An apparatus for quantifying permeation flow capacity in a laboratory and an experimental method thereof

Abstract

A kind of laboratory quantification permeation flow capacity device, comprising: displacement liquid filling bottle for filling displacement liquid, the top of displacement liquid filling bottle is erected with displacement liquid level gauge communicated with its cavity;Oil filling bottle for filling crude oil, the top of oil filling bottle is erected with crude oil level gauge communicated with its cavity;Permeation material holder, which includes holding cylinder, first push glass and second push glass are oppositely arranged in holding cylinder, the first push glass is fixedly connected relative to holding cylinder, the second push glass is axially movable relative to holding cylinder, glass gasket with aperture and permeation material fixed by glass gasket are arranged between first push glass and second push glass.The laboratory quantification permeation flow capacity device of the present application is simple and durable, and the operation method is simple, which provides test facilities for exploring the mechanism of reservoir fluid multi-effect synergistic oil displacement experiment, and enriches the test method for verifying the permeation capacity of permeation material.

Description

Technical Field

[0001] This invention relates to the field of porous media permeability testing technology, specifically to a laboratory apparatus and experimental method for quantifying permeability. Background Technology

[0002] Unconventional oil and gas resources occupy an important position in my country's energy development. Tight oil, as a type of unconventional oil and gas resource, has a global untapped resource volume of 345 × 10⁻⁶. 8 The reservoir, with its immense exploration and development potential, is characterized by its tight, hard, and low-permeability structure, necessitating hydraulic fracturing to connect natural fractures. To enhance the recovery rate of unconventional tight oil reservoirs, it is crucial to elucidate the mechanisms and control methods of intra-reservoir flow, explore the unique fluidity of tight oil reservoirs, and thus reveal the mechanisms of enhanced oil recovery and improve oil displacement effects. With advancements in technology and improved understanding, in-fracture flow research alone is insufficient to meet the demands of understanding deeper mechanisms of enhanced oil recovery; therefore, infiltration-based production enhancement has begun to gain traction among petroleum workers.

[0003] In the research process of percolation-induced oil recovery, some phenomena or laws have emerged that cannot be explained or are difficult to explain using percolation flow and seepage flow. Therefore, some scholars have gradually proposed the concept of seepage flow with semi-permeable membrane properties in reservoirs. Focusing on the unique characteristics of deep tight oil reservoirs, such as high temperature and pressure, low permeability, variable pressure systems, and strong reservoir heterogeneity, some researchers have pointed out that fluid flow between different media can be divided into fracture flow, percolation flow caused by matrix capillary forces, and seepage flow caused by concentration differences between pores. They have proposed a multi-effect synergistic oil displacement mode of fracture flow-percolation flow-seepage flow.

[0004] Given the lack of existing experimental apparatus and methods in the laboratory to verify the existence of permeation flow and test the permeability of different substances under various conditions, it is crucial to establish a new, simpler laboratory testing apparatus for quantifying and verifying permeation flow in an indoor setting. Summary of the Invention

[0005] Based on this, the present invention provides a device and experimental method for quantifying permeation flow capacity in the laboratory, in order to solve the technical problem that there are currently no existing experimental devices and methods in the laboratory that can verify the existence of permeation flow and test the strength of the permeation capacity of different substances under different conditions.

[0006] To achieve the above objectives, the present invention provides an apparatus for quantifying permeability in a laboratory setting, comprising:

[0007] A displacing fluid filling bottle is used to fill displacing fluid, and a displacing fluid level gauge is erected on the top of the displacing fluid filling bottle and communicates with its cavity.

[0008] The crude oil filling bottle is used for filling crude oil, and a crude oil liquid level gauge is arranged on the top of the crude oil filling bottle and communicates with the cavity of the crude oil filling bottle.

[0009] The permeation material holder comprises a holding cylinder, a first pushing glass plate and a second pushing glass plate are oppositely arranged in the holding cylinder, the first pushing glass plate is fixedly connected to the holding cylinder, the second pushing glass plate is axially movable relative to the holding cylinder, a closed space is arranged between the first pushing glass plate and the second pushing glass plate, a glass gasket with pores is arranged in the closed space, and a permeation material with semi-permeable membrane properties is fixed by the glass gasket.

