CN106840544B - A kind of shale rock sample sealing propertytest and coring gas collection simulation experiment method - Google Patents
A kind of shale rock sample sealing propertytest and coring gas collection simulation experiment method Download PDFInfo
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- CN106840544B CN106840544B CN201710056549.6A CN201710056549A CN106840544B CN 106840544 B CN106840544 B CN 106840544B CN 201710056549 A CN201710056549 A CN 201710056549A CN 106840544 B CN106840544 B CN 106840544B
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- 239000011435 rock Substances 0.000 title claims abstract description 215
- 238000000034 method Methods 0.000 title claims abstract description 61
- 238000007789 sealing Methods 0.000 title claims abstract description 49
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 99
- 238000005553 drilling Methods 0.000 claims abstract description 38
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 7
- 210000000481 breast Anatomy 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 44
- 230000004308 accommodation Effects 0.000 claims description 37
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 4
- 102000016938 Catalase Human genes 0.000 abstract description 3
- 108010053835 Catalase Proteins 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 93
- 239000003245 coal Substances 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
Abstract
A kind of shale rock sample sealing propertytest and coring gas collection simulation experiment method, comprising the following steps: prepare rock column, rock is sealed processing to rock column, is transported in laboratory；Rock column is placed into rock sample internal fissure detection device and carries out Crack Detection；Rock column after Crack Detection is qualified, which is placed into rock coring gas collecting apparatus, carries out coring gas collection.The present invention takes non-contact detecting to rock sample sealing propertytest, can keep the integrality of rock sample, can the efficiency of significant subsequent coring gas collection experiment and the accuracy of experimental result.The present invention is in the case where assert that the position gas in fine and close shale gas-bearing formation bosom does not escape, processing is sealed to such rock core, again under the physical condition for simulating underground in laboratory, rock core is crept into again, measure the tolerance lost in drilling process due to catalase, it more accurately solves the problems, such as shale gas-bearing formation gas-bearing property, is more conducive to the evaluation of shale gas-bearing formation.
Description
Technical field
The invention belongs to shale gas-bearing properties to survey gas technical field more particularly to a kind of shale rock sample sealing propertytest and coring
Gas collection simulation experiment method.
Background technique
In production process of natural gas, especially in the production process of shale gas, mud shale gas-bearing property is for evaluating shale
Gas resource potential and Favorable Areas are preferentially vital direct parameters, but the sampling and testing technology of shale air content is not at present
It is enough complete.The method of existing evaluation shale air content is using sorption and desorption isotherm experimental provision, and the method is by drilling well
The coal core returned up in journey carries out sorption and desorption isotherm, assesses the gassiness of shale gas reservoir by desorbing resulting methane content
Amount.If if the tolerance that subsurface rock loses in shattering process is more, the tolerance that shale gas site desorption obtains will be de-
From reality.The method is effective, but right to a certain extent in for example middle high-rank coals coal seam in the low coal seam of free gas comparision contents
For shale, although its whole air content is lower than middle high-order coal, since its free gas air content is generally higher, bored in drill bit
It is relatively high into the tolerance for being crushed institute's loss by shale in the process, it, should for gas-bearing property natively poor mud shale
The Accurate Determining of part loss tolerance is particularly important.In view of the situation, if the tolerance lost in drilling process is measured,
In conjunction with sorption and desorption isotherm method, the gas-bearing property of shale reservoir more will be accurately evaluated.It can currently, there has been no similar
Measure the device of gas windage caused by being crushed in drilling process due to shale.Due to the agensis of mud shale crack but greatly
Hole development, the tightness of shale itself is preferable, and in drilling process, the gas of part that only rock mass is destroyed scatters and disappears, and
Its internal gas is substantially intact, drills through process losses tolerance simulation experiment method for core and provides the foundation condition.
Summary of the invention
The present invention provides a kind of shale rock sample sealing propertytest and coring collection to solve shortcoming in the prior art
Gas simulation experiment method is that shale rock sample is sealed processing in drilling process, first carries out Crack Detection and assert fine and close page
In the case that the position gas in rock gas-bearing formation bosom does not escape, then in laboratory simulate underground physical condition under, to rock
The heart is crept into again, measures the tolerance lost in drilling process due to catalase.
In order to solve the above technical problems, the present invention adopts the following technical scheme: a kind of shale rock sample sealing propertytest and taking
Core gas collection simulation experiment method, comprising the following steps:
One, rock column first is prepared in actual well drilled place, rock column uses the position in fine and close shale gas-bearing formation bosom, in gas
In the case that body does not escape, processing is sealed to rock column, is transported in laboratory；
Two, rock column is placed into rock sample internal fissure detection device and carries out Crack Detection；
Three, the rock column after Crack Detection is qualified, which is placed into rock coring gas collecting apparatus, carries out coring gas collection.
