CN110441206B - Shale imbibition device integrating imbibition and cutting and method for determining imbibition efficiency parameters - Google Patents
Shale imbibition device integrating imbibition and cutting and method for determining imbibition efficiency parameters Download PDFInfo
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- CN110441206B CN110441206B CN201910681469.9A CN201910681469A CN110441206B CN 110441206 B CN110441206 B CN 110441206B CN 201910681469 A CN201910681469 A CN 201910681469A CN 110441206 B CN110441206 B CN 110441206B
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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
- 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
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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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
Abstract
The application provides a shale imbibition device and imbibition efficiency parameter determination method of imbibition cutting integration, wherein, the device includes: the movable sample support enables the target shale sample to move among the drying transition area, the sample cutting area and the spontaneous imbibition area, and a weighing sensor is arranged on the movable sample support to detect the mass of the target shale sample; the drying transition area is used for drying the target shale sample; the sample cutting area is used for carrying out laser scanning on the dried target shale sample, sending a scanning result to the controller and carrying out laser cutting on the target shale sample under the control of the controller so as to form an artificial crack; the spontaneous imbibition area is used for carrying out an imbibition experiment on the target shale sample; and the controller is used for controlling the movable sample support to move and generating a laser cutting instruction according to the scanning result. The device can accurately control the form of the artificial fracture and can research the influence of the complex artificial fracture on the shale imbibition capacity.
Description
Technical Field
The application relates to the technical field of oil and gas field development, in particular to a shale imbibition device integrating imbibition and cutting and a method for determining imbibition efficiency parameters.
Background
Shale has the characteristics of low porosity and extremely low permeability, and different from the exploitation of conventional oil and gas reservoirs, the physical properties of reservoirs must be modified in the process of exploiting shale gas reservoirs. Spontaneous imbibition is an important mechanism influencing shale gas production behavior, and in the spontaneous imbibition process, fracturing fluid spontaneously enters a shale reservoir matrix under the action of capillary force to replace natural gas existing in the matrix. The complex fracture network is artificially manufactured in the reservoir by applying the hydraulic equal-pressure fracturing technology, so that the contact area of the shale reservoir matrix and the fracturing fluid can be effectively increased, the shale reservoir matrix can generate a spontaneous imbibition gas production process in a larger range, meanwhile, the fracture network can improve the integral flow conductivity of the shale reservoir, and finally, the shale gas yield increase is realized. Therefore, the influence mechanism of the artificial cracks and the network development characteristics thereof on the spontaneous imbibition process of the shale is clear, and the method has important guiding significance for improving the shale gas recovery rate.
The conventional method for researching the influence of the artificial fracture on the spontaneous imbibition is a triaxial hydraulic fracturing experiment, however, the method cannot accurately control the form of the artificial fracture, the sample required by the method is a large block sample, the sample cannot be obtained by drilling and coring, the large block sample has low acquireability, and the method cannot visually obtain the influence of different artificial fractures on the flow conductivity of a shale reservoir.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a shale imbibition device integrating imbibition and cutting and a method for determining imbibition efficiency parameters, and aims to solve the technical problem that a complex artificial fracture network cannot be constructed on a small sample and the influence of the complex artificial fracture network on spontaneous imbibition can not be evaluated in the conventional scheme.
The embodiment of the application provides a shale imbibition device of imbibition cutting integration, includes: the movable sample support is used for fixing the target shale sample so that the target shale sample moves among the drying transition area, the sample cutting area and the spontaneous imbibition area, and a weighing sensor is arranged on the movable sample support and used for detecting the mass of the target shale sample; the drying transition area is used for drying the target shale sample; the sample cutting area is used for carrying out laser scanning on the dried target shale sample, sending a scanning result to the controller, and carrying out laser cutting on the target shale sample under the control of the controller so as to form an artificial crack; the spontaneous imbibition area is used for carrying out an imbibition experiment on the dried target shale sample or the cut target shale sample; and the controller is used for controlling the movable sample support to move so as to enable the target shale sample to move among the drying transition area, the sample cutting area and the spontaneous imbibition area, and is also used for generating a laser cutting instruction according to the scanning result.
In one embodiment, the apparatus further comprises: and the solution supply area is connected with the spontaneous imbibition area and the controller and is used for supplying the solution for the spontaneous imbibition experiment in the spontaneous imbibition area under the control of the controller.
In one embodiment, the movable sample support comprises a telescopic cantilever and a control clamp arranged at one end of the telescopic cantilever, the control clamp is used for fixing the target shale sample, and the telescopic cantilever can be telescopic and can slide along a preset groove so as to enable the target shale sample to move among the drying transition area, the sample cutting area and the spontaneous imbibition area.
In one embodiment, the drying transition region includes: the system comprises a first opening control door, a first constant temperature controller, a first heater and a first temperature sensor; when the first opening control door is opened, the target shale sample enters the drying transition area and is fixed on the movable sample support, the first temperature sensor is used for detecting the temperature in the drying transition area and sending the detected temperature to the controller, and the first constant temperature controller and the first heater are enabled to perform combined operation under the control of the controller so as to dry the target shale sample at a first preset temperature.
In one embodiment, the sample cutting area comprises: the device comprises a first control opening and closing door, a laser scanning cutting instrument, a liftable objective table and a sliding chute; the liftable objective table can rotate by an angle under the control of the controller, a sample groove for fixing a target shale sample is arranged on the liftable objective table, the laser scanning cutting instrument can move along the sliding groove, and the sliding groove is arranged around the liftable objective table in a sample cutting area; after the target shale sample is dried, the controller controls the first control opening and closing door to be opened, controls the movable sample support to enter the sample cutting area through the first control opening and closing door, controls the movable sample support to place the target shale sample in the sample groove of the liftable object stage, and then controls the movable sample support to return to the drying transition area and controls the first control opening and closing door; the laser scanning cutting instrument scans a target shale sample in the sample tank under the control of the controller, and sends a scanning result to the controller, and the controller controls the liftable object stage to rotate according to the scanning result and controls the laser scanning cutting instrument to perform laser cutting on the target shale sample so as to form an artificial crack.
