CN211425741U - Fast mixed phase pressure measuring device - Google Patents

Abstract

The utility model discloses a rapid measurement device for mixed-phase pressure, which relates to the technical field of petroleum development and testing. , the sample tube is detachably installed in the autoclave, the two sides of the upper end of the autoclave are respectively provided with a drain port and an exhaust port, one side of the lower end of the autoclave is provided with a liquid drain port, and the bottom of the autoclave is provided with an air inlet port and the liquid inlet, the upper end of the sample tube is connected to the exhaust port through the first channel, the lower end of the sample tube is connected to the air inlet through the second channel, and the lower part of the sample tube is communicated with the liquid inlet and the liquid discharge port; the bubble tracking camera system includes a high temperature High-pressure observation window, high-temperature and high-pressure-resistant strip background light source and high-speed camera, the sample injection system includes an oil pump, and the oil pump is used to inject sample oil into the sample tube. The device is convenient for observation, high in measurement accuracy, short in measurement period, and improves test efficiency.

Description

Miscible pressure rapid measuring device

technical field

The utility model relates to the technical field of petroleum development tests, in particular to a rapid measuring device for mixed-phase pressure.

Background technique

Most of the existing devices for measuring the minimum miscible pressure are to pack sand of different diameters into the thin tube model, and use the injection system to inject crude oil into the thin tube model. conditions to determine the minimum miscible pressure. This measurement method has a great influence of human factors when filling the thin tube model. The density of each filling cannot be consistent. When the pressure value is measured, it is affected by the test accuracy of the pressure sensor transmitter, namely the acquisition module. It takes a long time manually to calculate the minimum miscible pressure in the later stage, and the calculation is complicated and the error rate is high. This kind of test device can no longer meet the economical, accurate and efficient experimental requirements in the simulation experiment.

Utility model content

In order to solve the above technical problems, the utility model provides a rapid measurement device for mixed-phase pressure, which is convenient for observation, high in measurement accuracy, short in measurement period, and improves test efficiency.

For achieving the above object, the utility model provides the following scheme:

The utility model provides a rapid measurement device for mixed-phase pressure, comprising a high temperature and high pressure bubble raising system, a bubble tracking camera system and a sample injection system. The high temperature and high pressure bubble raising system comprises an autoclave, a water pump, an air pump and a sample tube. The sample tube Removably installed in the autoclave, and the sample tube is arranged vertically, the upper end of the autoclave is provided with an emptying port and an exhaust port respectively, and one side of the lower end of the autoclave is provided with an exhaust port. A liquid port, the bottom of the autoclave is provided with an air inlet and a liquid inlet, the upper end of the sample tube is connected to the exhaust port through a first channel, and the lower end of the sample tube is connected to the air inlet through a second channel The lower part of the sample tube is connected to the liquid inlet and the liquid discharge port; the bubble tracking camera system includes a high temperature and high pressure observation window, a high temperature and high pressure strip background light source and a high-speed camera. The autoclave The high-temperature and high-pressure observation window is provided on one side, the strip-shaped background light source is installed in the autoclave, and the sample tube is arranged between the high-temperature and high-pressure observation window and the strip-shaped background light source. The high-speed camera is arranged on one side of the high temperature and high pressure observation window; the sample injection system includes an oil pump, and the oil pump is used for injecting sample oil into the sample tube.

Preferably, the autoclave comprises a kettle body with upper and lower openings, an upper plug and a lower plug, and the upper plug and the lower plug are respectively installed on the upper and lower ends of the kettle body.

Preferably, both ends of the strip-shaped background light source are respectively mounted on the upper plug and the lower plug.

Preferably, the emptying port is arranged on the upper side of the kettle body, the liquid draining port is arranged on the lower side of the kettle body, the exhaust port is arranged on the upper plug, and the first A channel is arranged in the upper plug, and the liquid inlet and the air inlet are arranged on the lower plug.

Preferably, the high temperature and high pressure bubble raising system further comprises a limit ring and a plurality of pull rods, the upper end of the pull rod is threadedly connected with the bottom of the upper plug, the lower end of the pull rod is fixedly connected with the limit ring, and the sample The lower end of the tube is fixedly connected with the limiting ring, and the upper end of the sample tube is sleeved with an O-ring to form a sealing connection with the upper plug.

Preferably, the lower end of the tie rod is locked on the limiting ring by a nut.

Preferably, there are four tie rods.

Preferably, the pull rod is a stainless steel pull rod.