[0010] The first connecting nozzle is arranged on the displacing liquid filling bottle and communicates with the cavity of the displacing liquid filling bottle, and the first liquid inlet nozzle is arranged on the first pushing glass plate and communicates with the closed space; the second connecting nozzle is arranged on the crude oil filling bottle and communicates with the cavity of the crude oil filling bottle, and the second liquid inlet nozzle is arranged on the second pushing glass plate and communicates with the closed space; the first connecting nozzle and the first liquid inlet nozzle are connected by a pipeline, and the second connecting nozzle and the second liquid inlet nozzle are connected by a pipeline.

[0011] As a further preferred technical solution of the present application, the first connecting nozzle is arranged in the middle of the displacing liquid filling bottle, the upper part of the displacing liquid filling bottle is further provided with a first liquid inlet nozzle, and the lower part of the displacing liquid filling bottle is further provided with a first liquid outlet nozzle; the second connecting nozzle is arranged in the middle of the crude oil filling bottle, the upper part of the crude oil filling bottle is further provided with a second liquid inlet nozzle, and the lower part of the crude oil filling bottle is further provided with a second liquid outlet nozzle.

[0012] As a further preferred technical solution of the present application, a sealing rubber ring is arranged on the outer periphery of the second pushing glass plate and contacts the holding cylinder, so that the second pushing glass plate in movement is in sealing connection with the holding cylinder.

[0013] As a further preferred technical solution of the present application, the glass gasket is two pieces and is arranged in the axial direction of the holding cylinder, and the permeation material is clamped between the glass gaskets.

[0014] As a further preferred technical solution of the present application, the first liquid inlet nozzle and the second liquid inlet nozzle are each connected with a transparent glass tube, the first liquid inlet nozzle is connected with the pipeline connected with the first connecting nozzle through the corresponding glass tube, and the second liquid inlet nozzle is connected with the pipeline connected with the second connecting nozzle through the corresponding glass tube.

[0015] As a further preferred technical solution of the present application, the displacing liquid liquid level gauge and the crude oil liquid level gauge are provided with a measurement scale, and the precision is 0.01 ml / scale.

[0016] As a further preferred technical solution of the present application, the diameter of the permeation material is 25 mm, and the length is 1-100 mm.

[0017] As a further preferred technical solution of the present application, the composition of the displacement fluid comprises a surfactant (anionic, cationic, etc.), a potassium chloride or sodium chloride, etc. to adjust the salinity of the displacement fluid, and the solvent for configuring the displacement fluid is ultrapure water; the crude oil is mixed with kerosene in a volume ratio of 20%.

[0018] According to another aspect of the present application, the present application also provides a method for performing a permeation flow quantification test by using a device for quantifying the permeation flow capacity in a laboratory, comprising the following steps:

[0019] 1) The dried permeation material is clamped between two glass gaskets and placed in the closed space of the permeation material holder as a whole;

[0020] 2) The first connecting nozzle on the displacement fluid filling bottle is communicated with the first liquid inlet nozzle on the permeation material holder, and the second connecting nozzle on the crude oil filling bottle is communicated with the second liquid inlet nozzle on the permeation material holder;

[0021] 3) The displacement fluid and the crude oil are respectively filled into the displacement fluid filling bottle and the crude oil filling bottle, and the filling volumes of the displacement fluid and the crude oil are recorded by the displacement fluid liquid level meter and the crude oil liquid level meter respectively;

[0022] 4) The liquid level changes of the displacement fluid liquid level meter and the crude oil liquid level meter are observed in real time, and the experiment is ended after the liquid level is stable.

[0023] The device for quantifying the permeation flow capacity in a laboratory (referred to as experimental device) and the corresponding test method of the present application can be used to verify and quantify the permeation flow capacity of the permeation material, especially the permeation flow capacity of the core. For the test material with permeation capacity, factors affecting the permeation flow capacity can be tested at the same time, such as the type and concentration of the displacement fluid, the temperature of the experiment, the properties of the crude oil, and the thickness of the experimental material.

[0024] The experimental device and the experimental method of the present application have the following advantages: the present application fills the gap of quantifying the permeation flow capacity of the permeation material, the experimental device is simple and durable, and the operation method is simple; the present application provides a test facility and method for further exploring the experimental mechanism of the reservoir fluid multi-effect synergistic oil displacement, and enriches the test method for verifying the permeation capacity of the permeation material. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0026] Figure 1 The structural schematic diagram of an embodiment provided by the device for quantifying the permeation flow capacity in a laboratory of the present application.

[0027] Figure 2This is a flowchart illustrating the permeation flow quantification test performed on the apparatus for quantifying permeation flow capacity in the laboratory according to the present invention.

