CN203570309U - Leaking stopping and pressure-bearing capability evaluation device of fractured leaky stratum - Google Patents
Leaking stopping and pressure-bearing capability evaluation device of fractured leaky stratum Download PDFInfo
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- CN203570309U CN203570309U CN201320704682.5U CN201320704682U CN203570309U CN 203570309 U CN203570309 U CN 203570309U CN 201320704682 U CN201320704682 U CN 201320704682U CN 203570309 U CN203570309 U CN 203570309U
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Abstract
A leaking stopping and pressure-bearing capability evaluation device of a fractured leaky stratum comprises that a fractured natural rock sample is placed on an experimental platform of a true triaxial leaking stopping simulation system, jack pressure plates are arranged at the bottom and the side walls of the fractured natural rock sample, a top interface pressing plate is arranged on the top portion of the fractured natural rock sample, a simulate well hole is connected with the upper end of the fractured natural rock sample, a mud separator comprises an outer cylinder and a piston, the lower end of the outer cylinder is connected with the top interface pressing plate, a liquid outlet hole is formed in the bottom of the outer cylinder, the liquid outlet hole is connected with a connecting cylinder, the connecting cylinder penetrates through one end of the top interface pressing plate and is connected with the simulate well hole, and an acoustic emission monitor provides a plurality of acoustic emission probes which are arranged on the side wall horizontally opposite to the fractured natural rock sample. The leaking stopping and pressure-bearing capability evaluation device of the fractured leaky stratum can simulate the pressure-bearing and leaking stopping process of a leakage path and leaking stopping materials of the fractured leaky stratum in the real stratum environment, and a theoretical basis is provided for a leaking stopping mechanism of improving the pressure-bearing capability of the fractured leaky stratum and field application researches.
Description
Technical field
The utility model is relevant for a kind of bearing capacity evaluating apparatus, especially relevant for a kind of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus.
Background technology
Leakage problem is the Important Project technical barrier of puzzlement oil exploration, exploitation always, fails so far to solve completely.The loss that leakage problem causes to petroleum industry every year, up to multi-billion dollar, comprises the accident of all kinds of complexity and incurs loss through delay and produce the loss causing.Wherein, the leakage of fractured reservoir is the most general leakage type, and complexity is strong and be difficult to solve, and makes leakage problem more complicated and be difficult to control.
In the operation of fracture development strata drilling, often occur that initial wastage is little, drop ply position uncertain multiple spot leakage again, often can there is same well section situation stifled, that repeatedly leak repeatedly.The reason that causes above-mentioned repeatability leakage to occur, the one, the factor of formation condition, the 2nd, the stress sensitivity on stratum can cause leakage channel closure and open, and the 3rd, the uncertainty of leakage scope.Leakage reason in fractured reservoir, normally due to the fracture pressure gradient of mud density in well higher than stratum, causes the intrinsic fracture in stratum restart or expand, but also can in stratum, produce inductivity crack, causes that mud misses in stratum in a large number.Therefore,, once leakage problem occurs on Deep Fractures stratum, the cycle of lose returns, difficulty long, that plugging operations faces was also more.
The domestic and international sealing Analog Device adopting for the leakage of fractured reservoir is mainly by man-made fracture, to carry out the leakage channel of simulated formation at present, this class sealing Analog Device can not reflect the fracture pattern feature in true stratum on the one hand, on the other hand also cannot simulates real triaxial stress under the Process of Leaking Stoppage of loss circulation material.Therefore, there is larger gap in resulting experimental result and on-the-spot application result, cannot carry out effectively evaluating to the leak stopping situation under actual formation condition.
Therefore, be necessary to provide a kind of novel leak stopping evaluation device for fractured reservoir leakage, overcome above-mentioned defect.
Utility model content
The purpose of this utility model is to provide a kind of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus, its can Reality simulation ground environment under the leakage channel on Fractured leakiness stratum and the pressure-bearing Process of Leaking Stoppage of loss circulation material, the plugging mechanism and the on-the-spot application study that for Fractured leakiness stratum, improve bearing capacity provide theoretical foundation.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
The utility model provides a kind of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus, and described Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus comprises:
True three axle leakage blockage simulation systems, it has experiment porch, on described experiment porch, be placed with the natural rock sample of Fractured, bottom and all sidewalls of the natural rock sample of described Fractured are respectively arranged with very heavy pressure plare, described very heavy pressure plare is connected with stabilizing hydraulic pressure source, the top of the natural rock sample of described Fractured is provided with end face pressing plate, and described end face pressing plate is connected with described experiment porch, and the upper end of the natural rock sample of described Fractured is connected with simulation wellbore hole;
Mud separator, it has urceolus and is arranged on the piston in described urceolus, and the lower end of described urceolus is connected with described end face pressing plate, and the bottom of described urceolus has fluid hole, described fluid hole is connected with connecting cylinder, and one end that described connecting cylinder passes described end face pressing plate is connected with described simulation wellbore hole;
Acoustic emission automonitor, it has a plurality of acoustic emission probes, and described a plurality of acoustic emission probes are arranged on the relative sidewall of the natural rock sample level of described Fractured.
In a preferred embodiment, the natural rock sample of described Fractured is the square bodily form, and its upper end offers a uncased wellbore downwards, and described simulation wellbore hole has upper well section and the section of going into the well being connected, described upper well section is connected with described connecting cylinder, described in the section of going into the well be connected with described uncased wellbore.
In a preferred embodiment, the lower end of described connecting cylinder is provided with valve switch.
In a preferred embodiment, on the urceolus upper end sidewall of described mud separator, offer inlet opening, described inlet opening is connected with a servo-hydraulic pressurization system.
In a preferred embodiment, described acoustic emission probe is eight, and the natural rock sample level of described Fractured is respectively equipped with four described acoustic emission probes on relative two side.
In a preferred embodiment, described four acoustic emission probes are separately positioned on four drift angle places of the natural rock sample sidewall of described Fractured.
In a preferred embodiment, described stabilizing hydraulic pressure source has three stabilizing hydraulic pressure pumps, wherein two described stabilizing hydraulic pressure pumps respectively two described very heavy pressure plares on the two side relative with being arranged on the natural rock sample level of described Fractured be connected, described in another, stabilizing hydraulic pressure pump is connected with the described very heavy pressure plare that is arranged on the natural rock sample of described Fractured bottom.
Feature and the advantage of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus of the present utility model are: this Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus, by the stratum force environment under simulates real condition of triaxial stress, adopt the natural rock sample of Fractured to evaluate the pressure-bearing plugging effect on loss circulation material fracture leakiness stratum under high temperature and high pressure environment, for the leakage mechanism on Fractured leakiness stratum and the research of Fractured leakiness stratum pressure-bearing leak stopping mechanical mechanism are laid a good foundation, in experimentation, utilize acoustic emission probe can monitor the signal that breaks of the natural rock sample of Fractured inside, and the position of the signal that breaks is positioned, the Real-Time Monitoring of realization to loss circulation material pressure-bearing Process of Leaking Stoppage, and then evaluate the plugging effect of different loss circulation materials to leakage channel, in addition, by being connected to the temperature controller of mud separator lower end, can realize the heating to the plugging slurry in mud separator urceolus, evaluate the impact of temperature on loss circulation material pressure-bearing plugging effect in stratum, have, the utility model can, according to parameters such as different Fractured leakiness formation conditions settings and Real-Time Monitoring plugging slurry pressure, discharge capacities, conveniently carry out regulation and control to leakage blockage simulation experimentation again.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the front view of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus of the present utility model.
