CN109374742A - Evaluation system for carbonate formation rock sound mechanical response characteristic - Google Patents
Evaluation system for carbonate formation rock sound mechanical response characteristic Download PDFInfo
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- CN109374742A CN109374742A CN201710674986.4A CN201710674986A CN109374742A CN 109374742 A CN109374742 A CN 109374742A CN 201710674986 A CN201710674986 A CN 201710674986A CN 109374742 A CN109374742 A CN 109374742A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02827—Elastic parameters, strength or force
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Abstract
The invention proposes a kind of evaluation systems for carbonate formation rock sound mechanical response characteristic comprising closed cabin container；Thermal shrinkable sleeve in the inner cavity of cabin container is set；The upper ultrasonic probe and lower ultrasonic probe being separately positioned at the upper and lower opening of thermal shrinkable sleeve, upper ultrasonic probe and lower ultrasonic probe and thermal shrinkable sleeve form the closed accommodation space for being used to place rock core；The supersonic generator connecting with upper ultrasonic probe except cabin container is set；The oscillograph connecting with lower ultrasonic probe except cabin container is set；Be connected to and can add for the rock core in accommodation space the pore pressure device of pore pressure with accommodation space, the system can preferably simulated formation environment, tested with carrying out carbonate formation rock sound mechanical response characteristic.
Description
Technical field
The present invention relates to oil-gas exploration technical fields, and in particular to one kind is used for carbonate formation rock sound mechanical response
The evaluation system of characteristic.
Background technique
Marine Carbonate Rocks petroleum resources account for about the one third of china natural resources total amount, are the important energy strategy groups of country
It is the major fields currently with oil-gas exploration and development in future at part.Strengthen carbonate formation rock mechanics parameters and ground
Accurately seeking for the key Geological Environmental Factors such as stressor layer system (pore pressure, caving pressure, fracture pressure), is safe and efficient
It bores, the important foundation of Well Completion Engineering of Oil Reservoirs technology.Seismic data inverting, interpretation of logging data are to seek crucial Geological Environmental Factors at present
Main means, and the universal response pattern of sound mechanical characteristic is research and establish the premises of these acquiring methods.But carbonate
The ancient complex geologic conditions in rock stratum give carbonate formation rock mechanics parameters, strata pressure system (pore pressure, collapsing
Pressure, fracture pressure) etc. crucial Geological Environmental Factors seek bringing very big difficulty.
Thus, it is desirable to invent a kind of evaluation system to evaluate carbonate formation rock sound mechanical response characteristic, with to visit
Rope carbonate formation rock sound mechanical characteristic provides effective research technique.
Summary of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the invention proposes one kind to be used for
The evaluation system of carbonate formation rock sound mechanical response characteristic.The system can preferably simulated formation environment, to carry out
The test of carbonate formation rock sound mechanical response characteristic.
A kind of evaluation system for carbonate formation rock sound mechanical response characteristic is proposed according to the present invention, is wrapped
It includes:
Closed cabin container,
Thermal shrinkable sleeve in the inner cavity of cabin container is set,
The upper ultrasonic probe and lower ultrasonic probe being separately positioned at the upper and lower opening of thermal shrinkable sleeve, upper ultrasonic probe
The closed accommodation space for being used to place rock core is formed with lower ultrasonic probe and thermal shrinkable sleeve,
The supersonic generator connecting with upper ultrasonic probe except cabin container is set,
The oscillograph connecting with lower ultrasonic probe except cabin container is set,
The pore pressure device of pore pressure is connected to and can added for the rock core in accommodation space with accommodation space.
In one embodiment, pore pressure device includes:
Across the first intake pipeline that can be connected to accommodation space of cabin container and lower ultrasonic probe,
The liquid hole pressure device for being arranged in except cabin container and being selectively connected to the first intake pipeline,
The gas hole pressure device for being arranged in except cabin container and being selectively connected to the first intake pipeline,
Across the first export pipeline that can be connected to accommodation space and the external world of cabin container and upper ultrasonic probe.
In one embodiment, pore pressure sensor is respectively set on the first intake pipeline and the first export pipeline,
And/or flowmeter is set on the first intake pipeline,
And/or fluid peep hole is set on the first intake pipeline and on the first export pipeline.
