High-efficiency anti-magnesium ion oil displacement method

An oil displacement method and magnesium ion technology are applied in the field of high-efficiency anti-magnesium ion oil displacement, which can solve the problems of alkali corrosion, high use concentration and poor oil displacement efficiency in ternary composite flooding, and achieve strong ability to reduce interfacial tension, The effect of high salinity resistance and excellent performance

Active Publication Date: 2014-03-05
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the oil displacement agent containing surfactant in the prior art has poor oil displacement efficiency under high temperature and high salt conditions, high use concentration and corrosion and damage caused by alkali in ASP flooding to formation and oil well. Fouling damage problem, providing a new high-efficiency anti-magnesium ion flooding method

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
  • High-efficiency anti-magnesium ion oil displacement method
  • High-efficiency anti-magnesium ion oil displacement method
  • High-efficiency anti-magnesium ion oil displacement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (a) Synthesis of N, N-dilauroyl ethylenediamine dimethyl propionic acid

[0035] 300 grams (1.5 moles) of lauric acid, 267.8 grams (2.25 moles) of thionyl chloride and 4.5 grams of DMF were added to a 1000-milliliter four-necked flask equipped with a sealed mechanical stirrer, a thermometer, a condenser tube, etc., and reacted at 90 ° C for 3 After one hour, excess thionyl chloride was distilled off under reduced pressure to obtain lauroyl chloride. Add 45.0 grams (0.75 moles) of anhydrous ethylenediamine and 180 grams of 1,4-dioxane to another 2000 ml four-neck flask equipped with a sealed mechanical stirrer, a thermometer, and a condenser tube, heat up to 50° C., and slowly Add 165.0 grams (1.65 moles) of methyl methacrylate dropwise, continue the reaction for 3 hours after dropping, remove unreacted methyl methacrylate and solvent 1,4-dioxane under reduced pressure, and the residue is ethylenediamine dioxane. Methyl methpropionate. Use 50wt% sodium hydroxide to adj...

Embodiment 2

[0043] (a) Synthesis of N, N-dilauroyl hexamethylenediamine dimethylpropionic acid

[0044] With [Example 1] (a), the difference replaces 45.0 grams (0.75 moles) of anhydrous ethylenediamine with 87.0 grams (0.75 moles) of anhydrous hexamethylenediamine, and the rest are the same to obtain N, N-dilauroyl Hexamethylenediamine dimethyl propionic acid 328.6 grams, molar yield 67.2%.

[0045] (b) Synthesis of N,N-dilauroylhexamethylene diamine dimethyl propionate dipolyoxyethylene ether (n=3)

[0046] With [Example 1] (b), the difference is 328.6 grams (0.504 moles) of N, N-dilauroyl hexamethylenediamine dimethyl propionic acid instead of 306.2 grams (0.514 moles) of N, N-didodecanoic acid The consumption of acyl ethylenediamine dimethyl propionic acid and oxirane is 133.1g (3.024 moles), and the consumption of the basic compound of calcium is 7.5 grams to obtain N, N-dilauroyl hexamethylene diamine Dipolyoxyethylene methpropionate (n=3) was 409.5 grams, and the molar yield was ...

Embodiment 3

[0052] (a) Synthesis of N, N-didecanoyl butanediamine dimethylpropionic acid

[0053] With [Example 1] (a), the difference replaces 300.0 grams (1.5 moles) of lauric acid with 261.0 grams (1.5 moles) of capric acid, and replaces 45.0 grams (0.75 grams) of anhydrous butanediamine with 66.0 grams (0.75 moles). mol) anhydrous ethylenediamine, and the rest are the same to obtain 283.3 grams of N, N-didecanoyl butanediamine dimethylpropionic acid, and the molar yield is 66.5%.

[0054] (b) Synthesis of N, N-didecanoyl butanediamine dimethyl propionate dipolyoxyethylene ether (n=3)

[0055] With [Example 1] (b), the difference is 283.3 grams (0.499 moles) of N, N-didecanoyl butanediamine dimethyl propionic acid instead of 306.2 grams (0.514 moles) of N, N-dilauroyl The consumption of ethylenediamine dimethylpropionic acid and oxirane is 131.7g (2.994 moles), and the consumption of the basic compound of calcium is 6.4 grams to obtain N, N-didecanoyl butanediamine dimethyl Dipolyoxy...

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
shear viscosityaaaaaaaaaa
shear viscosityaaaaaaaaaa
shear viscosityaaaaaaaaaa
Login to view more

Abstract

The invention relaters to a high-efficiency anti-magnesium ion oil displacement method, mainly aiming at the problems of the prior art that the surface active agent containing oil displacement agent is bad in oil displacement efficiency and high in use concentration under the conditions of high temperature and high salt, and alkali in the ternary composite asp flooding causes corrosion and scaling damage to the stratum and an oil well. By the adoption of the high-efficiency anti-magnesium ion oil displacement method, underground dehydrated crude oil contacts the displacement agent to sufficiently displace the crude oil in a drill core under the conditions of MgCl2 type injected water that the oil displacement temperature is 30-83 DEG C, the total mineralization degree is more than 8000 milligram / L, the Mg2<+> is more than 200 milligram / L, and the Ca2<+> is more than 30 milligram / L, wherein the displacement agent comprises the following components in percentage by mass: (1) 0.01-5.0% of N, N-di-fatty acyl diamine dimethyl propionate di-polyoxyethylene ether di-sulfonate; (2) 0.01-3.0% of polymer; and (3) 92.0-99.98% of injected water. By adopting the technical scheme, the problems can be better solved, and the method can be used for the tertiary oil recovery production of an oil field.

Description

technical field [0001] The invention relates to a high-efficiency anti-magnesium ion flooding method. Background technique [0002] With the development of society and economy, people's demand for oil continues to increase and oil reserves decrease, and oil, as a non-renewable resource, is becoming more and more valuable. The problems we are facing are: first, the contradiction between supply and demand is prominent, the demand for oil is getting bigger and bigger, and new oil fields are getting fewer and fewer; second, there is still a large amount of crude oil left in the depleted oil reservoirs. Primary oil recovery (POR) can produce 10-25% of underground crude oil, and secondary oil recovery (SOR) can recover 15-25% of underground crude oil, that is, primary oil recovery and secondary oil recovery only produce 25-50% of underground crude oil. In order to ensure the long-term stable supply of oil and meet the needs of human beings, it is necessary to research and develop...

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): E21B43/22C09K8/584
Inventor 沈之芹李应成王辉辉袁明
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap