CN112443288B - Experimental device for evaluating sealing capacity of two interfaces of well cementation cement sheath - Google Patents
Experimental device for evaluating sealing capacity of two interfaces of well cementation cement sheath Download PDFInfo
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- CN112443288B CN112443288B CN201910739318.4A CN201910739318A CN112443288B CN 112443288 B CN112443288 B CN 112443288B CN 201910739318 A CN201910739318 A CN 201910739318A CN 112443288 B CN112443288 B CN 112443288B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention provides an experimental device for evaluating sealing capability of two interfaces of a well cementation cement sheath, which comprises a shaft assembly module, a fluid injection circulation module, a fluid flow module, a water channeling module, a fluid pressurizing module and a temperature control module. The fluid injection circulation module, the fluid flow module, the water channeling module, the fluid pressurizing module and the temperature control module are respectively connected with the shaft assembly module. The experimental device for evaluating the sealing capability of the two interfaces of the cement sheath of the well cementation can effectively simulate the underground fluid environment before and after well cementation, the stress state of the cement sheath and the morphological characteristics of the two interfaces of the cement sheath, so that the long-acting sealing capability of the two interfaces of the cement sheath in the stratum fluid environment can be evaluated, and guidance and reference can be provided for optimizing an interface-reinforced cement slurry system and perfecting the related well cementation process.
Description
Technical Field
The invention belongs to the technical field of petroleum exploration, and particularly relates to an experimental device for evaluating sealing capability of two interfaces of a well cementation cement sheath.
Background
In the petroleum industry, well cementation is an important link in the well construction process of oil and gas wells. Cementing is the injection of cement slurry into the annulus between the wellbore and casing through a casing string at the surface using equipment such as a cement pump truck. The purpose of which is to protect and suspend the casing; complex stratum such as loose, easy-to-leak, easy-to-collapse is sealed and isolated; sealing and isolating oil, gas and water layers to prevent mutual channeling; installing a wellhead, controlling downhole fluids to facilitate subsequent drilling and production. With the continued development of oil and gas exploration, wellbore seal integrity is becoming an increasingly important concern for drilling. Because the cement sheath has the characteristics of high strength, low permeability and the like, a channeling channel is not easy to form, and the sealing capacity of the shaft is mainly determined by a first interface formed by the casing pipe and the cement sheath and a second interface formed by the cement sheath and the stratum. During the drilling process, the well wall rock is in a well drilling liquid circulation or soaking environment for a long time, and due to the penetration effect of the well wall, the well drilling liquid can form a layer of mud cake on the well wall, so that the well drilling liquid is prevented from further penetrating into the stratum. Compared with the smooth casing surface, in the cementing process, mud cakes on the well wall are difficult to clean, so that the cementing quality of a cementing second interface is affected, and the sealing capacity of a well shaft after cementing is greatly dependent on the cementing quality of the cementing second interface.
With the continuous development of oil and gas exploration to unconventional and ultra-deep layers, the situation that oil and gas drilling meets complex stratum is more and more increased. When the drill encounters an active water layer or an air layer, the cement sheath is eroded due to the effects of soaking, scouring and the like of the fluid on the cement sheath, calcium ions in the cement sheath are carried away due to the scouring effect, and cement slurry hydration products are changed, so that the cementing quality of a second interface of the cement sheath is reduced, and therefore, the sealing capability of the second interface of the cement sheath in a dynamic-static fluid environment is required to be researched and evaluated. At present, the problem of insufficient research on the evolution mechanism of the sealing capability of the cement sheath two interfaces in a dynamic and static fluid environment exists.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an experimental device capable of simulating the evolution process of the sealing capability of the two interfaces of the well cementing ring under the dynamic and static fluid maintenance condition, so that the interface degradation mechanism of the oil-containing gas-water layer can be revealed, and guidance and reference are provided for optimizing an interface reinforced cement slurry system and perfecting the related well cementing process.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an experimental device for evaluating sealing capability of two interfaces of a well cementation cement sheath comprises a shaft assembly module, a fluid injection circulation module, a fluid flow module, a water channeling module, a fluid pressurizing module and a temperature control module. The fluid injection circulation module, the fluid flow module, the water channeling module, the fluid pressurizing module and the temperature control module are respectively connected with the shaft assembly module.
