Shale oil dissipation testing device

Abstract

The embodiment of the invention provides a shale oil dissipation testing device. Comprising a containing assembly and a detection assembly. The accommodating assembly is provided with an accommodating cavity, and the accommodating cavity can be used for accommodating a sample; the accommodating assembly is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both communicated with the accommodating cavity, so that conductive water can displace shale oil of a sample in the accommodating cavity; the detection assembly comprises a displacement circuit and a detection circuit; the displacement circuit can apply voltage to the two ends of the sample, and the detection circuit can be used for obtaining the resistance change of the sample. Through the device, the dissipation process of shale oil in a water-containing displacement environment is accurately simulated, and the continuous dissipation process of an oil phase in a shale sample from a matrix to an external space is subjected to multi-point, dynamic and quantitative monitoring and characterization through resistance change, so that the heterogeneity of the dissipation capability of the shale oil in the space is intuitively reflected.

Description

Technical Field

[0001] This application relates to the field of oil extraction, and in particular to a shale oil spill detection device. Background Technology

[0002] Shale oil, as an unconventional oil and gas resource, relies on volumetric fracturing and fracture network stimulation technologies to create complex fracture networks that facilitate the migration of crude oil from the matrix to the fractures and wellbore. Because the oil phase transport process between matrix pores and fractures is influenced by factors such as pressure gradients, concentration gradients, and the heterogeneity of pore structure, lighter components preferentially escape along fractures into the external space, while heavier components remain in the matrix due to their low diffusion rate. The speed of this escape process directly determines the reservoir's activation level, production decline pattern, and the optimization efficiency of sweet spots.

[0003] The characterization of shale oil dispersion capacity by related technologies mostly relies on static experiments or local monitoring methods, which makes it difficult to dynamically capture the spatiotemporal evolution of oil phase dispersion, and especially unable to reveal the heterogeneity of dispersion capacity in different regions within the reservoir.

[0004] Therefore, in laboratory research and engineering practice of shale oil development, there is an urgent need for a testing device that can achieve multi-point, dynamic, and quantitative monitoring of shale oil escape processes under simulated formation pressure-temperature conditions, in order to support reservoir evaluation, fracturing parameter optimization, and development scheme design. Summary of the Invention

[0005] This application provides a shale oil escape testing device.

[0006] This application provides a shale oil escape testing device, including a containment component and a detection component;

[0007] The receiving component is provided with a receiving cavity, which can be used to hold a sample;

[0008] The containment assembly is provided with an inlet and an outlet, both of which are connected to the containment cavity, so that conductive water can displace the shale oil in the sample located in the containment cavity.

[0009] The detection component includes a displacement circuit and a detection circuit; the displacement circuit can apply a voltage to both ends of the sample, and the detection circuit can be used to obtain the resistance change of the sample.

[0010] The aforementioned device can accurately simulate the real formation displacement environment, placing the sample in a real water-bearing and permeable environment, thus ensuring the practicality and reference value of the test structure.

[0011] By detecting the resistance parameters obtained from the circuit, the escape process of shale samples is quantified. This allows for multi-point, dynamic, and quantitative monitoring and characterization of the continuous escape of oil phases from the matrix into the external space, thus providing a direct reflection of the escape characteristics at different displacement stages. Further analysis of the long-term stability of shale oil escape is conducted to assess the reservoir's development potential and risks. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0013] Figure 1 A schematic diagram of the workflow provided for embodiments of this application;

[0014] Figure 2 A schematic diagram of the containment component structure of the shale oil escape testing device provided in the embodiments of this application;

[0015] Figure 3 A schematic diagram of the cavity structure of the shale oil escape testing device accommodating the components provided in this application embodiment;

[0016] Figure 4 A schematic top view of the cavity housing the components of the shale oil escape testing device provided in this embodiment of the application;

[0017] Figure 5 A right-side schematic view of the shale oil escape testing device housing components provided in an embodiment of this application;

[0018] Figure 6 For along Figure 5 A schematic diagram of a sectional view after the section line has been cut open;

[0019] Figure 7 This is a schematic diagram of the cover plate structure provided in an embodiment of this application;

[0020] Figure 8 for Figure 7 Enlarged schematic diagram of structure B in the diagram;

