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

Evaluation method for shear resistance and pore throat compatibility of viscoelastic particles

An evaluation method, viscoelasticity technology, applied in particle and sedimentation analysis, using stable shear force to test material strength, flow characteristics, etc., can solve the problem of inability to accurately measure particle pore throat compatibility of viscoelastic particle dispersion system Microscopic evaluation and measurement of particle properties

Active Publication Date: 2019-11-08
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods only evaluate the passing ability and pore-throat compatibility of the system from a macroscopic point of view, and cannot perform microscopic evaluation and measurement on the passing performance of particles. Therefore, the above method still cannot accurately measure the particle pore throat compatibility of the viscoelastic particle dispersion system in the actual migration process.

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
  • Evaluation method for shear resistance and pore throat compatibility of viscoelastic particles
  • Evaluation method for shear resistance and pore throat compatibility of viscoelastic particles
  • Evaluation method for shear resistance and pore throat compatibility of viscoelastic particles

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation of the viscoelastic particle dispersion system includes the following processes: preparation of the dispersion medium and preparation of the viscoelastic particle dispersion system.

[0040] The dispersion medium is one of simulated formation water, field injection water and deionized water.

[0041] The preparation process of the viscoelastic particle dispersion system is as follows: take a container, add a certain amount of dispersion medium into it, stir the dispersion medium and add a certain amount of viscoelastic particles evenly and slowly to avoid agglomeration of the viscoelastic particles, and continue stirring for a period of time. The viscoelastic particles are fully swollen, and the viscoelastic particle dispersion system is obtained.

[0042]Step 102, using a capillary rheometer to perform a shear rheological test on the viscoelastic particle dispersion system;

[0043] figure 1 It is a schematic diagram of a capillary rheometer, wherein ...

Embodiment 1

[0063] This example mainly evaluates the shear resistance performance of viscoelastic particles.

[0064] Experimental materials and equipment: organic viscoelastic particles PPG, composite viscoelastic particles F-PPG, produced by Shengli Oilfield Exploration and Development Research Institute, particle size 100-150 mesh; American IKA cantilever stirrer; British Malvern Rosand RH2000 capillary rheometer ; Anton Paar MCR 302 rheometer in Austria; Microtrac Bluewave laser particle size analyzer in the United States; Olympus optical microscope in Japan.

[0065] The test steps are as follows:

[0066] (1) Preparation of viscoelastic particle dispersion system

[0067] Accurately weigh 5g of the viscoelastic granular oil displacement agent sample (100-150 mesh), accurate to 0.0001g. Weigh 1L of simulated formation water into a 2000mL beaker, turn on the constant speed stirrer and slowly add the sample along the vortex wall at 400r / min for 30s, then stir for 2 hours at a stirrin...

Embodiment 2

[0087] This example mainly evaluates the pore throat compatibility of viscoelastic particles.

[0088] Experimental materials and equipment: PPG viscoelastic particles, produced by Shengli Oilfield Exploration and Development Research Institute, particle size 100-150 mesh; American IKA cantilever stirrer; British Malvern Rosand RH2000 capillary rheometer; Austrian AntonPaar MCR 302 rheometer; American Microtrac Bluewave laser particle size analyzer; Japanese Olympus optical microscope.

[0089] The test steps are as follows:

[0090] (1) Preparation of viscoelastic particle dispersion system

[0091] Accurately weigh 5g of the viscoelastic granular oil displacement agent sample (100-150 mesh), accurate to 0.0001g. Weigh 1L of simulated formation water into a 2000mL beaker, turn on the constant speed stirrer and slowly add the sample along the vortex wall at 400r / min for 30s, then stir for 2 hours at a stirring rate of 500r / min to fully swell the viscoelastic particles , for...

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 size (mesh)aaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides an evaluation method for shear resistance and pore throat compatibility of viscoelastic particles. The evaluation method for shear resistance and pore throat compatibility of viscoelastic particles comprises the following steps: step 1, preparing a viscoelastic particle dispersion system; step 2, carrying out a shear rheological test on the viscoelastic particle dispersion system by using a capillary rheometer; step 3, performing performance evaluation on the sheared filtrate; and step 4, performing data processing to evaluate the shear resistance and pore throat compatibility of the viscoelastic particles. According to the evaluation method for shear resistance and pore throat compatibility of the viscoelastic particles in the invention, the flowing state of the viscoelastic particles penetrating through pores with different dimensions under the field condition can be truly simulated, and important significance in evaluating the injection and seepage performanceof the viscoelastic particles for displacement of reservoir oil is achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method for evaluating the shear resistance and pore throat compatibility of viscoelastic particles. Background technique [0002] In view of the problems that major oilfields in my country have entered the stage of high water-cut oil recovery, intensified formation heterogeneity, and premature water breakthrough in oil wells, we have developed viscoelastic particles with good swelling and elastic deformation capabilities as control and displacement agents for extraction operations. A heterogeneous composite flooding with viscoelastic particles as the main agent has been formed and has been successfully applied in the field. [0003] Viscoelastic particles migrate in the formation in the form of retention-deformation-passing. Therefore, compared with polymers, the polymer chains of viscoelastic particles are more likely to be fractured and deformed due to sh...

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 Applications(China)
IPC IPC(8): G01N3/24G01N11/00G01N11/08G01N15/02
CPCG01N3/24G01N11/00G01N11/08G01N15/02G01N15/0205G01N2203/0025G01N2203/0094G01N2203/0298G01N2015/0294
Inventor 曹绪龙季岩峰祝仰文王其伟窦立霞陈晓彦徐辉庞雪君孙秀芝李海涛
Owner CHINA PETROLEUM & CHEM CORP
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