In one embodiment, the spontaneous imbibition region comprises: the second control opening and closing door, the second temperature sensor, the second constant temperature controller, the second heater, the first liquid level supply device, the liquid level monitor and the container; the solution replenishment zone comprises: a solution supply tank and a second liquid level supply; the container and the solution supply tank are used for containing a solution for spontaneous imbibition experiments, and the first liquid level supply device is communicated with the second liquid level supply device so as to supply the solution in the solution supply tank to the container; the controller controls the second control opening and closing door to be opened so that the movable sample support can move the target shale sample to the spontaneous imbibition area, controls the second control opening and closing door to be closed, and puts the target shale sample into the solution in the container to perform spontaneous imbibition experiments; the second temperature sensor is used for detecting the temperature of the spontaneous imbibition region and sending the detected temperature to the controller, and the controller controls the second constant temperature controller and the second heater to jointly cooperate to enable the spontaneous imbibition region to be kept at a second preset temperature according to the received temperature; the liquid level monitor is used for monitoring the liquid level change of the solution in the container and sending the monitored liquid level change to the controller, and the controller controls the first liquid level supplier and the second liquid level supplier to supply the solution in the container according to the liquid level change.
The embodiment of the application also provides a method for determining the imbibition efficiency parameter of the shale imbibition device based on the imbibition and cutting integration, which comprises the following steps: acquiring the initial drying mass and the initial imbibition mass of an uncut target shale sample; controlling the movable sample support to move the target shale sample to the drying transition area so as to dry the target shale sample in the drying transition area; controlling a movable sample support to move the dried target shale sample from a drying transition area to a sample cutting area, so that the sample cutting area scans and cuts the dried target shale sample to form an artificial crack; controlling a movable sample support to move the cut target shale sample from a sample cutting area to a drying transition area, and acquiring a first cutting mass of the cut target shale sample from a weighing sensor; controlling a movable sample support to move the cut target shale sample from a drying transition area to a spontaneous imbibition area, so that the cut target shale sample is subjected to a spontaneous imbibition experiment in the spontaneous imbibition area, and acquiring a first imbibition mass of the imbibed target shale sample from a weighing sensor; and determining the imbibition efficiency parameter of the artificial fracture on the target shale sample according to the initial drying mass, the initial imbibition mass, the first cutting mass and the first imbibition mass.
In one embodiment, obtaining an initial oven-dry mass and an initial imbibition mass of an uncut target shale sample comprises: controlling a drying transition area to dry a target shale sample, and acquiring the initial drying mass of the dried target shale sample from a weighing sensor, wherein the target shale sample is fixed on a movable sample support; and controlling the movable sample support to move the dried target shale sample from the drying transition area to the spontaneous imbibition area, so that the dried target shale sample is subjected to a spontaneous imbibition experiment in the spontaneous imbibition area, and acquiring the initial imbibition mass of the imbibed target shale sample from the weighing sensor.
In one embodiment, the controlling the movable sample support to move the target shale sample to the drying transition area so that the target shale sample is subjected to drying treatment in the drying transition area comprises: controlling the movable sample support to move the target shale sample to a drying transition area; acquiring the temperature detected by a first temperature sensor; and controlling the first constant temperature controller and the first heat generator to work in a combined manner according to the temperature detected by the first temperature sensor so as to dry the target shale sample at a first preset temperature.
In one embodiment, the controlling the movable sample support to move the dried target shale sample from the drying transition area to the sample cutting area, so that the sample cutting area scans and cuts the dried target shale sample to form the artificial fracture includes: controlling the movable sample support to move the dried target shale sample from the drying transition area to the sample cutting area; controlling the movable sample support to place the target shale sample in a sample groove of the lifting object stage; controlling a laser scanning cutting instrument to scan the target shale sample in the sample tank, and obtaining a scanning result of the laser scanning cutting instrument; and controlling the lifting object stage to rotate according to the scanning result and controlling the laser scanning cutting instrument to cut the target shale sample so as to form the artificial crack.
In one embodiment, the controlling the movable sample support to move the cut target shale sample from the drying transition area to the spontaneous imbibition area so that the cut target shale sample performs a spontaneous imbibition experiment in the spontaneous imbibition area includes: controlling a movable sample support to move the cut target shale sample from a drying transition area to a spontaneous imbibition area; acquiring the temperature detected by the second temperature sensor and the liquid level change of the solution in the container monitored by the liquid level monitor; controlling a second constant temperature controller and a second heater to work in a combined manner according to the temperature detected by a second temperature sensor so as to perform a spontaneous imbibition experiment on the target shale sample at a second preset temperature; and controlling the first liquid level supplier and the second liquid level supplier to supply the solution in the container according to the liquid level change.
In one embodiment, determining the imbibition efficiency parameter of the artificial fracture for the target shale sample based on the initial oven-dry mass, the initial imbibition mass, the first cut mass, and the first imbibition mass comprises: determining the imbibition efficiency parameter of the artificial fracture on the target shale sample according to the following formula:
wherein, IF1Is a parameter of imbibition efficiency, m'0M is the initial imbibition mass0M is the initial drying mass1Is the first cutting mass, m'1Is the first imbibition mass.
The embodiment of the present application further provides a computer device, which includes a processor and a memory for storing processor executable instructions, where the processor executes the instructions to implement the steps of the method for determining the imbibition efficiency parameter based on the imbibition and cutting integrated shale imbibition device described in any of the above embodiments.
Embodiments of the present application further provide a computer-readable storage medium, on which computer instructions are stored, where the instructions, when executed, implement the steps of the method for determining the imbibition efficiency parameter based on the imbibition and cutting integrated shale imbibition device described in any of the above embodiments.
