CN108918326B - A kind of high temperature and pressure rock core imbibition experimental provision and method - Google Patents
A kind of high temperature and pressure rock core imbibition experimental provision and method Download PDFInfo
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- CN108918326B CN108918326B CN201810598183.XA CN201810598183A CN108918326B CN 108918326 B CN108918326 B CN 108918326B CN 201810598183 A CN201810598183 A CN 201810598183A CN 108918326 B CN108918326 B CN 108918326B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
Abstract
The present invention relates to a kind of high temperature and pressure rock core imbibition experimental provision and methods, including imbibition test macro, pressure feed system and temperature control system；Rock core is hung in imbibition test macro, makes to simulate different high temperature and high pressure environments in imbibition test macro by pressure feed system and temperature control system, finally obtains imbibition experimental study of the rock core under different high temperature and high pressure environments.Rock core imbibition experimental provision of the present invention provides effective experimental facilities to carry out rock core imbibition experiment under high temperature and high pressure environment, can preferably simulate the high temperature of rock core under reservoir media, high pressure imbibition process using the experimental provision.Experimental method read test the cylinder piston top and the bottom pressure difference converts to obtain the real-time quality of testing rock core through the invention, entire experimental method is easy to operate, test result is accurate, provides accurate data for the rock core imbibition analysis of experimental results under high temperature and high pressure environment.
Description
Technical field
The present invention relates to a kind of high temperature and pressure rock core imbibition experimental provision and methods, belong to oil-gas field development imbibition oil recovery skill
Art field.
Background technique
The unconventional petroleum resources exploitation scale such as fine and close oil-gas reservoir is growing, and Technologies For High Efficient Development is current research
Hot technology.For such oil reservoir since reservoir is fine and close, matrix permeability is poor, conventional production technique effect adaptability is poor, same with this
When such reservoir pore throat is tiny, capillary force is strong, therefore acting through imbibition to carry out oil and water displacement using capillary force is such oil reservoir
Important mechanism and means.
The experimental study that imbibition is recovered the oil mostly is carried out using equipment such as glass imbibition bottles in atmospheric conditions at present, with reality
Oil reservoir high temperature and high pressure environment difference in border is larger, and experimental reliability is difficult to ensure.Furthermore by volumetric method to imbibition go out oil mass into
Row metering also due to oil pump capacity it is few vulnerable to crude oil in the wall built-up effects of wall surface of the container and precision is poor.In addition there are pass through matter
The experimental method that the oil mass that amount method goes out imbibition is measured, but relevant device realizes real-time continuous metering under high-temperature and high-pressure conditions
When, there are installations and facilities are complicated or the problems such as heat resisting and pressure resisting intensity is lower.It is therefore desirable to design, one kind is easy to operate, heatproof is resistance to
Reliable, accurate measurement high temperature and pressure rock core imbibition test device and its experimental method are pressed, to realize rock core reservoir condition lower die
Quasi- imbibition and its accurate metering.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of high temperature and pressure rock core imbibition experimental provision.
The present invention also provides a kind of experimental methods for carrying out rock core imbibition at high temperature under high pressure using above-mentioned experimental provision.
Technical scheme is as follows:
A kind of high temperature and pressure rock core imbibition experimental provision, including imbibition test macro, pressure feed system and temperature control
System；
Imbibition test macro includes imbibition room housing, testing rock core and test cylinder, and testing rock core and test cylinder are placed in imbibition
Interior, test cylinder include cylinder body and are located at the intracorporal piston of cylinder, and testing rock core is suspended on piston base, cylinder body and imbibition room shell
Body is connected by connecting pipeline；
Pressure feed system includes sequentially connected liquid storing barrel, constant flow pump, intermediate receptacle, and intermediate receptacle passes through feed flow pipeline
It is connected to imbibition room；
Temperature control system includes sequentially connected heating cable, temperature controller, temperature control galvanic couple and temperature control galvanic couple chamber, is added
Hot line cable is connect with the heating gate of imbibition room housing bottom, and temperature control galvanic couple chamber one end is inserted into imbibition room housing.
Preferably, the bottom of imbibition room housing offers leakage fluid dram.
Preferably, the top of imbibition room housing is equipped with first pressure gauge, and first pressure gauge passes through pressure-measuring pipe line and test cylinder
The first valve is installed on connection and pressure-measuring pipe line.
