AU2021102825A4 - A tight oil core imbibition experiment device and an experimental method and an experimental system therefor - Google Patents
A tight oil core imbibition experiment device and an experimental method and an experimental system therefor Download PDFInfo
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- AU2021102825A4 AU2021102825A4 AU2021102825A AU2021102825A AU2021102825A4 AU 2021102825 A4 AU2021102825 A4 AU 2021102825A4 AU 2021102825 A AU2021102825 A AU 2021102825A AU 2021102825 A AU2021102825 A AU 2021102825A AU 2021102825 A4 AU2021102825 A4 AU 2021102825A4
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- 238000005213 imbibition Methods 0.000 title claims abstract description 137
- 238000002474 experimental method Methods 0.000 title claims abstract description 54
- 238000005303 weighing Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims description 50
- 239000007788 liquid Substances 0.000 claims description 21
- 238000003860 storage Methods 0.000 claims description 19
- 229920006395 saturated elastomer Polymers 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 33
- 230000008859 change Effects 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N2035/00346—Heating or cooling arrangements
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
A tight oil core imbibition experiment device, which is characterised in that it comprises an imbibition tank,
a tray, a weighing sensor,, a circulating tube, a water pump, a heater, unit and a pressurizing unit. The tray
is installed in the imbibition tank. The tray is installed in the imbitition tank, the weighing sensor is fixed
inside the imbititon tank, the sense axis of the weighing sensor is connected to the tray and used to
measure the weight of an object on the tray; one end of the circulating tube is connected to the inner cavity
in the lower part of the imbibition tank, and the other end of the circulating tube is connected to the inner
cavity in the upper part of the imbibition tank, the water pump is disposed on the circulating tube, the
heater unit provides heat for the imbibition tank; the pressurising unit provides gas pressure for the
imbitition tank.
71
3771 73712 ff1 i d b
/ ................. .
Is .........................
..................
-/- -- -
. ........
a
23 3
f a4
Figure 1
Description
3771 73712 ff1 i d b / . ................ Is .........................
. ........ a
23 3 f a4
Figure 1
A tight oil core imbibition experiment device and an experimental method
and an experimental system therefor
[0001] The present invention belongs to the field of tight oil development research, in particular to a tight oil core imbibition experiment device and an experimental method and an experimental system therefor.
[0002] At present, tight oil is mainly exploited by multi-stage fracturing of horizontal wells. The technology can be used to make fractures in the reservoir artificially to increase the permeability, connectivity and flow conductivity of the reservoir so as to improve the mining speed. But as a result, the reservoir production declines rapidly, and there is high water content at the later stage. Moreover, only the crude oil in the fractures can be diverted, while the massive crude oil in the matrix cannot be effectively exploited by the fracturing technology.
[0003] The main principle of imbibition is that the crude oil in the matrix is drawn out by forward and reverse imbibition under the action of gravity and capillary pressure in order to maximize the exploitation of the reservoir.
[0004] There are few experimental studies on imbibition with respect to the matrix and fracturing fluid in super-low permeability and tight reservoirs. Moreover, an imbibition experiment lasts for a long time, whereas only a small amount of crude oil can be drawn out from the core during the experimental process, and because there is a high requirement for the accuracy of measured mass data, the experimental phenomena are difficult to observe under high pressure conditions, i.e., the experimental strength is high.
[0005] The conventional imbibition experiment equipment is primarily used under normal pressure conditions. The balance suspension method is used for weighing, while the high-temperature imbibition chamber is isolated from the balance for testing to record the change in the core mass, but the ambient vibration greatly affects the measurement accuracy of the balance; when a high-pressure imbibition experiment is conducted, the imbibition tank must be sealed up, and the change in the core mass cannot be recorded continuously. The only way is to stop the experiment and take out the core for weighing. Owing to the imperceptible change in the mass, a big operating error cannot be avoided, making it impossible to reflect the reality; in the conventional static imbibition equipment, the imbibition liquid in the imbibition tank is in a static state, and the crude oil drawn out by imbibition adheres to the surface of the core. This is not conducive to measuring the change in the mass, and has unclear impact on subsequent core imbibition, which is bad for the study of the core imbibition law.
[0006] Therefore, for the study of the core imbibition law, it is of great significance to design a device in accordance with the formation conditions, including high temperature and high pressure, that can be used to simulate the flow state of a formation fluid and continuously record the change in the core mass during the imbibition process.
[0007] Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of common general knowledge in the field.
