CN108318430A - A kind of bubble point pressure test system and method - Google Patents
A kind of bubble point pressure test system and method Download PDFInfo
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- CN108318430A CN108318430A CN201711365217.2A CN201711365217A CN108318430A CN 108318430 A CN108318430 A CN 108318430A CN 201711365217 A CN201711365217 A CN 201711365217A CN 108318430 A CN108318430 A CN 108318430A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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Abstract
The embodiment of the present application discloses a kind of bubble point pressure test system and method.The bubble point pressure tests system：The first port of container, container is connect by pipeline with injection pump and the second port of container is connect by pipeline with pressure-detecting device；Injection pump for injecting test fluid to container, and adjusts the pressure in container；Laser beam emitting device, for the test fluid emission laser into container；Laser signal is converted to electric signal, and electric signal is sent to data processing equipment by laser receiver for acquiring the laser signal through container；The pressure data detected is sent to data processing equipment by pressure-detecting device for the pressure in detection container；Data processing equipment determines bubble point pressure for receiving electric signal and pressure data according to electric signal and pressure data.Fluid bubble point pressure can be fast and accurately obtained, is overcome using the low disadvantage of bubble point pressure poor repeatability, accuracy when core test.
Description
Technical field
This application involves oil-gas field development experimental technique field, more particularly to a kind of bubble point pressure tests system and method.
Background technology
Formation oil physical data under high pressure is tested, such as bubble point pressure, dissolving oil-gas ratio, volume factor, the compressed coefficient and viscosity
Deng a series of reserves in relation to oil gas are calculated, reservoir numerical simulations are all indispensable important parameters.And bubble point pressure
It is particularly important in oil field development.Currently, Normal practice is to fill aqueous medium using high-pressure pump, it is then (porous toward rock core
Medium) in displacement another kind medium, usually formation fluid measures bubble point pressure according to the relationship of pressure volume.But due to rock
Interior portion duct is complicated, and progress displacement test speed is slow, while bubble point pressure poor repeatability, the accuracy tested are low, are not suitable for
In numerical simulation.Therefore, how fast and accurately to test bubble point pressure be in current oil-gas field development experimental technique field there is an urgent need for
It solves the problems, such as.
Invention content
The purpose of the embodiment of the present application is to provide a kind of bubble point pressure test system and method, to obtain accurately bubble
Point pressure shortens the experiment test time, meets the needs of engineers and technicians require to be quickly obtained the parameter in time.
In order to solve the above technical problems, a kind of bubble point pressure test system and method for the embodiment of the present application offer is such reality
Existing：
A kind of bubble point pressure test system, the bubble point pressure test system include：Injection pump, container, Laser emission dress
It sets, laser receiver, pressure-detecting device and data processing equipment；
The first port of the container is connect by pipeline with the injection pump；The second port of the container passes through pipeline
It is connect with the pressure-detecting device；
The injection pump for injecting test fluid to the container by the first port, and adjusts the container
Interior pressure；
Side, the test fluid emission being used for into the container swash on the container for the laser beam emitting device setting
Light；
The laser receiver is arranged below the container, will for acquiring the laser signal through the container
The laser signal is converted to electric signal, and the electric signal is sent to the data processing equipment；
The pressure-detecting device is used to detect the pressure in the container by the second port, and will detect
Pressure data is sent to the data processing equipment；
The data processing equipment is used to receive the electric signal and the pressure data, and according to the electric signal and institute
It states pressure data and determines bubble point pressure.
In preferred embodiment, some materials or all material of the container are transparent material.
In preferred embodiment, the transparent material includes quartz material.
In preferred embodiment, the laser receiver includes that signal receives main part, photoelectric signal transformation main part and signal hair
Send main part；
The signal acquisition main part is used to acquire the laser signal through the container；
The photoelectric signal transformation main part is used to the laser signal being converted to corresponding electric signal；
The signal sends main part and is connect with the data processing equipment, for the electric signal to be sent to the data
Processing unit.
In preferred embodiment, the data processing equipment is adopted with the laser receiver, the pressure-detecting device respectively
It is connected with wired data transfer mode or wireless transmission method.