According to the experimental device for evaluating the sealing capability of the two interfaces of the solid well cement sheath, disclosed by the invention, the operation such as drilling fluid circulation, pre-fluid flushing, cement slurry displacement and the like can be performed on a shaft assembly module of an analog shaft by using a fluid injection circulation module system, so that a mud cake is formed on a simulated well wall, and the in-situ actual well drilling, well cementation and other underground environments can be simulated. The steel pipe is inserted into the center of the shaft, the core and the cement sheath are hung on the steel pipe after cement is solidified, and the shearing action of the sleeve hanging on the cement sheath on the two interfaces of the cement sheath in the actual shaft can be simulated. The cement sheath-simulated well bore-simulated stratum assembly is placed in a dynamic or static fluid maintenance environment, so that the effects of soaking and flushing of stratum fluid on the two interfaces of the cement sheath and the morphological characteristics of the two interfaces of the cement sheath can be simulated in an actual well bore. Therefore, the long-acting sealing capability of the two interfaces of the cement sheath can be evaluated in the stratum fluid environment, and guidance and reference can be provided for the optimization of an interface reinforced cement slurry system and the perfection of a related well cementation process.
Further improvements to the above described solution are possible as follows.
According to the experimental device for evaluating the sealing capability of the two interfaces of the well cementing ring, in a preferred embodiment, a shaft assembly module comprises a kettle body and kettle covers arranged at two ends of the kettle body. The kettle body is internally provided with a solid drill natural rock core with a through hole.
The method has the advantages that the wellbore and the stratum are simulated by adopting the real-drilling natural rock core, the cement ring outer annular surface and the rock core inner annular surface form the cement ring two interfaces together, and compared with the two interfaces formed by the rock core outer annular surface and the cement ring inner annular surface which are conventionally adopted, the cement ring two interfaces better conform to the morphological characteristics of the cement ring two interfaces in the actual wellbore.
Further, in a preferred embodiment, a rubber gasket is arranged between the kettle cover and the natural rock core of the solid drill.
Through setting up rubber gasket, can effectively prevent to produce the grout leakage in the experimentation.
Further, in a preferred embodiment, the kettle cover is provided with a press cap assembly.
Through setting up and pressing the cap subassembly, can make the connection of each module simple convenient in the experimental operation process to can effectively avoid producing in the experimental process and leak.
In particular, in a preferred embodiment, the fluid injection circulation module comprises a first container and a second container for storing the injection circulation fluid, the first container and the second container being interconnected by a control valve. The first container is connected with the shaft assembly module through a control valve, and a hydraulic pump is arranged at the outlet of the first container. The second vessel is connected to the wellbore assembly module by a control valve.
The fluid injection circulation module with the structural form can effectively realize operations such as drilling fluid circulation, front-end fluid flushing, cement slurry displacement and the like on the shaft assembly module of the simulated shaft, form mud cakes on the simulated well wall and simulate in-situ actual drilling, well cementation and other underground environments.
In particular, in a preferred embodiment, the temperature control module includes a heating component, a temperature measurement probe, and a processing unit coupled to the heating component, the temperature measurement probe, respectively, disposed within the wellbore assembly module.
The heating component is controlled through the cooperation of the processing unit and the temperature measuring probe, so that the temperature required by the maintenance of cement paste and static fluid environment can be set extremely conveniently, the real-time temperature control on the experimental environment is facilitated, and the accuracy of experimental data can be effectively ensured.