In one embodiment, connector is respectively set on the first intake pipeline inside and outside cabin container,
And/or connector is respectively set on the second export pipeline inside and outside cabin container.
In one embodiment, upper pressure end cap is set in the top of upper ultrasonic probe, in the top of upper pressure end cap
The driver that axial compressive force can be applied for upper pressure end cap is set, the pressure end cap under the setting of the lower section of lower ultrasonic probe,
Pressure sensor is arranged in the lower section of lower pressure end cap.
In one embodiment, confining pressure device is set except cabin container, and in the lower end of cabin container, setting, which can be connected to, encloses
Second intake pipeline of the inner cavity of depressor and cabin container, cabin container upper end setting can be connected to cabin container inner cavity and
The second extraneous export pipeline.
In one embodiment, heating member is set in the inner cavity of cabin container.
In one embodiment, cabin container includes:
The ontology of tubular,
Upper press cover at the upper opening of ontology is set,
The lower cover of the lower opening of ontology is set, the inside and outside hole of setting connection on lower cover,
The sealed setting blocking piece at hole.
In one embodiment, lifting device is set in the lower end of blocking piece.
In one embodiment, upper ultrasonic probe and lower ultrasonic probe include the big first part of area of section and
The small second part of area of section, two of them first part relative type motor are arranged and the opposite formula setting of two second parts, also,
The ratio of the area of section of the area of section and second part of first part is 1.5-2.5.
Compared with the prior art, the advantages of the present invention are as follows the system is formed by thermal shrinkable sleeve and upper and lower ultrasonic probe
For accommodating the accommodation space of rock core, facilitate the actual working environment on simulation rock stratum.The system can pass through ultrasonic wave
Generator, upper and lower ultrasonic probe and oscillograph complete the sound mechanical response characteristic test of rock core, have the advantages of simple structure and easy realization.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure:
Fig. 1 shows the schematic diagram of rating system according to an embodiment of the invention；
Fig. 2 shows the schematic diagram of cabin container according to an embodiment of the invention；
Fig. 3 shows rock core top view according to an embodiment of the invention；
Fig. 4 shows the main view of rock core unit according to an embodiment of the invention；
In the accompanying drawings, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described.
Fig. 1 shows the evaluation system according to the present invention for carbonate formation rock sound mechanical response characteristic
100.As shown in Figure 1, system 100 includes cabin container 2, thermal shrinkable sleeve 2.23, upper ultrasonic probe 2.5, lower ultrasonic probe
2.6, supersonic generator 12, oscillograph 11 and pore pressure device 14.Wherein, it is closed that cabin container 2, which is configured to its inner cavity,
Container.Thermal shrinkable sleeve 2.23 is arranged in the inner cavity of cabin container 2.Upper ultrasonic probe 2.5 and lower ultrasonic probe 2.6 difference
It is arranged at the upper and lower opening of thermal shrinkable sleeve 2.23, and forms closed accommodation space 2.29 with thermal shrinkable sleeve 2.23, for places
Rock core 3.Pore pressure device 14 is connected to accommodation space 2.29, adds Pore Pressure for the rock core 3 in accommodation space 2.29
Power.
During the test, pore pressure is added to rock core 3 by hole pressure apparatus 14, to simulate carbonate strata ring
Border.Meanwhile emitting the ultrasonic signal of setpoint frequency and intensity by ultrasonic transmitter 12, so that ultrasonic signal is transmitted to
On upper ultrasonic probe 2.5, then ultrasonic signal is transferred to rock core 3 by upper ultrasonic probe 2.5, and ultrasonic signal passes through rock
Lower ultrasonic probe 2.6 is reached after the heart 3, reaches oscillograph 11 via lower 2.6 signal of ultrasonic probe.The meeting of oscillograph 11 will be ultrasonic
Wave is displayed by the case where rock core 3, and the ultrasound information by reading and analyzing oscillograph 11 obtains 3 property of rock core and hole
Influence of the gap pressure to ultrasonic propagation velocity.
In a preferred embodiment, thermal shrinkable sleeve 2.23 is made of temperature-sensitive PVC material.This thermal shrinkable sleeve 2.23 is in temperature
Degree increases after-contraction to guarantee the leakproofness of accommodation space 2.29.
