CN119001127A - Shale spontaneous imbibition evaluation device and method - Google Patents
Shale spontaneous imbibition evaluation device and method Download PDFInfo
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- CN119001127A CN119001127A CN202411175156.3A CN202411175156A CN119001127A CN 119001127 A CN119001127 A CN 119001127A CN 202411175156 A CN202411175156 A CN 202411175156A CN 119001127 A CN119001127 A CN 119001127A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- 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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- 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
- G01N35/00584—Control arrangements for automatic analysers
- G01N35/0092—Scheduling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
- G01N2001/2886—Laser cutting, e.g. tissue catapult
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Abstract
本发明提供了一种页岩自发渗吸评价装置及方法，属于页岩开发技术领域。本发明评价装置包括切割区、烘干区、饱和区、涂胶区、渗吸区以及计算机控制系统；根据实验要求通过计算机控制系统控制样品在切割区、烘干区、饱和区、涂胶区、渗吸区进行切割、烘干、饱和和涂胶，能够在一个装置上完成全部实验过程，减少了样品转移和处理过程中的误差，增加了样品的使用率，提高了实验的准确性和可对比性。
The present invention provides a shale spontaneous imbibition evaluation device and method, belonging to the technical field of shale development. The evaluation device of the present invention comprises a cutting area, a drying area, a saturation area, a glue coating area, an imbibition area and a computer control system; according to the experimental requirements, the computer control system controls the cutting, drying, saturation and gluing of samples in the cutting area, the drying area, the saturation area, the glue coating area and the imbibition area, and the entire experimental process can be completed on one device, reducing the errors in the sample transfer and processing process, increasing the sample utilization rate, and improving the accuracy and comparability of the experiment.
Description
Technical Field
The invention relates to the technical field of shale development, in particular to a shale spontaneous imbibition evaluation device and method.
Background
Shale oil gas exists in micro-nano scale pores in organic matters and inorganic minerals mainly in an adsorption state, so that connectivity of shale reservoir pore structures plays a vital role in effective production of shale oil gas. And spontaneous permeability can evaluate the permeability of the shale reservoir, and analyze the pore structure and pore connectivity of the reservoir. In addition, the development scheme of shale oil gas can be optimized through spontaneous imbibition, including the arrangement of horizontal wells, the optimization of fracturing technology and the adjustment of production operation, so that the development efficiency and the production benefit are improved.
At present, research and development of spontaneous imbibition equipment are carried out, but a plurality of instruments are often needed to cooperate to complete spontaneous imbibition experiments, including sample cutting, gluing, imbibition, mechanical property testing and the like, which not only consumes time and labor, but also is difficult to ensure timeliness of each link. In addition, pore connectivity is currently being accomplished by developing spontaneous imbibition analysis requiring multiple samples, but due to the difficulty in sampling shale samples and the strong heterogeneity, the cost of spontaneous imbibition experiments is increased and the comparability of the experiments is reduced. In addition, since spontaneous imbibition is significant for shale oil and gas reservoir evaluation and development, such as the influence of imbibition on reservoir strength during well-tie. However, the current spontaneous imbibition device has a single function, which limits the deep understanding and application of the complex imbibition phenomenon. If the spontaneous imbibition experiment is carried out by locking a sample on a spontaneous imbibition experimental instrument when the spontaneous imbibition experiment is carried out, heating the sample by a heating device to enable the temperature of the sample to reach a preset value, adding solutions with different concentrations according to an experimental scheme, measuring the time, the concentration and the temperature after the experiment starts, carrying out pressure test on the shale reservoir by adopting a high-pressure measuring system, observing the osmotic pressure and the wettability performance of the shale reservoir, carrying out crude oil adsorption experiment by an oil saturation device, and observing the influence of various solutions on the shale reservoir. In the experiment, a proper sample needs to be prepared, and the operations of cutting, drying, saturating and gluing the sample are needed, so that the spontaneous imbibition experiment process needs a plurality of independent steps and a plurality of devices to complete sample preparation and testing, and meanwhile, a plurality of samples are needed to complete the spontaneous imbibition experiment, and the sample needs to be transferred and processed for a plurality of times, which is time-consuming and easy to generate errors.
Disclosure of Invention
Aiming at the problems of the prior art, the invention provides the shale spontaneous imbibition evaluation device, which integrates a plurality of experimental devices of cutting, drying, saturation, gluing and imbibition, can develop a multifunctional spontaneous imbibition experiment on the same sample, reduces errors in the sample transferring and processing processes, increases the use ratio of the sample, and improves the accuracy and the comparability of the experiment.
The invention provides a shale spontaneous imbibition evaluation device which comprises a cutting area, a drying area, a saturation area, a gluing area, an imbibition area and a computer control system, wherein the cutting area is used for cutting shale; the cutting area, the drying area, the gluing area and the imbibition area are sequentially arranged, and the saturation area is adjacent to the drying area;
The cutting area is provided with a first opening and closing door, a second opening and closing door, a cutting assembly and a conveying assembly; the transport assembly is capable of moving the sample; the computer control system is connected with the transportation assembly and the cutting assembly;
The drying area is connected with the cutting area through a second opening and closing door; the drying area is provided with a first transportation channel, a drying assembly and a fourth opening and closing door; the drying assembly is arranged below the first transportation channel, and the drying assembly and the first transportation channel are both connected with the computer control system;
The gluing area is provided with a second transportation channel, a positioning device, a triaxial moving assembly, a gluing assembly, a third opening and closing door and a sixth opening and closing door, the positioning device is connected with the triaxial moving assembly, and the positioning device is arranged on the gluing assembly; the positioning device and the triaxial moving assembly are connected with the computer control system; the drying area is connected with the gluing area through a third opening and closing door, the second transportation channel can move samples from the third opening and closing door to the gluing assembly, and the sixth opening and closing door is arranged below the second transportation channel;
the seepage and suction area is provided with a fifth opening and closing door and a seepage and suction experimental device, and the transport assembly can move samples from the gluing area to the seepage and suction area through the fifth opening and closing door;
the saturation region is provided with a seventh opening and closing door, and the saturation region is provided with a container for containing water.
Preferably, the transport assembly comprises a telescopic arm and an automatic control clamp, both of which are connected to the computer control system.
Preferably, a weight sensor is arranged on the telescopic arm.
Preferably, the cutting area is further provided with a solenoid valve, one end of the solenoid valve is connected with a gas supply source, and the other end of the solenoid valve is connected with the cutting assembly for controlling cutting precision and speed.
Preferably, the cutting assembly comprises a laser cutting machine and a carrying platform, and the laser cutting machine is connected with the computer control system.
Preferably, a waste collection area is arranged below the carrying platform, and a waste collector is also arranged on the side of the carrying platform.