Specifically, in a preferred embodiment, the fluid pressurizing module includes a third container for containing the curing fluid. The third container is connected with the shaft assembly module through a hydraulic pump and a bidirectional control valve, and a pressure gauge is arranged on an injection pipeline between the bidirectional control valve and the shaft assembly module.
The fluid pressurizing module in the structural form can extremely conveniently set the pressure required by the maintenance of cement paste and static fluid environment, and the experimental pressure can be conveniently known and regulated in real time through the pressure gauge.
In particular, in a preferred embodiment, the fluid flow module comprises a fourth container for containing a curing fluid. The fourth container is connected with the shaft assembly module through a hydraulic pump and a control valve. A pressure gauge and a flow meter are arranged on the pipeline between the control valve and the shaft assembly module.
The fluid flow module in the structural form can extremely conveniently complete maintenance of a dynamic fluid environment in the experimental process, and the accuracy of the whole experimental process can be conveniently controlled through the pressure gauge and the flowmeter.
Specifically, in a preferred embodiment, the water channeling module comprises a fifth container for containing a fluid and a high pressure gas cylinder. The fifth container and the high-pressure gas cylinder are connected with the shaft assembly module through the control valve. A hydraulic pump is arranged between the fifth container and the control valve. A pressure gauge and a flow meter are arranged on the pipeline between the control valve and the shaft assembly module.
The running water blowby gas blowby module in the structure can extremely conveniently and accurately complete a water blowby or gas blowby simulation experiment, and the accuracy of the whole experiment process can be conveniently controlled through the pressure gauge and the flowmeter.
Further, in a preferred embodiment, the fluid pressurization module, the fluid flow module, and the water channeling module each include a safety valve that is coupled to the wellbore assembly module.
Through setting up the relief valve, can realize the air emission of cement paste weather in-process of injecting into the fluid in-process to and under the condition that fluid pressure exceeded relief valve settlement pressure, the relief valve can open the pressure release voluntarily and ensure experimental environment safety.
Compared with the prior art, the invention has the advantages that: the method can effectively simulate the underground fluid environment before and after well cementation, the stress state of the cement sheath and the morphological characteristics of the two interfaces of the cement sheath, so that the long-acting sealing capability of the two interfaces of the cement sheath in the stratum fluid environment can be evaluated, and guidance and reference can be provided for optimizing an interface reinforced cement slurry system and perfecting the related well cementation process.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 schematically shows the overall frame structure of an experimental apparatus according to an embodiment of the invention;
fig. 2 to 5 schematically show the connection of the experimental device according to the embodiment of the invention during the experimental process.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will now be described in further detail with reference to the drawings and the specific examples, which are not intended to limit the scope of the invention.
Fig. 1 schematically shows the overall frame structure of an experimental set-up 10 in accordance with an embodiment of the present invention. Fig. 2 to 5 schematically show how the experimental set-up 10 according to an embodiment of the invention is connected during an experiment.
As shown in fig. 1, an experimental device 10 for evaluating sealing capability of two interfaces of a cement sheath for well cementation according to an embodiment of the present invention includes a wellbore assembly module 1, a fluid injection circulation module 2, a fluid flow module 3, a water channeling module 4, a fluid pressurizing module 5 and a temperature control module 6. Wherein the fluid injection circulation module 2, the fluid flow module 3, the water channeling module 4, the fluid pressurizing module 5 and the temperature control module 6 are respectively connected with the shaft assembly module 1. According to the experimental device for evaluating the sealing capability of the two interfaces of the solid cement sheath, disclosed by the embodiment of the invention, the operation such as drilling fluid circulation, pre-fluid flushing, cement paste displacement and the like can be performed on a shaft assembly module of an analog shaft by using a fluid injection circulation module system, so that a mud cake is formed on a simulated well wall, and the in-situ actual downhole environments such as drilling and well cementation can be simulated. The steel pipe is inserted into the center of the shaft, the core and the cement sheath are hung on the steel pipe after cement is solidified, and the shearing action of the sleeve hanging on the cement sheath on the two interfaces of the cement sheath in the actual shaft can be simulated. Through the fluid flow module, the water channeling module, the fluid pressurizing module and the temperature control module, the cement sheath-simulated well bore-simulated stratum assembly is placed in a dynamic or static fluid maintenance environment, so that the effects of the stratum fluid on soaking and flushing of the cement sheath interface and the like and the morphological characteristics of the cement sheath interface can be simulated in an actual well bore. Therefore, the long-acting sealing capability of the two interfaces of the cement sheath can be evaluated in the stratum fluid environment, and guidance and reference can be provided for the optimization of an interface reinforced cement slurry system and the perfection of a related well cementation process.
