Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for measuring axial dispersion coefficient of methylene blue in polymer solution

A technology of polymer solution and methylene blue, which is applied to the interwell tracer test interpretation in polymer flooding to provide a reasonable axial dispersion coefficient. Serious polymer shearing and difficult core profile concentration problems, to achieve the effect of high efficiency and short analysis time

Inactive Publication Date: 2013-10-30
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a device and method for determining the axial dispersion coefficient of methylene blue in a polymer solution, so as to solve the problems of lateral dispersion in one-dimensional core, severe polymer shearing, and severe methylene blue adsorption, which lead to difficulty in obtaining and reversing the output curve. Distortion and other problems, so as to study the axial diffusion coefficient of methylene blue under the condition of specific polymer concentration and flow rate, and provide a strong technical basis for the interpretation of tracer tests during and after polymer flooding
[0013] The present invention also solves the problems of great difficulty in detecting the concentration of the core section, complex operation, long time and large error

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
  • Device and method for measuring axial dispersion coefficient of methylene blue in polymer solution
  • Device and method for measuring axial dispersion coefficient of methylene blue in polymer solution
  • Device and method for measuring axial dispersion coefficient of methylene blue in polymer solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (Example 1) The axial dispersion coefficient of methylene blue in a concentration of 1000 mg / L in a polymer solution of 0.5 g / L was measured.

[0087] (1) Prepare 200 mL of a polymer solution with a concentration of 1000 mg / L of partially hydrolyzed polyacrylamide.

[0088] (2) The polymer solution is divided into two parts, one part is directly put into the first intermediate container 4, and the other part is added with methylene blue to be mixed with a polymer solution containing 0.5g / L methylene blue, and then put into the second intermediate container 5;

[0089] (3) Adjust the first six-way valve 10 and the second six-way valve 14, start the micro pump, so that the polymer solution in the first intermediate container slowly flows into the slow flow tank of the glass plate model through the injection hole 7-6, and then parallel Flow into the gap, and close the valve after the polymer solution without methylene blue is filled with the glass plate model;

[0090] (...

Embodiment 3

[0099](Example 3) The axial dispersion coefficient of methylene blue having a concentration of 0.5 g / L in a partially hydrolyzed polyacrylamide polymer solution having a concentration of 1500 mg / L was measured.

[0100] Prepare 200 mL of a polymer solution with a concentration of 1500 mg / L of partially hydrolyzed polyacrylamide. Using the same steps as in Example 1, the axial diffusion coefficient of the methylene blue of 0.5 g / L in the partially hydrolyzed polyacrylamide polymer solution of 1500 mg / L measured is 0.0245 cm 2 / s.

Embodiment 4

[0101] (Example 4) The axial dispersion coefficient of methylene blue having a concentration of 1 g / L in a partially hydrolyzed polyacrylamide polymer solution having a concentration of 1000 mg / L was measured.

[0102] Prepare 200 mL of a polymer solution with a concentration of 1000 mg / L of partially hydrolyzed polyacrylamide. Using the same steps as in Example 1, the axial diffusion coefficient of the methylene blue measured to obtain 1g / L in the polymer solution with a concentration of 1000mg / L is 0.0215cm 2 / s.

[0103] The invention uses a parallel glass model to measure the diffusion coefficient of methylene blue in a polymer solution, the method is simple, the glass model is convenient to make, the cost is low, and it can be reused. The measured diffusion coefficient is the value of using methylene blue as a tracer in polymer flooding The quantitative description of the tracer test provides strong support.

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 device and a method for measuring axial dispersion coefficient of methylene blue in polymer solution. The device for measuring the axial dispersion coefficient of the methylene blue in the polymer solution comprises a glass slab model made of glass, wherein the glass slab model is provided with an internal channel; the internal channel comprises an inlet and a horizontal straight channel communicated with the inlet; the inlet is connected with a displacement system; and each radial section of the straight channel has the same shape and the same area. The invention also provides the method for measuring the axial dispersion coefficient of the methylene blue in the polymer solution. The method comprises the following steps: a, performing displacement test in the horizontal straight channel, wherein the side wall of the horizontal straight channel is made of glass; b, setting an observation point on the straight channel, photographing the color of the solution at the observation point and performing image acquisition to acquire a color image; c, converting the solution color image obtained by photographing at the observation point into a gray-scale image; and d, converting the gray scale into concentration.

Description

technical field [0001] The invention relates to oil reservoir engineering, and belongs to a device and method for measuring the axial dispersion coefficient of methylene blue in a polymer solution, specifically providing a reasonable axial dispersion coefficient for interwell tracer test interpretation in polymer flooding. Background technique [0002] At present, large-scale polymer flooding tests have been carried out in some major oil reservoirs in China. The dynamic changes of reservoirs and heterogeneity after polymer flooding urgently need a more accurate and quantitative description, so as to improve oil recovery after polymer flooding. Technology provides the foundation. Among them, one of the most important research directions is the understanding of interwell, interlayer and intralayer dynamic heterogeneity, displacement status, residual potential and important characteristic parameters. This accumulation-driven dynamic problem needs to be solved by interwell monit...

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): G01N13/00
Inventor 刘同敬李俊键姜汉桥李金宜张贤松陈民锋刘奋王硕亮
Owner CHINA UNIV OF PETROLEUM (BEIJING)