Preferably, the side of imbibition room housing is equipped with second pressure gauge, and second pressure gauge passes through pressure-measuring pipe line and imbibition room
The second valve is installed on connection and pressure-measuring pipe line.
Preferably, third valve is installed on the pipeline connected between constant flow pump and intermediate receptacle.
Preferably, a piston separator is equipped in intermediate receptacle, intermediate receptacle inner cavity is divided into two chambers up and down by piston separator
Room, upper chamber connect with imbibition room, and lower chambers are connect with constant flow pump.
Preferably, the 4th valve is installed on the connecting pipeline between cylinder body and imbibition room housing.
Preferably, pass through hook connection between testing rock core and piston.
A method of carrying out rock core imbibition experiment under high temperature and high pressure environment, using above-mentioned experimental provision, including with
Lower step:
(1) preparing experiment material: prepare multiple experiment core samples, test record core sample basic parameter, and press
The saturation of respective media is carried out to core sample according to experiment purpose；Different imbibition liquid is prepared according to requirement of experiment；
(2) it connects experimental provision: the core sample of step (1) being suspended on piston base, heating gate passes through heating cable
Temperature controller is connected, temperature controller is separately connected the heating gate and thermocouple of imbibition room housing, thermocouple one end insertion temperature
Control galvanic couple chamber；Constant current pump intake connects liquid storing barrel, outlet connection intermediate receptacle, and the upper chamber in intermediate receptacle is equipped with step (1)
The imbibition liquid of preparation is simultaneously connect with imbibition room；
(3) to imbibition room feed flow: imbibition liquid is pumped into imbibition room by constant flow pump, until imbibition liquid is full of imbibition room；
(4) experimental pressure, temperature are adjusted: being full of imbibition liquid in suction-chamber for seep and reaches termination of pumping after requirement of experiment pressure；If
Determine the temperature of requirement of experiment, quickly heat imbibition room and its interior imbibition liquid, closes the 4th valve；
(5) record experimentation: experiment starts, and reads showing for a first pressure gauge and second pressure gauge within each minute
Number is read once for every 10 minutes after one hour, is read within every 60 minutes after two hours primary；
(6) experiment terminates: after completing experiment according to requirement of experiment, closing experimental facilities, removal of core sample, finally clean
Experimental facilities waits for that next time, experiment used.
Preferably, further include step (7) analysis of experimental results processing: seeking core sample quality according to formula (I), and to reality
It tests result and carries out corresponding analysis
In formula: m- imbibition process core quality (g)；p1Test end pressure (Pa) under the cylinder piston；
p2Test end pressure (Pa) in the cylinder piston；Upper (lower) area of section (the cm of A- piston2)；
F- tests maximum static friction force (10 between the cylinder piston and cylinder body-3N)；G- acceleration of gravity (9.8m/s2)；
ρ-imbibition liquid density (g/cm3)；V- rock core, piston and the total apparent volume (cm of hook3)；
m1Piston and hook gross mass (g).
The beneficial effects of the present invention are:
Rock core imbibition experimental provision of the present invention provides effectively to carry out rock core imbibition experiment under high temperature and high pressure environment
Experimental facilities can preferably simulate the high temperature of rock core under reservoir media, high pressure imbibition process using the experimental provision.By this hair
Bright experimental method read test the cylinder piston top and the bottom pressure difference converts to obtain the real-time quality of testing rock core, entire experimental method
Easy to operate, test result is accurate, provides accurate number for the rock core imbibition analysis of experimental results under high temperature and high pressure environment
According to.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of rock core imbibition experimental provision of the present invention；
Wherein: 1, first pressure gauge；2, the first valve；3, imbibition room housing；4, second pressure gauge；5, the second valve；6,
Testing rock core；7, temperature control galvanic couple chamber；8, temperature control galvanic couple；9, temperature controller；10, heating cable；11, heating gate；12, bracket；
13, working solution；14, third valve；15, constant flow pump；16, imbibition liquid；17, intermediate receptacle；18, feed flow pipeline；19, the 4th valve
Door；20, connecting pipeline；21, rock core is linked up with；22, piston is linked up with；23, piston；24, cylinder body；25, pressure-measuring pipe line；26, leakage fluid dram；
27, liquid storing barrel.
Specific embodiment
The present invention will be further described by way of example and in conjunction with the accompanying drawings, but not limited to this.