[0008] PROBLEMS TO BE SOLVED.
[0009] The purpose of the present invention is to overcome the above-mentioned technical vulnerability and provide a tight oil core imbibition experiment device that can simulate the formation conditions, including high temperature and high pressure, simulate the flow state of a formation fluid and continuously record the change in the core mass during the imbibition process.
[0010] It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.
[0011] MEANS FOR SOLVING THE PROBLEM.
[0012] In order to achieve the above technical purpose, technical proposal of the present invention provides a tight oil core imbibition experiment device, which comprises an imbibition tank, a tray, a weighing sensor, a circulating tube, a water pump, a heater unit and a pressurizing unit. The tray is installed in the imbibition tank; the weighing sensor is fixed inside the imbibition tank; the sense axis of the weighing sensor is connected to the tray and used to measure the weight of an object on the tray; one end of the circulating tube is connected to the inner cavity in the lower part of the imbibition tank, and the other end of the circulating tube is connected to the inner cavity in the upper part of the imbibition tank; the water pump is disposed on the circulating tube; the heater unit provides heat for the imbibition tank; the pressurizing unit provides gas pressure for the imbibition tank.
[0013] The present invention also provides an experimental method for the tight oil core imbibition experiment device, and the experimental method comprises the steps of:
[0014] 1) measuring the core mass m, soaking the core in oil until it is saturated, measuring the fully saturated core mass M and oil density po, and calculating the volume of the saturated oil;
[0015] 2) Placing the saturated core prepared in Step 1 on the tray;
[0016] 3) Starting the water pump to pump imbibition liquid into the imbibition tank, and turning on the heater unit and the pressurizing unit;
[0017] 4) Using the weighing sensor to measure the core mass at equal time intervals, including ml, m2, m3...mn;
[0018] 5) Calculating the circulating imbibition oil recovery R of the core.
[0019] The present invention also provides a tight oil core imbibition experiment system, which comprises a tight oil core imbibition experiment device, a signal collector and a display terminal;
[0020] The signal collector is electrically connected to the weighing sensor, and collects a weighing signal;
[0021] The display terminal is electrically connected to the signal collector, and obtains the mass of the core according to the weighing signal, and displays the mass value of the core.
[0022] Compared with the prior art, the present invention has beneficial effects that when the tight oil core imbibition experiment device is in use, the experimenter can place the oil-saturated core on the tray and fill the imbibition tank with imbibition liquid; then, the experimenter can start the water pump, the heater unit and the pressurizing unit, of which the water pump can simulate the flow state of the formation fluid, while the heater unit and the pressurizing unit can simulate the formation conditions, including high temperature and high pressure, can keep a persistent record of the change in core mass during the process of imbibition.
[0023] Figure 1 is a structure diagram of the tight oil core imbibition experiment device provided by the present invention in one embodiment.
[0024] Preferred embodiments of the invention will now be described with reference to the accompanying drawings and non-limiting examples.
[0025] In order to further clarify the purpose, technical protocol and advantages of the present invention, the present invention is further described in detail below by reference to the appended drawing and embodiments. It should be understood that the embodiments described here are only used to explain the present invention, but not to limit the present invention.
[0026] The embodiment shown in Drawing 1 provides a tight oil core imbibition experiment device. The tight oil core imbibition experiment device comprises an imbibition tank 1, a tray 2, a weighing sensor 3, a circulating tube 4, a water pump 5, a heater unit 65 and a pressurizing unit 7.
[0027] The tray 2 is installed in the imbibition tank 1; the weighing sensor 3 is fixed inside the imbibition tank 1; the sense axis 3a of the weighing sensor 3 is connected to the tray 2 and used to measure the weight of an object on the tray 2.
[0028] One end of the circulating tube 4 is connected to the inner cavity in the lower part of the imbibition tank 1, and the other end of the circulating tube 4 is connected to the inner cavity in the upper part of the imbibition tank 1; the water pump 5 is disposed on the circulating tube 4; the heater unit 6 provides heat for the imbibition tank 1; the heater unit 6 can be a heating wire or a condenser, and the heater unit 6 is preferably a condenser in the present embodiment; the pressurizing unit 7 provides gas pressure for the inner cavity of the imbibition tank 1; it should be noted that the water pump 5, the heater unit 6 and the pressurizing unit 7 all require a power source to provide energy for them. That is the prior art, so its connectivity and usage are not described in detail here.