In the embodiment of the application, the shale imbibition device integrating imbibition and cutting comprises a movable sample support, wherein a target shale sample moves among a drying transition area, a sample cutting area and a spontaneous imbibition area; the drying transition area is used for drying the target shale sample; the sample cutting area is used for carrying out laser scanning on the dried target shale sample, sending a scanning result to the controller, and carrying out laser cutting on the target shale sample under the control of the controller so as to form an artificial crack; the spontaneous imbibition area is used for carrying out an imbibition experiment on the dried target shale sample or the cut target shale sample; and the controller is used for controlling the movable sample support to move so as to enable the target shale sample to move among the drying transition area, the sample cutting area and the spontaneous imbibition area, and is also used for generating a laser cutting instruction according to the scanning result. In the scheme, the automatic control of the spontaneous imbibition device is realized through the controller, the sample cutting and imbibition experiments are integrated, after each imbibition experiment is finished, the inside of the device can be dried, the processes of cutting, imbibition and drying are repeated again, the cutting imbibition can be carried out on one sample for multiple times, and the operation is simple; furthermore, in the above scheme, the laser scanning cutting instrument is used for scanning the target shale sample, and the controller can accurately control the laser scanning cutting instrument to cut the shale sample according to the scanning result, so that the form of the artificial crack can be accurately controlled, the control of cutting one sample for multiple times can be realized, the influence of a complex artificial crack network on the shale imbibition capacity can be researched, and the influence of heterogeneity can be avoided. The scheme overcomes the defect that the artificial fracture spontaneous imbibition research in the prior art is less, and can provide theoretical support for developing fracturing in a shale reservoir.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this application, and are not intended to limit the application. In the drawings:
FIG. 1 illustrates a schematic view of a imbibition and cutting integrated shale imbibition device in an embodiment of the present application;
fig. 2 is a flow chart illustrating a method for determining a imbibition efficiency parameter based on an imbibition and cutting integrated shale imbibition device according to an embodiment of the present application;
fig. 3 shows a schematic diagram of a computer device in an embodiment of the application.
Detailed Description
The principles and spirit of the present application will be described with reference to a number of exemplary embodiments. It should be understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the present application, and are not intended to limit the scope of the present application in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The application provides a shale imbibition device of imbibition cutting integration, the device can include: the movable sample support is used for fixing the target shale sample so that the target shale sample moves among the drying transition area, the sample cutting area and the spontaneous imbibition area, and a weighing sensor is arranged on the movable sample support and used for detecting the mass of the target shale sample; the drying transition area is used for drying the target shale sample; the sample cutting area is used for carrying out laser scanning on the dried target shale sample, sending a scanning result to the controller, and carrying out laser cutting on the target shale sample under the control of the controller so as to form an artificial crack; the spontaneous imbibition area is used for carrying out an imbibition experiment on the dried target shale sample or the cut target shale sample; and the controller is used for controlling the movable sample support to move so as to enable the target shale sample to move among the drying transition area, the sample cutting area and the spontaneous imbibition area, and is also used for generating a laser cutting instruction according to the scanning result.
Illustratively, fig. 1 shows a schematic diagram of a imbibition and cutting integrated shale imbibition device provided by an embodiment of the application. As shown in fig. 1, the imbibition and cutting integrated shale imbibition device provided by the embodiment of the present application may include a movable sample holder 10, a drying transition region 20, a spontaneous imbibition region 30, a sample cutting region 40, and a controller 50. The movable sample support 10 is used to hold a target shale sample such that the target shale sample moves between the drying transition region 20, the spontaneous imbibition region 30, and the sample cutting region 40. The movable sample support 10 is provided with a weighing sensor 11 for detecting the mass of the target shale sample. The drying transition area 20 is used for drying the target shale sample. The sample cutting area 40 is configured to perform laser scanning on the dried target shale sample, send a scanning result to the controller 50, and perform laser cutting on the target shale sample under the control of the controller 50 to form an artificial fracture. The spontaneous imbibition region 30 is used for carrying out an imbibition experiment on the dried target shale sample or the cut target shale sample. The controller 50 is used for controlling the movable sample support 10 to move so as to enable the target shale sample to move among the drying transition area 20, the sample cutting area 40 and the spontaneous imbibition area 30, and is also used for generating laser cutting instructions according to the scanning result. During the experiment, the whole apparatus was in a closed environment, and the respective zones were also in a relatively closed environment in the respective processing steps.
The spontaneous imbibition device in the embodiment realizes automatic control of the spontaneous imbibition device through the controller, integrates sample cutting and imbibition experiments, can be dried in the device after each imbibition experiment is finished, repeats the processes of cutting, imbibition and drying again, can perform cutting imbibition for a plurality of times for one sample, and is simple to operate; furthermore, the whole device is in a closed environment during the experiment, so that the experiment error caused by the environment change in the experiment process is avoided, and the precision can be improved; furthermore, in the above scheme, the laser scanning cutting instrument is used for scanning the target shale sample, and the controller can accurately control the laser scanning cutting instrument to cut the shale sample according to the scanning result, so that the form of the artificial crack can be accurately controlled, the control of cutting one sample for multiple times can be realized, the influence of a complex artificial crack network on the shale imbibition capacity can be researched, and the influence of heterogeneity can be avoided. Furthermore, the target shale sample can be a cube shale sample with the side length of at least 1cm, and a larger sample is needed in the prior art, so that the limitation of the sample size on the experiment is greatly reduced. The device in the embodiment overcomes the defect that the artificial fracture spontaneous imbibition research in the prior art is less, and can provide theoretical support for developing fracturing in a shale reservoir.