Rock sample internal fissure detection device in step 2 includes cabinet body, and rock sample accommodation chamber, gas inspection are provided in cabinet body
Cabin, electric four-way valve, vacuum pump and air blower are surveyed, rock sample accommodation chamber is columnar structured in front end opening, before rock sample accommodation chamber
End is fixedly connected on the front inner wall of cabinet body by screw, and the setting of gas detection cabin is accommodated in the intracorporal bottom of cabinet and with rock sample
Cabin is connected by sealed fitting, methane detection instrument and air pressure detector is equipped in gas detection cabin, gas detection cabin passes through
Intake and exhaust pipeline is connected with first interface of electric four-way valve, and second interface of electric four-way valve is by gas exhaust piping and very
Sky pump is connected, and the third interface of electric four-way valve is connected by air inlet pipeline with air blower, the 4th interface of electric four-way valve
Connect sky；
Outer surface is equipped with operation panel on front side of cabinet body, and operation panel is equipped with start button and scram button, in cabinet body
Bottom is equipped with control cabinet, and operation panel is connected by data/address bus with control cabinet, methane detection instrument pass through No.1 data line and
Control cabinet is connected, and air pressure detector is connected by two number lines with control cabinet, and electric four-way valve passes through three number lines and control
Cabinet processed is connected, and outer on control cabinet to extend equipment control line, equipment control line is connected with vacuum pump and air blower respectively；
Cabinet body installed in front has hatch door corresponding with rock sample accommodation chamber, the rotation equipped with the cooperation of cabinet body leading flank on hatch door
Lock；When rotation lock is locked, hatch door seals rock sample accommodation chamber, when rotation lock is opened, opens hatch door, rock sample is put into or is taken out rock
Sample accommodation chamber；Attaching plug and total power button is arranged in cabinet body right hand external, and bottom of cabinet bulk is equipped with four universal wheels, and cabinet body is left
Upper lateral part and right upper portion are mounted on a handle, and regulated power supply is equipped in cabinet body, and regulated power supply passes through output power line
It is connect with control cabinet, regulated power supply is connect by input power cord with attaching plug；Grid air hole is provided on the left of cabinet body.
Rock coring gas collecting apparatus in step 3 includes column, and being horizontally disposed on column has testing stand, solid on testing stand
Surely it is equipped with the test cylinder of cylindrical structure, the center line of test cylinder is arranged in vertical, is fixed on test cylinder inner wall
Rock column location structure and the rock column axial positioning structure above rock column circumferential positioning structure, test cylinder upper end outside
Edge is horizontally disposed mounting disc, and mounting disc upper surface is removably connected with the sealing for sealing test cylinder by fastening bolt
Lid, the first sealing ring between sealing cover lower surface and mounting disc upper surface, sealing cover be equipped with lower end with connect inside test cylinder
Logical water injection pipe, blow-down pipe and gauge line；Testing stand lower surface be connected with the drainpipe that is connected to inside test cylinder, on drainpipe
Equipped with drain valve；
Mounting disc lower surface is fixed with two about the symmetrical lifting motor in test cylinder center, each lifting motor
Main shaft vertically upward pass through mounting disc and it is coaxial be sequentially connected with a lead screw, be threaded with one on every lead screw
Sleeve, by one piece of mounting plate connection between two sleeves, the middle part upper surface of mounting plate is fixed with a coring motor, takes
The main shaft of core motor pass through vertically downward mounting plate and it is coaxial be sequentially connected with drilling pipe, the setting of drilling pipe lower circumferential edge is with teeth
The diamond drilling sword of shape, drilling pipe pass through sealing cover from top to bottom and extend into test cylinder, be provided on sealing cover with outside drilling pipe
Second sealing ring of wall sealing cooperation；Mounting disc upper surface be vertically fixed with two it is symmetrical about test cylinder center line
Guide rod, be connected with the guide plate for respectively corresponding and being slidably located on a guide rod on mounting plate；
Mounting disc upper surface is vertically equipped at least four struts along test cylinder center line circular array arrangement, all struts
Upper end is connected with the water tank that an entirety is in circular ring shape, and lead screw and guide rod are respectively positioned on the inside of water tank, and the water inlet of water injection pipe connects
It connects and is provided with water injection valve on the bottom of water tank, water injection pipe；
Vacuum pump is provided on water tank, mounting disc is equipped with expansion box, be connected with pressure gauge on expansion box, gauge line it is upper
End is connect with expansion box, and metering ball valve is provided on gauge line, emptying ball valve is provided on blow-down pipe；
It is provided on testing stand for controlling lifting motor, coring motor and vacuum pump opening and closing and the control of revolving speed dress
It sets.
Rock column location structure is provided with two layers, and every layer of rock column location structure includes four and radially sets along test cylinder
The locating rod set, four locating rods arrange that the outer end of every locating rod is fixed along the centerline direction circumference array of test cylinder
It is located on test cylinder inner wall, every locating rod inner end is fixed with one piece of arc panel, the center line of four pieces of arc panels and test
The center line of cylinder is overlapped；
Rock column axial positioning structure includes that positioning ring flat-plate and three pieces of fixed plates, the outer circumferential walls for positioning ring flat-plate are fixed with
Three pieces of connecting plates, three pieces of fixed plates along test cylinder center line circular array arrangement, fixed plate fixation are located on test cylinder inner wall,
It respectively corresponds on three pieces of connecting plates and is connect with one piece of fixed plate by positioning bolt.
Step 2 specifically includes following procedure:
1) starting of rock sample internal fissure detection device；
2) calibration of rock sample accommodation chamber and gas detection cabin；
3) rock sample internal fissure test experience；
4) instrument after rock sample internal fissure test experience arranges.
Step 1) specifically includes following procedure:
A, automatic rock sample internal fissure detection device is pushed away and is placed on smooth ground；
B, by the attaching plug of civilian 220V plant-grid connection rock sample internal fissure detection device；
C, the total power button by attaching plug is pressed, each component is powered in rock sample internal fissure detection device.