Fig. 2 is the simulation wellbore hole schematic diagram of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus of the present utility model.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As Fig. 1, shown in 2, the utility model provides a kind of Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus, it comprises true three axle leakage blockage simulation systems 1, mud separator 2 and acoustic emission automonitor 3, wherein: true three axle leakage blockage simulation systems 1 have experiment porch 11, on described experiment porch 11, be placed with the natural rock sample 4 of Fractured, the bottom of the natural rock sample 4 of described Fractured and all sidewalls are respectively arranged with very heavy pressure plare 12, described very heavy pressure plare 12 is connected with stabilizing hydraulic pressure source 13, the top of the natural rock sample 4 of described Fractured is provided with end face pressing plate 14, described end face pressing plate 14 is connected with described experiment porch 11, the upper end of the natural rock sample 4 of described Fractured is connected with simulation wellbore hole 5, mud separator 2 has urceolus 21 and is arranged on the piston 22 in described urceolus 21, the lower end of described urceolus 21 is connected with described end face pressing plate 14, the bottom of described urceolus 21 has fluid hole 211, described fluid hole 211 is connected with connecting cylinder 23, and one end that described connecting cylinder 23 passes described end face pressing plate 14 is connected with described simulation wellbore hole 5, acoustic emission automonitor 3 has a plurality of acoustic emission probes 31, and described a plurality of acoustic emission probes 31 are arranged on the relative sidewall of natural rock sample 4 levels of described Fractured.
Specifically, the experiment porch 11 of true three axle leakage blockage simulation systems 1 supports on the ground by a plurality of supporting legs 111, the top of experiment porch 11 is used for placing the natural rock sample 4 of Fractured, and end face pressing plate 14 is positioned at the top of the natural rock sample 4 of Fractured, and its two ends are connected on experiment porch 11 by bolt 141.In the utility model, the natural rock sample 4 of this Fractured picks up from stratum, field and appears, it is the square bodily form, in the present embodiment, the appearance and size of the natural rock sample 4 of this Fractured can be 200mm * 200mm * 200mm, 300mm * 300mm * 300mm or 400mm * 400mm * 400mm, adopt the natural rock sample 4 of Fractured of above-mentioned appearance and size, for simulating leakage feature and the state on the Fractured leakiness stratum under different size condition, record loss circulation material and form the shutoff time of stablizing occluding body, the feature such as distributing position of loss circulation material and density degree in crack is opened after rock sample in observation, loss circulation material plugging effect is carried out to overall merit, the center, upper end of the natural rock sample 4 of this Fractured offers a uncased wellbore 41 downwards.The natural rock sample 4 of Fractured that the utility model adopts, due to the coarse feature that can embody crack in true stratum of crack wall in the natural rock sample 4 of Fractured, and fracture aperture can change along with the variation of the natural rock sample 4 suffered simulated ground stress of Fractured, can the impact of real simulation geostatic stress on Process of Leaking Stoppage.
It is the high-temperature liquid force feed that 200 ℃, maximum pressure are 100MPa that mud separator 2 can bear maximum temperature, and it is comprised of urceolus 21 and piston 22, and the lower end of urceolus 21 is connected on end face pressing plate 14, and piston 22 can axially movably be located in urceolus 21.On the upper end sidewall of urceolus 21, offer inlet opening 212, this inlet opening 212 is connected with a servo-hydraulic pressurization system 6 by a pipeline, this servo-hydraulic pressurization system 6 is for to the interior supply high-temperature liquid of urceolus 21 force feed, piston 22 axially moves down urceolus 21 is interior under the driving of high-temperature liquid force feed, this servo-hydraulic pressurization system 6, by adjusting and control the injection rate of high-temperature liquid force feed, can realize the control and the record that mud in mud separator 2 are injected to simulation wellbore hole 5 discharge capacities; On the diapire of urceolus 21, offer fluid hole 211, fluid hole 211 places are connected with connecting cylinder 23, this connecting cylinder 23 passes the lower end of end face pressing plate 14 from the upper end of end face pressing plate 14, this connecting cylinder 23 passes the lower end of end face pressing plate 14 and upper well section 51 sealing threads of simulation wellbore hole 5 are connected, thereby effectively prevents that the process of mud injection simulation wellbore hole 5 from the situation of seepage occurring.Further, the lower end of connecting cylinder 23 is provided with valve switch 231, and it is for controlling being communicated with of mud separator 2 and simulation wellbore hole 5.