Preferably, the drying assembly comprises a heater, a first temperature sensor, a humidity controller and an air pump, wherein the heater, the temperature controller and the air pump are all connected with the computer control system, the heater is arranged below the first transportation channel, the first temperature sensor is connected with the first transportation channel, and the heater is connected with the temperature controller.
Preferably, the gluing assembly comprises a gluing die, a movable operating platform and a glue transmission assembly, wherein the glue transmission assembly comprises a glue tank, a glue pump, a glue storage tank, a glue guide pipe, a glue cylinder, a pressing sheet and a glue pipe which are sequentially connected, a piston is arranged in the glue storage tank, the movable operating platform is arranged below the glue pipe, and the gluing die is arranged on the movable operating platform.
Preferably, a first liquid level sensor and a pressure detector are further arranged on the glue storage tank.
Preferably, a safety valve is also arranged above the glue storage tank.
Preferably, the glue reservoir is further connected with a first solution supply.
Preferably, the glue tanks are two, the glue pump is connected with one of the glue tanks, a mixing stirrer is arranged between the two glue tanks, the two glue tanks are both connected with the inlet of the mixing stirrer, one end of the first solution supply device is connected with the outlet of the mixing stirrer, and the other end of the first solution supply device is connected with the glue storage tank.
Preferably, the positioning device comprises a position sensor and a directional control valve, and the directional control valve is connected with the triaxial moving assembly.
Preferably, the three-axis moving assembly comprises an X-direction moving axis, a Y-direction moving axis and a Z-direction moving axis, the X-direction moving axis, the Y-direction moving axis and the Z-direction moving axis are perpendicular to each other, and the gluing die can move along the three-axis moving assembly.
Preferably, the gluing mould is hexahedron, and the inside of every face all is filled with the heating plate, the inside of gluing mould is the cavity, is equipped with first injecting glue mouth, second injecting glue mouth, third injecting glue mouth and fourth injecting glue mouth on upper wall, diapire and two relative lateral walls, first injecting glue mouth the second injecting glue mouth third injecting glue mouth with fourth injecting glue mouth is connected with a rubber tube respectively first injecting glue mouth the second injecting glue mouth third injecting glue mouth with fourth injecting glue mouth is equipped with first control shaft, second control shaft, third control shaft and fourth control shaft respectively.
Preferably, the imbibition experimental device comprises a spontaneous imbibition heat-preserving moisture-sealing system, wherein the spontaneous imbibition heat-preserving moisture-sealing system comprises a shell, a soft connecting rod, a sample rotating clamp, a thermostat, a humidifier, a first analytical balance, a second analytical balance, an imbibition vessel, a second liquid level sensor, an acoustic energy converter, a sample cabinet, a second temperature sensor and a humidity sensor, wherein the soft connecting rod, the sample rotating clamp, the thermostat, the humidifier, the first analytical balance, the second analytical balance, the imbibition vessel, the second liquid level sensor, the acoustic energy converter, the sample cabinet, the second temperature sensor and the humidity sensor are arranged in the shell; the humidity sensor and the second temperature sensor are arranged on the side wall of the shell, and the soft connecting rod, the sample rotating clamp, the thermostat, the humidifier, the first analytical balance, the second analytical balance, the percolating vessel, the second liquid level sensor, the acoustic energy converter and the sample cabinet are all arranged in the shell;
The first analytical balance is connected with the sample cabinet through a soft connecting rod, the sample rotating clamp and the acoustic energy converter are arranged in the sample cabinet, the sample clamp is further arranged in the sample cabinet, the humidifier and the thermostat are arranged at the bottom or on the side wall of the shell, the second analytical balance is arranged at the bottom of the shell, the dialysis vessel is arranged above the second analytical balance, and a second liquid level sensor is arranged in the dialysis vessel;
The infiltration vessel is also connected with a water supplementing groove and an oil supplementing groove, the water supplementing groove is connected with the infiltration vessel through a second solution supply device, and the oil supplementing groove is connected with the infiltration vessel through a third solution supply device.
The invention also provides a shale spontaneous imbibition evaluation method, which uses the shale spontaneous imbibition evaluation device and comprises the following steps:
Preparing a sequential imbibition sample;
Performing sequential infiltration;
preparing a penetrating imbibition sample;
Performing penetrating permeation;
Preparing samples with different saturation;
and carrying out sequential imbibition and cross-layer imbibition on samples with different saturation, and carrying out data processing after sequential imbibition and cross-layer imbibition to obtain imbibition indexes and mechanical parameters under different imbibition paths.
Preferably, the sequential imbibition sample preparation process comprises:
Measuring the weight and size of the sample;
Sequentially drying the samples in a drying area, and gluing in a gluing area;
And carrying out ultrasonic velocity measurement on the glued sample to obtain initial mechanical parameters of the sample before carrying out the forward osmosis experiment.
Preferably, the sequential imbibition process comprises:
measuring parameters of a sequential imbibition sample;
carrying out sequential imbibition on the sequential imbibition sample in the imbibition region;
the transverse and longitudinal wave velocities and the weight changes before and after imbibition were measured.
Preferably, the process for preparing the transhipment imbibition sample comprises the following steps:
Sequentially drying the samples in a drying area, and gluing in a gluing area;
carrying out laser cutting on the glued sample according to the set index of the penetrating and sucking sample;
and carrying out ultrasonic velocity measurement on the cut sample to obtain initial mechanical parameters of the sample before carrying out a penetration and imbibition experiment.
Preferably, the transhipment imbibition process comprises:
measuring parameters of the penetrating imbibition sample;
carrying out penetrating imbibition on the penetrating imbibition sample in the imbibition area;
the transverse and longitudinal wave velocities and the weight changes before and after imbibition were measured.
Preferably, the different saturation sample preparation process comprises:
sequentially drying different samples in a drying area, and gluing in a gluing area;
carrying out laser cutting on different samples after gluing according to set sample indexes with different saturation;
Soaking the cut different samples in a saturation region according to set sample indexes with different saturation degrees to obtain samples with different saturation degrees;
And carrying out ultrasonic velocity measurement on the samples with different saturation degrees to obtain mechanical parameters of the samples with different saturation degrees before carrying out the sequential permeation and absorption experiments and the penetrating permeation and absorption experiments.
Preferably, samples with different saturation degrees are subjected to sequential imbibition and cross-layer imbibition, and data processing after sequential imbibition and cross-layer imbibition is carried out to obtain imbibition indexes and mechanical parameters under different imbibition paths, and the method specifically comprises the following steps:
Carrying out sequential imbibition on samples with different saturation in an imbibition area, and measuring the transverse wave speed, the longitudinal wave speed and the weight change before and after imbibition;
Carrying out penetrating imbibition on samples with different saturation in an imbibition area, and measuring the transverse wave speed, the longitudinal wave speed and the weight change before and after imbibition;
and carrying out data processing after sequential imbibition and transhipment imbibition to obtain imbibition indexes and mechanical parameters under different imbibition paths.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) The known shale component sample can be accurately cut through a laser cutting machine, the sample can be transferred between different areas in the device through the opening and closing door, the telescopic hanging arm and the movable object table, the cut sample is transferred to the drying area through the telescopic hanging arm, after drying is finished, the sample is moved to the gluing area through the movable object table, the gluing process is finished, and the glued sample can be used for measuring the imbibition parameters and the mechanical parameters in the imbibition area.
