Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method of measuring oil-water distribution using dnp-mri

A distribution method, oil-water technology, applied in the direction of using double resonance for analysis, double resonance for measurement, and nuclear magnetic resonance for analysis, etc., can solve problems such as limited application, inability to distinguish effectively, increase test time, etc., to ensure reliability. , The effect of short measurement time and high measurement efficiency

Active Publication Date: 2021-12-03
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under low-field conditions, different fluids are often distinguished by the relaxation or diffusion properties of the sample, but due to the heterogeneity of the material structure and the difference in fluid distribution, different fluids may have the same relaxation or diffusion properties, which cannot be effectively distinguish
In addition, the lower sensitivity and resolution of NMR greatly increases the testing time of samples, and further limits the application of conventional MRI methods in measuring oil-water distribution.

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
  • A method of measuring oil-water distribution using dnp-mri
  • A method of measuring oil-water distribution using dnp-mri
  • A method of measuring oil-water distribution using dnp-mri

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Make glass bead models to simulate porous materials containing oil and water, glass bead models (such as figure 1 Shown) is made as follows: take a quartz tube 1 with a diameter of 10mm, one end of the quartz tube 1 is open, and the other end is sealed, and the glass beads 2 with a particle diameter of 3-5mm are randomly stacked in the 10mm quartz tube. Contains relaxation reagent MnCl 2 Water and mineral oil containing free radical TEMPO (tetramethylpiperidine nitrogen oxide) are layered to infiltrate the glass beads in the quartz tube. The upper layer is the oil phase and the lower layer is the water phase. TEMPO can strengthen the oil phase under DNP conditions. NMR signal, MnCl 2 It can enhance the relaxation of the aqueous phase and suppress the NMR signal of the aqueous phase under DNP conditions;

[0028] 2. Place the glass bead model in the sample area of ​​a 0.06T DNP magnetic resonance imaging system. In this system, the static magnetic field is provided ...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for measuring oil-water distribution by using DNP-MRI. The method comprises: 1. Adding free radicals used for DNP to enhance the NMR signal of the water phase or oil phase in the oil-water-containing sample to be tested; 2. The sample is subjected to an MRI experiment, and an MRI image without DNP enhancement of the sample to be tested is collected; 3. Under the same MRI experimental conditions as in step 2, microwave excitation is applied to perform a DNP-MRI test, and an MRI image of the sample to be tested is collected after DNP enhancement; 4. Comparing the DNP-enhanced MRI image with the non-DNP-enhanced MRI image, in the DNP-enhanced MRI image, the area where the MRI signal intensity is enhanced is the selected enhanced fluid phase distribution area, and the area where the MRI signal intensity does not change significantly is Non-selectively enhanced fluid phase distribution regions. The method is simple, convenient to operate, short in measurement time and high in measurement efficiency.

Description

technical field [0001] The invention belongs to the technical field of nuclear magnetic resonance applications, and in particular relates to a method for measuring oil-water distribution by using DNP-MRI, which can be applied to analyze fluid distribution and flow laws in porous materials. Background technique [0002] Porous materials such as reservoir rocks are rich in different fluid phases such as oil and water. The distribution of oil and water in rock formations is a key issue in the exploration of seepage / displacement laws. The acquisition of two-phase distribution information is helpful for understanding two-phase saturation. Important parameters such as degree and relative permeability can provide reference for reservoir evaluation and development. [0003] NMR technology is widely used in the study of the structure and fluid properties of porous materials such as rock cores due to its non-destructive testing characteristics. [0004] Under high-field NMR, using oi...

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): G01N24/08
CPCG01N24/081G01N24/12G01R33/62G01R33/448Y02A90/30G01R33/56509
Inventor 陈黎陈俊飞刘朝阳张震冯涛冯继文陈方
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com