Embodiment 1:
As shown in Figure 1, mainly including imbibition test the present embodiment provides a kind of high temperature and pressure rock core imbibition experimental provision
System, pressure feed system and temperature control system three parts, in which:
Imbibition test macro includes imbibition room housing 3, testing rock core 6 and test cylinder, and the cavity in imbibition room housing 3 is to seep
Suction-chamber, testing rock core 6 and test cylinder are placed in imbibition room, and test cylinder includes cylinder body 24 and is located at the intracorporal piston 23 of cylinder, are surveyed
Examination rock core 6 is suspended on 23 bottom of piston, and cylinder body 24 is connected with imbibition room housing 3 by connecting pipeline 20；
Pressure feed system includes sequentially connected liquid storing barrel 27, constant flow pump 15, intermediate receptacle 17, and intermediate receptacle 17 passes through
Feed flow pipeline 18 is connected to imbibition room；Working solution is housed in liquid storing barrel 27, has a piston separator to hold centre in intermediate receptacle 17
Device inner cavity is divided into two chambers, the outlet of constant flow pump 15 up and down and is connected to the lower chambers of intermediate receptacle 17, the epicoele of intermediate receptacle
Room is equipped with imbibition liquid.
Temperature control system includes sequentially connected heating cable 10, temperature controller 9, temperature control galvanic couple 8 and temperature control galvanic couple
Chamber 7, heating cable 10 are connect with the heating gate 11 of imbibition room housing bottom, and imbibition room housing 3 is built-in with heating coil, temperature control electricity
In even 7 one end of chamber insertion imbibition room housing 3, temperature control galvanic couple 8 is inserted into temperature control galvanic couple chamber 7.
The top of imbibition room housing 3 is equipped with first pressure gauge 1, and first pressure gauge 1 is connected by pressure-measuring pipe line 25 and test cylinder
It connects and the first valve 2 is installed on pressure-measuring pipe line.The side of imbibition room housing is equipped with second pressure gauge 4, and second pressure gauge 4 passes through
Pressure-measuring pipe line connect with imbibition room and is equipped with the second valve 5 on pressure-measuring pipe line.Connection between cylinder body 24 and imbibition room housing 3
4th valve 19 is installed on pipeline.
Third valve 14 is installed on the pipeline connected between constant flow pump 15 and intermediate receptacle 17.Liquid storing barrel 27 and constant flow pump
Valve is installed on the pipeline connected between 15.
In addition, 3 pier base of imbibition room housing is on a bracket 12, the bottom of imbibition room housing offers leakage fluid dram 26, later period
Waste liquid after the completion of experiment can be discharged.
The working principle of the set experimental provision: the oil of rock core imbibition is provided by pressure feed system and temperature control system
Temperature and pressure condition is hidden, oil and water displacement causes rock core gravity to change during rock core imbibition, this variation can pass through
Pressure difference reflects in real time above and below the test the cylinder piston being connected with rock core, to realize the reality of rock core imbibition process under reservoir condition
When, follow-on test.Test process injects imbibition liquid into imbibition room and reaches requirement of experiment pressure before starting by constant flow pump；It is logical
Excess temperature controller and its mating temperature control galvanic couple heat imbibition room to requirement of experiment temperature, and keep constant temperature；Test process closes
Imbibition room-test cylinder connection valve is closed, makes to test the cylinder piston upper and lower part as two independent pressure environments；Experimentation
In change with the quality of progresss testing rock core of imbibition effect, cause the pressure difference for testing the cylinder piston upper and lower part to be sent out
Changing can be obtained the pressure and its difference of test the cylinder piston upper and lower part by reading first pressure gauge and second pressure gauge,
To acquire the real-time quality of testing rock core by correlativity formula.
Embodiment 2:
High temperature and pressure rock core imbibition experimental provision as described in Example 1, the difference is that: testing rock core 6 and work
Pass through hook connection between plug.23 bottom end of piston connects piston hook 22, and 6 top of testing rock core connects rock core hook 21,
Rock core hook 21 and piston hook 22 link together, and can easily replace different testing rock cores in this way, facilitate progress
Different experiments.