(2) The gluing die is controlled by a computer, the gluing thickness is controllable, the gluing surface is uniform, the phenomenon of little or more coating caused by manual gluing is avoided, and the error caused by the pretreatment process to a spontaneous imbibition experiment is reduced.
(3) The samples used in the experiment are the same samples, so that the influence of factors such as sample density, porosity, size and the like on the spontaneous imbibition experiment is avoided, the difference of fluid migration in different directions can be evaluated through anisotropic imbibition indexes, and a certain cost is saved for shale oil exploitation.
(4) The method can evaluate the influence of the bedding and penetrating water seepage on the compressive strength of the sample by using the same sample, further analyze the mechanical weakening effects of the water on the sample in different directions, and provide technical guidance for the design of the horizontal well.
(5) The water content of the sample is automatically controlled by the computer, so that the influence of human factors on experiments is avoided, and the influence of the initial water content on spontaneous imbibition of the reservoir can be clearly observed through imbibition indexes under different initial water content conditions, so that a certain guide is provided for reservoir exploitation and development.
Drawings
Fig. 1 is a schematic diagram of an experimental device for evaluating spontaneous shale imbibition according to an embodiment of the invention.
Fig. 2 is a schematic perspective view of a wicking zone in accordance with an embodiment of the invention.
Fig. 3 is a schematic front view of a wicking zone according to an embodiment of the invention.
Fig. 4 is a schematic left-hand view of a wicking zone in accordance with an embodiment of the invention.
Fig. 5 is a schematic top view of a wicking zone according to an embodiment of the invention.
Fig. 6 is a longitudinal cross-sectional view of a gumming die of one embodiment of the present invention.
Fig. 7 is a technical roadmap of a shale spontaneous imbibition evaluation method according to an embodiment of the invention, and in the same experiment, some steps can be considered to be completed in one process, so that arrows are not drawn in the figure, for example: the parameter measurements include transverse and longitudinal wave velocities and weight variations.
In the figure, a first opening and closing door, a second opening and closing door, a third opening and closing door, a fourth opening and closing door, a fifth opening and closing door, a sixth opening and closing door, a seventh opening and closing door, a 8-laser cutting machine, a 9-carrying platform, a 10-telescopic arm, an 11-automatic control clamp, a first conveying channel, a second conveying channel, a 14-heater, a first 15-temperature sensor, a computer control system, a control valve, a first 18-rubber guide pipe, a pressure detector, a safety valve, a first 21-rubber storage tank, a first 22-liquid level sensor, a piston 23-piston, a rubber pump, a first 25-solution supply, a rubber cylinder, a 27-rubber tank, a mixing stirrer, a pressing sheet, a 30-rubber pipe, a moving operation platform, a 32-Z direction moving axis, a 33-Y direction moving axis, a 34-positioning device, a constant 35-temperature controller, a 36-humidifier, a second 37-38-third water tank, a second 40-liquid level sensor, a second water tank and a water tank, a second water tank, a second 43-filling sensor, a water tank and a water tank; 45-solenoid valve, 46-weight sensor, 47-first analytical balance, 48-second analytical balance, 49-acoustic energy converter, 50-flexible connecting rod, 51-sample cabinet, 52-sample rotating clamp, 53-shell, 54-heating plate, 55-first glue injection port, 56-second glue injection port, 57-third glue injection port, 58-fourth glue injection port, 59-first control shaft, 60-second control shaft, 61-third control shaft, 62-fourth control shaft, 63-waste collector, 64-gas supply source, 65-sample, 66-support rod.
Detailed Description
The following describes the present invention in detail.
The invention provides a shale spontaneous imbibition evaluation device which comprises a cutting area, a drying area, a saturation area, a gluing area, an imbibition area and a computer control system 16, wherein the cutting area is used for cutting shale; the cutting area, the drying area, the gluing area and the imbibition area are sequentially arranged, and the saturation area is adjacent to the drying area;
The cutting area is provided with a first opening and closing door 1, a second opening and closing door 2, a cutting assembly and a conveying assembly; the transport assembly is capable of moving the sample 65; the computer control system 16 is connected to both the transport assembly and the cutting assembly;
The drying area is connected with the cutting area through a second opening and closing door 2; the drying area is provided with a first transportation channel 12, a drying component and a fourth opening and closing door 4; the drying assembly is arranged below the first conveying channel 12, and the drying assembly and the first conveying channel 12 are connected with the computer control system 16;
The gluing area is provided with a second transportation channel 13, a positioning device 34, a triaxial moving assembly, a gluing assembly, a third opening and closing door 3 and a sixth opening and closing door 6, the positioning device 34 is connected with the triaxial moving assembly, and the positioning device 34 is arranged on the gluing assembly; the positioning device 34 and the triaxial moving assembly are both connected with the computer control system 16; the drying area is connected with the gluing area through a third opening and closing door 3, the second transportation channel 13 can move a sample 65 from the third opening and closing door 3 to a gluing component, and the sixth opening and closing door 6 is arranged below the second transportation channel 13;
the imbibition area is provided with a fifth opening and closing door 5 and an imbibition experimental device, and the transport assembly can move the sample 65 from the gluing area to the imbibition area through the fifth opening and closing door 5;
the saturation zone is provided with a seventh shutter 7, and the saturation zone is provided with a container for containing water.
According to one embodiment of the invention, the transport assembly comprises a telescopic arm 10 and an automatic control clamp 11, both the telescopic arm 10 and the automatic control clamp 11 being connected to the computer control system 16.
According to one embodiment of the invention, the telescopic arm 10 is provided with a weight sensor 46.
According to one embodiment of the invention, the cutting zone is further provided with a solenoid valve 45, one end of the solenoid valve 45 being connected to a gas supply 64, the other end of the solenoid valve 45 being connected to the cutting assembly for controlling the cutting accuracy and speed. The solenoid valve 45 is used to control the flow of fluid, and precise control of the fluid flow is achieved by quick opening or closing. In the glue cutting of the surface of shale samples 65, it is very important to ensure the quality of the cut. The use of the solenoid valve 45 to precisely control the supply of assist gas makes it possible to improve the cutting quality and cutting speed by purging the assist gas.
According to one embodiment of the invention, the cutting assembly comprises a laser cutter 8 and a carrier platform 9, the laser cutter 8 being connected to the computer control system 16.