The utility model has achieved the following technical effects with respect to the prior art:

The device for rapid measurement of mixed-phase pressure provided by the utility model includes a high temperature and high pressure bubble raising system, a bubble tracking camera system and a sample injection system. In the autoclave, the sample tube can be flexibly replaced according to the quality of the test sample to meet different sample testing needs. The bubble tracking camera system includes a high-temperature and high-pressure observation window, a high-temperature and high-pressure strip background light source and a high-speed camera. During the test, the shape and number of bubbles in the sample tube and the evolution and defoaming process of the bubble size are processed by the high-speed camera. Then, the minimum mixed-phase pressure is measured, the observation is convenient, the measurement accuracy is high, the measurement period is short, and the test efficiency is improved. The light source intensity of the high temperature and high pressure resistant strip background light source installed in the autoclave is adjustable, which is convenient for installation and maintenance. The rapid measurement device for miscible pressure in the utility model realizes that researchers can obtain the required experimental data economically, accurately and efficiently under the simulated high temperature and high pressure formation conditions, which is the basis for oil exploration in oilfield test institutes, research institutes and relevant petroleum colleges and universities. Provide guidance.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a device for rapid determination of mixed-phase pressure provided by the present invention.

Description of reference numerals: 1. Kettle body; 2. Upper plug; 3. Lower plug; 4. Sample tube; 5. Strip background light source; 6. High temperature and high pressure observation window; 7. High-speed camera; port; 9, exhaust port; 10, first channel; 11, liquid discharge port; 12, liquid inlet; 13, air inlet; 14, second channel; 15, tie rod; 16, limit ring; 17, nut.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The purpose of the utility model is to provide a rapid measurement device for mixed-phase pressure, which is convenient for observation, high in measurement accuracy, short in measurement period and improves test efficiency.

In order to make the above objects, features and advantages of the present utility model more clearly understood, the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , this embodiment provides a rapid measurement device for mixed-phase pressure, including a high temperature and high pressure bubble raising system, a bubble tracking camera system and a sample injection system, and the high temperature and high pressure bubble raising system includes an autoclave, a water pump, an air pump and a sample tube 4 , the sample tube 4 is detachably installed in the autoclave, and the sample tube 4 is arranged vertically. The sample tube 4 can be flexibly replaced according to the quality of the test sample to meet different sample testing requirements. The two sides of the upper end of the autoclave are respectively provided with an emptying port 8 and an exhaust port 9, which are mainly used for pre-filling distilled water samples in the annular space of the autoclave and the sample tube 4 to facilitate air discharge; one side of the lower end of the autoclave is provided with a The liquid discharge port 11, the bottom of the autoclave is provided with an air inlet 13 and a liquid inlet 12, the upper end of the sample tube 4 is connected to the exhaust port 9 through the first channel 10, and the lower end of the sample tube 4 is connected to the air inlet through the second channel 14. 13 is connected, the lower part of the sample tube 4 is communicated with the liquid inlet 12 and the liquid discharge port 11, the water pump is used to inject distilled water into the autoclave through the liquid inlet 12, and the air pump is used to inject gas into the sample tube 4 through the air inlet 13; The bubble tracking camera system includes a high temperature and high pressure observation window 6, a high temperature and high pressure strip-shaped background light source 5 and a high-speed camera 7. A high temperature and high pressure observation window 6 is provided on one side of the autoclave, and a strip-shaped background light source 5 is installed in the autoclave. The light source intensity of the background light source 5 is adjustable, which is convenient for installation and maintenance. Specifically, the strip-shaped background light source 5 is a strip-shaped background soft white light source; the sample tube 4 is arranged between the high-temperature and high-pressure observation window 6 and the strip-shaped background light source 5. The camera 7 is arranged on the side of the high temperature and high pressure observation window 6 . The sample injection system includes an oil pump, and the oil pump is used to inject sample oil into the sample tube 4 through the exhaust port 9 .

Specifically, the autoclave includes a kettle body 1 with upper and lower openings, an upper plug 2 and a lower plug 3 , and the upper plug 2 and the lower plug 3 are respectively installed on the upper and lower ends of the kettle body 1 . Two ends of the strip-shaped background light source 5 are respectively mounted on the upper plug 2 and the lower plug 3 .

The emptying port 8 is arranged on the upper side of the kettle body 1, the liquid discharge port 11 is arranged on the lower side of the kettle body 1, the exhaust port 9 is arranged on the upper plug 2, and the first channel 10 is arranged in the upper plug 2, The upper end of the first channel 10 is communicated with the exhaust port 9 , the lower end of the first channel 10 is communicated with the sample tube 4 , and the liquid inlet 12 and the air inlet 13 are arranged on the lower plug 3 .

Specifically, the high temperature and high pressure bubble raising system also includes a limit ring 16 and a plurality of tie rods 15. The upper end of the tie rod 15 is threadedly connected to the bottom of the upper plug 2, the lower end of the tie rod 15 is fixedly connected to the limit ring 16, and the lower end of the sample tube 4 is connected to the limiter The ring 16 is fixedly connected, and an O-ring is sleeved outside the upper end of the sample tube 4 to form a sealing connection with the upper plug 2 . In this specific embodiment, the lower end of the pull rod 15 is locked on the limiting ring 16 by the nut 17 .