[0029] The experimenter can place the oil-saturated core a on the tray 2 and fill the imbibition tank 1 with imbibition liquid; then, the experimenter can start the water pump , the heater unit 6 and the pressurizing unit 7. The water pump 5 can simulate the flow state of the formation fluid; the heat generated by the heater unit 6 and the high pressure generated by the pressurizing unit 7 can simulate the formation conditions, including high temperature and high pressure; the weighing sensor 3 can keep a persistent record of the change in the mass of the core a during the process of imbibition.
[0030] Preferably, the imbibition tank 1 comprises an imbibition tank body 11 and a cover 12; the upper end of the imbibition tank body 11 is open; the cover 12 is detachably connected to the upper opening of the imbibition tank body 11. In the embodiment, the cover 12 comprises a cover surface and a cover body that extends down from the outer edge of the cover surface; the cover body 12 is detachably connected to the edge of the upper opening of the imbibition tank body 11. Specifically, the inner peripheral surface of the cover body is provided with an internal thread; the upper end of the imbibition tank body 11 is disposed on an external thread that is matched and connected with the internal thread.
[0031] Preferably, the pressurizing unit 7 comprises a nitrogen gas cylinder 71, a first gas tube 72, a second gas tube 73, a first gas valve 73 and a second gas valve 74; one end of the first gas tube 72 is connected to the inner cavity of the imbibition tank 1, and the other end of the first gas tube 72 is connected to the first gas valve; one end of the second gas tube 73 is connected to the nitrogen gas cylinder 71, and the other end of the second gas tube 73 is connected to the intermediate section of the first gas tube 72; the second gas valve 74 is disposed on the second gas tube 73. The user can open the first gas valve 73 to inflate the imbibition tank with the gas. After the experiment is completed, the user can open the second gas valve 74 for pressure relief.
[0032] In the embodiment, the water pump 5 is a constant flow pump, thus ensuring the flow stability of the imbibition liquid in the imbibition tank 1.
[0033] Preferably, the tight oil core imbibition experiment device also comprises a liquid storage tank 8; the circulating tube 4 comprises a first connecting tube, a second connecting tube and a third connecting tube; one end of the first connecting tube is connected to the inner cavity in the lower part of the imbibition tank, and d the other end of the first connecting tube is connected to the water outlet of the water pump 5; one end of the second connecting tube is connected to the water inlet of the water pump 5, and the other end of the second connecting tube is connected to the inner cavity in the lower part of the liquid storage tank 1; one end of the third connecting tube is connected to the inner cavity of the liquid storage tank 1, and the other end of the third connecting tube is connected to the inner cavity in the upper part of the imbibition tank 1. At the beginning of the experiment, the water pump 5 pumps the imbibition liquid in the liquid storage tank 8 into the imbibition tank 1.
[0034] Preferably, the tight oil core imbibition experiment device also comprises a first back-pressure valve a, and the back-pressure valve is disposed on the first connecting tube. The tight oil core imbibition experiment device also comprises a second back pressure valve b, and the second back-pressure valve is disposed on the third connecting tube. This further ensures that the imbibition liquid in the imbibition tank 1 flows uniformly from the bottom up, avoiding any flow rate fluctuation arising from liquid flow, thereby ensuring stable flow and pressure. In order to maintain the circulating flow of the imbibition liquid without affecting the monitoring on the change in the mass of the core a, the flow rate of the constant flow pump is controlled to be less than 2ml/min.
[0035] In the embodiment, the tight oil core imbibition experiment device also comprises an insulated cabinet 9, thereby maintaining constant temperature.
[0036] In the embodiment, the first gas valve 73 and the second gas valve 74 are both electronic control valves; the first connecting pipe is provided with a first water valve c, and the third connecting pipe is provided with a second water valve d; the first water valve c and the second water valve d are both electronic control valves, too.
[0037] The imbibition tank 1 is internally provided with a temperature sensor and a pressure sensor. The temperature sensor is used to measure the temperature of the imbibition liquid in the imbibition tank 1, while the pressure sensor is used to measure the gas pressure in the imbibition tank 1.
[0038] Preferably, the tight oil core imbibition experiment device also comprises a gas booster e. The gas booster e is disposed at the junction of the first gas tube 72 and the second gas tube 73; the nitrogen gas cylinder 71 is a gas source; the nitrogen gas cylinder 71 is connected to the gas booster e via the second gas tube 73; the gas booster e pressurizes the inner cavity of the imbibition tank 1 till experimental pressure, with the pressure set and stabilized by the control system. The pressure change is displayed on the display screen. After the experiment is over, the second gas valve 73 is closed first while the second gas valve 74 is opened. The gas booster e slowly releases pressure to ensure the safety of pipeline disassembly.
