oil, which comprises the following components by weight part: 90 to 70 parts of unsaturated polyether, 0.5 to 5 parts of alkyl sulfonate and 25 to 30 parts of PE-D. The dispersion drag-reduction agent for high salinity thick oil has a good wetting emulsification dispersion function for high-salinity thick oil, and can rapidly disperse high salinity crude oil in water. The dispersion drag-reduction agent for high-salinity thick oil can resist 2000 to 200,000mg / l of alkali metal salt and 0 to 20000mg / l of alkaline-earth metal salt.

Description

technical field [0001] The invention relates to a high-salinity heavy oil dispersing drag reducer used for the exploitation and transportation of high-salinity heavy oil in oilfields. Background technique [0002] In crude oil reservoirs, formation water has high salinity and crude oil has high viscosity, which is high salinity heavy oil. The Chinese patent No. 98120311 discloses "a crude oil viscosity reducer", which is composed of the following (percentage by weight): lignin (0-55), AES (12-16), polyacrylamide (1- 10), sodium tripolyphosphate (2.5-5), sodium hydroxide (0-5), mixed and stirred. The technology provided by this patent is to emulsify, disperse, and reduce the viscosity of crude oil by using surfactant compounding, but it does not indicate that the active agent compounding system can be used to disperse and reduce viscosity of high salinity heavy oil. [0003] In 2002, the inventor of the patent applied for the patent of "a new type of drag and viscosity redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C08G65/321
Inventor 辛寅昌孙宇侯尔群尹迎阳
Owner SHANDONG NORMAL UNIV
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