According to a specific embodiment of the invention, a waste collection area is provided below the load floor 9, and a waste collector 63 is also provided laterally of the load floor 9.
According to one embodiment of the present invention, the drying assembly includes a heater 14, a first temperature sensor 15, a humidity controller and an air pump, wherein the heater 14, the temperature controller (not shown) and the air pump (not shown) are all connected to the computer control system 16, the heater 14 is disposed below the first transportation path 12, the first temperature sensor 15 is connected to the first transportation path 12, and the heater 14 is connected to the temperature controller. The suction pump functions to draw moisture from the air, ensuring that the sample 65 can be dried in a dry environment. When the sample 65 is to be dried, the pump is activated to remove moisture from the air and ensure that the air in the drying zone is dry.
According to one embodiment of the invention, the glue coating assembly comprises a glue coating die, a movable operating platform 31 and a glue transmission assembly, wherein the glue transmission assembly comprises a glue tank 27, a glue pump 24, a glue storage tank 21, a glue guide tube 18, a glue cylinder 26, a pressing sheet 29 and a glue tube 30 which are sequentially connected, a piston 23 is arranged in the glue storage tank 21, the movable operating platform 31 is arranged below the glue tube 30, and the glue coating die is arranged on the movable operating platform 31.
According to a specific embodiment of the invention, a first level sensor 22 and a pressure detector 19 are also provided on the glue reservoir 21.
According to a specific embodiment of the invention, a safety valve 20 is also provided above said glue reservoir 21. When the pressure detected by the pressure detector 19 exceeds a preset safety threshold, the safety valve 20 is automatically opened to release redundant pressure and reduce the pressure in the gluing area; when the pressure in the system falls within the safety range, the safety valve 20 will automatically close and the system will return to normal operation.
According to one embodiment of the invention, the glue reservoir 21 is further connected to a first solution supply 25. The first liquid level sensor 22 is used for monitoring the glue amount in the glue storage tank 21, and when the glue amount is lower than the set minimum liquid level, the first liquid level sensor 22 sends a signal to the computer control system 16; after receiving the signal, the computer control system 16 starts the first solution supply device 25 to supply glue to the glue storage tank 21 until reaching a preset liquid level; when the glue level in the glue reservoir 21 reaches the set maximum level, the first level sensor 22 again sends a signal to the computer control system 16, and the computer control system 16 controls the first solution supply 25 to stop working.
According to one embodiment of the present invention, two glue tanks 27 are provided, the glue pump 24 is connected to one of the glue tanks 27, a mixing agitator 28 is disposed between the two glue tanks 27, the two glue tanks 27 are both connected to an inlet of the mixing agitator 28, one end of the first solution supply 25 is connected to an outlet of the mixing agitator 28, and the other end of the first solution supply 25 is connected to the glue storage tank 21. The first solution supply 25 is connected to a mixer 28, and the glue tank 27 is supplied with glue.
To improve the glue performance, the two glue tanks 27 may hold different glues (such as A, B glue), and the glue obtained by mixing the two glue tanks 27 by the mixer 28 may be used; the mixed glue is injected into the glue reservoir 21 through the first solution supply 25 to ensure that there is sufficient glue for the subsequent glue process.
According to one embodiment of the invention, the positioning device 34 comprises a position sensor (not shown) and a directional control valve 17, the directional control valve 17 being connected to the triaxial moving assembly.
According to one embodiment of the present invention, the three-axis moving assembly includes an X-direction moving axis (not shown), a Y-direction moving axis 33, and a Z-direction moving axis 32, the X-direction moving axis, the Y-direction moving axis 33, and the Z-direction moving axis 32 being perpendicular to each other.
According to a specific embodiment of the present invention, the glue coating mold is hexahedral, the inside of each surface is filled with a heating plate 54, the inside of the glue coating mold is a cavity, the upper wall, the bottom wall and two opposite side walls are provided with a first glue injection port 55, a second glue injection port 56, a third glue injection port 57 and a fourth glue injection port 58, the first glue injection port 55, the second glue injection port 56, the third glue injection port 57 and the fourth glue injection port 58 are respectively connected with a glue pipe 30, and the first glue injection port 55, the second glue injection port 56, the third glue injection port 57 and the fourth glue injection port 58 are respectively provided with a first control shaft 59, a second control shaft 60, a third control shaft 61 and a fourth control shaft 62, so that the thickness of glue coating, that is, the glue coating thickness and uniformity can be controlled.
According to one embodiment of the invention, the glue coating die is made of transparent materials (such as PP plastics) which are not easy to adhere by glue such as epoxy resin.
According to one embodiment of the present invention, the first injection port 55, the second injection port 56, the third injection port 57 and the fourth injection port 58 may be opened simultaneously or may be opened separately.
According to one embodiment of the invention, the imbibition experimental device comprises a spontaneous imbibition heat-preserving moisture-sealing system which comprises a shell and a flexible connecting rod 50, a sample rotating clamp 52, a thermostat 35, a humidifier 36, a first analytical balance 47, a second analytical balance 48, an imbibition dish 43, a second liquid level sensor 44, an acoustic energy converter 49, a sample cabinet 51, a second temperature sensor 40 and a humidity sensor 39 which are arranged inside the shell; the humidity sensor 39 and the second temperature sensor 40 are arranged on the side wall of the housing, and the flexible connecting rod 50, the sample rotating clamp 52, the thermostat 35, the humidifier 36, the first analytical balance 47, the second analytical balance 48, the percolating dish 43, the second liquid level sensor 44, the acoustic energy converter 49 and the sample cabinet 51 are all arranged inside the housing;
The first analytical balance 47 is connected with the sample cabinet 51 through a flexible connecting rod 50, the sample rotating clamp 52 and the acoustic energy converter 49 are arranged inside the sample cabinet 51, a sample clamp (not shown in the figure) is also arranged inside the sample cabinet 51, the humidifier 36 and the thermostat 35 are arranged at the bottom or the side wall of the shell, the second analytical balance 48 is arranged at the bottom of the shell, the percolating vessel 43 is arranged above the second analytical balance 48, and a second liquid level sensor 44 is arranged inside the percolating vessel 43;
the infiltration vessel 43 is also connected with a water supplementing tank 41 and an oil supplementing tank 42, the water supplementing tank 41 is connected with the infiltration vessel 43 through the second solution feeder 37, and the oil supplementing tank 42 is connected with the infiltration vessel 43 through the third solution feeder 38.
According to one embodiment of the invention, a support bar 66 is also provided below the first analytical balance 47.