Step 2 specifically includes following procedure:
A, the start button on pushing operation panel, the booting of rock sample internal fissure detection device；
B, hatch door is opened, " gas cleaning " order is assigned on operation panel, electric four-way valve is automatically regulated to be company at this time
Logical air blower and gas detection cabin, then start air blower one minute, are that rock sample accommodation chamber and gas detection cabin are divulged information, eliminate it
In interference gas that may be present；
C, after " gas cleaning " EP (end of program), " gas calibration " order is assigned on operation panel, at this time electric four-way valve
It is automatically regulated to be the 4th interface and the gas detection cabin of connection electric four-way valve, methane detection instrument and air pressure detector reading are returned
Zero.
Step 3) specifically includes following procedure:
I, after " gas calibration " EP (end of program), hatch door is opened, the rock sample prepared is placed in rock sample accommodation chamber, closes hatch door
And lock rotation lock；
II, " rock sample detection " order is assigned on operation panel, electric four-way valve is automatically regulated to be connection vacuum pump at this time
With gas detection cabin, subsequent vacuum pump startup starts to depressurize for rock sample accommodation chamber and gas detection cabin, and methane is visited in decompression process
Instrument and air pressure detector real time readouts are surveyed, marked gas detects the methane content and atmospheric pressure value in cabin, sets when methane concentration reaches
When fixed threshold value, information is fed back on operation panel, shows that current rock sample internal interstices development is intact, when atmospheric pressure value reaches setting
Threshold value when, vacuum pump stops working, and prevents in cabin that air pressure is too low to cause equipment damage；
III, " pressing again in cabin " order after " rock sample detection " EP (end of program), is assigned on operation panel, at this time electric four-way valve
The 4th interface being slowly connected to and gas detection cabin are that gas detection cabin and rock sample accommodation chamber restore air pressure.
Step 4) specifically includes following procedure:
1., after " in cabin again press " order, open hatch door, rock sample taken out；
2., assign on operation panel " gas cleaning " order, electric four-way valve is automatically regulated to be connection air blower at this time
With gas detection cabin, start air blower one minute later, is that rock sample accommodation chamber and gas detection cabin are divulged information, eliminates present in it
Methane gas；
3., press total power button by attaching plug, power off, will be split inside rock sample for rock sample internal fissure detection device
Seam detection device, which is shifted onto, puts in order position.
Step 3 specifically includes following procedure:
(1) the rock column of Crack Detection qualification is put into test cylinder, the outer diameter of the rock column of acquisition is equal to or slightly less than
The internal diameter of arc panel, the intrados of totally 8 pieces of arc panels is bonded with rock column extrados to rock column progress radial limit upper layer and lower layer
Position, is then placed into rock column upper end for positioning ring flat-plate, is connected and fixed plate and connecting plate using positioning bolt, positions ring flat-plate and rock
Stone column press fit plays axial limiting to rock column；
(2) emptying ball valve and water injection valve are opened, drain valve and metering ball valve are closed, the water in water tank is under difference in height effect
Through water injection pipe be flowed into test cylinder in, with the raising of the water surface in test cylinder, air is discharged by blow-down pipe, the first sealing ring and
Second sealing ring plays the role of avoiding gas leakage and leak, after drained air is full of water in test cylinder, closes emptying ball valve
And water injection valve；
(3) it keeps metering ball valve to be in off state, opens vacuum pump, vacuumize process is carried out to expansion box, passes through gas storage
The pressure gauge of box top connection carries out expansion box internal pressure and shows, metering ball valve is opened after the completion of expansion box vacuumizes；
(4) start coring motor and two lifting motors, the revolving speed of two lifting motors is identical, and lifting motor drives lead screw
Rotation limits sleeve and rotates with lead screw since guide plate is set on guide rod, and with the rotation of lead screw, sleeve is transported downwards along lead screw
Dynamic, the mounting plate between two sleeves drives coring motor to realize feed motion axially downwards, and coring motor drives drilling pipe rotation,
The diamond drilling sword cutting rock column of drilling pipe lower end carries out coring；
(5) for drilling pipe during circumgyration incision rock column, the water in test cylinder plays lubrication cooling to hard rock drilling sword
Effect, while rock column internal fracture rock can discharge gas, discharged gas is since differential pressure action enters in expansion box and leads to
Excess pressure table shows gas pressure change in expansion box, to realize that the gas discharged in location of the coring procedure to rock column carries out
It collects and shows；
(6) volume of acquisition gas is obtained by the conversion pressure that the intrinsic volume of expansion box and pressure gauge are shown；
(7) drain valve is opened, the water in test cylinder is discharged by drainpipe, then will be cut isolated core and is taken out.
By adopting the above technical scheme, the rock sample internal fissure detection device in the present invention can detect rock sample and take non-connect
Touching detection, can keep the integrality of rock sample, eliminate the cutting housekeeping in conventional method to rock sample, and complete machine structure
Compact, mobility is good, and high degree of automation, experiment flow is simple, and the detection that can be completed in a short time rock sample leakproofness is real
It tests, it can the efficiency of significant subsequent coring gas collection experiment and the accuracy of experimental result.
The present invention can simulate and acquire the tolerance that core is discharged in shale gas production process, and the present invention is real by simulation
Existing location of the coring procedure, while acquiring the tolerance for measuring that core is discharged when being crushed core in location of the coring procedure.The present invention is to assert
In the case that the position gas in fine and close shale gas-bearing formation bosom does not escape, processing is sealed to such rock core, then with experiment
Under the physical condition for simulating underground in room, rock core is crept into again, measures in drilling process and is lost due to catalase
Tolerance.The combination of the present invention and traditional air content appraisal procedure more will accurately solve asking for shale gas-bearing formation gas-bearing property
Topic, is more conducive to the evaluation of shale gas-bearing formation.