[0021] Figure 9 This is a bottom view schematic diagram of the cover plate structure provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10 - Contains components;

[0024] 100 - Main body; 101 - Receiving cavity;

[0025] 110 - Water outlet plate; 111 - Water outlet; 112 - Upper nut; 130 - Cover plate; 131 - Water inlet; 132 - Lower nut; 140 - Inspection piece; 151 - Upper washer; 152 - Lower washer;

[0026] 200 - Water distribution structure; 210 - Flow channel; 220 - Connecting port;

[0027] 300 - Detection component; 310 - Displacement circuit; 311 - Power supply; 320 - Detection circuit;

[0028] 410 - Water storage tank; 420 - Constant pressure pump; 431 - First pressure gauge; 432 - Second pressure gauge; 440 - Back pressure valve; 450 - Wastewater tank; 460 - Data processing and control unit.

[0029] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0031] The characterization of shale oil dispersion capacity by related technologies mostly relies on static experiments or local monitoring methods, which makes it difficult to dynamically capture the spatiotemporal evolution of oil phase dispersion, and especially unable to reveal the heterogeneity of dispersion capacity in different regions within the reservoir.

[0032] Therefore, in laboratory research and engineering practice of shale oil development, there is an urgent need for a testing device that can achieve multi-point, dynamic, and quantitative monitoring of shale oil escape processes under simulated formation pressure-temperature conditions, in order to support reservoir evaluation, fracturing parameter optimization, and development scheme design.

[0033] This application provides a shale oil emission testing device, including a housing component 10 and a detection component 300.

[0034] The receiving assembly 10 is provided with a receiving cavity 101, which can be used to contain a sample. The receiving assembly 10 is provided with an inlet 131 and an outlet 111, both of which are connected to the receiving cavity 101 so that conductive water can displace the shale oil in the sample located in the receiving cavity 101.

[0035] The detection component 300 includes a displacement circuit 310 and a detection circuit 320; the displacement circuit 310 can apply a voltage to both ends of the sample, and the detection circuit 320 can be used to obtain the resistance change of the sample.

[0036] The shale oil spill testing device provided in this application can accurately simulate the real formation displacement environment, placing the sample in a realistic water-bearing and permeable environment, thus ensuring the practicality and reference value of the test structure. Further analysis of the long-term stability of shale oil spills is possible to assess the reservoir's development potential and risks.

[0037] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0038] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0039] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0040] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0044] Please refer to Figure 1 This application provides a shale oil spill detection device, including a housing component 10 and a detection component 300.

[0045] Figure 2 This is a schematic diagram of the housing component 10 of the shale oil escape testing device provided in this application embodiment. Figure 3 This is a schematic diagram of the cavity structure of the shale oil escape testing device housing component 10 provided in an embodiment of this application. Figure 3 As shown, the receiving component 10 is provided with a receiving cavity 101, which can be used to contain a sample.

[0046] Figure 5 A right-side schematic view of the shale oil escaping test device housing assembly 10 provided in an embodiment of this application; Figure 6 For along Figure 5 A schematic diagram of a sectional view after the section line has been cut open. For example... Figure 6 As shown, the container assembly 10 is provided with an inlet 131 and an outlet 111, both of which are connected to the container cavity 101 so that conductive water can displace the shale oil in the sample located in the container cavity 101.

[0047] Please refer to Figure 1 The detection component 300 includes a displacement circuit 310 and a detection circuit 320; the displacement circuit 310 can apply a voltage to both ends of the sample, and the detection circuit 320 can be used to obtain the resistance change of the sample.

[0048] By detecting the resistance parameters obtained from circuit 320, the shale oil escape process is quantified. This allows for multi-point, dynamic, and quantitative monitoring and characterization of the continuous escape of the oil phase from the matrix into the external space, thus providing a direct reflection of the escape characteristics at different displacement stages. Further analysis of the long-term stability of shale oil escape is conducted to assess the reservoir's development potential and risks.