[0028] In the diagram: 1. First two-way valve; 2. Displacement fluid filling bottle; 3. First drain nozzle; 4. First connecting nozzle; 5. First filling nozzle; 6. Displacement fluid level gauge; 7. Transparent rubber tube; 8. Permeable material holder; 9. First glass tube; 10. First propulsion slide; 11. First inlet nozzle; 12. Permeable material; 13. Second inlet nozzle; 14. Glass gasket; 15. Sealing ring; 16. Second propulsion slide; 17. Second glass tube; 18. Crude oil filling bottle; 19. Second connecting nozzle; 20. Second drain nozzle; 21. Second filling nozzle; 22. Crude oil level gauge; 23. Second two-way valve.

[0029] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Terms such as "upper," "lower," "left," "right," "middle," and "one" used in the preferred embodiments are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0031] Example 1

[0032] like Figure 1 As shown, the present invention provides an apparatus for quantifying permeability in a laboratory setting, comprising:

[0033] Displacement liquid filling bottle 2 is used to fill displacement liquid. The top of the displacement liquid filling bottle 2 is equipped with a displacement liquid level meter 6 that communicates with its cavity. The accuracy of the displacement liquid level meter 6 is 0.01 ml / graduation.

[0034] A crude oil filling bottle 18 is used to fill crude oil. A crude oil level gauge 22, communicating with its cavity, is erected on the top of the filling bottle 18. The crude oil level gauge 22 has an accuracy of 0.01 ml / graduation.

[0035] The permeation material holder 8 comprises a clamping cylinder, a first pushing glass sheet 10 and a second pushing glass sheet 16 are oppositely arranged in the clamping cylinder, the first pushing glass sheet 10 is fixedly connected to the clamping cylinder, the second pushing glass sheet 16 is axially movable relative to the clamping cylinder, and a sealing rubber ring 15 is further arranged on the outer periphery of the second pushing glass sheet 16 and in contact with the clamping cylinder, so that the second pushing glass sheet 16 in movement is sealingly connected to the clamping cylinder, a closed space is formed between the first pushing glass sheet 10 and the second pushing glass sheet 16, and two glass gaskets 14 with apertures are arranged in the closed space and spaced apart along the axial direction, and a permeation material 12 with semi-permeable membrane properties is clamped between the two glass gaskets 14, and the permeation material 12 can be selected as a core slice or other materials with semi-permeable membrane properties.

[0036] The displacement liquid filling bottle 2 is provided with a first connecting nozzle 4 in communication with the cavity thereof, the first pushing glass sheet 10 is provided with a first liquid inlet nozzle 11 in communication with the closed space, the crude oil filling bottle 18 is provided with a second connecting nozzle 19 in communication with the cavity thereof, and the second pushing glass sheet 16 is provided with a second liquid inlet nozzle 13 in communication with the closed space, and the first connecting nozzle 4 and the first liquid inlet nozzle 11 are connected by a pipeline, and the second connecting nozzle 19 and the second liquid inlet nozzle 13 are connected by a pipeline.

[0037] During the experiment, the meter (displacement liquid level meter 6 and crude oil level meter 22) reads the permeation volume, and the permeation capacity of different permeation materials can be intuitively compared according to the size of the permeation volume. Under different experimental conditions of the same permeation material, the influence of each experimental factor on the permeation flow can be qualitatively judged by the permeation volume.

[0038] Specifically, the first connecting nozzle 4 is arranged at the middle part of the displacement liquid filling bottle 2, the upper part of the displacement liquid filling bottle 2 is further provided with a first liquid adding nozzle 5, and the lower part of the displacement liquid filling bottle 2 is further provided with a first liquid discharging nozzle 3; the second connecting nozzle 19 is arranged at the middle part of the crude oil filling bottle 18, the upper part of the crude oil filling bottle 18 is further provided with a second liquid adding nozzle 21, and the lower part of the crude oil filling bottle 18 is further provided with a second liquid discharging nozzle 20. The first liquid adding nozzle 5 and the second liquid adding nozzle 21 are respectively used for adding experimental liquid into the corresponding solution filling bottle, the first liquid discharging nozzle 3 and the second liquid discharging nozzle 20 are respectively connected with a first two-way valve 1 and a second two-way valve 23, and the two two-way valves are used for closing or opening the corresponding liquid discharging nozzle.