A kind of bubble point pressure test method, including：
By injection pump test fluid is injected to container so that the pressure in the container is in the first specified pressure, and
The pressure in the container is reduced to second specified pressure from first specified pressure by injection pump；Wherein, institute
It states the first specified pressure and is more than bubble point pressure；The second pressure is less than bubble point pressure；
During pressure reduction in the container, pass through test fluid hair of the laser beam emitting device into the container
Laser is penetrated, and the laser signal through the container and the test fluid is acquired by laser receiver, by the laser
Signal is converted to electric signal, and the electric signal is sent to the data processing equipment, and is examined by pressure-detecting device
The pressure in the container is surveyed, and the pressure data detected is sent to the data processing equipment；
By the data processing equipment, bubble point pressure is determined according to the electric signal and the pressure data.
It is described that bubble point pressure is determined according to the electric signal and the pressure data in preferred embodiment, including：
According to the electric signal and the pressure data, the relation curve of pressure and electric signal is established；
Using the pressure and the corner position pressure of the relation curve of electric signal as bubble point pressure.
In preferred embodiment, described according to the electric signal and the pressure data, the relationship for establishing pressure and electric signal is bent
Line, including：
Using corresponding electric signal of same acquisition time and pressure as a data point, and using linear fit
Method multiple data points corresponding to multiple acquisition times are fitted processing, and the relationship for obtaining the pressure and electric signal is bent
Line.
In preferred embodiment, the pressure in the container is reduced to the described second specified pressure from first specified pressure
Power, including：
Rate is reduced according to preset pressure, the pressure in the container is reduced to institute step by step from first specified pressure
State the second specified pressure.
In preferred embodiment, first specified pressure is more than the strata pressure of the test fluid.
The embodiment of the present application can inject test fluid by injection pump to container so that the pressure in the container is in
First specified pressure, and it is reduced to described second to refer to from first specified pressure pressure in the container by injection pump
Constant-pressure；Then during pressure reduction in the container, pass through test stream of the laser beam emitting device into the container
Body emits laser, and acquires the laser signal through the container and the test fluid by laser receiver, will be described
Laser signal is converted to electric signal, and the electric signal is sent to the data processing equipment, and is filled by pressure detecting
The pressure detected in the container is set, and the pressure data detected is sent to the data processing equipment, obtains the electricity
The variation relation data of signal and the pressure data；Finally by the variation relation number of the electric signal and the pressure data
According to acquisition bubble point pressure.The bubble point pressure test method of the embodiment of the present application can the electric signal and the pressure data change
Change relation data, can fast and accurately obtain fluid bubble point pressure, overcomes using bubble point pressure repeatability when core test
The low disadvantage of difference, accuracy.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of the application bubble point pressure test system embodiment；
Fig. 2 is a kind of flow chart of bubble point pressure test method of the application；
Fig. 3 is that bubble point pressure determines curve graph in the embodiment of the present application.
Specific implementation mode
The embodiment of the present application provides a kind of bubble point pressure test system and method.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without creative efforts should all belong to the application protection
Range.
Fig. 1 is the structural schematic diagram of the application bubble point pressure test system embodiment.As shown in Figure 1, the bubble point pressure
Test system may include：Container 1, laser beam emitting device 2, laser receiver 3, injection pump 4,5 sum number of pressure-detecting device
According to processing unit 6.The first port of the container 1 is connect by pipeline with the injection pump 4.The second port of the container 1
It is connect with the pressure-detecting device 5 by pipeline.The injection pump 4 can be used for through the first port to the appearance
The injection test fluid of device 1, and adjust the pressure in the container 1.The laser beam emitting device 2 is arranged above the container 1,
It can be used for the test fluid emission laser into the container 1.The laser receiver 3 is arranged below the container 1,
It can be used for acquiring the laser signal through the container 1, the laser signal be converted into electric signal, and by the electric signal
It is sent to the data processing equipment 6.The pressure-detecting device 5 can be used for detecting the container by the second port
Pressure in 1, and the pressure data detected is sent to the data processing equipment 6.The data processing equipment 6 is for connecing
The electric signal and the pressure data are received, and bubble point pressure is determined according to the electric signal and the pressure data.
