CN203465174U - Device for simulating dynamic fracture test of stratigraphic rocks - Google Patents
Device for simulating dynamic fracture test of stratigraphic rocks Download PDFInfo
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- CN203465174U CN203465174U CN201320470695.0U CN201320470695U CN203465174U CN 203465174 U CN203465174 U CN 203465174U CN 201320470695 U CN201320470695 U CN 201320470695U CN 203465174 U CN203465174 U CN 203465174U
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- steel cylinder
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Abstract
The utility model relates to a device for simulating a dynamic fracture test of stratigraphic rocks. The device is characterized by comprising a rock sample for the test, a thick wall steel cylinder, an upper piston, a lower piston, an upper cover plate and a lower cover plate, wherein the thick wall steel cylinder is sleeved outside the rock sample for the test, a sealed rubber bag is arranged between the rock sample for the test and the thick wall steel cylinder, and an annulus exists between the thick wall steel cylinder and the sealed rubber bag. The upper and lower cover plates are respectively arranged on the sealed rubber bag up and down, a plurality of leveling bolts are arranged in installation holes corresponding to the upper and lower cover plate and the thick wall steel cylinder in a penetrating manner, and the upper and lower cover plate and the thick wall steel cylinder are integrally fixed through a plurality of nuts. An applying confining pressure hole which is communicated with the annulus between the thick wall steel cylinder and the sealed rubber bag is formed in the thick wall steel cylinder. A dynamic load pressure hole for arranging a dynamic load applying tool is axially formed in a central position between the upper piston and the rock sample for the test. A dynamic load measuring pressure gage for measuring the dynamic load on a central inner wall hole of the rock sample for the test is arranged on the lower cover plate. The device provided by the utility model can be used as a dynamic fracture test device which is widely applied to dynamic fracture test processes of the stratigraphic rocks.
Description
Technical field
The utility model relates to a kind of dynamic failure test unit, particularly about a kind of simulated formation rock dynamic failure test unit.
Background technology
In the exploitation in low-permeability oil gas field, main waterfrac treatment and the Acidizing Technology of adopting transformed oil reservoir at present.But in the very low hydrocarbon-bearing pool of permeability, the major fracture neighborhood oil gas only forming in waterfrac treatment can flow into major fracture output by original micro-pore in rock, away from major fracture still difficult extraction of oil gas far away, effectively improving low-permeability oil gas field recovery ratio is the major issue that the exploitation of low-permeability oil gas field faces.No matter be the conventional measure of LOW PERMEABILITY OILFIELD DEVELOPMENT, still develop the Physical oil recovery measure in low-permeability oil gas field, having a very crucial problem is exactly the destruction case study of rock in dynamic load situation, is also a core key issue of carrying out pressing crack construction.The Physical oil recovery mechanism of action be exactly Dynamic Loading on oil reservoir, improve reservoir permeability, thereby improve increasing yield and injection effect.The destruction case study of rock in dynamic load situation is of great significance for LOW PERMEABILITY OILFIELD DEVELOPMENT.Yet how to rock, the destruction situation in dynamic load situation is evaluated, and sets up a set of applicable simulation test device and evaluation means by most important.
Through the literature search of prior art is found, for measuring Dynamic properties of rock, mostly adopt SPHB(Split Hopkinson Pressure Bar both at home and abroad at present, split hopkinson bar) device, this device mostly is uniaxial compression state, although a few countries has adopted three axle SHPB devices, confined pressure and impact velocity are also very low.Along with mining, petroleum industry mining depth progressively deepens, the mechanical characteristics of prediction deep perforation, demolition effect and the dynamic stress field surrounding rock body that produces therefrom just becomes problem demanding prompt solution.This device is used more in Geotechnical Engineering, but in petroleum engineering, and due to the restriction of rock size and the shortcoming such as the true stressing conditions simulated conditions of subterranean strata are limited, this device can not meet the experimental study requirement of the dynamic stratum rock failure mechanism of rock completely.