In some embodiments of the present application, as shown in FIG. 1, the apparatus may further include a solution replenishment zone 60. The solution supply region 60 is connected to the spontaneous imbibition region 30 and the controller 50, and is used for supplying the solution for the spontaneous imbibition experiment in the spontaneous imbibition region 30 under the control of the controller 50. The solution required by the spontaneous imbibition experiment can be timely supplemented for spontaneous imbibition through the solution supply area. Illustratively, the solution may be deionized water and n-decane.
In some embodiments of the present application, as shown in fig. 1, the movable sample support 10 may include a retractable cantilever 12 and a control clip 13 disposed at one end of the retractable cantilever. The control clamp 13 is used for fixing the target shale sample. The telescopic boom 12 is capable of telescoping and sliding along a predetermined channel to move the target shale sample between the drying transition region 20, the sample cutting region 40, and the spontaneous imbibition region 30.
In some embodiments of the present application, the drying transition area 20 may include: a first opening control door 21, a first thermostat control 22, a first heater 23, and a first temperature sensor 24. When the first opening control door is opened, the target shale sample enters the drying transition area and is fixed on the movable sample support 10. The first temperature sensor 24 is configured to detect a temperature in the drying transition area 20 and send the detected temperature to the controller 50, so that the first thermostatic controller 22 and the first heat generator 23 work together under the control of the controller 50 to perform a drying process on the target shale sample at a first preset temperature. The first preset temperature is a drying temperature, and can be set according to actual experiment requirements, for example, 70 ℃, and the drying temperature and the drying time are required to ensure that the sample is a dry sample when the cutting and imbibition experiments are performed on the sample.
In some embodiments of the present application, as shown in fig. 1, the sample cutting area 40 comprises: a first control opening and closing door 41, a laser scanning cutting instrument 42, a liftable object stage 43 and a sliding chute 45. The liftable object stage 43 can rotate by an angle under the control of the controller 50, and a sample groove 44 for fixing a target shale sample is arranged on the liftable object stage 43. The laser scanning cutter 42 is movable along the chute 45. The slide groove 45 is provided around the liftable stage 43 in the sample cutting area 40. After the target shale sample is dried, the controller 50 controls the first control shutter 41 to open, controls the movable sample holder 10 to enter the sample cutting area 40 through the first control shutter 41, and controls the movable sample holder 10 to place the target shale sample in the sample slot 44 of the liftable object stage 43. Thereafter, the controller 50 controls the movable sample support 10 to return to the drying transition area 20 and controls the first control shutter 41 to close. The laser scanning cutter 42 scans the target shale sample in the sample tank 44 under the control of the controller 50 and sends the scanning results to the controller 50. The controller 50 controls the liftable object stage 43 to rotate according to the scanning result and controls the laser scanning cutting instrument 42 to perform laser cutting on the target shale sample so as to form the artificial crack.
In some embodiments of the present application, as shown in FIG. 1, the spontaneous imbibition region 30 includes: a second control opening and closing door 31, a second temperature sensor 32, a second thermostatic controller 33, a second heater 34, a first liquid level supply 35, a liquid level monitor 36 and a container 37. The solution replenishment area 60 includes: a solution supply tank 61 and a second liquid level supply 62. The container 37 and the solution supply tank 61 are used to hold the solution for spontaneous imbibition experiments. The first liquid-level supplier 35 communicates with the second liquid-level supplier 62 to supply the solution in the solution supply tank 61 to the container 37. The controller 50 controls the second control shutter 31 to be opened so that the movable sample holder 10 moves the target shale sample to the spontaneous imbibition region 30, controls the second control shutter 31 to be closed, and lowers the target shale sample into the solution in the container 37 for the spontaneous imbibition experiment. The second temperature sensor 32 is configured to detect the temperature of the spontaneous imbibition region 30 and send the detected temperature to the controller 50. The controller 50 controls the second thermostat 33 and the second heater 34 to work in combination according to the received temperature so that the spontaneous imbibition region 30 is maintained at the second preset temperature. The second preset temperature can be selected according to actual experiment needs. The level monitor 36 is used to monitor changes in the level of the solution in the vessel 37 and to send the monitored changes in the level to the controller 50. The controller 50 controls the first liquid level supplier 35 and the second liquid level supplier 62 to supply the solution in the tank 37 according to the liquid level change. The solution supply area 60 may further include a second opening control door 63, and when the second opening control door 63 is opened, the solution in the solution supply tank 61 may be replenished.
In some embodiments of the present application, the apparatus further comprises: a conductivity mechanism 71 and a conductivity electrode 72, wherein the conductivity electrode 72 is connected to the conductivity mechanism 71, and the conductivity electrode 72 extends into the solution in the container 37 to detect the conductivity of the solution and transmit the detected conductivity to the controller 50. The controller 50 can obtain the change of the solution conductivity with time in the spontaneous imbibition process according to the received conductivity, so as to know the water absorption rate, capillary force, water absorption capacity of the target shale sample, the dissolution condition of ions in the target shale sample, and the like.
The embodiment of the application further provides a method for determining the imbibition efficiency parameter based on the shale imbibition device integrating imbibition and cutting, and fig. 2 shows a flowchart of the method for determining the imbibition efficiency parameter in the embodiment of the application. Although the present application provides method operational steps or apparatus configurations as illustrated in the following examples or figures, more or fewer operational steps or modular units may be included in the methods or apparatus based on conventional or non-inventive efforts. In the case of steps or structures which do not logically have the necessary cause and effect relationship, the execution sequence of the steps or the module structure of the apparatus is not limited to the execution sequence or the module structure described in the embodiments and shown in the drawings of the present application. When the described method or module structure is applied in an actual device or end product, the method or module structure according to the embodiments or shown in the drawings can be executed sequentially or executed in parallel (for example, in a parallel processor or multi-thread processing environment, or even in a distributed processing environment).