Further, in urceolus 21 lower ends of mud separator 2, be also connected with temperature controller 7, by the plugging slurry in temperature controller 7 heating mud separators 2, thus the pressure-bearing plugging effect of loss circulation material under evaluation hot environment.In addition, the upper end of urceolus 21 is also connected with suspension ring 24, and suspension ring 24 can be realized the movement to mud separator 2.
Stabilizing hydraulic pressure source 13 is connected with a plurality of very heavy pressure plares 12, in the utility model, very heavy pressure plare 12 is five, it is separately positioned on four sides and a bottom surface of the natural rock sample 4 of Fractured of the square bodily form, stabilizing hydraulic pressure source 13 has three stabilizing hydraulic pressure pumps, one of them stabilizing hydraulic pressure pump is connected with the very heavy pressure plare 12 that is arranged on the natural rock sample of Fractured 4 bottoms, two very heavy pressure plares 12 on stabilizing hydraulic pressure pump two side relative with being arranged on natural rock sample 4 left and right horizontal of Fractured are connected, two very heavy pressure plares 12 on another stabilizing hydraulic pressure pump two side relative with being arranged on the natural rock sample 4 front and back levels of Fractured are connected.The stabilizing hydraulic pressure pump in this stabilizing hydraulic pressure source 13 is used for to the interior injection liquid force feed of very heavy pressure plare 12, to promote very heavy pressure plare 12, move and transfer the pressure on the Fractured corresponding side of natural rock sample 4 and bottom surface, thereby realize the natural rock sample 4 of fracture and apply two horizontal directions and vertical direction simulated ground stress of totally three direction in spaces, also, the true three axle simulated ground stress of dummy activity on the natural rock sample 4 of Fractured.
A plurality of acoustic emission probes 31 of acoustic emission automonitor 3 are separately positioned on the relative two side of natural rock sample 4 left and right horizontal of Fractured, in the utility model, acoustic emission probe 31 is eight, natural rock sample 4 left and right horizontal of Fractured are respectively equipped with four acoustic emission probes 31 on relative two side, four acoustic emission probes 31 lay respectively at four drift angle places of natural rock sample 4 sidewalls of Fractured, and it is for gathering the signal this signal that breaks is positioned of breaking of the natural rock sample 4 interior generations of Process of Leaking Stoppage Fractured.
The course of work of this Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus is as follows:
First, the natural rock sample 4 of Fractured is placed on the experiment porch 11 of true three axle leakage blockage simulation systems 1, and with the fixing natural rock sample 4 of Fractured of five very heavy pressure plares 12, end face pressing plate 14, in mud separator 2, add after the plugging slurry preparing, the inlet opening of mud separator 2 212 is connected with simulation wellbore hole 5 with servo-hydraulic pressurization system 6 respectively with fluid hole 211.
Then, start hydraulic pressure source of stable pressure 13, by stabilizing hydraulic pressure source 13 to the interior injection liquid force feed of very heavy pressure plare 12 contacting with natural rock sample 4 lateral surfaces of Fractured, promote the constant pressure that very heavy pressure plare 12 applies three directions in space to side and the bottom surface of the natural rock sample 4 of Fractured and carry out simulates real three axle geostatic stress states, then open the valve switch 231 that mud separator 2 fluid hole 211 places are connected to connecting cylinder 23 lower ends, assurance mud separator 2 is communicated with simulation wellbore hole 5, then set the discharge capacity of servo-hydraulic pressurization system 6, control the discharge capacity of plugging slurry in mud separator 2, hydraulic servo pressurization system 6 is injected 22 migrations of high-temperature liquid force feed driven plunger by the plugging slurry injection simulation wellbore hole 5 of urceolus 21 belows in mud separator 2, continuous injection along with simulation wellbore hole 5 interior plugging slurries, pressure in simulation wellbore hole 5 also increases, loss circulation material in mud constantly enters the crack bridging of the natural rock sample 4 of Fractured under pressure, hang resistance and form occluding body, stop the further leakage of mud, continuous rising along with pressure, when pressure surpasses after the plugging strength of occluding body, occluding body can be destroyed, and can produce the signal that breaks, now, the acoustic emission probe 31 being laid on the relative two side of natural rock sample 4 left and right horizontal of Fractured will gather and navigate to the signal that breaks that this breaks and sends, the pressure-time curve now recording in conjunction with servo-hydraulic pressurization system 6 can form the process of occluding body and the bearing capacity of occluding body by effectively evaluating loss circulation material.
Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus of the present utility model, by the stratum force environment under simulates real condition of triaxial stress, adopt the natural rock sample 4 of Fractured to evaluate the pressure-bearing plugging effect on loss circulation material fracture leakiness stratum under high temperature and high pressure environment, for the leakage mechanism on Fractured leakiness stratum and the research of Fractured leakiness stratum pressure-bearing leak stopping mechanical mechanism are laid a good foundation, in experimentation, utilize acoustic emission probe 31 can monitor the signal that breaks of the natural rock sample of Fractured 4 inside, and the position of the signal that breaks is positioned, the Real-Time Monitoring of realization to loss circulation material pressure-bearing Process of Leaking Stoppage, and then evaluate the plugging effect of different loss circulation materials to leakage channel, in addition, by being connected to the temperature controller 7 of mud separator 2 lower ends, can realize the heating to the plugging slurry in mud separator 2 urceolus 21, evaluate the impact of temperature on loss circulation material pressure-bearing plugging effect in stratum, have, the utility model can, according to parameters such as different Fractured leakiness formation conditions settings and Real-Time Monitoring plugging slurry pressure, discharge capacities, conveniently carry out regulation and control to leakage blockage simulation experimentation again.
The foregoing is only several embodiment of the present utility model, those skilled in the art can carry out various changes or modification and not depart from spirit and scope of the present utility model the utility model embodiment according to the disclosed content of application documents.
Claims (7)
1. a Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus, is characterized in that, described Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus comprises:
True three axle leakage blockage simulation systems, it has experiment porch, on described experiment porch, be placed with the natural rock sample of Fractured, bottom and all sidewalls of the natural rock sample of described Fractured are respectively arranged with very heavy pressure plare, described very heavy pressure plare is connected with stabilizing hydraulic pressure source, the top of the natural rock sample of described Fractured is provided with end face pressing plate, and described end face pressing plate is connected with described experiment porch, and the upper end of the natural rock sample of described Fractured is connected with simulation wellbore hole;
Mud separator, it has urceolus and is arranged on the piston in described urceolus, and the lower end of described urceolus is connected with described end face pressing plate, and the bottom of described urceolus has fluid hole, described fluid hole is connected with connecting cylinder, and one end that described connecting cylinder passes described end face pressing plate is connected with described simulation wellbore hole;
Acoustic emission automonitor, it has a plurality of acoustic emission probes, and described a plurality of acoustic emission probes are arranged on the relative sidewall of the natural rock sample level of described Fractured.
2. Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus as claimed in claim 1, it is characterized in that, the natural rock sample of described Fractured is the square bodily form, its upper end offers a uncased wellbore downwards, described simulation wellbore hole has upper well section and the section of going into the well being connected, described upper well section is connected with described connecting cylinder, described in the section of going into the well be connected with described uncased wellbore.
3. Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus as claimed in claim 1, is characterized in that, the lower end of described connecting cylinder is provided with valve switch.
4. Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus as claimed in claim 1, is characterized in that, on the urceolus upper end sidewall of described mud separator, offer inlet opening, described inlet opening is connected with a servo-hydraulic pressurization system.
5. Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus as claimed in claim 1, is characterized in that, described acoustic emission probe is eight, and the natural rock sample level of described Fractured is respectively equipped with four described acoustic emission probes on relative two side.
6. Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus as claimed in claim 5, is characterized in that, described four acoustic emission probes are separately positioned on four drift angle places of the natural rock sample sidewall of described Fractured.