Summary of the invention
For the problems referred to above, the purpose of this utility model be to provide a kind of can simulated formation rock constant while enclosing to pressure and axle pressure dynamic loading destroy the simulated formation rock dynamic failure test unit of situation.
For achieving the above object, the utility model is taked following technical scheme: a kind of simulated formation rock dynamic failure test unit, is characterized in that: it comprises rock sample, heavy wall steel cylinder, upper piston, lower piston, upper cover plate and lower cover for test; At the sheathed described heavy wall steel cylinder in rock sample outside for described test, between described test is with rock sample and described heavy wall steel cylinder, be provided with a seal capsule, and have an annular space between described heavy wall steel cylinder and described seal capsule; On described seal capsule, place described upper cover plate, at described seal capsule lower surface, place described lower cover, some leveling bolts are located in the corresponding mounting hole arranging of described upper cover plate, described lower cover and described heavy wall steel cylinder, and by a plurality of nuts, described upper cover plate, described lower cover and described heavy wall steel cylinder are fixed into one; On described heavy wall steel cylinder, be provided be communicated with annular space between described heavy wall steel cylinder and seal capsule apply confined pressure hole; In described upper piston and test, with the center of rock sample, be axially provided with one and for placing dynamic loading, apply the dynamic loading pressure port of instrument; Described lower cover place arranges one for measuring the dynamic loading gaging pressure meter of the center inner wall hole dynamic loading value of rock sample for described test.
Described test is with between rock sample top and described upper piston, a sealing gasket being set, and described test is with between rock sample bottom and described lower piston, another sealing gasket being set.
Described upper piston and described lower piston are circumferentially provided with some O RunddichtringOs.
The described confined pressure hole that applies comprises the oil hole axially arranging along described heavy wall steel cylinder, and the injecting hole radially arranging along described heavy wall steel cylinder.
The described confined pressure hole that applies is one, or is two that are arranged symmetrically with.
Described dynamic loading applies tool interior gunpowder is housed.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, the utility model is owing to connecting a gas cylinder applying one end, confined pressure hole, therefore can apply as required certain gaseous tension, by the hydraulic oil between seal capsule and heavy wall steel cylinder, pressure is passed to test rock sample, and then realization applies constant enclosing to pressure to test with rock sample.2, the utility model can be used the bolt at heavy wall steel cylinder upper cover plate place, rock sample place by Scale wrench adjusting test, applies test rock sample constant axial.3, the dynamic load effect that the utility model can discharge by the dynamic loading compression tools applying on dynamic loading pressure port is at test rock sample inner wall hole, and the dynamic loading gaging pressure meter of laying by lower cover place, constant enclose to pressure and axle pressure, determine after, measure dynamic loading situation, thereby rock dynamic loading destruction situation is assessed.4, the utility model can also remove rock sample seal capsule around for test, by gas cylinder, from applying confined pressure hole, exert pressure, adopt gaseous tension with rock sample outside, to center pit, to carry out seepage flow to test, measuring center hole pressure changing, the permeability value of rock sample for anti-push out test.Realizing this device does not need change can measure the situation of change of the permeability of rock sample before and after dynamic loading applies, and further by permeability variation situation, evaluates the situation that rock sample destroys under dynamic loading.The utility model can be used as dynamic failure test unit and is widely used in simulated formation rock dynamic failure process of the test.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation
Fig. 2 is the utility model inner structure schematic diagram
Fig. 3 is the utility model rock sample equipment schematic diagram
Fig. 4 is that the utility model applies confined pressure structural representation
Fig. 5 is the utility model upper cover plate structural representation
Fig. 6 is the utility model lower cover structural representation
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1 and Figure 2, the utility model comprises rock sample 1, heavy wall steel cylinder 2, upper piston 3, lower piston 4, upper cover plate 5 and lower cover 6 for test.
As shown in Figure 3, test is with being provided with a sealing gasket 7 between the top of rock sample 1 and upper piston 3, tests with being provided with another sealing gasket 8 between the bottom of rock sample 1 and lower piston 4.Upper piston 3 and lower piston 4 be circumferentially provided with some O RunddichtringOs 9.