Specifically, as shown in fig. 2, a method for determining a parameter of imbibition efficiency provided by an embodiment of the present application may include the following steps:
step S201, acquiring the initial drying mass and the initial imbibition mass of an uncut target shale sample;
step S202, controlling a movable sample support to move the target shale sample to a drying transition area so as to dry the target shale sample in the drying transition area;
step S203, controlling a movable sample support to move the dried target shale sample from the drying transition area to a sample cutting area, so that the sample cutting area scans and cuts the dried target shale sample to form an artificial crack;
step S204, controlling a movable sample support to move the cut target shale sample from a sample cutting area to a drying transition area, and acquiring a first cutting mass of the cut target shale sample from a weighing sensor;
step S205, controlling a movable sample support to move the cut target shale sample from a drying transition area to a spontaneous imbibition area, so that the cut target shale sample is subjected to a spontaneous imbibition experiment in the spontaneous imbibition area, and acquiring a first imbibition mass of the imbibed target shale sample from a weighing sensor;
and S206, determining the imbibition efficiency parameter of the artificial fracture on the target shale sample according to the initial drying mass, the initial imbibition mass, the first cutting mass and the first imbibition mass. Wherein, the larger the imbibition efficiency parameter is, the larger the influence of the artificial fracture on the spontaneous imbibition process of the shale is.
The seepage efficiency parameter is used for representing the optimization rate of the seepage efficiency of the artificial fracture on the target shale sample, and the larger the seepage efficiency parameter is, the better the optimization effect of the artificial fracture on the seepage efficiency of the target shale sample is.
According to the method in the embodiment, the controller is used for obtaining the initial drying mass and the initial imbibition mass of the target shale sample when the target shale sample is not cut, the controller is used for obtaining the first cutting mass and the first imbibition mass of the target shale sample, and then the imbibition efficiency parameter of the artificial fracture on the target shale sample is determined according to the initial drying mass, the initial imbibition mass, the first cutting mass and the first imbibition mass, so that the influence of the artificial fracture on the shale imbibition capacity can be quantitatively researched; in addition, as the method provided by the scheme is carried out in the device in any embodiment, the whole device is in a closed environment during experiment, so that experiment errors caused by environment change in the experiment process can be avoided, and the determined imbibition efficiency parameters are more accurate; further, by repeating the steps S202 to S206, a sample is cut, imbibed and dried for multiple times (it can be understood that the time of each imbibition experiment is fixed), and imbibition efficiency parameters of the shale imbibition capacity under various artificial fractures are determined, so that the influence of various artificial fractures on the shale imbibition capacity is researched, and the method provided by the scheme can provide theoretical support for developing fracturing in a shale reservoir.
In some embodiments of the present application, obtaining an initial oven-dry mass and an initial imbibition mass of an uncut target shale sample may include: controlling a drying transition area to dry a target shale sample, and acquiring the initial drying mass of the dried target shale sample from a weighing sensor, wherein the target shale sample is fixed on a movable sample support; and controlling the movable sample support to move the dried target shale sample from the drying transition area to the spontaneous imbibition area, so that the dried target shale sample is subjected to a spontaneous imbibition experiment in the spontaneous imbibition area, and acquiring the initial imbibition mass of the imbibed target shale sample from the weighing sensor. By performing drying and imbibition experiments on the uncut target shale sample, the initial drying mass and the initial imbibition mass of the uncut target shale sample can be obtained.
In some embodiments of the present application, controlling the movable sample holder to move the target shale sample to the drying transition area, so that the target shale sample is subjected to a drying process in the drying transition area, may include: controlling the movable sample support to move the target shale sample to a drying transition area; acquiring the temperature detected by a first temperature sensor; and controlling the first constant temperature controller and the first heat generator to work in a combined manner according to the temperature detected by the first temperature sensor so as to dry the target shale sample at a first preset temperature.
In some embodiments of the present application, controlling the movable sample holder to move the dried target shale sample from the drying transition area to the sample cutting area, so that the sample cutting area scans and cuts the dried target shale sample to form an artificial fracture may include: controlling the movable sample support to move the dried target shale sample from the drying transition area to the sample cutting area; controlling the movable sample support to place the target shale sample in a sample groove of the lifting object stage; controlling a laser scanning cutting instrument to scan the target shale sample in the sample tank, and obtaining a scanning result of the laser scanning cutting instrument; and controlling the lifting object stage to rotate according to the scanning result and controlling the laser scanning cutting instrument to cut the target shale sample so as to form the artificial crack.
In some embodiments of the present application, controlling the movable sample holder to move the cut target shale sample from the drying transition region to the spontaneous imbibition region, so that the cut target shale sample performs a spontaneous imbibition experiment in the spontaneous imbibition region may include: controlling a movable sample support to move the cut target shale sample from a drying transition area to a spontaneous imbibition area; acquiring the temperature detected by the second temperature sensor and the liquid level change of the solution in the container monitored by the liquid level monitor; controlling a second constant temperature controller and a second heater to work in a combined manner according to the temperature detected by a second temperature sensor so as to perform a spontaneous imbibition experiment on the target shale sample at a second preset temperature; and controlling the first liquid level supplier and the second liquid level supplier to supply the solution in the container according to the liquid level change.
In some embodiments of the present application, determining the imbibition efficiency parameter of the artificial fracture for the target shale sample according to the initial drying mass, the initial imbibition mass, the first cutting mass, and the first imbibition mass may include: determining the imbibition efficiency parameter of the artificial fracture on the target shale sample according to the following formula:
wherein, IF1Is a parameter of imbibition efficiency, m'0M is the initial imbibition mass0M is the initial drying mass1Is the first cutting mass, m'1Is the first imbibition mass.
The above method is described below with reference to a specific example, however, it should be noted that the specific example is only for better describing the present application and is not to be construed as limiting the present application.