7. Fractured leakiness stratum leak stopping bearing capacity evaluating apparatus as claimed in claim 1, it is characterized in that, described stabilizing hydraulic pressure source has three stabilizing hydraulic pressure pumps, wherein two described stabilizing hydraulic pressure pumps respectively two described very heavy pressure plares on the two side relative with being arranged on the natural rock sample level of described Fractured be connected, described in another, stabilizing hydraulic pressure pump is connected with the described very heavy pressure plare that is arranged on the natural rock sample of described Fractured bottom.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628506A (en) * | 2015-12-31 | 2016-06-01 | 中国科学院武汉岩土力学研究所 | Rock fracture simulation sample and preparation method thereof, as well as simulation test device and simulation test method |
| CN105675724A (en) * | 2016-01-29 | 2016-06-15 | 中国矿业大学 | Acoustic emission positioning monitoring device and method for hydraulic fracturing fissure field of coal body containing gas |
| CN106053230A (en) * | 2016-07-13 | 2016-10-26 | 山东科技大学 | Rock crack propagation simulation testing device and testing method |
| CN112343568A (en) * | 2019-08-06 | 2021-02-09 | 中国石油化工股份有限公司 | High-temperature and high-pressure resistant geothermal well fracturing simulation test shaft and application |
| CN112360432A (en) * | 2020-11-11 | 2021-02-12 | 中国石油大学(北京) | Gap simulation mechanism, gap simulation experiment instrument and leaking stoppage evaluation experiment device |
| CN113624583A (en) * | 2021-08-02 | 2021-11-09 | 中海石油(中国)有限公司 | Experimental device for loose sandstone sample preparation and fracturing simulation integration |
| CN113622900A (en) * | 2020-04-21 | 2021-11-09 | 中国石油天然气股份有限公司 | Stratum simulator and crack plugging instrument |
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2013
- 2013-11-08 CN CN201320704682.5U patent/CN203570309U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628506A (en) * | 2015-12-31 | 2016-06-01 | 中国科学院武汉岩土力学研究所 | Rock fracture simulation sample and preparation method thereof, as well as simulation test device and simulation test method |
| CN105628506B (en) * | 2015-12-31 | 2019-03-26 | 中国科学院武汉岩土力学研究所 | Rock fracture simulates sample and preparation method, the simulation test device and method |
| CN105675724A (en) * | 2016-01-29 | 2016-06-15 | 中国矿业大学 | Acoustic emission positioning monitoring device and method for hydraulic fracturing fissure field of coal body containing gas |
| CN105675724B (en) * | 2016-01-29 | 2020-01-10 | 中国矿业大学 | Acoustic emission positioning and monitoring device and method for hydraulic fracture field of gas-containing coal body |
| CN106053230A (en) * | 2016-07-13 | 2016-10-26 | 山东科技大学 | Rock crack propagation simulation testing device and testing method |
| CN112343568A (en) * | 2019-08-06 | 2021-02-09 | 中国石油化工股份有限公司 | High-temperature and high-pressure resistant geothermal well fracturing simulation test shaft and application |
| CN113622900A (en) * | 2020-04-21 | 2021-11-09 | 中国石油天然气股份有限公司 | Stratum simulator and crack plugging instrument |
| CN113622900B (en) * | 2020-04-21 | 2023-09-26 | 中国石油天然气股份有限公司 | Stratum simulator and crack plugging instrument |
| CN112360432A (en) * | 2020-11-11 | 2021-02-12 | 中国石油大学(北京) | Gap simulation mechanism, gap simulation experiment instrument and leaking stoppage evaluation experiment device |
| CN113624583A (en) * | 2021-08-02 | 2021-11-09 | 中海石油(中国)有限公司 | Experimental device for loose sandstone sample preparation and fracturing simulation integration |
| CN113624583B (en) * | 2021-08-02 | 2023-10-20 | 中海石油(中国)有限公司 | Experimental device for loose sandstone sample preparation and fracturing simulation integration |
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