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

Device and method for determining molecular diffusion coefficient of multi-component gas-liquid system in rock core

A molecular diffusion and multi-component technology, which is applied in the field of devices for determining the molecular diffusion coefficient of multi-component oil and gas systems, can solve the problem that the molecular diffusion coefficient cannot be determined, the molecular diffusion coefficient test method does not consider the influence of porous media, and the temperature and pressure conditions are up to It does not meet the requirements of oilfield gas injection and other problems, and achieves the effect of simple and reliable principle, high precision and guaranteed precision

Active Publication Date: 2012-08-22
SOUTHWEST PETROLEUM UNIV
View PDF7 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The theoretical estimation method is only applicable to the calculation of the diffusion coefficient of single-component or three-component oil and gas molecules;
[0005] (2) Most of the molecular diffusion coefficient test methods do not consider the influence of porous media;
[0006] (3) The experimental test temperature and pressure conditions cannot meet the actual gas injection requirements of the oil field;
[0007] (4) The determination method of molecular diffusion coefficient based on concentration test established by Juarez et al. is only applicable to single-component gas-liquid system in
[0008] Molecular diffusion in the sand-packing model cannot determine the molecular diffusion coefficient of multi-component hydrocarbon systems in real oil and gas reservoirs

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 determining molecular diffusion coefficient of multi-component gas-liquid system in rock core
  • Device and method for determining molecular diffusion coefficient of multi-component gas-liquid system in rock core
  • Device and method for determining molecular diffusion coefficient of multi-component gas-liquid system in rock core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0028] see figure 1 .

[0029] The device for measuring the molecular diffusion coefficient of the multi-component gas-liquid system in the rock mainly consists of an inlet pump 1, a confining pressure pump 12, a back pressure pump 16, an intermediate container, a core holder 11, an oil-gas two-phase separator 17, and a pressure sensor 13. Computer 14, characterized in that the intermediate container includes a gas sample intermediate container 8, an oil sample intermediate container 9 and a formation water intermediate container 10, one end of the intermediate container is connected to the inlet pump 1, and the other end is connected to the core holder 11 , the core holder is connected to the back pressure pump 16 (through the back pressure valve 15), the confining pressure pump 12 and the oil-gas two-phase separator 17, the two ends of the core holder a...

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 relates to a device and method for determining a molecular diffusion coefficient of a multi-component gas-liquid system in a rock core. The device mainly comprises an inlet pump, a confining pressure pump, a pressure returning pump, an intermediate container, a rock core clamper, an oil-gas two-phase separator, a pressure sensor and a computer, wherein one end of the intermediate container is connected with the inlet pump; thee other end of the intermediate container is connected with the rock core clamper; the rock core clamper is connected with the pressure return pump, the confining pressure pump and the oil-gas two-phase separator; and two ends of the rock core clamper are connected with the pressure sensor and the computer. The method comprises the following steps of: transferring an oil sample and a gas sample into the rock core through the inlet pump; contacting an oil phase with a gas phase to generate diffusion and cause the reduction of the gas phase pressure; monitoring the pressure change of a gas phase zone; after the gas and liquid reach the balance, enabling the drained fluid in the rock core to enter the oil-gas two-phase separator; and analyzing and testing the gas phase composition and the property change. The device and method disclosed by the invention are reliable in principle and simple and convenient in operation; and the molecular diffusion coefficient of each component of the multi-component gas-liquid system in real rock core in the gas phase and oil phase can be determined under different temperature and pressure conditions of an oil reservoir and reasonable base data is provided for quantitatively evaluating the influence on the improvement on the recovery ratio caused by a molecular diffusion effect.

Description

technical field [0001] The patent of the present invention relates to the determination of the molecular diffusion coefficient of mass transfer between the gas-liquid phase, especially the device and method for determining the molecular diffusion coefficient of a multi-component oil-gas system in the actual rock core under high temperature and high pressure conditions in the petroleum industry. Background technique [0002] Gas injection to enhance oil recovery is an important technical means to enhance oil recovery at home and abroad. The injected gas and formation crude oil change the fluid properties of crude oil through interphase mass transfer and improve the flow capacity of crude oil. The experimental test of gas-oil phase equilibrium is the basic work of gas injection scheme design, which provides fluid high-pressure physical property parameters for gas injection numerical simulation; among them, the determination of molecular diffusion coefficient is an important par...

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): E21B49/00
Inventor 汪周华郭平杜建芬叶安平徐艳梅彭松蒙春
Owner SOUTHWEST PETROLEUM UNIV
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