In this embodiment, the method for determining the imbibition efficiency parameter based on the shale imbibition device integrating imbibition and cutting includes the following steps:
step 1, firstly, opening a first opening control door 21, fixing a target shale sample (a regular shale cube with the length, width and height of 1cm at minimum) on a control clamp 13 of a movable sample rack 10, and then closing the first opening control door 21;
step 2, the controller 50 controls the first constant temperature controller 22 and the first heat generator 23 to work in a combined manner, so that the temperature of the drying transition area 20 is kept at 70 ℃, the drying lasts for more than 48 hours, and then the controller 50 obtains the initial drying mass m of the target shale sample from the weighing sensor 110；
Step 3, the controller 50 opens the second control opening and closing door 31, the telescopic cantilever 12 moves to the position above the container 37 through the sliding groove, the second control opening and closing door 31 is closed, the telescopic cantilever 12 extends, the target shale sample is placed into the solution for spontaneous imbibition experiment, the controller 50 obtains mass reading from the weighing sensor 11 in real time, and after the experiment is carried out for 24 hours, the initial imbibition mass of the target shale sample at the moment is recorded to be m'0；
Step 4, the second control opening and closing door 31 is opened through the controller 50, the telescopic cantilever 12 contracts and moves back to the drying transition area 20 through the sliding chute, the second control opening and closing door 31 is closed, and the drying step in the step 2 is repeated;
step 5, the controller 50 opens the first control opening and closing door 41, the telescopic cantilever 12 places the target shale sample in the sample groove 44 on the liftable object stage 43, the sample groove 44 is controlled to be closed to fix the target shale sample, the control clamp 13 is controlled to be released, the telescopic cantilever 12 retracts, and the first control opening and closing door 41 is closed;
step 6, controlling the liftable object stage 43 to descend to a proper position through the controller 50, controlling the laser scanning cutting instrument 42 to scan the target shale sample, sending the scanning result to the controller 50, determining the obvious crack position according to the scanning result by the controller 50, and selecting different cutting schemes according to natural cracks in different forms;
step 7, rotating the liftable object stage 43 through the controller 50 and moving the laser scanning cutting instrument 42 on the four-sided cross sliding chutes 45, and cutting the target shale sample by the controller 50 at a proper angle according to the selected cutting scheme;
step 8, controlling the lifting object stage 43 to rise through the controller 50, controlling the opening and closing door 41 to open, extending the telescopic cantilever 12, fixing the sample by the control clamp 13, loosening the sample groove 44, lowering the lifting object stage 43, returning the telescopic cantilever 12 to the drying transition area, and controlling the opening and closing door 41 to close;
step 9, obtaining the mass m of the cut target shale sample from the weighing sensor 11 through the controller 501Opening a second control opening and closing door 31, moving the telescopic cantilever 12 to the position above the container 37 along the sliding chute, closing the second control opening and closing door 31, extending the telescopic cantilever 12, lowering the target shale sample into the solution for spontaneous imbibition experiment, obtaining the mass of the target shale sample from the weighing sensor 11 after the experiment is carried out for 24h, and recording the mass of the sample at the moment as m'1；
Step 10, calculating the imbibition efficiency parameter of the artificial crack cut for the 1 st time on the spontaneous imbibition of the shale by the controller:
step 11, repeating the steps 4 to 10 for n times, wherein in each imbibition experiment, the imbibition time is fixed, and the drying quality m after the artificial crack is cut for the nth time can be obtainednThe imbibition mass of the sample after the n-th cut after spontaneous imbibition was m'nCalculating the infiltration optimization efficiency of the artificial crack after the nth cutting on the spontaneous infiltration of the shale as follows:
wherein the imbibition efficiency parameter IFnThe larger the fracture, the greater the effect of the artificial fracture on the spontaneous imbibition process of the shale.
According to the method in the embodiment, the controller is used for obtaining the initial drying mass and the initial imbibition mass of the target shale sample when the target shale sample is not cut, the controller is used for obtaining the first cutting mass and the first imbibition mass of the target shale sample, and then the imbibition efficiency parameter of the artificial fracture on the target shale sample is determined according to the initial drying mass, the initial imbibition mass, the first cutting mass and the first imbibition mass, so that the influence of the artificial fracture on the shale imbibition capacity can be quantitatively researched; further, by repeating the steps 4 to 10, multiple cutting of one sample is realized, and the imbibition efficiency parameter of the shale imbibition capacity under various artificial cracks is determined, so that the influence of various artificial cracks on the shale imbibition capacity is researched, and the influence of heterogeneity can be avoided; in addition, as the method provided by the scheme is carried out in the device in any embodiment, the whole device is in a closed environment during experiment, so that experiment errors caused by environment change in the experiment process can be avoided, and the determined imbibition efficiency parameters are more accurate; because the target shale sample is a cube shale sample with the side length of 1cm, and a larger sample is needed in the prior art, the limit of the sample size to the experiment is greatly reduced in the scheme.
From the above description, it can be seen that the embodiments of the present application achieve the following technical effects: the automatic control of the spontaneous imbibition device is realized through the controller, the sample cutting and imbibition experiments are integrated, after each imbibition experiment is finished, the device can be dried, the processes of cutting, imbibition and drying are repeated again, the cutting and imbibition of one sample can be carried out for multiple times, and the operation is simple; furthermore, the whole device is in a closed environment during the experiment, so that the experiment error caused by the environment change in the experiment process is avoided, and the precision can be improved; furthermore, in the above scheme, the laser scanning cutting instrument is used for scanning the target shale sample, and the controller can accurately control the laser scanning cutting instrument to cut the shale sample according to the scanning result, so that the form of the artificial crack can be accurately controlled, the control of cutting one sample for multiple times can be realized, the influence of a complex artificial crack network on the shale imbibition capacity can be researched, and the influence of heterogeneity can be avoided. The scheme overcomes the defect that the artificial fracture spontaneous imbibition research in the prior art is less, can quantitatively represent the influence of the artificial fracture on the imbibition capacity, and provides theoretical support for developing fracturing in a shale reservoir. By the aid of the scheme, the technical problem that the artificial crack form cannot be accurately controlled in the prior art is solved, and the technical effects of accurately controlling the artificial crack form, improving the precision and efficiency of the imbibition experiment and realizing multiple cutting and imbibition of one sample are achieved.
