Carbonatite gas and water relative permeability determination method and device

A technology of relative permeability and carbonate rock, applied in the field of oilfield exploitation, can solve the problems of long measurement time, small flow rate, long time, etc.

Active Publication Date: 2015-06-24
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF4 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this analysis method is that it takes a long time and errors are prone to occur in the experimental process.
[0005] 1. The use of displacement experiments to measure the permeability of rock cores requires professional and technical personnel to interpret, and is highly dependent on the technical level and experience of the operators. The accuracy of the instrument will directly affect the quality of the displacement results; in actual work, due to the operator, Depending on the camera parameter settings, etc., the analysis results may be different;
[0006] 2. Long measurement time
Due to the poor connectivity and strong heterogeneity of carbonate rock, it takes a long time to do a set of displacement experiments. If there is an error, it needs to be re-measured. will cause test errors;
[0007] 3. During the displacement process, only some real-time data, time and flow can be recorded, and the displacement process cannot be observed dynamically in real time, and the real fluid flow law cannot be reflected
[0011] 1. During the mercury injection experiment, the mercury used is poisonous and will cause harm to the human body and the environment;
[0012] 2. The pore structure characteristics of the rock obtained by the mercury injection method is an average parameter, and the quantitative distribution characteristics of pore throats of different sizes cannot be obtained;
[0013] 3. During the mercury injection experiment, the mercury injection process will destroy the original pores and the clay minerals inside, which cannot reflect the real rock pore structure characteristics
[0014] 4. During the mercury injection experiment, only some real-time data can be recorded, and the displacement process cannot be observed dynamically in real time, and the real fluid flow law cannot be reflected

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
  • Carbonatite gas and water relative permeability determination method and device
  • Carbonatite gas and water relative permeability determination method and device
  • Carbonatite gas and water relative permeability determination method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0078] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0079] Aiming at the shortcomings of the current conventional and unconventional core flow simulation time and large error, in the technical solution provided in the embodiment of the present invention, through image processing technology, combined with program design, using CT scanning images, using carbonate rock CT Taking the scanning image as an example, by analyzing the core pore-throat distribution, the calculation scheme of carbonate rock permeability is deduced, and the relative permeability of gas and water is calculated, which provides a reliable method and t...

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 discloses a carbonatite gas and water relative permeability determination method and device. The method includes determining the distribution of pores of carbonatite; determining the gas phase and water phase flow velocities of the pores; determining the gas phase and water phase flow of the pores; according to the gas phase and water phase flow velocities and the gas phase and water phase flow of the pores, determining the carbonatite gas and water relative permeability. According to the method, manual intervention is omitted, water or mercury injection is omitted, and the defects of long time and large errors can be solved during carbonatite gas and water relative permeability determination.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a method and a device for determining the gas-water relative permeability of carbonate rocks. Background technique [0002] For the research on the development of pores, vugs and fractures in carbonate rock reservoirs, there are few research methods and knowledge on the microscopic flow of pores, vugs and fractures in carbonate rock reservoirs, and conventional displacement experiments, mercury injection It is difficult to obtain the relative permeability of the core accurately and quickly by means such as method. Next, the displacement experiment and the mercury porosimetry will be described. [0003] 1. One of the microscopic analysis techniques in the study of flow law: displacement experiment. [0004] The displacement experiment is to fill the core with saturated brine, then put it into the core holder, set the flow rate, measure the pressure at the inlet end...

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
Inventor 董平川蔡振忠邓兴梁于红枫张正红董睿涛杨书吴子森钟小葵黎丽丽
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products