The invention also provides a shale spontaneous imbibition evaluation method, which uses the shale spontaneous imbibition evaluation device and comprises the following steps:
Preparing a sequential imbibition sample;
Performing sequential infiltration;
preparing a penetrating imbibition sample;
Performing penetrating permeation;
Preparing samples with different saturation;
and carrying out sequential imbibition and cross-layer imbibition on samples with different saturation, and carrying out data processing after sequential imbibition and cross-layer imbibition to obtain imbibition indexes and mechanical parameters under different imbibition paths.
According to one embodiment of the invention, the sequential imbibition sample preparation process comprises:
Measuring the weight and size of the sample;
Sequentially drying the samples in a drying area, and gluing in a gluing area;
and carrying out ultrasonic velocity measurement on the glued sample to obtain the mechanical parameters of the sample before carrying out the forward osmosis experiment.
According to one embodiment of the invention, the sequential imbibition process comprises:
measuring parameters of a sequential imbibition sample;
carrying out sequential imbibition on the sequential imbibition sample in the imbibition region;
the transverse and longitudinal wave velocities and the weight changes before and after imbibition were measured.
According to one embodiment of the invention, the process for preparing a through-layer imbibition sample comprises:
Sequentially drying the samples in a drying area, and gluing in a gluing area;
carrying out laser cutting on the glued sample according to the set index of the penetrating and sucking sample;
and carrying out ultrasonic velocity measurement on the cut sample to obtain the mechanical parameters of the sample before carrying out the penetration and imbibition experiment.
According to one embodiment of the present invention, the process of through-layer imbibition comprises:
measuring parameters of the penetrating imbibition sample;
carrying out penetrating imbibition on the penetrating imbibition sample in the imbibition area;
the transverse and longitudinal wave velocities and the weight changes before and after imbibition were measured.
According to one embodiment of the invention, the process for preparing samples of different saturation levels comprises:
sequentially drying different samples in a drying area, and gluing in a gluing area;
carrying out laser cutting on different samples after gluing according to set sample indexes with different saturation;
Soaking the cut different samples in a saturation region according to set sample indexes with different saturation degrees to obtain samples with different saturation degrees;
And carrying out ultrasonic velocity measurement on the samples with different saturation degrees to obtain mechanical parameters of the samples with different saturation degrees before carrying out the sequential permeation and absorption experiments and the penetrating permeation and absorption experiments.
According to a specific embodiment of the invention, samples with different saturation degrees are subjected to sequential imbibition and layer penetration imbibition, and data processing after sequential imbibition and layer penetration imbibition is carried out to obtain imbibition indexes and mechanical parameters under different imbibition paths, and the method specifically comprises the following steps:
Carrying out sequential imbibition on samples with different saturation in an imbibition area, and measuring the transverse wave speed, the longitudinal wave speed and the weight change before and after imbibition;
Carrying out penetrating imbibition on samples with different saturation in an imbibition area, and measuring the transverse wave speed, the longitudinal wave speed and the weight change before and after imbibition;
and carrying out data processing after sequential imbibition and transhipment imbibition to obtain imbibition indexes and mechanical parameters under different imbibition paths.
And (3) carrying out ultrasonic velocity measurement on samples with different saturation degrees after drying treatment, gluing, laser cutting and preparation, and then carrying out sequential imbibition and penetrating imbibition experiments.
The following describes in detail the procedure for performing a imbibition experiment according to one embodiment of the invention:
(1) Experimental device for same sample and different imbibition directions
Firstly, carrying out a sequential spontaneous imbibition experiment:
Cutting: the first opening and closing door is opened, a sample 65 of known shale components is placed on the carrying platform 9, the first opening and closing door 1 is closed, the movement of the telescopic arm 10 is controlled by the computer control system 16, the sample 65 is clamped by the automatic control clamp 11 at the front end of the telescopic arm 10, the sample 65 is moved into the laser cutting machine 8, the cutting position and the cutting size (3 cm multiplied by 3 cm) are set, and after the cutting is completed, the sample 65 is clamped by the telescopic arm 10.
And (3) drying: and opening the second opening and closing door 2, opening the fourth opening and closing door 4, clamping a sample 65 by an automatic control clamp 11 at the front end of the telescopic arm 10, entering a drying area through the first conveying channel 12, closing the second opening and closing door 2 and the fourth opening and closing door 4, regulating the temperature to 60 ℃, and continuously drying for more than 48 hours. The fourth opening and closing door 4 is used for connecting the cutting area and the drying area. After the sample 65 is cut, the second opening and closing door 2 is opened, and the telescopic arm 10 carries the sample 65 to enter the first conveying channel 12; after the second opening and closing door 2 is closed, the fourth opening and closing door 4 is opened until the sample 65 completely enters the drying and saturation region, and then the fourth opening and closing door 4 is closed to maintain the environmental conditions of the drying and saturation region.
Gluing: the third opening and closing door 3 and the sixth opening and closing door 6 are opened through the computer control system 16, the sample 65 is clamped by the automatic control clamp 11 at the front end of the telescopic arm 10 and enters the gluing area through the second conveying channel 13, the sample 65 is placed on the movable operating platform 31, and then the third opening and closing door 3 and the sixth opening and closing door 6 are closed. The sixth opening and closing door 6 is used for connecting the drying area and the gluing area. After the sample 65 is dried, the third opening and closing door 3 is opened through the computer control system 16, and the telescopic arm 10 carries the sample 65 to enter the second transportation channel 13; after closing the third door 3, the sixth door 6 is opened until the sample 65 has completely entered the glue area, and then the sixth door 6 is closed to maintain the environmental conditions of the glue area.
The computer control system 16 controls the direction control valve 17 according to the feedback of the automatic positioning device 34, further controls the X-direction movement axis, the Y-direction movement axis 33 and the Z-direction movement axis 32 to lower the glue coating die to the movable operation platform 31, adjusts the relative positions of the sample 65 and the glue coating die, enables the sample 65 to be positioned at the center of the glue coating die, ensures that the glue coating thicknesses of four surfaces of the sample 65 are consistent during glue coating, puts down the pressing sheet 29 after the positions are adjusted, ensures that the sample 65 cannot move in the glue coating process, adjusts the first control axis 59, the second control axis 60, the third control axis 61 and the fourth control axis 62 through the computer control system 16, determines the glue coating thickness, starts glue injection through the glue pump 24, simultaneously starts the heating sheet 54 to accelerate the curing speed of glue, and can independently control a certain glue injection port to perform glue injection. After waiting for curing for a few minutes, the gluing mould is lifted, the pressing sheet 29 is lifted again, the sample 65 is dried again in the drying area by the telescopic arm 10 and the automatic control clamp 11 through the first conveying channel 12 and the second conveying channel 13, and the drying is continued for more than 48 hours.
The two glue tanks 27 are capable of thoroughly mixing the AB glue by a mixer and then injecting the AB glue into the glue tank 21 through the first solution supply 25.