As shown in Figure 2, with rock sample 1 inside, there is axial round center hole (not shown) in test, at the rock sample 1 sheathed heavy wall steel cylinder 2 in outside for test, between test is with rock sample 1 and heavy wall steel cylinder 2, be provided with a seal capsule 10, and have an annular space between heavy wall steel cylinder 2 and seal capsule 10.On seal capsule 10 tops, be provided with upper sealing ring 11, in seal capsule 10 bottoms, be provided with lower sealing ring 12.On upper sealing ring 11, place upper cover plate 5, on lower sealing ring 12, place lower cover 6, some leveling bolts 13 are located in upper cover plate 5, lower cover 6 and the corresponding mounting hole arranging of heavy wall steel cylinder 2, and by a plurality of nuts, upper and lower cover plate 5,6 and heavy wall steel cylinder 2 are fixed into one.On heavy wall steel cylinder 2, be provided be communicated with annular space between heavy wall steel cylinder 2 and seal capsule 10 apply confined pressure hole 15, apply confined pressure hole 15 and comprise the oil hole axially arranging along heavy wall steel cylinder 2, and the injecting hole radially arranging along heavy wall steel cylinder 2, on oil hole and injecting hole, be equipped with piston.During use, first the piston of oil hole is opened, after filling with hydraulic oil in the annular space between heavy wall steel cylinder 2 and seal capsule 10, closed plug; Then the piston of injecting hole is opened, and be communicated with gas cylinder to applying the interior injection air in confined pressure hole 15, so that hydraulic oil is exerted pressure, and transfer the pressure to rock sample 1 for test by seal capsule 10, thereby test is produced to certain enclosing to pressure with rock sample 1.Further adjust gas cylinder and apply pressure to steady state value, thereby realize constant confining pressure.Use Scale wrench to apply as required constant-torque to the bolt 14 on upper cover plate 5, realize test is applied to constant axle pressure with rock sample 1.
In a preferred embodiment, apply confined pressure hole 15 and also can be two, and two apply confined pressure hole 15 for being arranged symmetrically with.
Meanwhile, at upper piston 3 and test, with the center of rock sample 1, be axially provided with a dynamic loading pressure port 16.After constant axial and constant circumferential pressure are determined, at dynamic loading pressure port 16 places, place dynamic loading and apply instrument, this tool interior is equipped with gunpowder, by controlling powder volume, and igniter head electric ignition is detonated and is made it detonation, discharge controlled dynamic loading, this dynamic loading finally acts on rock sample 1 inner hole wall for test, and place a dynamic loading gaging pressure meter (not shown) by lower cover 6 places, measure the center inner wall hole dynamic loading value of rock sample 1 for test, and be transferred to computing machine and process.According to repeatedly converting gunpowder consumption, record many group dynamic loading data, can carry out rock dynamic loading destruction situation to assess.If remove seal capsule 10, use gas cylinder to apply gaseous tension by applying confined pressure hole 15, from test, with rock sample 1 outside, to center pit, carry out gas flow, in lower cover 6 bottoms, place dynamic loading gaging pressure meter, measuring center hole pressure changing, the permeability value of rock sample 1 for anti-push out test.So can realize this device does not need change can measure the situation of change of the permeability of rock sample before and after dynamic loading applies, and further by permeability variation situation, evaluates the situation that rock sample destroys under dynamic loading.
The various embodiments described above are only for illustrating the utility model; wherein the structure of each parts, connected mode etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement, all should not get rid of outside protection domain of the present utility model.