In a specific embodiment, pore pressure device 14 includes the first intake pipeline 2.30, liquid pore pressure
Device 8, gas hole pressure device 6 and the first export pipeline 2.31.Wherein, one end of the first intake pipeline 2.30 holds across cabin
Device 2 and lower ultrasonic probe 2.6 are connected to the lower end of accommodation space 2.29, to provide hole for the rock core in accommodation space 2.29
Gap pressure.Liquid hole pressure device 8 is arranged except cabin container 2, for passing through 2.30 discharge pressure liquid of the first intake pipeline,
With simulated formation liquid pore-pressure conditions.For example, liquid hole pressure device 8 may include liquid pool and the liquid that is connected to liquid pool
Pore pressure pump.Gas hole pressure device 6 is arranged except cabin container 2, for passing through 2.30 delivery pressure of the first intake pipeline
Contracting gas, with simulated formation gas pore-pressure conditions.For example, gas hole pressure device 6 can be arranged in it is extraneous with sky
The gas compression pump of gas connection.It should be noted that according to the different needs of test, liquid hole pressure device 8 and gas orifice gap
6 selectivity of pressure device is connect with the first intake pipeline 2.30, it is, liquid hole pressure device 8 and gas orifice gap pressure device 6 are not
It can be connect simultaneously with the first intake pipeline 2.30.First export pipeline 2.31 passes through cabin container 2 and upper ultrasonic probe 2.5,
And be connected to the upper end of accommodation space 2.29, outwardly to convey liquid or gas.
According to test needs, during the test, pumped by liquid hole pressure device 8 to the first intake pipeline 2.30
Pressure fluid enters the lower end of rock core 3 after pressure fluid passes through the first intake pipeline 2.30, then by the crack on rock core 3 by
The external world is discharged in the first export pipeline 2.31 positioned at the upper end surface of rock core 3.After filling liquid, the first export pipeline is closed
2.31 with extraneous connection (for example, being provided with the valve for being connected to or ending on it), and by liquid hole pressure device 8 plus
The pore pressure of condition needed for carrying, and by supersonic generator 12, upper ultrasonic probe 2.5, lower ultrasonic probe 2.6 and show
The test of 11 completion sound mechanical response characteristic of wave device.Similarly, during the test, when needing to add gas pore pressure, so that
First intake pipeline 2.30 is connected to gas hole pressure device 6, by gas hole pressure device 6 into rock core 3 injection pressure gas
Body.After filling gas in rock core 3, so that the first export pipeline 2.31 ends with extraneous, gas builds the pressure in rock core 3, with mould
Intend the gas hole pressure condition of actual rock core 3 and completion sound mechanical response is tested.
In order to understand the Fluid pressure situation on the first intake pipeline 2.30 and the first export pipeline 2.31, in the first input
Pore pressure sensor 2.17 is respectively set on pipeline 2.30 and the first export pipeline 2.31, with the pressure of perceptually relevant pipeline.
In addition, flowmeter 2.16 is arranged on the first intake pipeline 2.30, for measure through the fluid of the first intake pipeline 2.30
Flow.In 2.31 upper fluid peep hole 27 of the first intake pipeline 2.30 and the first export pipeline, to obtain fluid flow information.Example
Such as, by whether thering is liquid reflux to judge whether the liquid in rock core 3 fills on the first export pipeline 2.31 of observation.
Easy for installation in order to connect, the setting of 2.30 segmented of the first intake pipeline, for example, being at least divided into three sections, cabin is held
One section outside one section in device 2, one section across cabin container 2 and cabin container 2.It is connected between each section using connector 2.19.
It is, connector 2.19 is respectively set on the first intake pipeline 2.30 inside and outside cabin container 2, thus the first of different segmentations
Intake pipeline 2.30 is interconnected to form the first intake pipeline 2.30.Similarly, the second output inside and outside cabin container 2
Also connector 2.19 is respectively set on pipeline 2.31.It, can very aspect ground progress pipeline connection, disassembly or switching by this set
Deng operation, test efficiency is improved.