[0039] Preferably, the first liquid inlet nozzle 11 and the second liquid inlet nozzle 13 are respectively connected with transparent first glass tubes 9, the first liquid inlet nozzle 11 is connected with the pipeline connecting the first connecting nozzle 4 through the corresponding first glass tube 9, and the second liquid inlet nozzle 13 is connected with the pipeline connecting the second connecting nozzle 19 through the corresponding second glass tube 17, and the glass tube can visually observe the flow conditions of the corresponding displacement fluid and crude oil. Preferably, the pipeline for connection is selected from transparent rubber tubes 7.

[0040] Embodiment 2

[0041] The application also provides a method for quantitatively testing the permeation flow of the above-mentioned laboratory device for quantitatively testing the permeation flow, and the selective permeability of the permeation material is tested by experiment. Different types of displacement fluids and crude oils are filled in the displacement fluid filling bottle 2 and the crude oil filling bottle 18 according to a certain proportion. The permeation flow is caused by the difference in ion concentration, so the permeation flow capacity of the selected permeation material 12 can be judged and quantified by observing the change of the solution scale in the displacement fluid liquid level meter 6 and the crude oil liquid level meter 22. As shown in the figure, the method specifically includes the following steps: Figure 2

[0042] Step 1, preparation work before permeation flow quantitative test:

[0043] Select the core to be tested as the experimental material, cut the core to be tested into a core slice with a thickness of 5mm, remove impurities, and then perform drying treatment, and then perform saturation oil experiment;

[0044] Prepare a 3% sodium chloride solution and an ultrapure water solution; place the saturated core in four wicking bottles, fill the core saturated with oil in the four wicking bottles, fill the first group and the third group of wicking bottles with ultrapure water, fill the second group and the fourth group of wicking bottles with 3% NaCl solution, and replace the ultrapure water in the second group of wicking bottles with 3% NaCl solution and replace the NaCl solution in the third group of wicking bottles with ultrapure water on the fifth day of wicking.

[0045] Observe the difference in wicking volume between the control group and the experimental group after static wicking for 15 days. During the process of static wicking, the wicking volume of the two groups of experiments is recorded every half day, and the oil displacement efficiency is calculated by using the final wicking volume. If the difference in the final oil displacement efficiency of each group is obvious, it is proved that the core to be tested has the property of semi-permeable membrane (permeation flow capacity), otherwise, it does not have the property.

[0046] If the core to be tested has the property of semi-permeable membrane, the permeation flow capacity quantitative experiment test is performed;

[0047] Step 2, permeation flow capacity quantitative experiment:

[0048] ​Prepare 500 mL of crude oil with a density of 0.8 g / cm 3 and 500 mL of displacement fluid, the water for configuring the displacement fluid is ultrapure water, and the crude oil is a simulated oil mixed by 20% kerosene and 80% crude oil by volume;

[0049] Fill the glass gasket with a suitable thickness at one end of the permeable material holder first pushing glass sheet 10, and then place the dried core (verified to have semi-permeable membrane properties in step 1) in the permeable material holder 8, and fill the glass gasket with a suitable thickness, and use the movable pushing device to adhere the glass gasket, core and fixed end, and seal the port of the movable pushing device. Clamped and fixed by two glass gaskets 14, connect the permeable material holder 8 with the displacement fluid filling bottle 2 and the crude oil filling bottle 18, close the first discharge nozzle 3 and the second discharge nozzle 20, and check the sealing;

[0050] Add the displacement fluid and the crude oil into the displacement fluid filling bottle 2 and the crude oil filling bottle 18 respectively, seal the first liquid filling nozzle 5, the second liquid filling nozzle 21, and the upper end opening of the displacement fluid liquid level gauge 6 and the crude oil liquid level gauge 22, and record the filling volumes of the two filling bottles respectively through the displacement fluid liquid level gauge 6 and the crude oil liquid level gauge 22;

[0051] Observe the liquid level changes of the displacement fluid liquid level gauge 6 and the crude oil liquid level gauge 22 in real time, and end the experiment after the liquid level is stable and unchanged.

[0052] According to the above experimental method, using the same permeable material, first, whether the material has semi-permeable membrane properties is tested, and the test is carried out by changing the experimental conditions, and the specific test results are shown in Table 1; second, the test and exploration of the influence factors of the displacement fluid on the permeation are carried out, and the specific experimental results are shown in Table 2 by changing the temperature, the type and the concentration of the displacement fluid.