[0039] Preferably, the tight oil core imbibition experiment device also comprises a storage bin f. The storage bin is installed in the imbibition tank 1 and fixed to the imbibition tank 1; the weighing sensor 3 is installed in the storage bin f and fixed to the storage bin f; the sense axis of the weighing sensor 3 extends through a through hole in the upper part of the storage bin f and then is connected to the lower end surface of the tray 2. The storage bin f is filled with waterproof sealing silicone to prevent the weighing sensor 3 from coming into contact with the imbibition liquid. Specifically, the weighing sensor 3 is a single-point contact type. The mass of the core changes during the process of imbibition, while the pressure change between the tray 2 and the weighing sensor 3 is transmitted by the sense axis 3a.
[0040] In the embodiment, the weighing sensor 3 is an aluminum-alloy single-point weighing sensor. The weighing sensor 3 has strong resistance to pressure, a measurement range of 0.3kg, high accurate, which is up to 0.01%F.S, and a maximum experimental temperature of 80°C; the mass change data acquired by the weighing sensor 3 is wirelessly transmitted to the data acquisition system.
[0041] Preferably, the tight oil core imbibition experiment device also comprises a control panel. The control panel is provided with a display screen for displaying the real time temperature of the imbibition tank the pressure in its inner cavity.
[0042] The present invention also provides a tight oil core imbibition experiment system, which comprises the tight oil core imbibition experiment device and a signal collector and a display terminal;
[0043] The signal collector is electrically connected to the weighing sensor, and collects a weighing signal;
[0044] The display terminal is electrically connected to the signal collector, and obtains the mass of the core according to the weighing signal, and displays the mass value of the core, thereby realizing data acquisition.
[0045] The embodiment provides a preferred method, whereby the pressure sensor, the temperature sensor and the weighing sensor 3 are all electrically connected to the signal collector.
[0046] The heater unit 7, the first gas valve 73, the second gas valve 74, the first water valve c and the second water valve d are all electrically connected to a control system. The control system is used to control the temperature of the heater unit and the valves.
[0047] The control system is electrically connected to the signal collector; the control system conducts feedback regulation of the temperature and gas pressure in the imbibition tank according to the signal value collected by the signal collector.
[0048] The present invention also provides an experimental method for the tight oil core imbibition experiment device, and the method comprises the steps of:
[0049] 1) measuring the core mass m, soaking the core in oil until it is saturated, measuring the fully saturated core mass M and oil density po, and calculating the volume of the saturated oil;
[0050] 2) Placing the saturated core prepared in Step 1 on the tray;
[0051] 3) Starting the water pump to pump imbibition fluid into the imbibition tank, and turning on the heater unit and the pressurizing unit;
[0052] 4) Use the weighing sensor to measure the mass of the core at equal time intervals, including ml, m2, m3... mn;
[0053] 5) Calculating the circulating imbibition oil recovery R of the core.
[0054] The specific calculation formula is as follows: the volume of saturated oil in Step 1 circulating imbibition oil recovery R of the core, wherein the density of the imbibition fluid is pL.
[0055] After the experiment is over, the constant flow pump, the heater unit and the gas booster were stopped, the second gas valve is closed, and the first gas value is opened, so that the pressure in the imbibition tank is released till normal pressure before the cover body is opened to take out the core and clean the experimental equipment.
[0056] The above-mentioned embodiments of the present invention do not limit the protection scope of the present invention. Any other change or modification made according to the technical conception of the present invention shall be included in the protection scope of the claims of the present invention.
[0057] Although the invention has been described with reference to specific examples, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms, in keeping with the broad principles and the spirit of the invention described herein.
[0058] The present invention and the described preferred embodiments specifically include at least one feature that is industrial applicable.
Claims (10)
1. A tight oil core imbibition experiment device, which is characterized in that it comprises an imbibition tank, a tray, a weighing sensor, a circulating tube, a water pump, a heater unit and a pressurizing unit. The tray is installed in the imbibition tank. The tray is installed in the imbibition tank; the weighing sensor is fixed inside the imbibition tank; the sense axis of the weighing sensor is connected to the tray and used to measure the weight of an object on the tray; one end of the circulating tube is connected to the inner cavity in the lower part of the imbibition tank, and the other end of the circulating tube is connected to the inner cavity in the upper part of the imbibition tank; the water pump is disposed on the circulating tube; the heater unit provides heat for the imbibition tank; the pressurizing unit provides gas pressure for the imbibition tank.