[0049] In one possible implementation, the main body 100 is provided with a cover plate 130, which is detachably connected to the main body 100 via a lower nut 132, and the water inlet 131 is located on the cover plate 130. Optionally, the shape of the main body 100 can be square or cylindrical, etc., and this application does not limit this. Preferably, the structure of the main body 100 is integrally injection molded from polyetheretherketone (PEEK) insulating material, and the cover plate 130 is made of stainless steel. By providing the cover plate 130, it is convenient for the loading, unloading, and fixing of samples, and improves the sealing performance and versatility of the device.

[0050] In one possible implementation, the receiving component 10 includes a body 100 and a water-dividing structure 200; the body 100 is provided with a receiving cavity 101; the receiving cavity 101 is used to receive a sample.

[0051] The water distribution structure 200 is disposed between the cover plate 130 and the main body 100. The first surface of the water distribution structure 200 faces the receiving cavity 101, and the second surface of the water distribution structure 200 faces the water inlet 131. This ensures that the water flow is fully distributed by the water distribution structure 200 before contacting the sample, thereby ensuring uniform water distribution, reducing the center-edge pressure drop difference, and suppressing fingering.

[0052] In one possible implementation, the water distribution structure 200 is provided with a plurality of flow channels 210, the first end of the flow channel 210 is corresponding to the water inlet 131, and the second end of the flow channel 210 extends toward the edge of the water distribution structure 200.

[0053] Figure 4 This is a schematic top view of the cavity housing component 10 of the shale oil escape testing device provided in this application embodiment. Please refer to... Figure 4 The flow channel 210 structure can be configured as four flow channels 210, with one end of the flow channel 210 corresponding to the inlet 131, and the other end of the flow channel 210 extending toward the center of the edge of the receiving cavity 101.

[0054] By setting up four flow channels 210, the concentrated water intake is transformed into a uniform edge diffusion flow, completely eliminating local high-pressure areas. At the design level of flow channel 210, the goal of reducing the center-edge pressure drop difference and suppressing fingering is achieved.

[0055] Figure 7 This is a schematic diagram of the cover plate 130 provided in an embodiment of this application. Figure 8 for Figure 7 An enlarged schematic diagram of structure B in the image, as shown below. Figure 7 , Figure 8 As shown, the water distribution structure 200 is provided with multiple connecting ports 220, which are evenly arranged and communicate with the receiving cavity 101 to achieve uniform distribution and stable delivery of fluid, allowing the fluid to enter the sample uniformly while reducing erosion and protecting the sample end face. For example, a lower gasket 152 is provided at the connection between the water distribution structure 200 and the main body 100 to ensure sealing.

[0056] Figure 9 This is a bottom view schematic diagram of the cover plate 130 structure provided in an embodiment of this application, as shown below. Figure 9 As shown, the inlet 131 is located in the middle of the cover plate 130, and the diameter of the inlet 131 is smaller than the cross-sectional area of ​​the receiving cavity 101; this ensures that the fluid forms a stable buffer in the receiving cavity 101 and is then evenly distributed to each connecting port 220.

[0057] Please refer to Figures 7-9 The water distribution structure 200 is provided with a central part, which is positioned opposite to the water inlet 131; the first ends of multiple flow channels 210 are connected to the central part, and the multiple flow channels 210 are evenly arranged relative to the central part, further enhancing the uniformity and stability of fluid distribution.

[0058] Figure 5 This is a right-side schematic diagram of the shale oil escape testing device housing assembly 10 provided in an embodiment of this application, as shown below. Figure 5 As shown, the main body 100 is provided with a water outlet plate 110, which is set on the side of the main body 100 away from the cover plate 130 by an upper nut 112; its function is to improve the rigidity and sealing of the overall structure and prevent external impurities from entering the receiving component 10.

[0059] Figure 2 This is a schematic diagram of the structure of the housing component 10 of the shale oil escape testing device provided in the embodiments of this application, as shown below. Figure 2 As shown, the water outlet 111 is located on the water outlet plate 110. The water outlet 111 and the water inlet 131 are arranged opposite each other along the axial direction of the receiving cavity 101 to ensure efficient utilization of the internal space of the receiving cavity 101. Please refer to... Figure 3 To further improve the sealing performance of the device, an upper gasket 151 is provided between the water outlet plate 110 and the main body 100.