As shown in fig. 2, the experimental apparatus 10 for evaluating sealing ability of two interfaces of a cement sheath for well cementation according to the present invention, preferably, the well assembly module 1 includes a tank body 11 and tank covers 12 disposed at both ends of the tank body 11. The kettle body 11 is internally provided with a solid drill natural rock core 13 with a through hole. The method has the advantages that the wellbore and the stratum are simulated by adopting the real-drilling natural rock core, the cement ring outer annular surface and the rock core inner annular surface form the cement ring two interfaces together, and compared with the two interfaces formed by the rock core outer annular surface and the cement ring inner annular surface which are conventionally adopted, the cement ring two interfaces better conform to the morphological characteristics of the cement ring two interfaces in the actual wellbore. Preferably, for facilitating experimental operations, the through hole center of the real drill natural core 13 is provided with an injection pipe 106 or a simulation casing 107. Further, in the present embodiment, as shown in fig. 2 to 5, a rubber gasket 14 is disposed between the tank cover 12 and the natural core 13. Through setting up rubber gasket, can effectively prevent to produce the grout leakage in the experimentation. Further, in this embodiment, the kettle cover 12 is provided with a press cap assembly 15. Through setting up and pressing the cap subassembly, can make the connection of each module simple convenient in the experimental operation process to can effectively avoid producing in the experimental process and leak.
Specifically, as shown in fig. 2, in the present embodiment, the fluid injection circulation module 2 includes a first container 21 and a second container 22 for storing an injection circulation fluid 23, and the first container 21 and the second container 22 are connected to each other through a control valve 7. The first reservoir 21 is connected to the wellbore assembly module 1 via a control valve 7 and a hydraulic pump 8 is provided at the outlet of the first reservoir 21. The second container 22 is connected to the wellbore assembly module 1 via a control valve 7. The fluid injection circulation module with the structural form can effectively realize operations such as drilling fluid circulation, front-end fluid flushing, cement slurry displacement and the like on the shaft assembly module of the simulated shaft, form mud cakes on the simulated well wall and simulate in-situ actual drilling, well cementation and other underground environments.
As shown in fig. 3, specifically, in the present embodiment, the temperature control module 6 includes a heating member 61, a temperature measurement probe 62, and a processing unit 63 connected to the heating member 61, the temperature measurement probe 62, respectively, disposed within the tank body 11. The heating component is controlled through the cooperation of the processing unit and the temperature measuring probe, so that the temperature required by the maintenance of cement paste and static fluid environment can be set extremely conveniently, the real-time temperature control on the experimental environment is facilitated, and the accuracy of experimental data can be effectively ensured. Preferably, the heating element 61 is a heating coil disposed within the tank 11 and the temperature measuring probe 62 is a thermocouple disposed within the fill tube 108. Specifically, in the present embodiment, the fluid pressurizing module 5 includes a third container 51 for containing the curing fluid. The third vessel 51 is connected to the wellbore assembly module 1 via a hydraulic pump 8 and a bi-directional control valve 9, and a pressure gauge 101 is provided in the injection line between the bi-directional control valve 9 and the wellbore assembly module 1. The fluid pressurizing module in the structural form can extremely conveniently set the pressure required by the maintenance of cement paste and static fluid environment, and the experimental pressure can be conveniently known and regulated in real time through the pressure gauge.