2. The tight oil core imbibition experiment device, as claimed in Claim 1, is characterized in that the pressurizing unit comprises a nitrogen gas cylinder, a first gas tube, a second gas tube, a first gas valve and a second gas valve; one end of the first gas tube is connected to the inner cavity of the imbibition tank, and the other end of the first gas tube is connected to the first gas valve; one end of the second gas tube is connected to the nitrogen gas cylinder, and the other end of the second gas tube is connected to the intermediate section of the first gas tube; the second gas valve is disposed on the second gas tube.
3. The tight oil core imbibition experiment device, as claimed in Claim 1, is characterized in that the tight oil core imbibition experiment device also comprises a storage bin; the storage bin is installed in the imbibition tank and fixed to the imbibition tank; the weighing sensor is installed in the storage bin and fixed to the storage bin; the sense axis of the weighing sensor extends through a through hole in the upper part of the storage bin and then is connected to the lower end surface of the weighing plate.
4. The tight oil core imbibition experiment device, as claimed in Claim 1, is characterized in that the tight oil core imbibition experiment device also comprises a liquid storage tank; the circulating tube comprises a first connecting tube, a second connecting tube and a third connecting tube; one end of the first connecting tube is connected to the inner cavity in the lower part of the imbibition tank, and the other end of the first connecting tube is connected to the water outlet of the water pump; one end of the second connecting tube is connected to the water inlet of the water pump, and the other end of the second connecting tube is connected to the inner cavity in the lower part of the liquid storage tank; one end of the third connecting tube is connected to the inner cavity of the liquid storage tank, and the other end of the third connecting tube is connected to the inner cavity in the upper part of the imbibition tank.
5. The tight oil core imbibition experiment device, as claimed in Claim 4, is characterized in that the tight oil core imbibition experiment device also comprises a first back-pressure valve, and the back-pressure valve is disposed on the first connecting tube.
6. The tight oil core imbibition experiment device, as claimed in Claim 4, is characterized in that the tight oil core imbibition experiment device also comprises a second back-pressure valve, and the second back-pressure valve is disposed on the third connecting tube.
7. The tight oil core imbibition experiment device, as claimed in Claim 4, is characterized in that the tight oil core imbibition experiment device also comprises an insulated cabinet; the imbibition tank, the liquid storage tank and the heater unit are all installed in the insulated cabinet.
8. The experiment method for the tight oil core imbibition experiment device, as claimed in Claim 1-7, comprises the following steps of: 1) measuring the core mass m, soaking the core in oil until it is saturated, measuring the fully saturated core mass M and oil density po, and calculating the volume of the saturated oil; 2) Placing the saturated core prepared in Step 1 on the tray; 3) Starting the water pump to pump imbibition liquid into the imbibition tank, and turning on the heater unit and the pressurizing unit; 4) Using the weighing sensor to measure the core mass at equal time intervals, including ml, m2, m3...mn; 5) Calculating the circulating imbibition oil recovery R of the core.
9. The tight oil core imbibition experiment device, as claimed in Claim 8, is characterized in that the circulating imbibition oil recovery R of the core in the saturated oil prepared in Step 1, wherein the density of the imbibition liquid is pL.
10. A tight oil core imbibition experiment system, which is characterized in that it comprises the tight oil core imbibition experiment device described in any of Claim 1~7, and also comprises a signal collector and a display terminal; the signal collector is electrically connected to the weighing sensor, and collects a weighing signal; the display terminal is electrically connected to the signal collector, and obtains the mass of the core according to the weighing signal, and displays the mass value of the core.
-1/1-
Figure 1
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| AU2021102825A AU2021102825A4 (en) | 2021-05-25 | 2021-05-25 | A tight oil core imbibition experiment device and an experimental method and an experimental system therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021102825A AU2021102825A4 (en) | 2021-05-25 | 2021-05-25 | A tight oil core imbibition experiment device and an experimental method and an experimental system therefor |
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| AU2021102825A4 true AU2021102825A4 (en) | 2021-07-22 |
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| AU2021102825A Ceased AU2021102825A4 (en) | 2021-05-25 | 2021-05-25 | A tight oil core imbibition experiment device and an experimental method and an experimental system therefor |
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