Bubble point pressure refers to gradually reducing system pressure under constant temperature, when liquid mixture begins to boil off appearance first
Pressure when a bubble.When formation pressure is less than bubble point pressure, natural gas is precipitated, and to lead to phase transformation, i.e., is turned by liquid phase
Become liquid, gas two-phase, and then the optical signal received can be caused to change.In the present embodiment, injection pump 4 can be passed through
Test fluid is injected to container 1 so that the pressure in the container 1 is in the first specified pressure, and will be described by injection pump 4
Pressure in container is reduced to second specified pressure from first specified pressure.Wherein, first specified pressure is big
In bubble point pressure, second specified pressure is less than bubble point pressure.Then during pressure reduction in the container 1, lead to
Test fluid emission laser of the laser beam emitting device 2 into the container 1 is crossed, and is adopted by the laser receiver 3
The laser signal is converted to electric signal by collection through the laser signal of the container 1 and the test fluid, and by the electricity
Signal is sent to the data processing equipment 6, and detects the pressure in the container 1 by pressure-detecting device 5, and will inspection
The pressure data measured is sent to the data processing equipment 6, obtains the variation relation of the electric signal and the pressure data
Data；Bubble point pressure is obtained finally by the variation relation data of the electric signal and the pressure data.In this way, the application is real
Fluid bubble point pressure can fast and accurately be obtained by applying example, be overcome using bubble point pressure poor repeatability when core test, accurate
The low disadvantage of property.
In the present embodiment, some materials of the container 1 or all material are transparent material.For the container 1
Some materials be transparent material the case where, specifically, for example, the material of the top and bottom part of the container 1 is
The material of bright material, other parts is translucent or opaque material, in this way, the Laser emission above the container 1 is arranged
The laser that device 2 emits can penetrate the container 1, and the laser signal penetrated can be adopted by the laser receiver 3
Collection.
In the present embodiment, the transparent material may include quartz material, pmma material etc..In practical application
In, can preferably quartz material as the transparent material, compression strength is higher, is suitable for the pressure of conventional bubble point pressure test
Range.
In the present embodiment, the laser receiver 3 can specifically include signal and receive main part, photoelectric signal transformation
Main part and signal send main part.Wherein, the signal acquisition main part can be used for acquiring the laser signal through the container 1.
The photoelectric signal transformation main part can be used for the laser signal being converted to corresponding electric signal.The signal sends main part
It is connect with the data processing equipment 6, can be used for the electric signal being sent to the data processing equipment 6.
In the present embodiment, the data processing equipment 6 can respectively with the laser receiver 3, the pressure
Detection device 6 is connected using wired data transfer mode or wireless transmission method.For example, wireless transmission method can specifically wrap
It includes：Wifi, bluetooth, Zigbee, GPRS etc..
Fig. 2 is a kind of flow chart of bubble point pressure test method of the application.As shown in Fig. 2, the bubble point pressure test side
Method includes the following steps.
Step S101：Test fluid is injected to container so that the pressure in the container is in first and refers to by injection pump
Constant-pressure, and the pressure in the container is reduced to by the described second specified pressure from first specified pressure by injection pump
Power；Wherein, first specified pressure is more than bubble point pressure；The second pressure is less than bubble point pressure.
In the present embodiment, test fluid can be injected to container by injection pump so that the pressure in the container
In the first specified pressure.Wherein, first specified pressure is more than bubble point pressure.Specifically, first specified pressure can
With the strata pressure more than the test fluid.
In the present embodiment, it is reduced to described second to specify from first specified pressure pressure in the container
Pressure can specifically include, and can reduce rate according to preset pressure, and the pressure in the container is specified pressure from described first
Power is reduced to second specified pressure step by step.Wherein, the second pressure is less than bubble point pressure.Specifically, the default pressure
The value range that power reduces rate can be 0.2MPa/min~0.6MPa/min.
In the present embodiment, the injection rate that the test fluid in the container can be adjusted by injection pump, adjusts institute
State the pressure in container.Specifically, it is possible to reduce the injection rate of the test fluid in the container, so as to reduce the appearance
Pressure in device.