Detailed description of the invention
Fig. 1 is schematic perspective view of the rock sample internal fissure detection device external form under a visual angle in the present invention；
Fig. 2 is schematic perspective view of the rock sample internal fissure detection device external form under another visual angle in the present invention；
Fig. 3 is the schematic diagram of internal structure of rock sample internal fissure detection device in the present invention；
Fig. 4 is the structural schematic diagram that rock sample internal fissure detection device removes after cabinet body and rock sample accommodation chamber in the present invention；
Fig. 5 is the schematic perspective view of rock coring gas collecting apparatus external form in the present invention；
Fig. 6 is the schematic diagram of internal structure of rock coring gas collecting apparatus in the present invention；
Fig. 7 is the schematic perspective view of drilling pipe in Fig. 6.
Specific embodiment
As shown in Fig. 1-Fig. 7, of the invention a kind of shale rock sample sealing propertytest and coring gas collection simulation experiment method, packet
Include following steps:
One, rock column 38 first being prepared in actual well drilled place, rock column 38 uses the position in fine and close shale gas-bearing formation bosom,
In the case where gas does not escape, processing is sealed to rock column 38, is transported in laboratory；
Two, rock column 38 is placed into rock sample internal fissure detection device and carries out Crack Detection；
Three, the rock column 38 after Crack Detection is qualified, which is placed into rock coring gas collecting apparatus, carries out coring gas collection.
Rock sample internal fissure detection device in step 2 includes cabinet body 40, be provided in cabinet body 40 rock sample accommodation chamber 41,
Gas detection cabin 42, electric four-way valve 45, vacuum pump 46 and air blower 47, the cylinder-shaped knot open in front end of rock sample accommodation chamber 41
Structure, 41 front end of rock sample accommodation chamber are fixedly connected on the front inner wall of cabinet body 40 by screw, and gas detection cabin 42 is arranged in cabinet
Bottom in body 40 is simultaneously connected with rock sample accommodation chamber 41 by sealed fitting 48, is equipped with methane detection in gas detection cabin 42
Instrument 43 and air pressure detector 44, gas detection cabin 42 pass through first interface phase of intake and exhaust pipeline 49 and electric four-way valve 45
Even, second interface of electric four-way valve 45 is connected by gas exhaust piping 50 with vacuum pump 46, the third of electric four-way valve 45
Interface is connected by air inlet pipeline 51 with air blower 47, and the 4th interface of electric four-way valve 45 connects sky；
40 front side outer surface of cabinet body is equipped with operation panel 54, and operation panel 54 is equipped with start button 62 and scram button
63, bottom is equipped with control cabinet 56 in cabinet body 40, and operation panel 54 is connected by data/address bus 55 with control cabinet 56, methane detection
Instrument 43 is connected by No.1 data line 57 with control cabinet 56, and air pressure detector 44 passes through two number lines 58 and 56 phase of control cabinet
Even, electric four-way valve 45 is connected by three number lines 61 with control cabinet 56, outer on control cabinet 56 to extend equipment control line 59, if
Standby control line 59 is connected with vacuum pump 7 and air blower 47 respectively.
40 installed in front of cabinet body has hatch door 52 corresponding with rock sample accommodation chamber 41, matches on hatch door 52 equipped with 40 leading flank of cabinet body
The rotation lock 53 of conjunction；When rotation lock 53 is locked, hatch door 52 seals rock sample accommodation chamber 41, when rotation lock 53 is opened, opens hatch door
52, rock sample is put into or is taken out rock sample accommodation chamber 41；Attaching plug 64 and total power button 65, cabinet is arranged in 40 right hand external of cabinet body
40 bottom of body is equipped with four universal wheels 66, and 40 left upper portion of cabinet body and right upper portion are mounted on a handle 67, cabinet body 40
Regulated power supply 69 is inside installed, regulated power supply 69 is connect by output power line 68 with control cabinet 56, and regulated power supply 69 passes through defeated
Enter power supply line 70 to connect with attaching plug 64.Grid air hole 60 is provided on the left of cabinet body 40.
Rock coring gas collecting apparatus in step 3 includes column 1, and being horizontally disposed on column 1 has testing stand 2, testing stand 2
On be fixed with the test cylinder 3 of cylindrical structure, the center line of test cylinder 3 is arranged in vertical, solid on 3 inner wall of test cylinder
Surely rock column location structure and the rock column axial positioning structure above rock column circumferential positioning structure, test cylinder 3 are equipped with
Upper end outer side edges have mounting disc 4 along horizontally disposed, and 4 upper surface of mounting disc is removably connected with by fastening bolt 5 by test cylinder 3
The sealing cover 6 of sealing, sealing cover 6 in intermediate curved-surface structure protruding upward, 6 lower surface of sealing cover and 4 upper surface of mounting disc it
Between the first sealing ring 7, sealing cover 6 be equipped with lower end with the water injection pipe 8, blow-down pipe 9 and gauge line that are connected to inside test cylinder 3
10；2 lower surface of testing stand is connected with the drainpipe 11 being connected to inside test cylinder 3, and drainpipe 11 is equipped with drain valve 12.
