Unlock instant, AI-driven research and patent intelligence for your innovation.

Hydrophobically associating polymer-diethanolamide type dual compound driving system

A technology of diethanolamide and binary compound flooding, which is applied in the direction of drilling compositions, chemical instruments and methods, and can solve the problems of high molecular weight products with poor injectivity and shear resistance, high concentration and uneconomical use, and viscosity increase. Weak capacity and other problems, to achieve the effect of avoiding scaling problems, low price, and reducing the amount of polymer used

Inactive Publication Date: 2012-07-04
SICHUAN GUANGYA POLYMER CHEM +1
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Partially hydrolyzed polyacrylamide is mainly used as the thickener in the current binary compound flooding system, but conventional partially hydrolyzed polyacrylamide has weak viscosity-increasing ability,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrophobically associating polymer-diethanolamide type dual compound driving system
  • Hydrophobically associating polymer-diethanolamide type dual compound driving system
  • Hydrophobically associating polymer-diethanolamide type dual compound driving system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The main components and contents are by mass percentage:

[0029] Hydrophobically associating polymers: 0.08%

[0030] Surfactant: 0.05~0.30%,

[0031] Experimental conditions

[0032] Associative polymer solution preparation temperature: 25°C

[0033] Dissolving time: 2h

[0034] Test temperature: 45°C,

[0035] Water: Sewage from Polymerization Station of Daqing No. 4 Plant

[0036] Oil: Oil from Daqing No.4 Factory

[0037] Experimental instrument: 500 type spinning drop interfacial tensiometer Brookfield viscometer

[0038] Table 1 2-hour equilibrium interfacial tension

[0039] Diethanolamide concentration / % 0.05 0.10 0.15 0.20 0.25 0.30 Interfacial tension / mN / m 0.002939 0.003714 0.003315 0.002532 0.002956 0.002166

Embodiment 2

[0041] The main components and contents are by mass percentage:

[0042] Hydrophobically associating polymers: 0.15%

[0043] Surfactant: 0.05~0.30%,

[0044] Experimental condition is the same as embodiment 1.

[0045] Table 2 Equilibrium interfacial tension in 2 hours

[0046] Diethanolamide concentration / % 0.05 0.10 0.15 0.20 0.25 0.30 Interfacial tension / mN / m 0.003744 0.003574 0.003607 0.002319 0.002503 0.002319

Embodiment 3

[0048] The main components and contents are by mass percentage:

[0049] Hydrophobically associating polymers: 0.20%

[0050] Surfactant: 0.05~0.30%,

[0051] Experimental condition is the same as embodiment 1.

[0052] Table 3 Equilibrium interfacial tension in 2 hours

[0053] Diethanolamide concentration / % 0.05 0.10 0.15 0.20 0.25 0.30 Interfacial tension / mN / m 0.005641 0.004471 0.004485 0.003216 0.002643 0.002218

[0054] Reducing the oil-water interfacial tension in the composite flooding system can improve the oil washing efficiency. It can be seen from Table 1-3 that the hydrophobic association polymer and diethanolamide have good compatibility. High interfacial activity, can make the oil-water interfacial tension reach 10 -3 mN / m.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a hydrophobically associating polymer-diethanolamide type dual compound driving system, which is characterized by comprising main components in the following weight percentage: 0.08-0.20 percent of hydrophobically associating polymer, 0.05-0.30 percent of diethanolamide and 99.50-99.87 percent of water. The solution viscosity of the oil driving system can be adjusted according to needs, the mobility ratio can be controlled effectively, the oil-water interfacial tension can reach the lowest value 10<-3>N/m, and the recovery ratio can be improved greatly. Meanwhile, an oil layer, wellbore and pipeline cannot be damaged since no alkali is added in the system. The consumption of the polymer can be reduced greatly, the cost of the oil driving system can be decreased, and the large-scale promotion in an oil field can be facilitated.

Description

technical field [0001] The invention relates to a compound flooding system in tertiary oil recovery, in particular to a binary compound flooding system of hydrophobic association polymer-diethanolamide used in tertiary oil recovery. Background technique [0002] Most of the crude oil in the formation still has not been recovered after primary and secondary oil recovery. Laboratory experiments and mine field tests show that the ASP flooding based on polymer / alkali / surfactant compound can further increase the recovery rate by more than 20% on the basis of water flooding, and it is a relatively mature technology for tertiary oil recovery at present. . But ASP flooding also has a lot of problems. Due to the use of high-concentration alkali, the abundant calcium and magnesium ions in the formation water are easy to react with the alkali in the oil displacement system to produce precipitation, resulting in serious scaling in the wellbore of the oil production well; and the stron...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K8/588C09K8/584C08F220/56C08F8/12
Inventor 张新民郭拥军付春燕胡俊李华兵郭爱民
Owner SICHUAN GUANGYA POLYMER CHEM