Step S102：During pressure reduction in the container, by laser beam emitting device into the container
Fluid emission laser is tested, and the laser signal through the container and the test fluid is acquired by laser receiver,
The laser signal is converted into electric signal, and the electric signal is sent to the data processing equipment, and passes through pressure
Detection device detects the pressure in the container, and the pressure data detected is sent to the data processing equipment.
It in the present embodiment, can be by laser beam emitting device to institute during pressure reduction in the container
The test fluid emission laser in container is stated, and can be acquired by laser receiver and be flowed through the container and the test
The laser signal can be converted to electric signal, and can the electric signal be sent to the data by the laser signal of body
Processing unit, and the pressure in the container can be detected by pressure-detecting device, and can will be detected number pressure
According to being sent to the data processing equipment.
In the present embodiment, the data processing can be established by wired data transfer mode or wireless transmission method
The device connection with the laser receiver, the pressure-detecting device respectively.
Step S103：By the data processing equipment, bubble point pressure is determined according to the electric signal and the pressure data
Power.
In the present embodiment, bubble point pressure is determined according to the electric signal and the pressure data, can specifically include,
According to the electric signal and the pressure data, the relation curve of pressure and electric signal can be established.Can by the pressure with
The corner position pressure of the relation curve of electric signal is as bubble point pressure.
In the present embodiment, according to the electric signal and the pressure data, the relationship for establishing pressure and electric signal is bent
Line can specifically include, can be using corresponding electric signal of same acquisition time and pressure as a data point, and can
To be fitted processing using method multiple data points corresponding to multiple acquisition times of linear fit, the pressure is obtained
With the relation curve of electric signal.
For example, Fig. 3 is that bubble point pressure determines curve graph in the embodiment of the present application.Abscissa in Fig. 3 and ordinate difference
For pressure and electric signal.Wherein, the unit of pressure is MPa.As shown in figure 3, the relation curve of pressure and electric signal can be drawn,
Linear fit is carried out to the data point in inflection point neighbouring position both sides respectively, obtains linear intersection point, and linear intersection point is corresponding
Pressure 6.53MPa is as bubble point pressure.In order to verify the accuracy of the embodiment of the present application test result, flowed for identical test
Body is detected test fluid using traditional PVT methods, and the bubble point pressure measured is 6.58MPa.It can be seen that using
The bubble point pressure accuracy of the method test of the embodiment of the present application is higher.
To sum up, bubble point pressure provided by the embodiments of the present application tests system and method, is a kind of to utilize photosignal
The system and method for bubble point pressure test is carried out with the relationship of pressure, can be injected test fluid to container by injection pump, be made
It obtains the pressure in the container and is in the first specified pressure, and referred to the pressure in the container from described first by injection pump
Constant-pressure is reduced to second specified pressure；Then it during pressure reduction in the container, is filled by Laser emission
The test fluid emission laser into the container is set, and is acquired by laser receiver and penetrates the container and the test
The laser signal is converted to electric signal, and the electric signal is sent to the data processing and is filled by the laser signal of fluid
It sets, and the pressure in the container is detected by pressure-detecting device, and the pressure data detected is sent to the number
According to processing unit, the variation relation data of the electric signal and the pressure data are obtained；Finally by the electric signal and institute
The variation relation data for stating pressure data obtain bubble point pressure.The bubble point pressure test method of the embodiment of the present application can the electricity
The variation relation data of signal and the pressure data can fast and accurately obtain fluid bubble point pressure, overcome using rock
Bubble point pressure poor repeatability, accuracy low disadvantage when the heart is tested.In this way, using the system and method for the application can obtain compared with
For accurate bubble point pressure, shorten the experiment test time, meets engineers and technicians in time and require the need for being quickly obtained the parameter
It asks.
In the 1990s, the improvement of a technology can be distinguished clearly be on hardware improvement (for example,
Improvement to circuit structures such as diode, transistor, switches) or software on improvement (improvement for method flow).So
And with the development of technology, the improvement of current many method flows can be considered as directly improving for hardware circuit.