Specifically, in the present embodiment, as shown in fig. 4, the fluid flow module 3 includes a fourth container 31 for containing a curing fluid. The fourth reservoir 31 is connected to the wellbore assembly module 1 via a hydraulic pump 8, a control valve 7. A pressure gauge 101 and a flow meter 102 are provided in the line between the control valve 7 and the wellbore assembly module 1. The fluid flow module in the structural form can extremely conveniently complete maintenance of a dynamic fluid environment in the experimental process, and the accuracy of the whole experimental process can be conveniently controlled through the pressure gauge and the flowmeter.
Specifically, in the present embodiment, as shown in fig. 5, the water blowby module 4 includes a fifth container 41 for containing a fluid and a high-pressure gas cylinder 42. The fifth vessel 41 and the high pressure gas cylinder 42 are each connected to the wellbore assembly module 1 via a control valve 7. A hydraulic pump 8 is provided between the fifth tank 41 and the control valve 7. A pressure gauge 101 and a flow meter 102 are provided in the line between the control valve 7 and the wellbore assembly module 1. The running water blowby gas blowby module in the structure can extremely conveniently and accurately complete a water blowby or gas blowby simulation experiment, and the accuracy of the whole experiment process can be conveniently controlled through the pressure gauge and the flowmeter.
As shown in fig. 3 to 4, further, in the present embodiment, the fluid pressurizing module 5, the fluid flow module 3, and the water channeling module 4 each include a safety valve 103, and the safety valve 103 is connected to the wellbore assembly module 1. Through setting up the relief valve, can realize the air emission of cement paste weather in-process of injecting into the fluid in-process to and under the condition that fluid pressure exceeded relief valve settlement pressure, the relief valve can open the pressure release voluntarily and ensure experimental environment safety.
As shown in fig. 2 to 5, the experimental procedure of the experimental apparatus 10 for evaluating the sealing capability of two interfaces of a cement sheath for a well according to the embodiment of the present invention is as follows:
step one, preparing a simulated shaft: firstly, a coring bit is utilized to obtain a target rock stratum real drilling core 13, and an electric drill is utilized to drill a through hole in the center of the real drilling core 13;
step two, assembling the shaft assembly module 1 and the fluid injection circulation module 2: coating the upper end surface of the rubber gasket 14 with mold release oil, and putting the mold release oil into the cylindrical kettle body 11; then placing a natural rock core 13 with a through hole in a cylindrical kettle body 11, smearing mold release oil on the lower end of a rubber gasket 14 with a small hole in the center, placing the mold release oil on the upper end of the natural rock core 13 with the natural rock core, assembling equipment as shown in fig. 2, and connecting a fluid injection circulation module 2 with a shaft assembly module 1;
step three, simulating the downhole fluid environment before well cementation: simulating a downhole fluid environment before cementing, firstly injecting drilling fluid through an injection pipe 106, circulating for 6-10 hours, then standing a simulated shaft in a drilling fluid soaking environment for 3-6 hours, and finally recycling the drilling fluid for 3-6 hours;
simulating a cementing process: injecting flushing fluid into the simulated well bore through the injection pipe 106 for 3-6 weeks, then using the pre-fluid for 5-8 weeks, and finally injecting cement slurry with the volume of 5-8 times of the well bore for displacement;