In one embodiment, upper pressure end cap 2.4 is set in the top of upper ultrasonic probe 2.5.In upper pressure end cap
2.4 top setting can apply the driver 2.36 of axial compressive force for upper pressure end cap 2.4.Under lower ultrasonic probe 2.6
Lower pressure end cap 2.7 is arranged in side.In the lower section of lower pressure end cap 2.7, pressure sensor 2.8 is set.It is thus possible to pass through driving
Device 2.36 applies axial compressive force in upper pressure end cap 2.4, and power passes sequentially through ultrasonic probe 2.5, rock core 3, lower ultrasonic wave and visits
First 2.6 are transmitted in lower pressure end cap 2.7.At this point, the size of 2.8 energy perception of pressure sensor.It, can be with by above-mentioned setting
It is embodied as rock core 3 and adds axial compressive force, thus simulated formation overburden pressure.It is super by sending while loading axis pressure
Acoustic signals etc. operate and obtain influence of the axis pressure to ultrasonic propagation velocity.
Specifically, the hydraulic cylinder 2.27 that driver 2.36 includes axis press pump 10, connect with axis press pump 10, wherein hydraulic cylinder
2.27 piston 2.24 is sealed to be passed through cabin container 2 and contacts with upper pressure end cap 2.4.Axis press pump 10 can be pneumatic
It can be to surge.This setup is simply easily achieved.
In one embodiment, confining pressure device 9 is set except cabin container 2, for supplying confining pressure for rock core 3.For example,
Confining pressure device 9 may include liquid pool and confining pressure pump.Second intake pipeline 2.1 is set in the lower end of cabin container 2, to enclose for being connected to
The inner cavity of depressor 9 and cabin container 2, with the discharge pressure liquid into the inner cavity of cabin container 2.It is arranged in the upper end of cabin container 2
Second export pipeline 2.25, it is for being connected to the inner cavity and the external world of cabin container 2, the liquid in the inner cavity of cabin container 2 is defeated
It sees off.Meanwhile confining pressure sensor 2.11 is set on the second intake pipeline 2.1, for perceiving Fluid pressure.It is defeated second
Enter on pipeline 2.1 and peep hole 27 is respectively set on the second export pipeline 2.25, to obtain fluid flow information.In test process
In, confining pressure fluid is entered by the second intake pipeline 2.1 in the inner cavity of cabin container 2, after the inner cavity of cabin container 2 fills,
Fluid is excluded by the second export pipeline 2.25, can be observed by peep hole 27 and be obtained the information.At this point, the second output of cut-off
Pipeline 2.25 and extraneous connection, and by the pressure of the adjustment fluid of confining pressure device 9, to load the confining pressure of certain condition.Test knot
Shu Hou, confining pressure fluid are discharged by the second intake pipeline 2.1.It can analyze the variation pair of carbonate strata confining pressure by above-mentioned setting
The influence of acoustic speed.
In one embodiment, heating member 2.3 is set in the inner cavity of cabin container 2.The setting of heating member 2.3 is held in cabin
On the inner wall of device 2, for simulating the temperature regime of carbonate formation.Preferably, heating member 2.3 is netted resistance wire, with
It is heated by way of electricity fever.Meanwhile heater 2.3 be it is netted, can guarantee homogeneous heating.It can be with by above-mentioned setting
Obtain influence of the temperature to acoustic speed in carbonate strata.
In one embodiment, cabin container 2 includes ontology 2.2, upper press cover 2.1, lower cover 2.9 and blocking piece 2.14.Its
In, ontology 2.2 is cylindrical in shape.Upper press cover 2.1 is arranged at the upper opening of ontology 2.2, the upper opening for plugging ontology 2.2.Under
The lower opening of ontology 2.2 is arranged in 2.9 plugging type of gland.The setting opening 2.25 on lower cover 2.9.Blocking piece 2.14 is arranged
At opening 2.25, to block opening 2.25.Meanwhile being arranged between the lower cover 2.9 at blocking piece 2.14 and opening 2.25 close
Seal 2.15, to realize the sealing of the inner cavity of cabin container 2.It, can be by the equal components setting of rock core 3 to cabin after removing blocking piece 2.14
In the inner cavity of body container 2.After blocking piece 2.14 is arranged again, the inner cavity of cabin container 2 is closed, with simulated formation situation.This structure
Simply, it is easy to accomplish.
In the lower end of blocking piece 2.14, lifting device 7 is set.Preferably, lifting device 7 is configured to hydraulic jack.It is testing
In the process, blocking piece 2.14 can be arranged at opening 2.25 by lifting device 7.Meanwhile in the axial direction, lifting device 7 rises
To the effect of support all parts (upper ultrasonic probe 2.5, lower ultrasonic probe 2.6 and rock core 3 etc.).