Designer nearly all obtains corresponding hardware circuit by the way that improved method flow to be programmed into hardware circuit.Cause
This, it cannot be said that the improvement of a method flow cannot be realized with hardware entities module.For example, programmable logic device
(Programmable Logic Device, PLD) (such as field programmable gate array (Field Programmable Gate
Array, FPGA)) it is exactly such a integrated circuit, logic function determines device programming by user.By designer
Voluntarily programming comes a digital display circuit " integrated " on a piece of PLD, designs and makes without asking chip maker
Dedicated IC chip.Moreover, nowadays, substitution manually makes IC chip, this programming is also used instead mostly " patrols
Volume compiler (logic compiler) " software realizes that software compiler used is similar when it writes with program development,
And the source code before compiling also write by handy specific programming language, this is referred to as hardware description language
(Hardware Description Language, HDL), and HDL is also not only a kind of, but there are many kind, such as ABEL
(Advanced Boolean Expression Language)、AHDL(Altera Hardware Description
Language)、Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL
(Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby
Hardware Description Language) etc., VHDL (Very-High-Speed are most generally used at present
Integrated Circuit Hardware Description Language) and Verilog2.Those skilled in the art
It will be apparent to the skilled artisan that only needing method flow slightly programming in logic and being programmed into integrated circuit with above-mentioned several hardware description languages
In, so that it may to be readily available the hardware circuit for realizing the logical method flow.
It is also known in the art that other than realizing controller in a manner of pure computer readable program code, it is complete
Entirely can by by method and step carry out programming in logic come so that controller with logic gate, switch, application-specific integrated circuit, programmable
The form of logic controller and embedded microcontroller etc. realizes identical function.Therefore this controller is considered one kind
Hardware component, and the structure that the device for realizing various functions for including in it can also be considered as in hardware component.Or
Even, can will be considered as realizing the device of various functions either the software module of implementation method can be Hardware Subdivision again
Structure in part.
System, device or the module that above-described embodiment illustrates can specifically be realized, Huo Zheyou by computer chip or entity
Product with certain function is realized.
For convenience of description, it is divided into various modules when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each module is realized can in the same or multiple software and or hardware when application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be expressed in the form of software products, in a typical configuration
In, computing device includes one or more processors (CPU), input/output interface, network interface and memory.The computer is soft
Part product may include that some instructions are used so that a computer equipment (can be personal computer, server or network
Equipment etc.) execute method described in certain parts of each embodiment of the application or embodiment.The computer software product can
To store in memory, memory may include the volatile memory in computer-readable medium, random access memory
(RAM) and/or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer
The example of readable medium.Computer-readable medium includes that permanent and non-permanent, removable and non-removable media can be by
Any method or technique realizes information storage.Information can be computer-readable instruction, data structure, the module of program or its
His data.The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM
(SRAM), dynamic random access memory (DRAM), other kinds of random access memory (RAM), read-only memory
(ROM), electrically erasable programmable read-only memory (EEPROM), fast flash memory bank or other memory techniques, CD-ROM are read-only
Memory (CD-ROM), digital versatile disc (DVD) or other optical storages, magnetic tape cassette, tape magnetic disk storage or
Other magnetic storage apparatus or any other non-transmission medium can be used for storage and can be accessed by a computing device information.According to
Herein defines, and computer-readable medium does not include of short duration computer readable media (transitory media), such as modulation
Data-signal and carrier wave.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method
Part explanation.
The application can be used in numerous general or special purpose computing system environments or configuration.Such as：Personal computer, clothes
Business device computer, handheld device or portable device, laptop device, multicomputer system, microprocessor-based system, set
Top box, programmable consumer-elcetronics devices, network PC, minicomputer, mainframe computer including any of the above system or equipment
Distributed computing environment etc..