4 lower surface of mounting disc is fixed with two about the symmetrical lifting motor 13 in 3 center of test cylinder, each lifting electricity
The main shaft of machine 13 passes through mounting disc 4 vertically upward and coaxial is sequentially connected with a lead screw 14, equal spiral shell on every lead screw 14
Line is connected with a sleeve 15, is connected between two sleeves 15 by one piece of mounting plate 16, and the middle part upper surface of mounting plate 16 is solid
Surely it is equipped with a coring motor 17, the main shaft of coring motor 17 passes through mounting plate 16 vertically downward and coaxial is sequentially connected with brill
Cylinder 18,18 lower circumferential edge of drilling pipe are provided with the diamond drilling sword 19 of dentation, and drilling pipe 18 passes through sealing cover 6 from top to bottom and stretches
Enter into test cylinder 3, the second sealing ring 20 with the sealing cooperation of 18 outer wall of drilling pipe is provided on sealing cover 6；4 upper surface of mounting disc
Two are vertically fixed with about the symmetrical guide rod 21 in 3 center of test cylinder, is connected with and respectively corresponds on mounting plate 16
The guide plate 22 being slidably located on a guide rod 21.
4 upper surface of mounting disc is vertically equipped at least four struts 23 along 3 center line circular array of test cylinder arrangement, owns
23 upper end of strut is connected with the water tank 24 that an entirety is in circular ring shape, and lead screw 14 and guide rod 21 are respectively positioned on the inside of water tank 24, note
The water inlet of water pipe 8 is connected to the bottom of water tank 24, and water injection valve 25 is provided on water injection pipe 8.
Vacuum pump 26 is provided on water tank 24, mounting disc 4 is equipped with expansion box 27, be connected with pressure gauge on expansion box 27
28, the upper end of gauge line 10 is connect with expansion box 27, and metering ball valve 29 is provided on gauge line 10, is provided with and puts on blow-down pipe 9
Empty ball valve 31.
It is provided on testing stand 2 for controlling lifting motor 13, coring motor 17 and the opening and closing of vacuum pump 26 and revolving speed
Control device 39.
Rock column location structure is provided with two layers, and every layer of rock column location structure includes four radial along test cylinder 3
The locating rod 32 of setting, four locating rods 32 arrange along the centerline direction circumference array of test cylinder 3, every locating rod 32 it is outer
End fixation is located on 3 inner wall of test cylinder, and every 32 inner end of locating rod is fixed with one piece of arc panel 33, four pieces of arc panels 33
Center line be overlapped with the center line of test cylinder 3.
Rock column axial positioning structure includes positioning ring flat-plate 34 and three pieces of fixed plates 35, and the outer circumferential walls of positioning ring flat-plate 34 are solid
Surely three pieces of connecting plates 36, three pieces of fixed plates 35 along 3 center line circular array of test cylinder arrangement are equipped with, the fixation of fixed plate 35 is located at
On 3 inner wall of test cylinder, respectively corresponds on three pieces of connecting plates 36 and connect with one piece of fixed plate 35 by positioning bolt 37.
Step 2 specifically includes following procedure:
1) starting of rock sample (i.e. rock column 38) internal fissure detection device；
2) calibration of rock sample accommodation chamber 41 and gas detection cabin 42；
3) rock sample internal fissure test experience；
4) instrument after rock sample internal fissure test experience arranges.
Step 1) specifically includes following procedure:
A, rock sample internal fissure detection device is pushed away and is placed on smooth ground；
B, by the attaching plug 64 of civilian 220V plant-grid connection rock sample internal fissure detection device；
C, the total power button 65 on 64 side of attaching plug is pressed, each component is powered in rock sample internal fissure detection device.
Step 2 specifically includes following procedure:
A, rock sample internal fissure detection device is pushed away and is placed on smooth ground；
B, by the attaching plug 64 of civilian 220V plant-grid connection rock sample internal fissure detection device；
C, the total power button 65 on 64 side of attaching plug is pressed, each component is powered in rock sample internal fissure detection device.
Step 3) specifically includes following procedure:
I, after " gas calibration " EP (end of program), hatch door 52 is opened, the rock sample prepared is placed in rock sample accommodation chamber, closes cabin
Door 52 simultaneously locks rotation lock 53；
II, " rock sample detection " order is assigned on operation panel 54, it is true to be automatically regulated to be connection for electric four-way valve 45 at this time
Sky pump 46 and gas detection cabin 42, the subsequent starting of vacuum pump 46 start to depressurize for rock sample accommodation chamber 41 and gas detection cabin 42, subtract
44 real time readouts of methane detection instrument 43 and air pressure detector during pressure, marked gas detect methane content and air pressure in cabin 42
Value, when methane concentration reaches the threshold value of setting, information is fed back on operation panel 54, shows current rock sample internal interstices development
Intact, when atmospheric pressure value reaches the threshold value of setting, vacuum pump 46 stops working, and prevents in cabin that air pressure is too low to cause equipment damage；
III, " pressing again in cabin " order after " rock sample detection " EP (end of program), is assigned on operation panel 54, at this time electric four passes
The 4th interface and gas detection cabin 42 that valve 45 is slowly connected to are that gas detection cabin 42 and rock sample accommodation chamber 41 restore gas
Pressure.
Step 4) specifically includes following procedure:
1., after " in cabin again press " order, open hatch door 52, rock sample taken out；
2., assign on operation panel 54 " gas cleaning " order, electric four-way valve 45 is automatically regulated to be connection drum at this time
Blower 47 and gas detection cabin 42 start air blower 47 1 minutes later, are that rock sample accommodation chamber 41 and gas detection cabin 42 are divulged information,
Eliminate methane gas present in it；
3., press the total power button 65 on the side of attaching plug 64, powered off for rock sample internal fissure detection device, will be in rock sample
Portion's crack detecting device, which is shifted onto, puts in order position.