Imbibition and data measurement, analysis: the fifth door 5 is opened by the computer control system 16 and the sample 65 is placed in the sample holder by the telescopic arm 10, at which point the initial mass m 0 of the sample 65 is recorded using the second analytical balance 48. The transverse and longitudinal wave velocities v 10s and v 10p of the sample 65 in the dry state were measured using an acoustic transducer 49 mounted on the surface of the sample 65. Accordingly, the initial modulus of elasticity of the sample 65 is obtained by averaging the transverse and longitudinal wave velocities measured by each acoustic transducer 49:
Wherein E 10 is the elastic modulus before water absorption of the compliant layer and MPa; ρ is the rock density, g/cm 3; The transverse wave speed before water absorption in the parallel layer is m/s; The longitudinal wave speed before water absorption in the layer is m/s.
The thermostat 35 and the humidifier 36 are adjusted to keep the temperature and humidity of the imbibition area constant, the height of the flexible connecting rod 50 is adjusted to enable the sample 65 to be lowered into the second solution supply 37, and the acoustic transducer 49 can record the transverse and longitudinal wave speeds v 1s and v 1p of the sample 65 in real time. In addition, the dynamic elastic modulus of the sequential imbibition process is expressed as:
Wherein E Cis-cis is the dynamic elastic modulus in the water absorption process of the bedding layer, and Mpa; the transverse wave speed is m/s in the water absorption process of the bedding layer; the longitudinal wave speed is m/s in the water absorption process of the bedding layer.
The elastic modulus of sample 65 affected by the water absorption of the compliant layer can be expressed as:
wherein E Cis-cis s is the modulus of elasticity, MPa, of the sample 65 weakened by the water absorption of the compliant layer.
Then, the weakening index D Cis-cis of the cis-layer water absorption to the sample 65 is:
The forward osmosis test time was t 1 and the real-time mass m 1 of the sample 65 was recorded in combination with the first analytical balance 47 and the second analytical balance 48.
And then carrying out penetrating imbibition:
1) Firstly, preparing a penetrating imbibition sample:
And (3) drying: the computer control system 16 controls the telescopic arm 10 to enable the sample 65 to move to a drying area, the fifth opening and closing door 5 is closed, the temperature is adjusted to 60 ℃ and the drying is continued for more than 48 hours, and the computer control system 16 records that the mass of the sample 65 is m 2 at the moment through a gravity sensor.
Gluing: the fourth, third and sixth opening and closing doors 4, 3 and 6 are opened, the sample 65 is moved to the glue area, and then the fourth, third and sixth opening and closing doors 4, 3 and 6 are closed. The first control shaft 59 and the second control shaft 60, the fourth control shaft 62 and the third control shaft 61 are adjusted, and the other two surfaces of the sample 65 are injected with glue according to the determined glue thickness.
Cutting: after the glue is solidified, the sixth opening and closing door 6, the third opening and closing door 3 and the second opening and closing door 2 are opened, the sample 65 is placed into the laser cutting machine 8, the glue on the two surfaces of the sample 65 is cut off so as to develop penetrating and sucking, and then the corresponding opening and closing doors are closed.
2) Performing penetrating and imbibition:
The second opening and closing door 2, the fourth opening and closing door 4 and the fifth opening and closing door 5 are opened, the sample 65 is placed in the sample clamp through the telescopic arm 10, then the second opening and closing door 2, the fourth opening and closing door 4 and the fifth opening and closing door 5 are closed, the thermostat 35 and the humidifier 36 are adjusted, the temperature and the humidity of a imbibition area are kept constant, the soft connecting rod 50 is controlled to descend the sample 65 to the water-phase imbibition area, and the acoustic energy converter 49 records the changes of transverse and longitudinal waves v 20s and v 20p when penetrating the layer to imbibition water in real time. Likewise, a weakening index D Wearing wear of the through-layer water absorption to the sample 65 can be obtained:
The influence of the water absorption on the reservoir stability S in the bedding and penetrating layers can be judged according to the method, and the method can be expressed as follows:
When S is more than 1, the weakness degree of the seepage water to the bedding layer is higher, and the wearing layer has higher stability; when S is equal to 1, the influence of the water seepage on the bedding and wearing layers is consistent, so that the stability of the bedding and wearing layers is consistent; when S is less than 1, the extent of weakening of the penetration layer by the water seepage is higher, and the smoothness layer has higher stability.
Meanwhile, the time of the permeation experiment through the layer is t 2, and the mass of the sample 65 is m 3. The imbibition index C reflecting the difference of spontaneous imbibition between the sequential layer and the penetrating layer can be obtained through the real-time change of the quality of imbibition process:
When C is greater than 1, fluid migration in the laminar direction is advantageous; when C is equal to 1, there is no difference in fluid migration in different directions; when C is less than 1, fluid transport in the through-layer direction is advantageous.
Likewise, sample 65 was lowered to the measurable oil bleed index in third solution supply 38 following the procedure described above.
(2) Experiment of influence of initial moisture content of same sample 65 on spontaneous imbibition of shale reservoir
Cutting: firstly, a first opening and closing door is opened, a sample 65 is placed on a carrying platform 9, the first opening and closing door 1 is closed, the sample 65 is clamped by an automatic control clamp 11 at the front end of a telescopic arm 10 under the control of a computer control system 16, the sample 65 is moved into a laser cutting machine 8, the cutting position and the cutting size are set, and after the cutting is completed, the sample is clamped by the telescopic arm 10.
And (3) drying: and opening the second opening and closing door 2, opening the fourth opening and closing door 4, clamping a sample 65 by an automatic control clamp 11 at the front end of the telescopic arm 10, entering a drying area through the first conveying channel 12, closing the second opening and closing door 2 and the fourth opening and closing door 4, regulating the temperature to 60 ℃, and continuously drying for more than 48 hours. At this point the mass of sample 65 was recorded as m 4.
Saturation: the seventh opening and closing door 7 is opened, the sample 65 is clamped by the automatic control clamp 11 at the front end of the telescopic arm 10 to enter a saturation region, the seventh opening and closing door 7 is closed, the mass m 5 of the saturated sample 65 is recorded, and at the moment, the water content w 1 of the sample 65 is as follows:
The seventh shutter 7 is used for the passage of the sample 65 into the saturation region, and the seventh shutter 7 not only provides a passage for the sample 65 to enter the saturation region, but also improves the accuracy of the experiment in order to ensure that the environment of the saturation region is not interfered by external environmental factors.
Gluing: and (3) gluing the sample in accordance with the operation of the step (1) so as to carry out a sequential imbibition experiment of the sample under the condition that the water content is w 1.
Water absorption: the fifth opening and closing door 5 is opened, the automatic control clamp 11 at the front end of the telescopic arm 10 descends to the position above the second solution supply device 37 of the water phase imbibition area, the thermostat 35 and the humidifier 36 are regulated, the temperature and the humidity of the imbibition area are kept constant, the telescopic arm 10 stretches, the sample 65 is completely immersed in the water phase solution, and the fifth opening and closing door 5 is closed.