In a preferred embodiment, upper ultrasonic probe 2.5 and lower ultrasonic probe 2.6 include that area of section is big
First part 2.34 and the small second part 2.35 of area of section.It is, second part 2.35 is configured to first part
The bossy body of 2.34 end face.2.34 relative type motor of two of them first part is arranged and two opposite formulas of second part 2.35 are set
It sets.Also, the area of section of the area of section of first part 2.34 and second part 2.35 is 1.5-2.5.Pass through this set
The exact matching of lower 2.7 cross-sectional area of pressure end cap, upper 2.24 cross-sectional area of pressure end cap and 3 cross-sectional area of rock core,
Guarantee that axis pressure passes to upper ultrasonic wave end cap 2.5 by upper pressure end cap 2.24 glibly, then smooth by upper ultrasonic wave end cap 2.5
Ground passes to rock core 3, to guarantee that the longitudinal and shear wave signal of the upper received ultrasonic transmitter 12 of ultrasonic wave end cap 2.5 transmitting leads to comprehensively
Rock core 3 is crossed, and is received comprehensively by lower ultrasonic wave end cap 2.6, improves test accuracy as a result,.
This system 100 further includes instruction case 1, for storing the components such as cabin container 2.Instruction case 1 is configured to square body knot
Structure.As shown in Figure 1, idler wheel 31 is arranged, on the bottom wall of instruction case 1 to be moved easily system 100.In the inside of instruction case 1,
The support plate 32 being laterally extended is set.Instruction case 1 is arranged in by bracket 4 being arranged in support plate 32 in cabin container 2
Internal side.Also, lifting device 7 is arranged on the bottom wall of instruction case 1, and passes through support plate 32, and solid with blocking piece 2.14
Fixed connection.On the other side bottom wall of the inside of instruction case 1 (lower end of support plate 32) close to formula be provided with axis pressure driver 10,
Confining pressure device 9 and liquid hole pressure device 8.The components such as oscillograph 11 and supersonic generator 12 are arranged in support plate 32, and with
Axis presses driver 10 to wait the same side for being located at instruction case 1.Above-mentioned setting optimizes it so that the internal structure of instruction case 1 is compact
Inner space.It should be noted that the outside of instruction case 1 is arranged in gas hole pressure device 6.
During the test, the rock core 3 with flowering structure can be used, as shown in Figure 3.Rock core 3 includes at least two rock cores
Unit 30.Each rock core unit 30 is configured to column, and the bottom surface of each rock core unit 30 is the corresponding bottom surface of rock core 3
A part.It is, rock core 3 to be divided into different rock core units 30 by vertical section.Rock core 3 is by 30 groups of rock core unit
At split type structure.Meanwhile as shown in figure 4, being configured with simulation crack 39 at least one rock core unit 30, which splits
Gap 39 is configured to be connected to two bottom surfaces of rock core unit 30.It, can be on the inside of it since the rock core 3 is split type structure
First setting simulation crack 39, is then assembled into rock core 3 for each rock core unit 30 again on surface.To which this mode to simulate
The processing in crack 39 becomes easy, while the size for being formed by simulation crack 39 is also relatively more accurate.Meanwhile it being tested accordingly
It after the completion, can also be by modifying or increasing the size and number for simulating crack 39 on rock core unit 30, to simulate difference
Rock stratum, save experimentation cost as a result, improve test efficiency.
In a preferred embodiment, rock core 3 includes two rock core units 30 for being configured to semicolumn.The two rock cores
The inner surface of unit 30 is square face, and outer surface is semicircle cambered surface, and bottom surface is semi circular surface.During the test, two rock core lists
The inner surface relative type motor contact of member 30, to form rock core 3.This structure is simple, easily manufactured.Meanwhile in two rock core units
After 30 docking, the simulation crack 39 on each rock core unit 30 is symmetrical.This setup can make structure simple, be easily worked.
