Device for researching carbon dioxide diffusion front edge and method of device

A technology of carbon dioxide and leading edge, applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve high sensitivity, fast acquisition, and overcoming disturbance effects

Inactive Publication Date: 2016-11-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Device for researching carbon dioxide diffusion front edge and method of device
  • Device for researching carbon dioxide diffusion front edge and method of device
  • Device for researching carbon dioxide diffusion front edge and method of device

Examples

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Embodiment 1

[0058] This embodiment provides a device for studying the carbon dioxide diffusion front, and the device is composed of a carbon dioxide injection system, a pressure buffer, a detection system, a liquid injection system, and a vacuum pumping system;

[0059] The carbon dioxide injection system is composed of a carbon dioxide cylinder 8 and a pressure sensor 10;

[0060] The pressure buffer part is a pressure buffer tank 12, and the pressure buffer tank is a tank body with a through hole at one end, and the through hole is provided with a pipeline that communicates with the outside world;

[0061] The detection system includes a quartz tube 7 (length 1m, inner diameter 2.2cm, wall thickness 0.4cm), a first interface and a second interface; the first interface is installed on the upper port of the quartz tube, and the second interface is installed on the lower part of the quartz tube. port; the first interface and the second interface are inner plug interface flanges made of sta...

Embodiment 2

[0068] This embodiment provides a method for studying the carbon dioxide diffusion front. The method uses the device in Embodiment 1, and the specific steps are:

[0069] (1) carry out the diffusion experiment of carbon dioxide using the device for studying the carbon dioxide diffusion front in Example 1 to obtain the data of the advancing distance of the diffusion front and the carbon dioxide injection time; the steps include:

[0070] ①Inject the prepared detection solution (0.8mol / L NaCl solution, which contains 0.02% litmus) into the liquid storage container;

[0071] ②After opening and closing the corresponding valve, turn on the vacuum pump to vacuumize the liquid storage container for 4 hours;

[0072] ③Inject the detection solution in the liquid storage container into the quartz tube;

[0073] ④ Set the output pressure of the carbon dioxide gas cylinder to 200KPa, and start gas injection (after the gas injection starts, the color starts to change in about 30 seconds, ...

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Abstract

The invention provides a device for researching a carbon dioxide diffusion front edge and a method of the device. The device for researching the carbon dioxide diffusion front edge comprises a carbon dioxide injection system, a detecting system and a liquid injection system, wherein the carbon dioxide injection system comprises a carbon dioxide gas cylinder; the detecting system comprises a transparent detecting tube and a connector which communicates with an external pipeline; the connector comprises a first connector and a second connector; the liquid injection system comprises a liquid storage container; the gas cylinder communicates with the first connector; the first connector communicates with one end of the transparent detecting tube; the other end of the transparent detecting tube communicates with the second connector; and the second connector communicates with the liquid storage container. The experimental device can realize online measurement, has the characteristics of high speed and high sensitivity, and provides a new way for indoor research of carbon dioxide diffusion behaviors.

Description

technical field [0001] The invention belongs to the technical field of oil and gas production engineering in oil fields, and in particular relates to a device and a method for studying the diffusion front of carbon dioxide. Background technique [0002] The diffusion behavior of carbon dioxide plays an important role in the field of carbon dioxide injection for enhanced oil recovery and its safe geological storage, and a lot of work has been done in this area. As early as 1988, Renner measured the diffusion coefficient of carbon dioxide in a NaCl solution with a concentration of 0.25N at a temperature of 38°C and a pressure of 1544-5833KPa. In 1996, L.-S.Wang et al. and the diffusion coefficient of carbon dioxide in NaCl solution and octane under pressure. In 2008, M. Bahar and K. Liu obtained the diffusion coefficient of carbon dioxide in formation water through the pressure drop during the diffusion process. Min Hao et al. combined nuclear magnetic resonance technology, T...

Claims

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Application Information

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IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 赵仁保杨娇龙许梦凡衡明浩岳湘安
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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