Step 3 specifically includes following procedure:
(1) the rock column 38 of Crack Detection qualification is put into test cylinder 3, the outer diameter of the rock column 38 of acquisition is equal to or slightly
Less than the internal diameter of arc panel 33, the intrados of totally 8 pieces of arc panels 33 is bonded with 38 extrados of rock column to rock column upper layer and lower layer
38 carry out radial limit, and positioning ring flat-plate 34 is then placed into 38 upper end of rock column, is connected and fixed plate 35 using positioning bolt 37
With connecting plate 36, ring flat-plate 34 and 38 press fit of rock column are positioned, axial limiting is risen to rock column 38；
(2) emptying ball valve 31 and water injection valve 25 are opened, closes drain valve 12 and metering ball valve 29, the water in water tank 24 is in height
It is flowed into 3 body of test cylinder under degree difference effect through water injection pipe 8, with the raising of the water surface in test cylinder 3, air is by 9 row of blow-down pipe
Out, the first sealing ring 7 and the second sealing ring 20 play the role of avoiding gas leakage and leak, when drained air fills in 3 body of test cylinder
After full water, emptying ball valve 31 and water injection valve 25 are closed；
(3) it keeps metering ball valve 29 to be in off state, opens vacuum pump 26, vacuumize process is carried out to expansion box 27, is led to
It crosses the progress of pressure gauge 28 27 internal pressure of expansion box connected at the top of expansion box 27 to show, be beaten after the completion of expansion box 27 vacuumizes
Open metering ball valve 29；
(4) start coring motor 17 and two lifting motors 13, the revolving speed of two lifting motors 13 is identical, lifting motor 13
It drives lead screw 14 to rotate, limits sleeve 15 with the rotation of lead screw 14, with lead screw 14 since guide plate 22 is set on guide rod 21
Rotation, sleeve 15 are moved downward along lead screw 14, and the mounting plate 16 between two sleeves 15 drives coring motor 17 to realize to lower axle
To feed motion, coring motor 17 drives drilling pipe 18 to rotate, the diamond drilling sword 19 of 18 lower end of drilling pipe cut rock column 38 into
Row coring；
(5) for drilling pipe 18 during circumgyration incision rock column 38, the water in test cylinder 3 plays lubrication to hard rock drilling sword
Cooling effect, while 38 internal fracture rock of rock column can discharge gas, discharged gas enters expansion box due to differential pressure action
Gas pressure change in expansion box 27 is shown in 27 and by pressure gauge 28, to realize in location of the coring procedure to 38 institute of rock column
The gas of release is collected and shows；
(6) volume of acquisition gas is obtained by the conversion pressure that the intrinsic volume of expansion box 27 and pressure gauge 28 are shown；
(7) drain valve 12 is opened, the water in test cylinder 3 is discharged by drainpipe 11, then will be cut isolated core and is taken
Out.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (9)
1. a kind of shale rock sample sealing propertytest and coring gas collection simulation experiment method, it is characterised in that: the following steps are included:
One, rock column first is prepared in actual well drilled place, rock column is not had using the position in fine and close shale gas-bearing formation bosom in gas
In the case where having evolution, processing is sealed to rock column, is transported in laboratory；
Two, rock column is placed into rock sample internal fissure detection device and carries out Crack Detection；
Three, the rock column after Crack Detection is qualified, which is placed into rock coring gas collecting apparatus, carries out coring gas collection；
Rock sample internal fissure detection device in step 2 includes cabinet body, be provided in cabinet body rock sample accommodation chamber, gas detection cabin,
Electric four-way valve, vacuum pump and air blower, rock sample accommodation chamber is columnar structured in front end opening, and rock sample accommodation chamber front end passes through
Screw is fixedly connected on the front inner wall of cabinet body, and gas detection cabin is arranged in the intracorporal bottom of cabinet and passes through with rock sample accommodation chamber
Sealed fitting is connected, and methane detection instrument and air pressure detector is equipped in gas detection cabin, gas detection cabin passes through intake and exhaust
Pipeline is connected with first interface of electric four-way valve, and second interface of electric four-way valve passes through gas exhaust piping and vacuum pump phase
Even, the third interface of electric four-way valve is connected by air inlet pipeline with air blower, and the 4th interface of electric four-way valve connects sky；
Outer surface is equipped with operation panel on front side of cabinet body, and operation panel is equipped with start button and scram button, bottom in cabinet body
Control cabinet is installed, operation panel is connected by data/address bus with control cabinet, and methane detection instrument passes through No.1 data line and control
Cabinet is connected, and air pressure detector is connected by two number lines with control cabinet, and electric four-way valve passes through three number lines and control cabinet
It is connected, outer on control cabinet to extend equipment control line, equipment control line is connected with vacuum pump and air blower respectively；
Cabinet body installed in front has hatch door corresponding with rock sample accommodation chamber, the rotation lock equipped with the cooperation of cabinet body leading flank on hatch door；Rotation
When twist lock is locked, hatch door seals rock sample accommodation chamber, when rotation lock is opened, opens hatch door, rock sample is put into or is taken out rock sample appearance
Receive cabin；Cabinet body right hand external is arranged attaching plug and total power button, and bottom of cabinet bulk is equipped with four universal wheels, on the left of cabinet body on
Portion and right upper portion are mounted on a handle, and regulated power supply is equipped in cabinet body, and regulated power supply passes through output power line and control
Cabinet connection processed, regulated power supply are connect by input power cord with attaching plug；Grid air hole is provided on the left of cabinet body.