The embodiment of the present application further provides a computer device, which may specifically refer to a schematic structural diagram of a computer device based on the method for determining the imbibition efficiency parameter provided in the embodiment of the present application shown in fig. 3, where the computer device may specifically include an input device 301, a processor 302, and a memory 303. Wherein the memory 303 is configured to store processor-executable instructions. The processor 302, when executing the instructions, implements the steps of the method for determining the imbibition efficiency parameter based on the imbibition and cutting integrated shale imbibition device described in any of the above embodiments.
In this embodiment, the input device may be one of the main apparatuses for information exchange between a user and a computer system. The input device may include a keyboard, a mouse, a camera, a scanner, a light pen, a handwriting input board, a voice input device, etc.; the input device is used to input raw data and a program for processing the data into the computer. The input device can also acquire and receive data transmitted by other modules, units and devices. The processor may be implemented in any suitable way. For example, the processor may take the form of, for example, a microprocessor or processor and a computer-readable medium that stores computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, an embedded microcontroller, and so forth. The memory may in particular be a memory device used in modern information technology for storing information. The memory may include multiple levels, and in a digital system, the memory may be any memory as long as it can store binary data; in an integrated circuit, a circuit without a physical form and with a storage function is also called a memory, such as a RAM, a FIFO and the like; in the system, the storage device in physical form is also called a memory, such as a memory bank, a TF card and the like.
In this embodiment, the functions and effects of the specific implementation of the computer device can be explained in comparison with other embodiments, and are not described herein again.
The embodiment of the present application further provides a computer storage medium of a method for determining a imbibition efficiency parameter based on an imbibition and cutting integrated shale imbibition device, where the computer storage medium stores computer program instructions, and the computer program instructions, when executed, implement the steps of the method for determining an imbibition efficiency parameter in any of the above embodiments.
In the present embodiment, the storage medium includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), a Cache (Cache), a Hard disk (HDD), or a Memory Card (Memory Card). The memory may be used to store computer program instructions. The network communication unit may be an interface for performing network connection communication, which is set in accordance with a standard prescribed by a communication protocol.
In this embodiment, the functions and effects specifically realized by the program instructions stored in the computer storage medium can be explained by comparing with other embodiments, and are not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different from that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the pending claims along with the full scope of equivalents to which such claims are entitled.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiment of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a shale imbibition device of imbibition cutting integration which characterized in that includes:
the movable sample support is used for fixing a target shale sample so that the target shale sample moves among the drying transition area, the sample cutting area and the spontaneous imbibition area, and a weighing sensor is arranged on the movable sample support and used for detecting the mass of the target shale sample;
the drying transition area is used for drying the target shale sample;
the sample cutting area is used for carrying out laser scanning on the dried target shale sample, sending a scanning result to a controller, and carrying out laser cutting on the target shale sample under the control of the controller so as to form an artificial crack;
the spontaneous imbibition area is used for carrying out an imbibition experiment on the dried target shale sample or the cut target shale sample;
the controller is used for controlling the movable sample support to move so that the target shale sample moves among the drying transition area, the sample cutting area and the spontaneous imbibition area, and is also used for generating a laser cutting instruction according to the scanning result.
2. The apparatus of claim 1, wherein the movable sample holder comprises a retractable cantilever and a control clip disposed at one end of the retractable cantilever, the control clip being configured to hold the target shale sample, the retractable cantilever being retractable and slidable along a predetermined groove to move the target shale sample between the drying transition region, the sample cutting region and the spontaneous imbibition region.
3. The apparatus of claim 1, wherein the drying transition region comprises: the system comprises a first opening control door, a first constant temperature controller, a first heater and a first temperature sensor;
when the first opening control door is opened, the target shale sample enters the drying transition area and is fixed on the movable sample support, the first temperature sensor is used for detecting the temperature in the drying transition area and sending the detected temperature to the controller, and the first constant temperature controller and the first heater are enabled to work under the control of the controller in a combined mode so as to dry the target shale sample at a first preset temperature.
4. The apparatus of claim 1, wherein the sample cutting area comprises: the device comprises a first control opening and closing door, a laser scanning cutting instrument, a liftable objective table and a sliding chute; the liftable object stage can rotate by an angle under the control of the controller, a sample groove for fixing the target shale sample is arranged on the liftable object stage, the laser scanning cutting instrument can move along the sliding groove, and the sliding groove is arranged around the liftable object stage;
after the target shale sample is dried, the controller controls the first control opening and closing door to be opened, controls the movable sample support to enter the sample cutting area through the first control opening and closing door, controls the movable sample support to place the target shale sample in a sample groove of the liftable object stage, and then controls the movable sample support to return to the drying transition area and controls the first control opening and closing door; the laser scanning cutting instrument scans the target shale sample in the sample groove under the control of the controller and sends a scanning result to the controller, and the controller controls the liftable object stage to rotate according to the scanning result and controls the laser scanning cutting instrument to perform laser cutting on the target shale sample so as to form an artificial crack.