[0060] Please refer to Figure 1 In one possible implementation, the displacement circuit 310 includes a power supply 311, a first output terminal and a second output terminal. The first output terminal is disposed on the inner wall of the receiving cavity 101, and the second output terminal is disposed on the inner wall of the receiving cavity 101. The first output terminal and the second output terminal can apply voltage to the sample.

[0061] By constructing a current conduction loop through two output terminals, a stable and controllable driving force is provided for the displacement process, enabling directional displacement of the sample.

[0062] In one possible implementation, the first output terminal is disposed on the same side of the inlet 131 in the receiving cavity 101, and the second output terminal is disposed on the same side of the outlet 111 in the receiving cavity 101. A directional driving field consistent with the fluid flow direction is constructed, allowing the circuit displacement force and the natural fluid flow channel 210 to work synergistically, thereby improving displacement efficiency and uniformity.

[0063] Please refer to Figures 1-2 The detection circuit 320 includes a circuit body and multiple detection elements 140. The multiple detection elements 140 are disposed in the receiving assembly 10, and at least a portion of the detection elements 140 are located in the receiving cavity 101. The detection elements 140 can acquire the resistance change of the sample. The resistance data at different positions are collected in real time, thereby accurately monitoring the state change of the sample in the receiving cavity 101, and providing data feedback and control basis for the displacement process.

[0064] Please refer to Figure 1 The circuit body is positioned outside the receiving component 10 to prevent direct contact between the circuit body and the fluid medium inside the receiving cavity 101. The circuit body is configured as an electronic device capable of simultaneously detecting the resistance of multiple sensing elements 140, such as a high-resistance voltage acquisition device. This design is suitable for scenarios requiring long-term monitoring of multiple sensing elements 140 in this embodiment, significantly improving measurement efficiency. The circuit body is detachably connected to the sensing elements 140, facilitating the replacement of the sensing elements 140 and achieving the effects of convenient maintenance and reduced operating costs.

[0065] like Figure 1 As shown, the input terminal of the main circuit is directly electrically connected to the signal output terminal of the detection element 140. For the output terminal of the main circuit, this embodiment adopts a centralized grounding connection. For example, the cover plate 130 terminal is an integrated metal conductive terminal of the device, which is connected to the cover plate 130 terminal through the lower nut 132, serving as the common grounding electrode of the entire test device, ensuring that the voltage of all detection elements 140 is measured under the same reference.

[0066] Please refer to Figure 2 , Figure 3 Multiple detectors 140 are arranged in multiple rows and columns to construct a two-dimensional monitoring grid for the sample state within the cavity 101, thereby achieving precise monitoring of the sample resistance change over the entire range.

[0067] Multiple detectors 140 are evenly arranged and electrically connected to multiple regions of the sample. Each detector 140 corresponds to a monitoring unit on the side of the sample. This ensures comprehensive and consistent monitoring of the sample status within the receiving cavity 101, providing reliable quantitative data support for the displacement process.

[0068] In one possible implementation, the detection element 140 is configured as an electrode rod structure, with 10×10 holes formed along the height and width directions on the sidewall of the cavity 101 of the main body 100. Electrode rods are installed in the holes, with the inner end face of each electrode rod flush with the sample and the outer end connected to a wire to form a side monitoring electrode array. Graphite is preferably used as the electrode rod material to meet the conductivity requirements of the electrode rod and reduce costs.

[0069] In one possible implementation, please refer to Figure 1 The water storage tank 410, constant pressure pump 420, and pressure gauge 430 are connected sequentially to the inlet 131 of the receiving component 10, and the pressure gauge 430, back pressure valve 440, and water storage tank 410 are connected sequentially to the outlet 111 of the receiving component 10. The data processing and control unit 460 is then connected to the circuit body, pressure gauge 430, constant pressure pump 420, and back pressure valve 440 via signal lines.

[0070] The method of using the shale oil emission testing device provided in this application includes the following steps:

[0071] 1. Sample preparation (S101-S102);

[0072] S101: Select fresh shale and process it into a cubic sample that fits the 10-cavity housing component. After washing with deionized water, dry it at 60℃ for 24 hours, and weigh the dry weight. .

[0073] S102: Place the dried sample in a vacuum saturation device and evacuate it. Under vacuum, inject simulated crude oil or formation crude oil until the sample is completely submerged and its mass no longer increases. Remove the sample, wipe the surface dry, and weigh the saturated oil. .