[0053] Table 1

[0054]

[0055] Table 2

[0056]

[0057] It can be seen that the selected core to be tested has semi-permeable membrane properties (permeation flow ability), and the temperature, the type and the concentration of the displacement fluid have certain influences on the permeation flow.

[0058] Although the specific embodiments of the present application are described above, those skilled in the art should understand that these are only examples, and various changes or modifications can be made to the embodiments without departing from the principles and essence of the present application, and the protection scope of the present application is only limited by the appended claims.

Claims

1. A device for quantifying permeation flow capacity in a laboratory setting, characterized in that, include: A displacing fluid filling bottle is used to fill displacing fluid, and a displacing fluid level gauge is erected on the top of the displacing fluid filling bottle and communicates with its cavity. A crude oil filling bottle is used to fill crude oil, and a crude oil level gauge is erected on the top of the crude oil filling bottle and communicates with its cavity. as well as A permeable material holder includes a holding cylinder, inside which a first advancing glass slide and a second advancing glass slide are arranged opposite to each other. The first advancing glass slide is fixedly connected to the holding cylinder, and the second advancing glass slide is axially movable relative to the holding cylinder. There is a sealed space between the first advancing glass slide and the second advancing glass slide. A porous glass gasket is provided in the sealed space, and a permeable material with semi-permeable membrane properties is fixed by the glass gasket. The displacement fluid filling bottle is provided with a first connecting nozzle communicating with its cavity, and the first push glass slide is provided with a first liquid inlet communicating with the sealed space; the crude oil filling bottle is provided with a second connecting nozzle communicating with its cavity, and the second push glass slide is provided with a second liquid inlet communicating with the sealed space; the first connecting nozzle and the first liquid inlet, and the second connecting nozzle and the second liquid inlet are respectively connected by pipes. The outer periphery of the second advancing glass slide is provided with a sealing ring that contacts the clamping cylinder, so that the moving second advancing glass slide and the clamping cylinder maintain a sealed connection; the glass gasket consists of two pieces and is spaced apart along the axial direction of the clamping cylinder, and the permeable material is sandwiched between the glass gaskets.

2. The apparatus for quantifying osmotic flow capacity in the laboratory according to claim 1, characterized in that, The first connecting nozzle is located in the middle of the displacing fluid filling bottle, and the upper part of the displacing fluid filling bottle is also provided with a first filling nozzle, and the lower part of the displacing fluid filling bottle is also provided with a first drain nozzle; the second connecting nozzle is located in the middle of the crude oil filling bottle, and the upper part of the crude oil filling bottle is also provided with a second filling nozzle, and the lower part of the crude oil filling bottle is also provided with a second drain nozzle.

3. The apparatus for quantifying laboratory permeability according to claim 1, characterized in that, The first liquid inlet and the second liquid inlet are each connected to a transparent glass tube. The first liquid inlet is connected to a pipe connected to the first connector through a corresponding glass tube, and the second liquid inlet is connected to a pipe connected to the second connector through a corresponding glass tube.

4. The apparatus for quantifying osmotic flow capacity in the laboratory according to claim 1, characterized in that, The displacement fluid comprises surfactants, potassium chloride or sodium chloride, and the solvent used to prepare the displacement fluid is ultrapure water; the displacement fluid level meter and the crude oil level meter are equipped with measuring scales with an accuracy of 0.01 ml / scale.

5. The apparatus for quantifying laboratory permeability according to claim 1, characterized in that, The permeable material has a diameter of 25 mm and a length of 1~100 mm.

6. The apparatus for quantifying laboratory permeability according to any one of claims 1 to 5, characterized in that, The crude oil contains 20% kerosene by volume.

7. A method for quantifying permeability flow using the apparatus for quantifying permeability flow capacity in the laboratory as described in any one of claims 1-6, characterized in that, Includes the following steps: 1) Take dry permeation material and sandwich it between two glass gaskets to form a whole, and place the whole in the sealed space of the permeation material holder; 2) Connect the first connecting nozzle on the displacement fluid filling bottle to the first inlet nozzle on the permeable material holder, and connect the second connecting nozzle on the crude oil filling bottle to the second inlet nozzle on the permeable material holder. 3) Fill the displacement fluid and crude oil into the displacement fluid filling bottle and crude oil filling bottle respectively, and record the corresponding filling volume of each through the displacement fluid level meter and crude oil level meter respectively. 4) Observe the liquid level changes of the displacement fluid level gauge and the crude oil level gauge in real time. The experiment ends when the liquid level stabilizes.

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