step five, cement paste 109 is prepared: disassembling the fluid injection circulation module 2, and taking out the rubber pad 14 at the upper end of the cylindrical kettle body 11; as shown in fig. 3, the wellbore assembly module 1 is connected with the fluid pressurizing module 5 and the temperature control module 6, the maintenance fluid 104 is injected into the cylindrical tank body 11 through the left side passage of the press cap assembly 15 through the injection line, and the safety valve 103 is opened to perform air discharge during the injection of the fluid. The maintenance fluid 104 may be purified water, brackish water, high pressure gas, etc., the type of which depends on the actual formation fluid environment. After the injection is finished, the safety valve 103 is closed, at this time, the safety valve 103 is in a pressure limiting working state, and if the fluid pressure exceeds the set pressure of the safety valve 103, the safety valve 103 automatically opens for pressure relief. Finally, setting the curing temperature and the fluid pressure, and curing for 24-72h under the given pressure and temperature conditions; preferably, setting the pressure to 10MPa and the temperature to 60 ℃, and standing the cement paste for 48 hours;
step six, maintaining a static fluid environment: continuing to maintain after finishing the curing, wherein the curing age is 3d, 5d, 7d, 15d, 30d, 60d, 120d, 180d and 360d, and the curing age can be adjusted according to actual research requirements;
step seven, maintaining a dynamic fluid environment: closing the two-way control valve 9, opening the safety valve 103 for pressure relief, disassembling the kettle cover 12 at the lower end of the kettle body 11, and taking out the rubber gasket 14, wherein the cement is completely solidified at the moment; the cement sheath 105 and the core 13 are suspended integrally above a simulated casing 107, as shown in fig. 4, connecting the fluid flow module 3 with the wellbore assembly module 1. The control valve 7 is opened, the left valve of the bidirectional control valve 9 is closed, the upper valve of the bidirectional control valve 9 is opened, under the control of the hydraulic pump 8, the curing fluid 104 enters the kettle body 11 through the pipeline, the drill core 13 and the cement sheath 105 are flushed, finally, the curing fluid returns to the third container 51 through the return pipeline 108, the upstream pressure can be set through the hydraulic pump 8, the downstream pressure and the flow can be set through the opening degree of the control valve 7, and the upstream pressure, the downstream pressure and the flow can be respectively obtained through reading the readings of the pressure gauge 101 and the flow meter 102. The flowing maintenance age can be set to 3d, 5d, 7d, 15d, 30d, 60d, 120d, 180d, 360d and the like according to actual research requirements; preferably, curing is carried out for 7 days under the conditions of 10MPa of upstream pressure, 9.5MPa of downstream pressure and 60 ℃ of temperature, and the reading of the flowmeter is 1.8L/min;
step eight, water channeling simulated detection: disassembling the fluid flow module 3, smearing sealing oil on the upper end surface of a rubber gasket 14 with a large hole in the center, and placing the sealing oil on the lower end of a solid drill core 13, wherein the diameter of the center hole is slightly larger than that of a simulated shaft; as shown in fig. 5, the water channeling module 4 is connected with the shaft assembly module 1, by means of compacting the rubber gasket 14 by the kettle cover 12 at the lower end of the kettle body 11, the contact surfaces between the rubber gasket 14 and the kettle cover 12 at the lower end of the kettle body 11 and the rubber gasket 14 as well as between the rubber gasket 14 and the drill core 13 are sealed, so that a cylindrical sealed space is formed, water channeling or gas channeling fluid can only pass through the simulated shaft along the cement sheath 105 or the two interfaces, and the water channeling or gas channeling fluid can only pass through the shaft into the third container 51 by breaking the two interfaces in a short time due to extremely low permeability of the cement sheath 105, and the channeling or gas channeling simulation can be performed by using the fluid in the fifth container 41 or the gas in the high-pressure gas cylinder 42. Preferably, the high-pressure carbon dioxide is used as a gas source for gas channeling monitoring, and when the upstream pressure reaches 7.2MPa, bubbles begin to emerge in the third container 51, which indicates that gas channeling occurs at the two interfaces, and the gas channeling pressure is 7.2MPa.
