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

Density measuring method for single-phase fluid under oil reservoir condition

A fluid density and density measurement technology, which is applied to determine the specific gravity and other directions by using the flow characteristics of the fluid, can solve the problems of long measurement time, achieve the effect of simple test method, rigorous test principle, and shorten the measurement time

Active Publication Date: 2013-10-16
PETROCHINA CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a single-phase fluid density measurement method under reservoir conditions to solve the problem that the existing measurement method needs to convert the high-temperature and high-pressure fluid into normal temperature and pressure, resulting in long measurement time

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
  • Density measuring method for single-phase fluid under oil reservoir condition
  • Density measuring method for single-phase fluid under oil reservoir condition
  • Density measuring method for single-phase fluid under oil reservoir condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0045] 1. method principle of the present invention

[0046] The density measurement of single-phase fluid under reservoir conditions adopts the double falling ball method, and its principle is as follows. For the force analysis of the ball falling vertically, see figure 1 , to obtain Equation 1, where τ is the viscous resistance of the tube wall when the ball falls.

[0047] G 1 -F 浮1 -τ 1 = m 1 a 1 (1)

[0048] G 2 -F 浮2 -τ 2 = m 2 a 2 (2)

[0049] τ = μA du dy

[0050] Such as figure 2 , take an annular zone on the ball, then the area dS=2π·(R-d)·r·dθ, the velocity gradient Then the viscous force τ can be integrated and calcul...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a density measuring method for a single-phase fluid under an oil reservoir condition and a density measuring instrument for the single-phase fluid under the oil reservoir condition. The density measuring method for the single-phase fluid under the oil reservoir condition at least comprises the following steps: A, placing two small balls with the same radius but different weights at an upper position and a lower position which are different in a measuring pipe; B, setting the temperature of the measuring pipe to be an oil reservoir temperature, and heating the measuring pipe until the temperature is stable; C, filling a selected fluid in the measuring pipe, and gradually pressurizing until the pressure in the measuring pipe reaches an oil reservoir pressure; D, filling an oil reservoir fluid in the measuring pipe, and synchronously discharging the selected fluid from the measuring pipe under a constant-pressure condition; and E, loosening a first small ball of the two small balls, measuring the time that the first small ball passes through a testing distance of the measuring pipe, loosening the second small ball of the two small balls after the oil reservoir fluid in the measuring pipe is stable, and measuring the time that the second small wall passes through the testing distance.

Description

technical field [0001] The invention belongs to the technical field of petroleum physical property measurement, and in particular relates to a single-phase fluid density measurement method and a density measurement instrument under oil reservoir conditions. Background technique [0002] In the measurement experiment of petroleum physical property parameters, fluid density is a basic parameter. Research has shown that methods and instruments for density measurement are diverse and suitable for different specialties. However, for the high-temperature and high-pressure environment of reservoirs, it is difficult for the existing methods and instruments to achieve the three aspects of test accuracy, high-temperature and high-pressure test conditions and easy operation. [0003] Generally, the basic method of mass-to-volume ratio is used to measure fluid density under reservoir conditions, and its measurement accuracy and test conditions meet the requirements of research analysis...

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): G01N9/34
Inventor 陈兴隆秦积舜李实张可
Owner PETROCHINA CO LTD
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