Embodiment 3:
A method of carrying out rock core imbibition experiment under high temperature and high pressure environment, using experimental provision described in embodiment 1,
The following steps are included:
(1) preparing experiment material: preparing multiple experiments and use core sample spare, test record core sample basic parameter,
Basic parameter includes porosity, permeability, and (can establish beam according to the saturation that experiment purpose carries out respective media to core sample
Water is tied up, or only saturation simulation oil)；Preparing different imbibition liquid according to requirement of experiment, (it is water-soluble that different salinities can be selected in imbibition liquid
Liquid, surfactant solution, biological enzyme solutions)；
(2) it connects experimental provision: the core sample of step (1) being suspended on piston base, heating gate passes through heating cable
Temperature controller is connected, temperature controller is separately connected the heating gate and thermocouple of imbibition room housing, thermocouple one end insertion temperature
Control galvanic couple chamber；Constant current pump intake connects liquid storing barrel, outlet connection intermediate receptacle, and the upper piston area in intermediate receptacle is equipped with step
(1) prepare imbibition liquid and connect with imbibition room；
(3) to imbibition room feed flow: opening third valve, be pumped into imbibition liquid into imbibition room by constant flow pump；
(4) experimental pressure, temperature are adjusted: being full of imbibition liquid in suction-chamber for seep and reaches termination of pumping after requirement of experiment pressure；If
Determine the temperature of requirement of experiment, quickly heat imbibition room and its interior imbibition liquid, closes the 4th valve；
(5) record experimentation: experiment starts, and reads showing for a first pressure gauge and second pressure gauge within each minute
Number is read once for every 10 minutes after one hour, is read within every 60 minutes after two hours primary；
(6) experiment terminates: after completing experiment according to requirement of experiment, closing experimental facilities, removal of core sample, finally clean
Experimental facilities waits for that next time, experiment used.
(7) analysis of experimental results is handled: being sought core sample quality according to formula (I), and is accordingly divided experimental result
Analysis
In formula: m- imbibition process core quality (g)；p1Test end pressure (Pa) under the cylinder piston；
p2Test end pressure (Pa) in the cylinder piston；Upper (lower) area of section (the cm of A- piston2)；
F- tests maximum static friction force (10 between the cylinder piston and cylinder body-3N)；G- acceleration of gravity (9.8m/s2)；
ρ-imbibition liquid density (g/cm3)；V- rock core, piston and the total apparent volume (cm of hook3)；
m1Piston and hook gross mass (g).
By the above experimental method, the quality of testing rock core can be obtained in real time, and then can be simulated by correlation analysis different
The experimental study of rock core imbibition under high temperature and high pressure environment.
Claims (10)
1. a kind of high temperature and pressure rock core imbibition experimental provision, which is characterized in that including imbibition test macro, pressure feed system and
Temperature control system；
Imbibition test macro includes imbibition room housing, testing rock core and test cylinder, and testing rock core and test cylinder are placed in imbibition room,
Test cylinder includes cylinder body and is located at the intracorporal piston of cylinder, and testing rock core is suspended on piston base, and cylinder body and imbibition room housing are logical
Cross connecting pipeline connection；
Pressure feed system includes sequentially connected liquid storing barrel, constant flow pump, intermediate receptacle, and intermediate receptacle is by feed flow pipeline and seeps
Suction-chamber's connection；
Temperature control system includes sequentially connected heating cable, temperature controller, temperature control galvanic couple and temperature control galvanic couple chamber, heater wire
Cable is connect with the heating gate of imbibition room housing bottom, and temperature control galvanic couple chamber one end is inserted into imbibition room housing.
2. high temperature and pressure rock core imbibition experimental provision as described in claim 1, which is characterized in that open the bottom of imbibition room housing
Equipped with leakage fluid dram.
3. high temperature and pressure rock core imbibition experimental provision as described in claim 1, which is characterized in that set above imbibition room housing
There is first pressure gauge, first pressure gauge is connect by pressure-measuring pipe line with test cylinder, and the first valve is equipped on pressure-measuring pipe line.
4. high temperature and pressure rock core imbibition experimental provision as claimed in claim 3, which is characterized in that the side of imbibition room housing is set
There is second pressure gauge, second pressure gauge is connect by pressure-measuring pipe line with imbibition room, and the second valve is equipped on pressure-measuring pipe line.
5. high temperature and pressure rock core imbibition experimental provision as described in claim 1, which is characterized in that constant flow pump and intermediate receptacle it
Between third valve is installed on the pipeline that connects.
