High-temperature high-salt resistant nano emulsion viscosity-reducing agent

An emulsification viscosity reduction and high temperature resistance technology, which is applied in chemical instruments and methods, drilling compositions, piping systems, etc., can solve the problems of small viscosity reduction and short cycle, so as to reduce interfacial tension, improve seepage capacity, The effect of widening the range of adaptation

Inactive Publication Date: 2009-07-22
SOUTHWEST PETROLEUM UNIV
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: in order to overcome the shortcomings of single use of surfactant steam injection, small viscosity reduction range and short cycle, the organic acid in crude oil is used to reduce the amount of surfactant, and the addition of alkaline additives and nano additives , produce a synergistic effect with the emulsifying viscosity reducer to significantly improve the effect of emulsifying viscosity reducing, and provide a high-temperature and high-salt nano-emulsion viscosity reducing agent

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0009] Example 1: Anti-high temperature and high salt nanoemulsion viscosity reducer and preparation method thereof

[0010] (1) Modification of nano additives:

[0011] Weigh 100g of active nano-ZnO and dry it at 80°C, pour it into a 5000ml plastic bucket, cover it, and leave a small hole in the lid; take 0.5ml of silane coupling agent, and then dilute it with 10ml of acetone; Pour the solvent into the cleaned compressor barrel and cover it. Increase the pressure of the compressor and control it at about 0.4MPa. Use a spray gun to spray the prepared solvent into the small bucket containing the active nano-ZnO, and keep stirring timely. Finally, dry the modified nano-ZnO at 85°C to volatilize the acetone Lose.

[0012] (2) Indoor sampling formula and steps of high temperature and high salt nanoemulsion viscosity reducer:

[0013] A weighs the large beaker M with a balance 1 quality and record, then weigh sodium lignosulfonate 37.5g and put it into M 1 middle.

[0014] B ...

example 2

[0018] Example 2: Preparation of crude oil emulsion and its viscosity-reducing effect:

[0019] Weigh 100g of crude oil with a balance and put it into a 500ml large beaker M3, add 0.24g of the prepared viscosity reducer into it, and finally add 43ml of water according to the oil-water ratio of 7:3, and use a glass rod in a constant temperature water bath (about 50 degrees Celsius). Stir, the thick oil becomes light brown and easy to flow.

[0020] The viscosity-reducing effect is shown in the table below:

[0021] Table 1

[0022] Amount / %wt

Viscosity / mPa.s

Viscosity reduction rate / %

Emulsification

0.1

120.4

98.76

evenly dispersed

0.2

68.7

99.19

evenly dispersed

0.3

14.6

99.85

evenly dispersed

0.4

23.3

99.76

evenly dispersed

0.5

61.2

99.37

evenly dispersed

[0023] The research conditions of this experiment are: the crude oi...

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
Login to view more

Abstract

The invention relates to a high-temperature and high-salt-resistant nano-emulsion viscosity reducer used for heavy oil exploitation and transportation. It uses surfactants, and at the same time adds alkaline additives and nano additives to significantly improve the effect of emulsification and viscosity reduction. The viscosity reducer is composed of non-ionic surfactant, anionic surfactant, modified nano additive, NaOH, accelerator and water. The preparation method is: add 5-7% of OP-10, 2-5% of accelerator, 0.5-2% of modified nano additives at normal temperature and pressure, and stir evenly; then add anionic surfactant 30-45 %, add O1~3% flatly; finally add NaOH 20~30% and water 20~40%, and then stir continuously at a speed of 60~120r / min for 60~90min to obtain this nanoemulsion viscosity reducer product. The viscosity reducer system has good stability and will not coalesce during storage; the formed oil-in-water particles are smaller and more uniform, which improves the seepage capacity; it can greatly reduce interfacial tension and improve oil displacement efficiency, and can be used for heavy oil recovery and delivery fields.

Description

technical field [0001] The invention relates to a high-temperature and high-salt-resistant nano-emulsion viscosity reducer used in the field of petroleum exploitation for the exploitation and transportation of heavy oil. Background technique [0002] At present, although there are many formulations of emulsified viscosity reducers, there are still many problems: ①It is difficult to treat produced fluid sewage; ②Emulsified viscosity reducers have strong selectivity to heavy oil and are not universal; ③Currently However, there are not many emulsified viscosity reducers that can be used in high-temperature and high-salinity reservoir conditions. Even if there are some reports in the literature, most of them are relatively expensive. Therefore, it is an important development direction of emulsification viscosity reduction technology to study cheap salt-resistant and high-temperature-resistant viscosity reducers. In addition, in view of the fact that most of the old oil fields w...

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): C09K8/52F17D1/17
Inventor 王霞陈玉祥刘多容
Owner SOUTHWEST PETROLEUM UNIV
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