Simulation crack 39 includes the crack 33 being arranged on the inner surface of rock core unit 30, with splitting for simulated formation rock core
Seam.Crack 33 is extended with semicircular arc-shaped to the outer surface of rock core unit 30.It is, crack 33 is in semi-cylindrical.It is excellent at one
In the embodiment of choosing, the width (being indicated in Fig. 4 with alphabetical G) in crack 33 is not more than 10 millimeters, for example, straight a bottom surface
Diameter is 38 millimeters, and on a height of 76 millimeters of rock core 3, the width in crack 33 is 6 millimeters, to guarantee the intensity of itself of rock core 3, is prevented
Rock core 3 is destroyed and influences 3 test result of rock core during only testing.In addition, the central point and rock core of 33 length direction of crack
The radial center of unit 30 is overlapped.Also, the outer arc face in crack 33 and the minimum range of the outer surface of rock core unit 30 are
4 to 7 millimeters, such as 5 millimeters.The length direction in crack 33 and the angle of rock core unit 30 being axially formed are 0 to 90 degree, also
It is that the length extending direction in crack 33 can be adjusted according to the fracture strike of the Different Strata of simulation.Certainly, the application
Be not limited in above-mentioned size and structural parameters, and above-mentioned size and structural parameters can it is different according to stratum to be simulated and
It is different.
On rock core unit 30, hemispherical hole 34 can also be set on an internal surface, in the rock of two semi-cylindricals
Heart unit 30 can the glomerate hole of shape after combining.The hole 34 extends to the lateral surface of rock core unit 30.It can be with by the hole 34
The hole of simulated formation rock core.The specific radius size in hole 34 can be configured according to practical different.Preferably, in rock core
On unit 30, multiple holes 34 can be set.In order to facilitate processing, multiple holes 34 can be located at the radial with always of rock core unit 30
On line, meanwhile, hole 34 can also about rock core unit 30 radial center it is symmetrical.This set can reduce adding for rock core unit 30
Work difficulty, meanwhile, so that the distribution in hole 34 is more regular, to facilitate the later period to summarize the size and number of test result and hole 34
Relationship.
In one embodiment, connectivity slot 35 is set on the inner surface of rock core unit 30.The connectivity slot 35 mainly plays company
Logical effect, to flow to another bottom surface after capable of flowing through crack 33 and/or hole 34 from a bottom surface of rock core 3 for realizing fluid.
The sectional dimension of the connectivity slot 35 cannot be greater than 3*3 millimeters.It is, the width and depth of connectivity slot 35 cannot be greater than 3 millis
Rice, for example, the width of connectivity slot 35 and depth are 2 millimeters.The area of passage of the connectivity slot 35 of this set is smaller, to whole
The parameters such as the integrally-built intensity of a rock core 3, porosity influence and little.The application does not limit specifically walking for connectivity slot 35
To as long as being able to achieve the connection between crack 33, and/or between hole 34, and/or between crack 33 and hole 34.
In one embodiment, the holding tank 36 that is connected to connectivity slot 35 is set on the bottom surface of rock core unit 30, with
In reception and storage fluid.For example, during carrying out pore pressure test, the holding tank 36 of setting can store fluid and square
Just it is conveyed into rock core unit 30.Preferably, the width of holding tank 36 is 3 to 5 millimeters, for example, 4 millimeters.Holding tank 36
Depth is 3 to 5 millimeters, for example, 4 millimeters.
In a specific embodiment, the holding tank 36 of arcuation is set on the bottom surface of rock core unit 30.In rock core list
Three cracks 33 are set in member 30.Three cracks 33 are uniformly arranged in the axial direction of rock core unit 30.And between each crack 33
It is parallel to each other.The length direction in each crack 33 is with axial in 60 degree of angles.Hole 34 is provided between two adjacent cracks 33.?
There are three holes 34 for setting between two adjacent cracks 33, and three holes 34 are on radial same straight line.Meanwhile in rock core list
On the inner surface of member 30, a plurality of connectivity slot 35 parallel with axial direction is set, to realize between holding tank 36, crack 33 and hole 34
Connection.
According to the present invention, rock core unit 30 can be made of metal.For example, rock core unit 30 is made of stainless steel.It is this
Stainless hardness of steel height is utilized in setting, itself is uniform in material, the advantages that being easily worked.Meanwhile this set can guarantee test ginseng
This is related to the factors such as size and number in simulation crack 39 for base.Certainly, rock core unit 30 can also using plastics or
The materials such as glass are made.