[0074] 2. Equipment assembly (S103-S104);

[0075] S103: Place the lower gasket 152, the water separation structure 200 and the sample in sequence on the cover plate. After aligning the receiving cavity 101, assemble the main body 100 and the water outlet plate 110 so that the upper and lower end faces of the sample are sealed with the upper gasket 151 and the lower gasket 152 respectively, and the side wall is attached to the main body 100 to form a sealed sample cavity.

[0076] S104: Inspect the test piece 140, ensuring that the inner end face of the test piece 140 is flush with or slightly pressed against the side of the sample, and that the outer end is led out to the circuit body via a wire.

[0077] 3. System connection (S105-S106);

[0078] S105: Connect the outlet 111 to the inlet of the back pressure valve 440, and connect the outlet of the back pressure valve 440 to the wastewater tank 450 via the second pressure gauge 432; connect the inlet 131 of the cover plate 130 to the outlet of the constant pressure pump 420 via the water pipe and the first pressure gauge 431, and connect the inlet of the constant pressure pump 420 to the water storage tank 410, and confirm that the sealing of each pipeline is reliable.

[0079] S106: The positive terminal of the power supply 311 is connected to the outlet plate 110 terminal, and the negative terminal is connected to the cover plate 130 terminal; the output terminal of the main circuit is connected to the cover plate 130 terminal, and the input terminal is connected to the side detection component 140; the main circuit, constant pressure pump 420, power supply 311 and data processing and control unit 460 are connected through signal lines.

[0080] 4. Displacement and resistance testing (S107-S111).

[0081] S107: Inject conductive water into the water storage tank, purge air from the pipeline, and adjust the back pressure valve 440 to the target back pressure. When the constant pressure pump 420 stops, check the system for leaks.

[0082] S108: Start the detection circuit 320 and data processing and control unit 460, set the sampling time interval and total recording time; turn on the power supply 311 and set the constant current I, and record the initial resistance of each detection element 140. .

[0083] S109: Start the constant pressure pump 420 and adjust the inlet pressure to... This creates a stable pressure difference across the sample. This allows conductive water to displace shale oil from bottom to top; it keeps the operating status of each device constant, continuously records the potential changes of each monitoring electrode, and synchronously records the inlet pressure, outlet pressure, and flow rate.

[0084] S110: In the initial stage of displacement, the equivalent resistance at each monitoring point decreases with time. After a sufficiently long displacement period, the resistance tends to stabilize. .

[0085] S111: When and When the change is less than the preset threshold for a continuous period of time, the system is determined to have reached a quasi-stable state, the constant pressure pump 420 and the constant current source are stopped, and the test ends.

[0086] 5. Quantitative characterization of data processing and dissipation capabilities.

[0087] S112: Resistance-time curves of each detection element 140 detected by the detection component 300 throughout the entire displacement period. To eliminate the influence of initial resistance differences at different locations, normalization was performed on each monitoring point:

[0088] ,in ;

[0089] The initial resistance, This is the resistance during the stable phase.

[0090] S113: During displacement and dissipation processes It decreases monotonically over time, exhibiting an approximately exponential decay trend, and can be approximated as a single exponential function:

[0091]

[0092] in For monitoring points Resistance attenuation coefficient (unit: This reflects how quickly the normalized resistance value decays over time. The starting time (in seconds).

[0093] Taking the natural logarithm of both sides of the above single exponential function, we get:

[0094]

[0095] Select The time interval with monotonically decreasing and good fitting effect is... The relationship is fitted using least-squares linear fitting, and the fitting formula is as follows:

[0096]

[0097] in, The intercept constant obtained is used for fitting accuracy and is not involved in the evaluation of dissipation capability; the absolute value of the fitting slope is the attenuation coefficient. .

[0098] monitoring points The dissipation capacity index is defined as follows: Shale oil runoff capacity is measured by the exponential decay coefficient of normalized resistance. The larger the diameter, the higher the rate at which the non-conductive oil phase in the pores at that location is replaced by conductive water and escapes laterally, and the stronger the shale oil's escape capability; conversely, The smaller the value, the slower the dissipation process and the weaker the dissipation capacity. (Data from various monitoring points is available.) The arithmetic mean or weighted average is used as a comprehensive evaluation index of the overall evaporation capacity of the sample.