Parameter measurement: the weight reading is recorded in real time by a gravity sensor on the controllable telescopic boom 10, the experimental time is t 3, and the sequential imbibition mass of the sample under the condition that the water content is w 1 is measured to be m 6. And (3) testing a penetrating and sucking experiment under the condition that the water content is w 1 in accordance with the operation of the step (1), and measuring the penetrating and sucking quality of m 8 when the water content is w 1. Thus, the imbibition index C w1 reflecting the difference of spontaneous imbibition of the compliant layer and the penetrating layer under the condition that the water content is w 1 can be obtained:
Wherein m 7 is the mass of the smooth imbibition and drying, g; t 4 is the penetration and absorption time, h.
Likewise, the imbibition index at different water contents can be measured by the above steps.
Under the conditions of sequential and penetrating imbibition, the influence of the water content on the weakening index D w Cis-cis 、Dw Wearing wear of the sample 65 is expressed as follows:
In the formula, The transverse wave speed before water absorption of the lower bedding layer is m/s, and the water content is w; the longitudinal wave speed before water absorption in the downstream layer is m/s under the water content w; The transverse wave speed is m/s in the water absorption process of the downstream layer under the water content w; the longitudinal wave speed, m/s, of the water absorption process of the bedding layer under the water content w; the water content is w, and the transverse wave speed before water absorption of the lower penetrating layer is m/s; The longitudinal wave speed before water absorption of the penetrating layer is the water content w, m/s; The transverse wave speed, m/s, of the water absorption process of the lower penetrating layer with the water content of w; the longitudinal wave speed, m/s, of the water absorption process of the penetrating layer under the water content w.
Likewise, the effect of different water content conditions on the imbibition oil phase solution can be measured according to the steps.
The shale spontaneous imbibition evaluation device can be used for completing tests under various experimental paths, including sequential imbibition and penetrating imbibition of the same sample and sequential imbibition and penetrating imbibition experiments under different saturation conditions.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (23)
1. The shale spontaneous imbibition evaluation device is characterized by comprising a cutting area, a drying area, a saturation area, a gluing area, an imbibition area and a computer control system; the cutting area, the drying area, the gluing area and the imbibition area are sequentially arranged, and the saturation area is adjacent to the drying area;
The cutting area is provided with a first opening and closing door, a second opening and closing door, a cutting assembly and a conveying assembly; the transport assembly is capable of moving the sample; the computer control system is connected with the transportation assembly and the cutting assembly;
The drying area is connected with the cutting area through a second opening and closing door; the drying area is provided with a first transportation channel, a drying assembly and a fourth opening and closing door; the drying assembly is arranged below the first transportation channel, and the drying assembly and the first transportation channel are both connected with the computer control system;
The gluing area is provided with a second transportation channel, a positioning device, a triaxial moving assembly, a gluing assembly, a third opening and closing door and a sixth opening and closing door, the positioning device is connected with the triaxial moving assembly, and the positioning device is arranged on the gluing assembly; the positioning device and the triaxial moving assembly are connected with the computer control system; the drying area is connected with the gluing area through a third opening and closing door, the second transportation channel can move samples from the third opening and closing door to the gluing assembly, and the sixth opening and closing door is arranged below the second transportation channel;
the seepage and suction area is provided with a fifth opening and closing door and a seepage and suction experimental device, and the transport assembly can move samples from the gluing area to the seepage and suction area through the fifth opening and closing door;
the saturation region is provided with a seventh opening and closing door, and the saturation region is provided with a container for containing water.
2. The spontaneous imbibition evaluation device of claim 1, wherein the transport assembly comprises a telescoping arm and an automated control clip, both of which are connected to the computer control system.
3. The shale spontaneous imbibition evaluation device according to claim 2, wherein the telescopic arm is provided with a weight sensor.
4. The spontaneous imbibition evaluation device of shale according to claim 1, wherein the cutting zone is further provided with a solenoid valve, one end of the solenoid valve is connected with a gas supply source, and the other end of the solenoid valve is connected with the cutting assembly.
5. The shale spontaneous imbibition evaluation device of claim 1, wherein the cutting assembly comprises a laser cutter and a carrier platform, the laser cutter being connected to the computer control system.
6. The spontaneous penetration evaluation device of shale according to claim 5, wherein a waste collection area is arranged below the carrying platform, and a waste collector is also arranged beside the carrying platform.
7. The spontaneous penetration and suction evaluation device for shale according to claim 1, wherein the drying assembly comprises a heater, a first temperature sensor, a humidity controller and a suction pump, wherein the heater, the temperature controller and the suction pump are all connected with the computer control system, the heater is arranged below the first transportation channel, the first temperature sensor is connected with the first transportation channel, and the heater is connected with the temperature controller.
8. The spontaneous imbibition evaluation device of shale according to claim 1, wherein the gluing assembly comprises a gluing die, a movable operating platform and a glue transmission assembly, wherein the glue transmission assembly comprises a glue tank, a glue pump, a glue storage tank, a glue guide pipe, a glue cylinder, a pressing sheet and a glue pipe which are sequentially connected, a piston is arranged in the glue storage tank, the movable operating platform is arranged below the glue pipe, and the gluing die is arranged on the movable operating platform.
9. The spontaneous imbibition evaluation device of claim 8, wherein a first liquid level sensor and a pressure detector are further arranged on the glue storage tank.
10. The spontaneous imbibition evaluation device of claim 9, wherein a safety valve is further arranged above the glue storage tank.
11. The spontaneous imbibition evaluation device of claim 9, wherein the glue reservoir is further coupled to a first solution supply.
12. The spontaneous penetration and absorption shale evaluation device according to claim 11, wherein the number of the glue tanks is two, the glue pump is connected with one of the glue tanks, a mixing stirrer is arranged between the two glue tanks, the two glue tanks are both connected with an inlet of the mixing stirrer, one end of the first solution supply device is connected with an outlet of the mixing stirrer, and the other end of the first solution supply device is connected with the glue storage tank.
13. The spontaneous imbibition evaluation device of claim 8, wherein the positioning device comprises a position sensor and a directional control valve, the directional control valve is connected with the triaxial moving assembly, and the position sensor and the directional control valve are both connected with the computer control system.
14. The spontaneous penetration and suction evaluation device for shale according to claim 13, wherein the triaxial moving assembly comprises an X-direction moving axis, a Y-direction moving axis and a Z-direction moving axis, wherein the X-direction moving axis, the Y-direction moving axis and the Z-direction moving axis are perpendicular to each other, and the gumming die can move along the triaxial moving assembly.