According to the embodiment, the experimental device for evaluating the sealing capability of the two interfaces of the cement sheath of the well cementation can effectively simulate the underground fluid environment before and after well cementation, the stress state of the cement sheath and the appearance characteristics of the two interfaces of the cement sheath, so that the long-acting sealing capability of the two interfaces of the cement sheath in the stratum fluid environment can be evaluated, and guidance and reference can be provided for optimizing an interface reinforced cement slurry system and improving the related well cementation process.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (7)
1. An experimental device for evaluating sealing capability of two interfaces of a well cementation cement sheath in a dynamic and static fluid environment, wherein the two interfaces of the well cementation cement sheath consist of an outer ring surface of the cement sheath and an inner ring surface of a core,
the experimental device is characterized by comprising a shaft assembly module, a fluid injection circulation module, a fluid flow module, a water channeling air channeling module, a fluid pressurizing module and a temperature control module; wherein the fluid injection circulation module, the fluid flow module, the water channeling module, the fluid pressurization module, and the temperature control module are respectively connected with the wellbore assembly module;
the shaft assembly module comprises a kettle body, an upper kettle cover and a lower kettle cover which are arranged at two ends of the kettle body, wherein a real drilling natural rock core with a through hole is arranged in the kettle body, and an upper rubber gasket and a lower rubber gasket are respectively arranged between the upper kettle cover and the lower kettle cover and between the upper kettle cover and the real drilling natural rock core;
the fluid injection circulation module comprises a first container and a second container which are used for storing injection circulation fluid, the first container and the second container are connected with each other through a control valve, the first container is connected with the shaft assembly module through the control valve, a hydraulic pump is arranged at the outlet of the first container, and the second container is connected with the shaft assembly module through the control valve;
the fluid pressurizing module comprises a third container for containing maintenance fluid, the third container is connected with the shaft assembly module through a first hydraulic pump and a two-way control valve, and a first pressure gauge is arranged on an injection pipeline between the two-way control valve and the shaft assembly module;
the fluid flow module comprises a fourth container for containing maintenance fluid, and the fourth container is connected with the shaft assembly module through a second hydraulic pump and a control valve; a second pressure gauge and a flow meter are arranged on a pipeline between the control valve and the shaft assembly module;
the fluid injection circulation module is used for simulating a downhole fluid environment before well cementation and simulating a well cementation and cement injection process, the upper rubber gasket is taken out, cement slurry curing and static fluid environment maintenance are achieved through the fluid pressurizing module and the temperature control module, the lower rubber gasket is taken out, dynamic fluid environment maintenance is achieved through the fluid flow module, the lower rubber gasket with a large hole in the center is installed, water channeling simulated detection is carried out through the water channeling module, and therefore the sealing capacity of two interfaces of a well cementation cement ring under the dynamic and static fluid environment is evaluated.
2. The experimental set-up of claim 1, wherein the wellbore assembly module comprises a tank body and tank caps disposed at both ends of the tank body; the kettle body is internally provided with a solid-drilling natural rock core with a through hole.
3. The experimental device of claim 2, wherein rubber gaskets are arranged between the kettle cover and the solid drill natural core.
4. An experimental device according to claim 2 or 3, wherein the kettle cover is provided with a press cap assembly.
5. A testing device according to any one of claims 1 to 3, wherein the temperature control module comprises a heating member arranged within the wellbore assembly module, a temperature measurement probe and a processing unit connected to the heating member, the temperature measurement probe, respectively.
6. A test device according to any one of claims 1 to 3, wherein the water channeling module comprises a fifth container for containing a fluid and a high pressure gas cylinder; the fifth container and the high-pressure gas cylinder are connected with the shaft assembly module through control valves; a hydraulic pump is arranged between the fifth container and the control valve; a pressure gauge and a flow meter are provided on the pipeline between the control valve and the wellbore assembly module.
7. A test device according to any one of claims 1 to 3, wherein the fluid pressurization module, the fluid flow module and the water blow-by module each comprise a safety valve, the safety valve being connected to the wellbore assembly module.
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