Rock core 3 using the above structure can with quantitative simulation carbonate petrosal foramen, seam, hole structure size, can also be formed hole,
Seam, the quantita-tive combinations of hole structure and occurrence distribution characteristics, can be to Fluid pressure be filled inside rock core, and rock core skeleton sound mechanics is loud
It answers characteristic clear, there is stronger pressure-bearing and temperature resistant capability, meet the test and mainly test carbonate petrosal foramen, seam, hole structure, temperature
Degree, pore fluid pressure, confining pressure, pressure at right angle variation and acoustic characteristic between response relation requirement.
The system 100 can simulate overburden pressure, horizontal principal stress, formation pore pressure, temperature and fluid state etc.
Bad ground environment can change the influence to acoustic speed with the single factor such as test analysis Pore Pressure on Carbonate Rock Formation,
Effective test arm is provided to explore the scientific research in terms of carbonate rock bad ground sound mechanical characteristic generality response pattern
Section.
The above is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, any this field
Technical staff in technical scope disclosed by the invention, can be easy to carry out and be altered or varied, and this be altered or varied all
It is covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection scope of claims
It is quasi-.
Claims (10)
1. a kind of evaluation system for carbonate formation rock sound mechanical response characteristic characterized by comprising
Closed cabin container,
Thermal shrinkable sleeve in the inner cavity of the cabin container is set,
The upper ultrasonic probe and lower ultrasonic probe being separately positioned at the upper and lower opening of the thermal shrinkable sleeve, the upper ultrasonic wave
Probe and the lower ultrasonic probe and the thermal shrinkable sleeve form the closed accommodation space for being used to place rock core,
The supersonic generator connecting with the upper ultrasonic probe except the cabin container is set,
The oscillograph connecting with the lower ultrasonic probe except the cabin container is set,
The pore pressure dress of pore pressure is connected to and can added for the rock core in the accommodation space with the accommodation space
It sets.
2. system according to claim 1, which is characterized in that the pore pressure device includes:
Across the first intake pipeline that can be connected to the accommodation space of the cabin container and the lower ultrasonic probe,
The liquid hole pressure device for being arranged in except the cabin container and being selectively connected to first intake pipeline,
The gas hole pressure device for being arranged in except the cabin container and being selectively connected to first intake pipeline,
Across the first output that can be connected to the accommodation space and the external world of the cabin container and the upper ultrasonic probe
Pipeline.
3. system according to claim 2, which is characterized in that in first intake pipeline and first export pipeline
On pore pressure sensor is respectively set,
And/or flowmeter is set on first intake pipeline,
And/or fluid peep hole is set on first intake pipeline and on first export pipeline.
4. system according to claim 2 or 3, which is characterized in that first input inside and outside the cabin container
Connector is respectively set on pipeline,
And/or connector is respectively set on second export pipeline inside and outside the cabin container.
5. system according to any one of claims 1 to 4, which is characterized in that in the top of the upper ultrasonic probe
Pressure end cap in setting, in the top of the upper pressure end cap, setting can apply the driving of axial compressive force for the upper pressure end cap
Pressure sensing is arranged in the lower section of the lower pressure end cap in device, the pressure end cap under the setting of the lower section of the lower ultrasonic probe
Device.
6. according to claim 1 to system described in any one of 5, which is characterized in that be arranged except the cabin container and enclose
Depressor, in the lower end of the cabin container, setting can be connected to the second input pipe of the inner cavity of the confining pressure device and the cabin container
Line, in the upper end of the cabin container, setting can be connected to the inner cavity of the cabin container and second export pipeline in the external world.
7. according to claim 1 to system described in any one of 6, which is characterized in that set in the inner cavity of the cabin container
Set heating member.
8. according to claim 1 to system described in any one of 7, which is characterized in that the cabin container includes:
The ontology of tubular,
Upper press cover at the upper opening of the ontology is set,
The lower cover of the lower opening of the ontology is set, the inside and outside hole of setting connection on the lower cover,
The sealed setting blocking piece at the hole.
9. system according to claim 8, which is characterized in that lifting device is arranged in the lower end of the blocking piece.
10. according to claim 1 to system described in any one of 9, which is characterized in that the upper ultrasonic probe and it is described under
Ultrasonic probe includes the big first part of area of section and the small second part of area of section, first described in two of them
It is divided to relative type motor to be arranged and the opposite formulas setting of two second parts, also, the area of section of the first part and described the
The ratio of the area of section of two parts is 1.5-2.5.
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