2. a kind of shale rock sample sealing propertytest according to claim 1 and coring gas collection simulation experiment method, feature
Be: the rock coring gas collecting apparatus in step 3 includes column, and being horizontally disposed on column has testing stand, and fixation is set on testing stand
There is the test cylinder of cylindrical structure, the center line of test cylinder is arranged in vertical, and is fixed with rock on test cylinder inner wall
Column location structure and the rock column axial positioning structure above rock column circumferential positioning structure, test cylinder upper end outer side edges edge
Horizontally disposed to have mounting disc, mounting disc upper surface is removably connected with the sealing cover for sealing test cylinder by fastening bolt, close
The first sealing ring between lower surface and mounting disc upper surface is covered, sealing cover is equipped with the note that lower end is connected to test cylinder inside
Water pipe, blow-down pipe and gauge line；Testing stand lower surface is connected with the drainpipe being connected to test cylinder inside, and drainpipe is equipped with row
Water valve；
Mounting disc lower surface is fixed with two about the symmetrical lifting motor in test cylinder center, the main shaft of each lifting motor
Vertically upward pass through mounting disc and it is coaxial be sequentially connected with a lead screw, a set is threaded on every lead screw
Tin, by one piece of mounting plate connection between two sleeves, the middle part upper surface of mounting plate is fixed with a coring motor, coring
The main shaft of motor pass through vertically downward mounting plate and it is coaxial be sequentially connected with drilling pipe, drilling pipe lower circumferential edge is provided with dentation
Diamond drilling sword, drilling pipe passes through sealing cover from top to bottom and extend into test cylinder, be provided on sealing cover and drilling pipe outer wall
Seal the second sealing ring of cooperation；Mounting disc upper surface be vertically fixed with two it is symmetrical about test cylinder center
Guide rod is connected with the guide plate for respectively corresponding and being slidably located on a guide rod on mounting plate；
Mounting disc upper surface is vertically equipped at least four struts along test cylinder center line circular array arrangement, all strut upper ends
It is connected with the water tank that an entirety is in circular ring shape, lead screw and guide rod are respectively positioned on the inside of water tank, and the water inlet of water injection pipe is connected to
The bottom of water tank is provided with water injection valve on water injection pipe；
Vacuum pump is provided on water tank, mounting disc is equipped with expansion box, be connected with pressure gauge on expansion box, the upper end of gauge line with
Expansion box connects, and is provided with metering ball valve on gauge line, emptying ball valve is provided on blow-down pipe；
The control device for controlling lifting motor, coring motor and vacuum pump opening and closing and revolving speed is provided on testing stand.
3. a kind of shale rock sample sealing propertytest according to claim 2 and coring gas collection simulation experiment method, feature
Be: rock column location structure is provided with two layers, and every layer of rock column location structure includes four and is arranged radially along test cylinder
Locating rod, four locating rods along test cylinder centerline direction circumference array arrange, the outer end of every locating rod fixation sets
On test cylinder inner wall, every locating rod inner end is fixed with one piece of arc panel, the center line and test cylinder of four pieces of arc panels
Center line be overlapped；
Rock column axial positioning structure includes that positioning ring flat-plate and three pieces of fixed plates, the outer circumferential walls for positioning ring flat-plate are fixed with three pieces
Connecting plate, three pieces of fixed plates along test cylinder center line circular array arrangement, fixed plate fixation are located on test cylinder inner wall, and three pieces
It respectively corresponds on connecting plate and is connect with one piece of fixed plate by positioning bolt.
4. a kind of shale rock sample sealing propertytest according to claim 3 and coring gas collection simulation experiment method, feature
Be: step 2 specifically includes following procedure:
1) starting of rock sample internal fissure detection device；
2) calibration of rock sample accommodation chamber and gas detection cabin；
3) rock sample internal fissure test experience；
4) instrument after rock sample internal fissure test experience arranges.
5. a kind of shale rock sample sealing propertytest according to claim 4 and coring gas collection simulation experiment method, feature
Be: step 1) specifically includes following procedure:
A, automatic rock sample internal fissure detection device is pushed away and is placed on smooth ground；
B, by the attaching plug of civilian 220V plant-grid connection rock sample internal fissure detection device；
C, the total power button by attaching plug is pressed, each component is powered in rock sample internal fissure detection device.
6. a kind of shale rock sample sealing propertytest according to claim 4 and coring gas collection simulation experiment method, feature
Be: step 2 specifically includes following procedure:
A, the start button on pushing operation panel, the booting of rock sample internal fissure detection device；
B, hatch door is opened, " gas cleaning " order is assigned on operation panel, electric four-way valve is automatically regulated to be connection drum at this time
Then blower and gas detection cabin start air blower one minute, be that rock sample accommodation chamber and gas detection cabin are divulged information, elimination wherein may be used
Interference gas existing for energy；
C, after " gas cleaning " EP (end of program), " gas calibration " order is assigned on operation panel, electric four-way valve is automatic at this time
It is adjusted to the 4th interface and the gas detection cabin of connection electric four-way valve, methane detection instrument and air pressure detector reading zero.
