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High-pressure multiphase fluid density measurement device and measurement and calculation method thereof

A multi-phase fluid and density measurement technology, which is used in the determination of specific gravity and material inspection products by using the flow characteristics of the fluid. simple method effect

Active Publication Date: 2014-11-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Apparently, measuring the density of two-phase fluids under reservoir conditions by conventional methods requires an additional step of two-phase separation, which is difficult to achieve under current experimental conditions
If it is necessary to obtain the density curve of the two-phase fluid under different temperature and pressure conditions, the measurement workload will be unbearable

Method used

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Embodiment approach 1

[0100] Such as Figure 1 to Figure 11As shown, the embodiment of the present invention proposes a high-pressure multiphase fluid density measuring device, which includes an inner model 1 and an outer model 2 , and the inner model 1 is set inside the outer model 2 . The inner model 1 includes an analysis cylinder 3 , a test ball 4 , an induction coil 5 and a scale 7 . The upper and lower parts of the analysis cylinder 3 are respectively provided with a top piston 3a and a bottom piston 3b, the top piston 3a is provided with a magnet hole 3a1 for placing an electromagnet, and the top piston 3a is axially provided with a fluid through hole 3a2, through which the fluid passes The hole 3a2 is used to inject or empty the fluid in the analysis cylinder 3. Here, the magnet hole 3a1 is arranged in the middle of the top piston 3a, and there are two fluid through holes 3a2, which are respectively located on both sides of the magnet hole 3a1; the bottom piston 3b It can be moved up and d...

Embodiment approach 2

[0120] The embodiment of the present invention proposes a method for measuring and calculating the density of two-phase fluids and the mass transfer content of components under reservoir conditions. The method includes the steps of:

[0121] (1) Provide the high-pressure multiphase fluid density measuring device in embodiment 1, and carry out experimental preparation, known parameter (such as known mass and volume m 球 , V 球 ) test ball into the analysis cylinder, and install the inner model 1 and the outer model 2;

[0122] (2) Prepare the gas under the pressure P1 and temperature T1 conditions of known mass; prepare the liquid under the same conditions with known volume; both are contained in specific containers;

[0123] (3) Put the outer model 2 under the above-mentioned conditions of pressure P1 and temperature T1, and evacuate the upper part of the analysis cylinder 3, so that the bottom piston 3b is in contact with the test ball 4 and the top piston 3a. The pressure of...

Embodiment approach 3

[0137]This embodiment is about the filling device in Embodiment 2, and its specific description is as follows:

[0138] Such as Figure 14 to Figure 17B As shown, the filling device proposed by the embodiment of the present invention includes a pressure-resistant container 8 and a pushing part 9 . The pressure-resistant container 8 is composed of a container cylinder 8a, a piston 8b, a hollow plug 8c and a valve 8d for controlling the fluid in and out of the container cylinder 8a. The container cylinder 8a is a space for containing gas, the valve 8d is located outside the container cylinder 8a, and is connected to one end of the container cylinder 8a, and the hollow plug 8c is connected to the other end of the container cylinder 8a. The piston 8b is movably and sealedly connected in the container barrel 8a, that is, the piston 8b realizes the function of gas in and out by moving back and forth, and can adjust the gas pressure of the container barrel 8a. The pushing member 9 ...

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Abstract

The invention discloses a high-pressure multiphase fluid density measurement device and a measurement and calculation method thereof. The measurement device comprises an inner model and an outer model, wherein the inner model is arranged in the outer model, the inner model comprises an analysis cylinder, a scale, a testing ball and an induction coil, a top piston and a bottom piston are respectively arranged on the upper part and lower part of the analysis cylinder, the top piston is internally provided with a magnet hole used for placing an electromagnet and axially provided with a fluid through hole, the bottom piston is arranged in the analysis cylinder and can move up and down, the top end and bottom end of the analysis cylinder are respectively and hermetically connected with an upper end cover and a lower end cover, the upper end cover is positioned above the top piston, the lower end cover is positioned below the bottom piston, the upper end cover is provided with a first liquid hole, the lower end cover is provided with a second liquid hole, the scale is arranged on one side of the analysis cylinder corresponding to the position of the induction coil, the testing ball consists of a ball outer wall and a permanent magnet core, the permanent magnet core is arranged in the ball outer wall, the testing ball is arranged in the analysis cylinder, and the induction coil is sheathed outside the analysis cylinder and can move up and down through a coil regulating part.

Description

technical field [0001] The invention relates to the field of petroleum physical property measurement, in particular to a high-pressure multiphase fluid density measurement device and a measurement and calculation method for two-phase fluid density and component mass transfer content under oil reservoir conditions. Background technique [0002] In the measurement experiment of petroleum physical property parameters, fluid density is a basic parameter. Research shows that there are various methods and instruments for density measurement, which are suitable for different specialties, but their limitations are only applicable to single-phase homogeneous fluids. Reservoirs are high-temperature and high-pressure environments, and the seepage fluid in rock pores is sometimes in a two-phase state. It is very important for technical research to master its physical properties. Among them, there is no research on the density change and measurement method of the two-phase fluid. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N9/34G01N33/28
Inventor 陈兴隆秦积舜李实俞宏伟张可
Owner PETROCHINA CO LTD
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