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

Surfactant composition suitable for low calcium and magnesium oil reservoir, preparation method and application thereof

The technology of a surfactant and a composition is applied to a surfactant composition suitable for low calcium and magnesium oil reservoirs and its preparation and application fields, and can solve the problems of poor temperature resistance and salt resistance and high preparation cost

Active Publication Date: 2018-09-14
CHINA PETROLEUM & CHEM CORP +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the surfactant used as the main component of the low-calcium-magnesium reservoir oil displacement agent system in the prior art has the problems of high preparation cost and poor temperature and salt resistance. Surfactant composition in low calcium and magnesium reservoirs

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
  • Surfactant composition suitable for low calcium and magnesium oil reservoir, preparation method and application thereof
  • Surfactant composition suitable for low calcium and magnesium oil reservoir, preparation method and application thereof
  • Surfactant composition suitable for low calcium and magnesium oil reservoir, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055]

[0056] (1)Z 1 = H, Z 2 =H, nonionic surfactant; (2) Z 1 = H, Z 2 =-CH 2 CH 2 SO 3 Na, monophilic head group ionic surfactant; (3) Z 1 = Z 2 =-CH 2 CH 2 SO 3 Na, amphiphilic headgroup ionic surfactant; R 1 The carbon chain distribution is: C 12 61.9wt%, C 14 21.8wt%, C 16 16.3wt%; m 1 +m 2 = 3, n 1 +n 2 =40, m 3 +m 4 =4.

[0057] Add 200.4 grams (1 mole) of mixed carbon chains (C 12～16 ) amine and 9.5 grams of potassium hydroxide are heated to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then replace with nitrogen for 3-4 times, adjust the reaction temperature of the system to 110°C and slowly introduce 132.9 Gram (3.02 moles) ethylene oxide, control pressure ≤ 0.50MPa, after the completion of the ethylene oxide reaction, slowly feed 2349.0 grams (40.5 moles) propylene oxide at 150 ° C, control pressure ≤ 0.60MPa, wait for the ring After the oxypropylene reaction, the temperature was adjusted to 130° C. and 178.2 ...

Embodiment 2

[0060] With [Example 1], the difference is that after the reaction finishes, all the reaction solutions are acidified, washed with water, and evaporated to remove the solvent, then the resulting mixture is mixed with water, and the pH of the system is adjusted with 40wt% aqueous sodium hydroxide solution. 13. Obtain the desired surfactant composition S-2.

Embodiment 3

[0062]

[0063] (1)Z 1 = H, Z 2 =H, nonionic surfactant; (2) Z 1 = H, Z 2 =-CH 2 CH 2 SO 3 H.N(CH 2 CH 2 Oh) 3 , monohydrophilic head group ionic surfactant; (3) Z 1 = Z 2 =-CH 2 CH 2 SO 3 H.N(CH 2 CH 2 Oh) 3 , double hydrophilic head group ionic surfactant; R 1 The carbon chain distribution is: C 12 61.9wt%, C 14 21.8wt%, C 16 16.3wt%; m 1 +m 2 = 3, n 1 +n 2 =40,m 3 +m 4 =4.

[0064] Same as [Example 2], except that 98% triethanolamine was used instead of 40wt% aqueous sodium hydroxide solution to adjust the pH of the system to 13 to obtain the desired surfactant composition S-3.

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

PropertyMeasurementUnit
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a surfactant composition suitable for low-calcium low-magnesium oil deposits, a preparing method thereof and applications of the surfactant composition, and mainly overcomes problems of surfactants adopted as oil displacement agent systems in the prior art, namely high preparation costs and poor temperature resistance. According to a technical scheme, the surfactant composition comprises nonionic surfactants shown as a formula (1), anionic surfactants having one hydrophilic head group and shown as a formula (2) and anionic surfactants having two hydrophilic head groups and shown as a formula (3), wherein R1, R2 and R3 are C4-C40 aliphatic alkyl or aryl substituted by straight-chain or branch-chain, saturated or unsaturated C4-C30 alkyl, Z1, Z2 and Z3 are respectively -R<01>Y1, -R<02>Y2 and -R<03>Y3, R4, R5, R6 and R7 are independently selected from H, (CH2)pOH or (CH2)qCH3, the p is 2-4 and the q is 0-5. The problems are overcome by adoption of the technical scheme. The surfactant composition can be used for oil production technologies of the low-calcium low-magnesium oil deposits.

Description

technical field [0001] The invention relates to a surfactant suitable for low-calcium-magnesium oil reservoirs, a preparation method and application. Background technique [0002] Enhanced oil recovery technology, that is, the enhanced (EOR) and improved (IOR) oil recovery technology commonly referred to abroad, can be summarized as improving water flooding, chemical flooding, heavy oil thermal recovery, gas flooding, microbial oil recovery and physical oil recovery, etc. Six aspects. At present, the enhanced oil recovery technologies that have entered the large-scale application in mine fields are concentrated in three categories: thermal recovery, gas flooding and chemical flooding, of which the production of chemical flooding is 5.18×10 4 m 3 / d or more, accounting for about 14.7% of the world's total EOR production. Chemical flooding is an enhanced measure to enhance oil recovery by adding chemical agents to the aqueous solution to change the physical and chemical pro...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C08G65/338
Inventor 沈之芹李应成沙鸥张卫东
Owner CHINA PETROLEUM & CHEM CORP