Claims (6)
1. a simulated formation rock dynamic failure test unit, is characterized in that: it comprises rock sample, heavy wall steel cylinder, upper piston, lower piston, upper cover plate and lower cover for test;
At the sheathed described heavy wall steel cylinder in rock sample outside for described test, between described test is with rock sample and described heavy wall steel cylinder, be provided with a seal capsule, and have an annular space between described heavy wall steel cylinder and described seal capsule; On described seal capsule, place described upper cover plate, at described seal capsule lower surface, place described lower cover, some leveling bolts are located in the corresponding mounting hole arranging of described upper cover plate, described lower cover and described heavy wall steel cylinder, and by a plurality of nuts, described upper cover plate, described lower cover and described heavy wall steel cylinder are fixed into one; On described heavy wall steel cylinder, be provided be communicated with annular space between described heavy wall steel cylinder and seal capsule apply confined pressure hole; In described upper piston and test, with the center of rock sample, be axially provided with one and for placing dynamic loading, apply the dynamic loading pressure port of instrument; Described lower cover place arranges one for measuring the dynamic loading gaging pressure meter of the center inner wall hole dynamic loading value of rock sample for described test.
2. simulated formation rock dynamic failure test unit according to claim 1, is characterized in that: described test is with between rock sample top and described upper piston, a sealing gasket being set, and described test is with between rock sample bottom and described lower piston, another sealing gasket being set.
3. simulated formation rock dynamic failure test unit according to claim 1, is characterized in that: described upper piston and described lower piston are circumferentially provided with some O RunddichtringOs.
4. according to the simulated formation rock dynamic failure test unit described in claim 1 or 2 or 3, it is characterized in that: described in apply confined pressure hole and comprise the oil hole axially arranging along described heavy wall steel cylinder, and the injecting hole radially arranging along described heavy wall steel cylinder.
5. simulated formation rock dynamic failure test unit according to claim 4, is characterized in that: described in to apply confined pressure hole be one, or be two of being arranged symmetrically with.
6. according to the simulated formation rock dynamic failure test unit described in claim 1 or 2 or 3 or 5, it is characterized in that: described dynamic loading applies tool interior gunpowder is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320470695.0U CN203465174U (en) | 2013-08-02 | 2013-08-02 | Device for simulating dynamic fracture test of stratigraphic rocks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320470695.0U CN203465174U (en) | 2013-08-02 | 2013-08-02 | Device for simulating dynamic fracture test of stratigraphic rocks |
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| CN203465174U true CN203465174U (en) | 2014-03-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411870A (en) * | 2013-08-02 | 2013-11-27 | 中国海洋石油总公司 | Experimental device for simulating dynamic destruction of stratum rocks |
| CN105424445A (en) * | 2016-01-13 | 2016-03-23 | 大连理工大学 | Rock blasting crack extraction test tank |
| CN107101875A (en) * | 2017-06-15 | 2017-08-29 | 北京科技大学 | The universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss |
| CN113720668A (en) * | 2021-09-22 | 2021-11-30 | 安徽理工大学 | Device for manufacturing frozen soil dynamic fracture toughness sample |
| US11761864B2 (en) | 2021-12-17 | 2023-09-19 | Saudi Arabian Oil Company | Thick-wall cylinder experiment setup for wellbore stability analysis |
-
2013
- 2013-08-02 CN CN201320470695.0U patent/CN203465174U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411870A (en) * | 2013-08-02 | 2013-11-27 | 中国海洋石油总公司 | Experimental device for simulating dynamic destruction of stratum rocks |
| CN103411870B (en) * | 2013-08-02 | 2015-10-28 | 中国海洋石油总公司 | A kind of simulated formation rock dynamic failure test unit |
| CN105424445A (en) * | 2016-01-13 | 2016-03-23 | 大连理工大学 | Rock blasting crack extraction test tank |
| CN107101875A (en) * | 2017-06-15 | 2017-08-29 | 北京科技大学 | The universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss |
| CN113720668A (en) * | 2021-09-22 | 2021-11-30 | 安徽理工大学 | Device for manufacturing frozen soil dynamic fracture toughness sample |
| CN113720668B (en) * | 2021-09-22 | 2024-02-13 | 安徽理工大学 | Device for manufacturing frozen soil dynamic fracture toughness sample |
| US11761864B2 (en) | 2021-12-17 | 2023-09-19 | Saudi Arabian Oil Company | Thick-wall cylinder experiment setup for wellbore stability analysis |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
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Granted publication date: 20140305 |
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