7. a kind of shale rock sample sealing propertytest according to claim 6 and coring gas collection simulation experiment method, feature
Be: step 3) specifically includes following procedure:
I, after " gas calibration " EP (end of program), hatch door is opened, the rock sample prepared is placed in rock sample accommodation chamber, hatch door is closed and locks
Tight rotation lock；
II, " rock sample detection " order is assigned on operation panel, it is gentle to be automatically regulated to be connection vacuum pump for electric four-way valve at this time
Cabin is surveyed in physical examination, and subsequent vacuum pump startup starts to depressurize for rock sample accommodation chamber and gas detection cabin, methane detection instrument in decompression process
With air pressure detector real time readouts, marked gas detects the methane content and atmospheric pressure value in cabin, when methane concentration reaches setting
When threshold value, information is fed back on operation panel, shows that current rock sample internal interstices development is intact, when atmospheric pressure value reaches the threshold of setting
When value, vacuum pump stops working, and prevents in cabin that air pressure is too low to cause equipment damage；
III, " pressing again in cabin " order after " rock sample detection " EP (end of program), is assigned on operation panel, electric four-way valve is slow at this time
4th interface of ground connection and gas detection cabin are that gas detection cabin and rock sample accommodation chamber restore air pressure.
8. a kind of shale rock sample sealing propertytest according to claim 7 and coring gas collection simulation experiment method, feature
Be: step 4) specifically includes following procedure:
1., after " in cabin again press " order, open hatch door, rock sample taken out；
2., assign on operation panel " gas cleaning " order, it is gentle to be automatically regulated to be connection air blower for electric four-way valve at this time
Cabin is surveyed in physical examination, is started air blower one minute later, is that rock sample accommodation chamber and gas detection cabin are divulged information, is eliminated methane present in it
Gas；
3., press total power button by attaching plug, powered off for rock sample internal fissure detection device, rock sample internal fissure examined
Survey device, which is shifted onto, puts in order position.
9. a kind of shale rock sample sealing propertytest according to claim 3 and coring gas collection simulation experiment method, feature
Be: step 3 specifically includes following procedure:
(1) the rock column of Crack Detection qualification is put into test cylinder, the outer diameter of the rock column of acquisition is equal to or slightly less than arc
The internal diameter of plate, the intrados of totally 8 pieces of arc panels is bonded to the radial limit of rock column progress, so upper layer and lower layer with rock column extrados
Positioning ring flat-plate is placed into rock column upper end afterwards, is connected and fixed plate and connecting plate, positioning ring flat-plate and rock column using positioning bolt
Press fit plays axial limiting to rock column；
(2) emptying ball valve and water injection valve are opened, drain valve and metering ball valve are closed, the water in water tank is under difference in height effect through infusing
Water pipe is flowed into test cylinder, and with the raising of the water surface in test cylinder, air is discharged by blow-down pipe, the first sealing ring and second
Sealing ring plays the role of avoiding gas leakage and leak, after drained air is full of water in test cylinder, closes emptying ball valve and note
Water valve；
(3) it keeps metering ball valve to be in off state, opens vacuum pump, vacuumize process is carried out to expansion box, passes through expansion box top
The pressure gauge of portion's connection carries out expansion box internal pressure and shows, metering ball valve is opened after the completion of expansion box vacuumizes；
(4) start coring motor and two lifting motors, the revolving speed of two lifting motors is identical, and lifting motor drives lead screw to turn
It is dynamic, it limits sleeve since guide plate is set on guide rod and is rotated with lead screw, with the rotation of lead screw, sleeve is transported downwards along lead screw
Dynamic, the mounting plate between two sleeves drives coring motor to realize feed motion axially downwards, and coring motor drives drilling pipe rotation,
The diamond drilling sword cutting rock column of drilling pipe lower end carries out coring；
(5) for drilling pipe during circumgyration incision rock column, the water in test cylinder plays the role of lubrication cooling to hard rock drilling sword,
Rock column internal fracture rock can discharge gas simultaneously, and discharged gas is since differential pressure action enters in expansion box and passes through pressure
Table shows gas pressure change in expansion box, thus realize rock column is discharged in location of the coring procedure gas be collected and
Display；
(6) volume of acquisition gas is obtained by the conversion pressure that the intrinsic volume of expansion box and pressure gauge are shown；
(7) drain valve is opened, the water in test cylinder is discharged by drainpipe, then will be cut isolated core and is taken out.
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| CN110631951B (en) * | 2018-06-22 | 2021-11-09 | 中国石油化工股份有限公司 | On-site detection device and method for shale desorption gas |
| CN112033770A (en) * | 2018-07-26 | 2020-12-04 | 杜瑞青 | Sampling collector for pretreatment of underground mine gas containing large amount of dust and use method |
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| CN201909732U (en) * | 2010-12-24 | 2011-07-27 | 中国石油天然气股份有限公司 | Portable tester of shale gas and coal bed gas |
| CN202453266U (en) * | 2012-03-07 | 2012-09-26 | 中国石油天然气股份有限公司 | Gas content testing device |
| CN103063545B (en) * | 2012-12-28 | 2015-01-07 | 恒泰尚合能源技术（北京）有限公司 | Shale gas content detecting method |
| CN104131803A (en) * | 2013-05-10 | 2014-11-05 | 中国石油大学(北京) | Experiment method for evaluating shale fracturing crack mesh forming capability |
| CN103808592A (en) * | 2014-03-04 | 2014-05-21 | 江苏珂地石油仪器有限公司 | Gas content tester for shale gas |
| CN104713802B (en) * | 2015-04-01 | 2018-12-04 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | A kind of shale gas reservoir gassiness weight testing method |
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