6. high temperature and pressure rock core imbibition experimental provision as described in claim 1, which is characterized in that be equipped with one point in intermediate receptacle
Intermediate receptacle inner cavity is divided into two chambers, upper chamber up and down and connect with imbibition room by septum piston, piston separator, lower chambers and constant current
Pump connection.
7. high temperature and pressure rock core imbibition experimental provision as claimed in claim 4, which is characterized in that cylinder body and imbibition room housing it
Between connecting pipeline on the 4th valve is installed.
8. high temperature and pressure rock core imbibition experimental provision as described in claim 1, which is characterized in that between testing rock core and piston
It is connected by hook.
9. a kind of method that rock core imbibition experiment is carried out under high temperature and high pressure environment, using experimental provision as claimed in claim 7,
The following steps are included:
(1) preparing experiment material: preparing multiple test and use core samples, test record core sample basic parameter, and according to reality
Test the saturation that purpose carries out respective media to core sample；Different imbibition liquid is prepared according to requirement of experiment；
(2) it connects experimental provision: the core sample of step (1) being suspended on piston base, heating gate is connected by heating cable
Temperature controller, temperature controller are separately connected the heating gate and temperature control galvanic couple of imbibition room housing, temperature control galvanic couple one end insertion temperature
Control galvanic couple chamber；Constant current pump intake connects liquid storing barrel, outlet connection intermediate receptacle, and the upper chamber in intermediate receptacle is equipped with step (1)
The imbibition liquid of preparation is simultaneously connect with imbibition room；
(3) to imbibition room feed flow: imbibition liquid is pumped into imbibition room by constant flow pump, until imbibition liquid is full of imbibition room；
(4) experimental pressure, temperature are adjusted: being full of imbibition liquid in suction-chamber for seep and reaches termination of pumping after requirement of experiment pressure；Setting is real
The temperature of requirement is tested, imbibition room and its interior imbibition liquid are quickly heated, closes the 4th valve；
(5) record experimentation: experiment starts, the registration of reading in each minute a first pressure gauge and second pressure gauge, and one
It reads once within every 10 minutes after hour, reads within every 60 minutes after two hours primary；
(6) experiment terminates: after completing experiment according to requirement of experiment, closing experimental facilities, removal of core sample, finally clean experiment
Equipment waits for that next time, experiment used.
10. the method for rock core imbibition experiment is carried out under high temperature and high pressure environment as claimed in claim 9, which is characterized in that also
It is handled including step (7) analysis of experimental results: seeking core sample quality according to formula (I), and experimental result is accordingly divided
Analysis
In formula: m- imbibition process core quality, g；p1Test end pressure under the cylinder piston, Pa；
p2Test end pressure in the cylinder piston, Pa；The upper and lower area of section of A- piston, cm2；
Maximum static friction force between f- test the cylinder piston and cylinder body, 10-3N；G- acceleration of gravity, 9.8m/s2；
ρ-imbibition liquid density, g/cm3；V- rock core, piston and the total apparent volume of hook, cm3；
m1Piston and hook gross mass, g.
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| CN109459556B (en) * | 2018-12-05 | 2022-07-08 | 中国石油大学(北京) | Dynamic imbibition device and experimental method for dynamic imbibition experiment |
| CN109856030A (en) * | 2019-02-15 | 2019-06-07 | 中国石油大学(北京) | The determination method of imbibition experimental provision and imbibition recovery percent of reserves |
| CN113092234B (en) * | 2021-03-12 | 2022-04-12 | 中国石油大学(北京) | Pressure monitoring device for core huff and puff experiment |
| CN113125274A (en) * | 2021-05-17 | 2021-07-16 | 西南交通大学 | Rock internal capillary action fluctuation test device and method under suction control |
| CN113670778B (en) * | 2021-08-26 | 2023-08-04 | 中国石油大学(华东) | Shale imbibition experimental device based on magnetic levitation metering |
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Effective date of registration: 20191016 Address after: 266580 Qingdao Changjiang Road, Huangdao District, Shandong, No. 66 Co-patentee after: PetroChina Co Ltd Changbei oilfield Changbei operation branch company Patentee after: China University of Petroleum (East China) Address before: 266580 Qingdao Changjiang Road, Huangdao District, Shandong, No. 66 Patentee before: China University of Petroleum (East China) |
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