[0099] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0100] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of embodiments suitable for specific application considerations.

Claims

1. A shale oil escape testing device, characterized in that, It includes a receiving component (10) and a detection component (300); the receiving component (10) is provided with a receiving cavity (101) which can be used to hold a sample; The container assembly (10) is provided with an inlet (131) and an outlet (111), both of which are connected to the container cavity (101) so that conductive water can displace the shale oil in the sample located in the container cavity (101). The detection component (300) includes a displacement circuit (310) and a detection circuit (320); the displacement circuit (310) can apply a voltage to both ends of the sample, and the detection circuit (320) can be used to obtain the resistance change of the sample.

2. The shale oil escape testing device according to claim 1, characterized in that, The receiving component (10) includes a main body (100) and a water distribution structure (200). The main body (100) is provided with the receiving cavity (101); The water distribution structure (200) is disposed on the main body (100), and the water distribution structure (200) is connected to the water inlet (131). The water distribution structure (200) is used to divert the conductive water from the water inlet (131) to different areas of the receiving cavity (101).

3. The shale oil escape testing device according to claim 2, characterized in that, The main body (100) is provided with a cover plate (130), the cover plate (130) is detachably connected to the main body (100), and the water inlet (131) is located on the cover plate (130). The water distribution structure (200) is disposed between the cover plate (130) and the main body (100), with the first surface of the water distribution structure (200) facing the receiving cavity (101) and the second surface of the water distribution structure (200) facing the water inlet (131).

4. The shale oil escape testing device according to claim 3, characterized in that, The water distribution structure (200) is provided with a plurality of flow channels (210), the first end of the flow channel (210) is provided corresponding to the water inlet (131), and the second end of the flow channel (210) extends toward the edge of the water distribution structure (200); The water distribution structure (200) is provided with multiple connecting ports (220), which are evenly arranged and connected to the receiving cavity (101).

5. The shale oil escape testing device according to claim 4, characterized in that, The inlet (131) is located in the middle of the cover plate (130), and the diameter of the inlet (131) is smaller than the cross-sectional area of ​​the receiving cavity (101). The water distribution structure (200) is provided with a central part, which is disposed opposite to the water inlet (131); the first ends of the plurality of flow channels (210) are connected to the central part, and the plurality of flow channels (210) are evenly arranged relative to the central part.

6. The shale oil escape testing device according to claim 3, characterized in that, The main body (100) is provided with a water outlet plate (110), which is located on the side of the main body (100) away from the cover plate (130); The outlet (111) is disposed on the outlet plate (110), and the outlet (111) and the inlet (131) are disposed opposite to each other along the axial direction of the receiving cavity (101).

7. The shale oil escape testing device according to any one of claims 1-6, characterized in that, The displacement circuit (310) includes a power supply (311), a first output terminal, and a second output terminal; The first output terminal is disposed on the inner wall of the receiving cavity (101), and the second output terminal is disposed on the inner wall of the receiving cavity (101). The first output terminal and the second output terminal can apply voltage to the sample.

8. The shale oil escape testing device according to claim 7, characterized in that, The first output end is disposed on the same side as the water inlet (131) in the receiving cavity (101), and the second output end is disposed on the same side as the water outlet (111) in the receiving cavity (101).

9. The shale oil escape testing device according to any one of claims 1-6, characterized in that, The detection circuit (320) includes a circuit body and multiple detection components (140); A plurality of the detection elements (140) are disposed in the receiving assembly (10), at least a portion of the detection elements (140) being located within the receiving cavity (101), and the detection elements (140) being capable of acquiring the resistance change of the sample; The circuit body is disposed outside the receiving component (10), and the circuit body is detachably connected to the detection element (140); when the circuit body is connected to the detection element (140), the circuit body can be electrically connected to the sample through the detection element (140).

10. The shale oil escape testing device according to claim 9, characterized in that, Multiple of the aforementioned detection elements (140) are arranged in multiple rows and columns; The plurality of the detection elements (140) are evenly arranged and can be electrically connected to multiple regions of the sample.

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