In this specific embodiment, four pull rods 15 are provided, and the pull rods 15 are stainless steel pull rods.

The specific use process is as follows: the formation oil sample preparation system is prepared according to the required samples in the early stage of the experiment. First, the liquid discharge port 11 is closed, and the water pump injects clean distilled water into the annular space of the kettle body 1 through the liquid inlet port 12. The gas port 9 injects the prepared sample oil into the sample tube 4 until there is only distilled water near the injection needle at the inner bottom of the kettle body 1, and the sample oil does not overflow out of the sample tube 4, and then continue to inject distilled water to the required amount. After reaching the required pressure value, the air pump injects a small amount of gas with the required pressure value from the air inlet 13 at the bottom of the kettle body 1, and the gas enters the sample tube 4 to form bubbles. At the interface, when the bubbles enter the oil column, the bubble tracking camera system starts to work, recording the shape, number and evolution of the bubble size and the defoaming process, etc. Because the bubble tracking camera system includes a high temperature and high pressure resistant strip background soft white light source And the high-speed camera 7 is a high-performance component, which ensures that the shape and movement of the bubble can be accurately obtained. It can be seen that the shape and quantity of the bubbles in the sample tube 4 and the evolution and defoaming process of the bubble size can be accurately puzzled by the high-speed camera 7, and then the minimum miscible pressure can be measured according to the shape of the bubbles, which is convenient for observation and high in measurement accuracy. , the measurement cycle is short, and the test efficiency is improved. After the test is completed, the liquid in the kettle body 1 is discharged by opening the liquid discharge port 11 .

It can be seen from this that the device for rapid measurement of miscible pressure in this embodiment enables researchers to obtain the required experimental data economically, accurately and efficiently under the simulated high temperature and high pressure formation conditions, which is a useful tool for oilfield testing institutes, research institutes and related petroleum Provide a guiding basis for oil exploration in colleges and universities.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for those of ordinary skill in the art, According to the idea of the present invention, there will be changes in the specific implementation and application scope. In conclusion, the content of this specification should not be construed as a limitation on the present invention.

Claims (8)

1. A mixed phase pressure rapid measuring device is characterized by comprising a high-temperature high-pressure bubble raising system, a bubble tracking and shooting system and a sample injection system, wherein the high-temperature high-pressure bubble raising system comprises an autoclave, a water pump, an air pump and a sample tube, the sample tube is detachably mounted in the autoclave, the sample tube is vertically arranged, an evacuation port and an exhaust port are respectively arranged on two sides of the upper end of the autoclave, a liquid discharge port is arranged on one side of the lower end of the autoclave, an air inlet and a liquid inlet are arranged at the bottom of the autoclave, the upper end of the sample tube is connected with the exhaust port through a first channel, the lower end of the sample tube is connected with the air inlet through a second channel, and the lower part of the sample tube is communicated with the liquid inlet; the bubble tracking camera system comprises a high-temperature high-pressure observation window, a high-temperature high-pressure resistant strip-shaped background light source and a high-speed camera, wherein the high-temperature high-pressure observation window is arranged on one side of the high-pressure kettle, the strip-shaped background light source is arranged in the high-pressure kettle, the sample tube is arranged between the high-temperature high-pressure observation window and the strip-shaped background light source, and the high-speed camera is arranged on one side of the high-temperature high-pressure observation; the sample injection system includes an oil pump for injecting sample oil into the sample tube.

2. The miscible pressure rapid measuring device according to claim 1, wherein the autoclave comprises an upper and lower open autoclave body, an upper plug and a lower plug, and the upper plug and the lower plug are respectively installed at the upper end and the lower end of the autoclave body.

3. The miscible pressure rapid measuring device according to claim 2, wherein two ends of the strip-shaped background light source are respectively installed on the upper plug and the lower plug.

4. The apparatus according to claim 2, wherein the evacuation port is disposed on one side of an upper portion of the vessel, the liquid discharge port is disposed on one side of a lower portion of the vessel, the gas discharge port is disposed on the upper plug, the first channel is disposed in the upper plug, and the liquid inlet and the gas inlet are disposed on the lower plug.

5. The apparatus according to claim 2, wherein the high-temperature and high-pressure bubble rising system further comprises a limiting ring and a plurality of pull rods, the upper end of each pull rod is in threaded connection with the bottom of the upper plug, the lower end of each pull rod is fixedly connected with the limiting ring, the lower end of the sample tube is fixedly connected with the limiting ring, and an O-ring is sleeved outside the upper end of the sample tube and is in sealing connection with the upper plug.

6. The apparatus for rapidly measuring miscible pressure according to claim 5, wherein the lower end of the pull rod is locked to the limit ring by a nut.

7. The apparatus for rapidly measuring the miscible pressure according to claim 5, wherein the number of the tie rods is four.

8. The apparatus for rapidly measuring miscible pressure according to claim 5, wherein the tie rod is a stainless steel tie rod.

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