5. The apparatus of claim 1, further comprising: the solution replenishing area is connected with the spontaneous imbibition area and the controller and is used for replenishing the solution used for the spontaneous imbibition experiment in the spontaneous imbibition area under the control of the controller;
the spontaneous imbibition region comprises: the second control opening and closing door, the second temperature sensor, the second constant temperature controller, the second heater, the first liquid level supply device, the liquid level monitor and the container; the solution replenishment zone comprises: a solution supply tank and a second liquid level supply; wherein the container and the solution supply tank are used for containing the solution for spontaneous imbibition experiments, and the first liquid level supply device is communicated with the second liquid level supply device so as to supply the solution in the solution supply tank to the container;
the controller controls the second control opening and closing door to be opened so that the movable sample support moves the target shale sample to the spontaneous imbibition area, controls the second control opening and closing door to be closed, and lowers the target shale sample into the solution in the container to perform a spontaneous imbibition experiment; the second temperature sensor is used for detecting the temperature of the spontaneous imbibition region and sending the detected temperature to the controller, and the controller controls the second constant temperature controller and the second heater to jointly cooperate to enable the spontaneous imbibition region to be kept at a second preset temperature according to the received temperature; the liquid level monitor is used for monitoring the liquid level change of the solution in the container and sending the monitored liquid level change to the controller, and the controller controls the first liquid level supply device and the second liquid level supply device to supply the solution in the container according to the liquid level change.
6. A method for determining a imbibition efficiency parameter based on the imbibition and cutting integrated shale imbibition device of any one of claims 1 to 5, comprising:
acquiring the initial drying mass and the initial imbibition mass of an uncut target shale sample;
controlling a movable sample support to move the target shale sample to a drying transition area so that the target shale sample is subjected to drying treatment in the drying transition area;
controlling the movable sample support to move the dried target shale sample from the drying transition area to a sample cutting area, so that the sample cutting area scans and cuts the dried target shale sample to form an artificial crack;
controlling the movable sample support to move the cut target shale sample from the sample cutting area to the drying transition area, and acquiring a first cutting mass of the cut target shale sample from the weighing sensor;
controlling the movable sample support to move the cut target shale sample from the drying transition area to a spontaneous imbibition area, so that the cut target shale sample is subjected to a spontaneous imbibition experiment in the spontaneous imbibition area, and acquiring a first imbibition mass of the imbibed target shale sample from a weighing sensor;
and determining the imbibition efficiency parameter of the artificial fracture on the target shale sample according to the initial drying mass, the initial imbibition mass, the first cutting mass and the first imbibition mass.
7. The method of claim 6, wherein obtaining an initial oven-dry mass and an initial imbibition mass of the uncut target shale sample comprises:
controlling a drying transition area to dry a target shale sample, and acquiring the initial drying mass of the dried target shale sample from a weighing sensor, wherein the target shale sample is fixed on a movable sample support;
and controlling the movable sample support to move the dried target shale sample from the drying transition area to the spontaneous imbibition area, so that the dried target shale sample is subjected to a spontaneous imbibition experiment in the spontaneous imbibition area, and acquiring the initial imbibition mass of the imbibed target shale sample from the weighing sensor.
8. The method of claim 6, wherein controlling the movable sample holder to move the target shale sample to a drying transition area such that the target shale sample is subjected to a drying process at the drying transition area comprises:
controlling a movable sample support to move the target shale sample to the drying transition area;
acquiring the temperature detected by a first temperature sensor;
controlling a first constant temperature controller and a first heat generator to work in a combined manner according to the temperature detected by the first temperature sensor so as to dry the target shale sample at a first preset temperature; and/or
Controlling the movable sample support to move the dried target shale sample from the drying transition area to a sample cutting area, so that the sample cutting area scans and cuts the dried target shale sample to form an artificial fracture, and the method comprises the following steps:
controlling the movable sample support to move the dried target shale sample from the drying transition area to a sample cutting area;
controlling the movable sample support to place the target shale sample in a sample slot of a lifting stage;
controlling a laser scanning cutting instrument to scan the target shale sample in the sample tank, and obtaining a scanning result of the laser scanning cutting instrument;
and controlling the lifting object stage to rotate according to the scanning result and controlling the laser scanning cutting instrument to cut the target shale sample so as to form an artificial crack.
9. The method of claim 6, wherein controlling the movable sample holder to move the cut target shale sample from the drying transition region to a spontaneous imbibition region so that the cut target shale sample undergoes a spontaneous imbibition test in the spontaneous imbibition region comprises:
controlling the movable sample support to move the cut target shale sample from the drying transition area to the spontaneous imbibition area;
acquiring the temperature detected by the second temperature sensor and the liquid level change of the solution in the container detected by the liquid level monitor;
controlling a second constant temperature controller and a second heater to work in a combined manner according to the temperature detected by the second temperature sensor so as to perform a spontaneous imbibition experiment on the target shale sample at a second preset temperature; controlling a first liquid level supplier and a second liquid level supplier to supply the solution in the container according to the liquid level change; and/or
Determining a imbibition efficiency parameter of the artificial fracture for the target shale sample according to the initial drying mass, the initial imbibition mass, the first cutting mass, and the first imbibition mass, including:
determining the imbibition efficiency parameter of the artificial fracture on the target shale sample according to the following formula:
wherein, IF1Is the imbibition efficiency parameter, m'0M is the initial imbibition mass0M is the initial drying mass1Is the first cutting mass, m'1Is the first imbibition mass.
10. A computer device comprising a processor and a memory for storing processor-executable instructions which, when executed by the processor, implement the steps of the method of any one of claims 6 to 9.
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| CN112414884B (en) * | 2020-11-06 | 2021-08-27 | 中国石油大学(北京) | Shale dynamic imbibition device and method for determining dynamic imbibition influence result |
| CN112461731A (en) * | 2020-12-04 | 2021-03-09 | 南京东南大学城市规划设计研究院有限公司 | Detection apparatus for detect rainwater permeability of mating formation that permeates water |
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| CN102252951B (en) * | 2011-07-14 | 2013-03-06 | 中国科学院武汉岩土力学研究所 | High-temperature fractured rock mass permeation test device and method |
| CN102706786B (en) * | 2012-06-14 | 2015-12-02 | 中国海洋石油总公司 | A kind of dynamic shale pore pressure transmission tester |
| CN104101563B (en) * | 2014-07-10 | 2017-02-15 | 中国石油大学(北京) | Portable spontaneous imbibition measuring device |
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