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Usually, program module includes routines performing specific tasks or implementing specific abstract data types, program, object, group
Part, data structure etc..The application can also be put into practice in a distributed computing environment, in these distributed computing environments, by
Task is executed by the connected remote processing devices of communication network.In a distributed computing environment, program module can be with
In the local and remote computer storage media including storage device.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (10)
1. a kind of bubble point pressure tests system, which is characterized in that the bubble point pressure tests system and includes：Injection pump, swashs at container
Light emitting devices, laser receiver, pressure-detecting device and data processing equipment；
The first port of the container is connect by pipeline with the injection pump；The second port of the container passes through pipeline and institute
State pressure-detecting device connection；
The injection pump for injecting test fluid to the container by the first port, and adjusts in the container
Pressure；
The laser beam emitting device setting is square on the container, for the test fluid emission laser into the container；
The laser receiver is arranged below the container, will be described for acquiring the laser signal through the container
Laser signal is converted to electric signal, and the electric signal is sent to the data processing equipment；
The pressure-detecting device is used to detect the pressure in the container, and the pressure that will be detected by the second port
Data are sent to the data processing equipment；
The data processing equipment is used to receive the electric signal and the pressure data, and according to the electric signal and the pressure
Force data determines bubble point pressure.
2. a kind of bubble point pressure according to claim 1 tests system, which is characterized in that some materials of the container or
All material is transparent material.
3. a kind of bubble point pressure according to claim 2 tests system, which is characterized in that the transparent material includes quartz
Material.
4. a kind of bubble point pressure according to claim 1 tests system, which is characterized in that the laser receiver includes
Signal receives main part, photoelectric signal transformation main part and signal and sends main part；
The signal acquisition main part is used to acquire the laser signal through the container；
The photoelectric signal transformation main part is used to the laser signal being converted to corresponding electric signal；
The signal sends main part and is connect with the data processing equipment, for the electric signal to be sent to the data processing
Device.
5. a kind of bubble point pressure according to claim 1 tests system, which is characterized in that the data processing equipment difference
It is connect using wired data transfer mode or wireless transmission method with the laser receiver, the pressure-detecting device.
6. a kind of bubble point pressure test method, which is characterized in that including：
Test fluid is injected to container so that the pressure in the container is in the first specified pressure, and passes through by injection pump
Pressure in the container is reduced to the second specified pressure by injection pump from first specified pressure；Wherein, described first refers to
Constant-pressure is more than bubble point pressure；Second specified pressure is less than bubble point pressure；
During pressure reduction in the container, swashed by test fluid emission of the laser beam emitting device into the container
Light, and the laser signal through the container and the test fluid is acquired by laser receiver, by the laser signal
Electric signal is converted to, and the electric signal is sent to data processing equipment, and the appearance is detected by pressure-detecting device
Pressure in device, and the pressure data detected is sent to the data processing equipment；
By the data processing equipment, bubble point pressure is determined according to the electric signal and the pressure data.
7. a kind of bubble point pressure test method according to claim 6, which is characterized in that it is described according to the electric signal and
The pressure data determines bubble point pressure, including：
According to the electric signal and the pressure data, the relation curve of pressure and electric signal is established；
Using the pressure and the corner position pressure of the relation curve of electric signal as bubble point pressure.
8. a kind of bubble point pressure test method according to claim 7, which is characterized in that it is described according to the electric signal and
The pressure data establishes the relation curve of pressure and electric signal, including：
Using corresponding electric signal of same acquisition time and pressure as a data point, and using the method for linear fit
Multiple data points corresponding to multiple acquisition times are fitted processing, obtain the relation curve of the pressure and electric signal.
9. a kind of bubble point pressure test method according to claim 6, which is characterized in that by the pressure in the container from
First specified pressure is reduced to second specified pressure, including：
Rate is reduced according to preset pressure, the pressure in the container is reduced to described the step by step from first specified pressure
Two specified pressures.
10. a kind of bubble point pressure test method according to claim 6, which is characterized in that first specified pressure is big
In the strata pressure of the test fluid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159261A (en) * | 2019-05-21 | 2019-08-23 | 中国石油大学(华东) | The device and method of bubble point pressure in a kind of measurement compact oil reservoir |
| CN111693676A (en) * | 2019-03-12 | 2020-09-22 | 中国石油化工股份有限公司 | System and method for measuring bubble point pressure of crude oil in porous medium |
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