15. The shale spontaneous imbibition evaluation device according to claim 8, wherein the gluing mould is hexahedron, the inside of every face is filled with the heating plate, the inside of gluing mould is the cavity, is equipped with first injecting glue mouth, second injecting glue mouth, third injecting glue mouth and fourth injecting glue mouth on upper wall, diapire and two opposite lateral walls, first injecting glue mouth, second injecting glue mouth, third injecting glue mouth and fourth injecting glue mouth are connected with a rubber tube respectively, first injecting glue mouth, second injecting glue mouth, third injecting glue mouth and fourth injecting glue mouth are equipped with first control axle, second control axle, third control axle and fourth control axle respectively.
16. The spontaneous imbibition evaluation device of claim 1, wherein the imbibition experimental device comprises a spontaneous imbibition heat-preserving moisture-sealing system, wherein the spontaneous imbibition heat-preserving moisture-sealing system comprises a shell and a flexible connecting rod, a sample rotating clamp, a thermostat, a humidifier, a first analytical balance, a second analytical balance, a imbibition dish, a second liquid level sensor, an acoustic energy converter, a sample cabinet, a second temperature sensor and a humidity sensor which are arranged inside the shell; the humidity sensor and the second temperature sensor are arranged on the side wall of the shell, and the soft connecting rod, the sample rotating clamp, the thermostat, the humidifier, the first analytical balance, the second analytical balance, the percolating vessel, the second liquid level sensor, the acoustic energy converter and the sample cabinet are all arranged in the shell;
The first analytical balance is connected with the sample cabinet through a soft connecting rod, the sample rotating clamp and the acoustic energy converter are arranged in the sample cabinet, the sample clamp is further arranged in the sample cabinet, the humidifier and the thermostat are arranged at the bottom or on the side wall of the shell, the second analytical balance is arranged at the bottom of the shell, the dialysis vessel is arranged above the second analytical balance, and a second liquid level sensor is arranged in the dialysis vessel;
The infiltration vessel is also connected with a water supplementing groove and an oil supplementing groove, the water supplementing groove is connected with the infiltration vessel through a second solution supply device, and the oil supplementing groove is connected with the infiltration vessel through a third solution supply device.
17. A shale spontaneous imbibition evaluation method, characterized in that the shale spontaneous imbibition evaluation device according to any one of claims 1-16 is used, comprising the following steps:
Preparing a sequential imbibition sample;
Performing sequential infiltration;
preparing a penetrating imbibition sample;
Performing penetrating permeation;
Preparing samples with different saturation;
and carrying out sequential imbibition and cross-layer imbibition on samples with different saturation, and carrying out data processing after sequential imbibition and cross-layer imbibition to obtain imbibition indexes and mechanical parameters under different imbibition paths.
18. The method for evaluating spontaneous imbibition of shale according to claim 17, wherein the sequential imbibition sample preparation process comprises:
Measuring the weight and size of the sample;
Sequentially drying the samples in a drying area, and gluing in a gluing area;
And carrying out ultrasonic velocity measurement on the glued sample to obtain initial mechanical parameters of the sample before carrying out the forward osmosis experiment.
19. The method for evaluating spontaneous imbibition of shale according to claim 18, wherein the sequential imbibition process comprises:
measuring parameters of a sequential imbibition sample;
carrying out sequential imbibition on the sequential imbibition sample in the imbibition region;
the transverse and longitudinal wave velocities and the weight changes before and after imbibition were measured.
20. The method for evaluating spontaneous imbibition of shale according to claim 17, wherein the process for preparing the transhipment imbibition sample comprises:
Sequentially drying the samples in a drying area, and gluing in a gluing area;
carrying out laser cutting on the glued sample according to the set index of the penetrating and sucking sample;
and carrying out ultrasonic velocity measurement on the cut sample to obtain the mechanical parameters of the sample before carrying out the penetration and imbibition experiment.
21. The method for evaluating spontaneous imbibition of shale according to claim 20, wherein the process of transhipment imbibition comprises:
measuring parameters of the penetrating imbibition sample;
carrying out penetrating imbibition on the penetrating imbibition sample in the imbibition area;
the transverse and longitudinal wave velocities and the weight changes before and after imbibition were measured.
22. The method for evaluating spontaneous imbibition of shale according to claim 17, wherein the preparation process of the samples with different saturation comprises the following steps:
sequentially drying different samples in a drying area, and gluing in a gluing area;
carrying out laser cutting on different samples after gluing according to set sample indexes with different saturation;
Soaking the cut different samples in a saturation region according to set sample indexes with different saturation degrees to obtain samples with different saturation degrees;
And carrying out ultrasonic velocity measurement on the samples with different saturation degrees to obtain mechanical parameters of the samples with different saturation degrees before carrying out the sequential permeation and absorption experiments and the penetrating permeation and absorption experiments.
23. The method for evaluating spontaneous imbibition of shale according to claim 22, wherein samples with different saturation degrees are subjected to sequential imbibition and cross-layer imbibition, and data processing after sequential imbibition and cross-layer imbibition is performed to obtain imbibition indexes and mechanical parameters under different imbibition paths, and the method specifically comprises the following steps:
Carrying out sequential imbibition on samples with different saturation in an imbibition area, and measuring the transverse wave speed, the longitudinal wave speed and the weight change before and after imbibition;
Carrying out penetrating imbibition on samples with different saturation in an imbibition area, and measuring the transverse wave speed, the longitudinal wave speed and the weight change before and after imbibition;
and carrying out data processing after sequential imbibition and transhipment imbibition to obtain imbibition indexes and mechanical parameters under different imbibition paths.
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| US20170081583A1 (en) * | 2015-09-17 | 2017-03-23 | Saudi Arabian Oil Company | Chemical Imbibition by Gels Containing Surfactants for Fractured Carbonate Reservoirs |
| CN108717031A (en) * | 2018-05-08 | 2018-10-30 | 中国石油大学(北京) | A kind of method and apparatus of quantitatively characterizing shale reservoir rock wettability |
| CN110441206A (en) * | 2019-07-26 | 2019-11-12 | 中国石油大学(北京) | Integrated shale imbibition device is cut in imbibition and imbibition efficiency parameters determine method |
| CN112414884A (en) * | 2020-11-06 | 2021-02-26 | 中国石油大学(北京) | Shale dynamic imbibition device and method for determining dynamic imbibition influence result |
| CN114755072A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气股份有限公司 | Shale physical model, and preparation method and device of saturated oil shale core sample |
| CN217462141U (en) * | 2022-03-14 | 2022-09-20 | 中国石油天然气股份有限公司 | Real rock core microcosmic displacement model |
| CN117347419A (en) * | 2023-12-06 | 2024-01-05 | 中国地质大学（武汉） | Shale imbibition saturation detection method, shale imbibition saturation detection device, shale imbibition saturation detection medium and electronic equipment |
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