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

Method for determinating permeability of fluid in porous medium

A technology of porous media and measurement methods, which is applied in the field of measurement of porous media permeability, can solve the problems of long time-consuming, difficult operation of radial flow core displacement, and few calculation methods of radial flow oil and water, etc., to overcome defects, Accurately Calculated Effects

Inactive Publication Date: 2018-06-29
CHINA UNIV OF MINING & TECH
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty and time-consuming operation of radial flow core displacement experiments, and the lack of theoretical research on fluid radial seepage, there are few existing calculation methods for radial flow oil-water relative permeability curves.

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
  • Method for determinating permeability of fluid in porous medium
  • Method for determinating permeability of fluid in porous medium
  • Method for determinating permeability of fluid in porous medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1-Figure 9 As shown, the measurement method of fluid permeability in porous media provided by this embodiment is as follows by carrying out a radial flow core displacement experiment on a natural water-wet sandstone reservoir in an oilfield and carrying out a radial flow core displacement experiment in conjunction with the accompanying drawings. The content and realization principle of the present invention will be described in detail.

[0040] 1. Carry out radial flow core displacement experiments and collect phase permeability experiment data

[0041] according to figure 1 The radial flow core displacement experimental device is designed as shown, and the radial flow core displacement experiment is carried out on the disc-shaped core samples taken from the natural water-wet sandstone reservoir in an oilfield. The radial flow characteristics are as follows: figure 2 Table 1 shows the basic parameters of simulating disc-shaped rock samples. During th...

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

No PUM Login to View More

Abstract

The invention provides a method for determinating the permeability of a fluid in a porous medium. The method comprises the following steps: establishing a control model for fluid flow in the porous medium by using a steady-state Stokes equation, and dividing the porous medium into a plurality of staggered grids; enabling a fluid to flow in the porous medium in a first direction, establishing a least squares objective function by selecting displacement pressure differences at different times and cumulative production as dynamic data on the basis of a radial-flow core displacement experiment, characterizing an oil-water relative permeability curve by using a cubic uniform spline model, and in combination with a radial-flow numerical simulator, continuously adjusting a control parameter vector of a phase permeability characterizing model by a Levenberg-Marquardt algorithm so as to minimize a quadratic sum of errors of observed values and predicted values of the dynamic data. According tothe scheme, the oil-water relative permeability curve can be accurately calculated on the basis of processing of radial-flow core displacement experimental data, and an effective tool is provided forstudying the percolation mechanism of oil, water, asphalt and a resin fluid in the porous medium.

Description

technical field [0001] The invention relates to the technical field of a method for measuring the permeability of a porous medium, in particular to a method for measuring the permeability of a fluid in a porous medium. Background technique [0002] At present, the oil-water relative permeability curve is an important data in reservoir development, which can reflect the seepage law of oil and water phase fluid in porous media. The oil-water relative permeability curve is mainly obtained through unidirectional flow core displacement experiments, and the calculation method is mainly based on analytical methods such as JBN. However, due to the ideal assumption conditions of the analytical method, the calculation accuracy of the relative permeability curve is often low. Numerical inversion methods based on automatic history fitting technology have developed rapidly in the past decade. Compared with the analytical method, when the numerical inversion method is applied indoors, it...

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
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 王启立于鸣泉巩建南
Owner CHINA UNIV OF MINING & TECH
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