CN109488284A - Coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device - Google Patents
Coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device Download PDFInfo
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- CN109488284A CN109488284A CN201811402129.XA CN201811402129A CN109488284A CN 109488284 A CN109488284 A CN 109488284A CN 201811402129 A CN201811402129 A CN 201811402129A CN 109488284 A CN109488284 A CN 109488284A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000008569 process Effects 0.000 title claims abstract description 43
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000005065 mining Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000004088 simulation Methods 0.000 claims abstract description 53
- 238000012546 transfer Methods 0.000 claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims description 65
- 230000008595 infiltration Effects 0.000 claims description 53
- 238000001764 infiltration Methods 0.000 claims description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 36
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 238000005086 pumping Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 11
- 239000002817 coal dust Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 39
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000011068 loading method Methods 0.000 description 7
- 230000003068 static effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000000644 propagated effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 208000032843 Hemorrhage Diseases 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 208000034158 bleeding Diseases 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- BULVZWIRKLYCBC-UHFFFAOYSA-N phorate Chemical compound CCOP(=S)(OCC)SCSCC BULVZWIRKLYCBC-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention discloses coal bed gas straight well mining process hydraulic pressure propagation distance simulating test devices, including straight well drainage system and several groups hydraulic pressure variable load system；Straight well drainage system includes pedestal and bracket, the quantity simulation wellbore hole equal with hydraulic pressure variable load system is provided on pedestal, equal thread seal is connected with pressurization cylinder in each simulation wellbore hole, and cradle top is provided with that one-to-one guide hole, pressurization cylinder are threaded through in guide hole up and down with simulation wellbore hole；Every group of hydraulic pressure variable load system passes through the hydraulic pressure transfer tube correspondence that one passes through chassis interior and connect with the lower port of simulation wellbore hole.The present invention can be monitored the permeability variation of different directions during coal bed gas straight well mining；It can more actually monitor hydraulic pressure propagation law caused by different directions permeability variation during coal bed gas well mining, relatively accurate test can be carried out, to hydraulic pressure propagation distance in the case of different reservoir permeability, mining process permeability variation to lay the foundation for coal bed gas straight well gas production Accurate Prediction.
Description
Technical field
The invention belongs to coal bed gas extraction technical field more particularly to a kind of coal bed gas straight well mining process hydraulic pressure propagate away from
From simulating test device.
Background technique
When ground carries out cbm development, change coal bed gas in coal seam by adsorbed state by the water in mining coal seam
It is that can gas occur the main reason for desorbing output for free state.It also means that, if water when mining in coal seam is not
It can flow, then the space environment of Occurrence of Coalbed Methane will not change, and coal bed gas would not be changed into free from adsorbed state
State.The distance and range that hydraulic pressure is propagated are different, and gas desorption amount is also different, therefore, find out during mining hydraulic pressure propagate away from
From the premise for being accurate progress gas production prediction.
The differences such as bottom pressure, the supply situation of country rock water, mining time when coal reservoir fracture system, reservoir pressure, mining
It all will lead to the difference of hydraulic pressure propagation distance during mining.In order to find out the influence factor of hydraulic pressure propagation distance during mining
And propagation distance, some researchers are based on well testing principle, the derivation of hydraulic pressure propagation distance formula have been carried out in conjunction with Darcy's law, but
Hydraulic pressure propagation distance caused by reservoir sex differernce, mining process permeability variation do not consider, cause its calculated result with
The certain discrepancy of physical presence.The calculating that hydraulic pressure propagation distance is carried out using well-logging method, when longitudinally upper heterogeneity is poor in coal seam
When different smaller, result is little with actual difference.When longitudinally upper heterogeneity is stronger in coal seam, i.e., longitudinal upper permeability difference compared with
When big, what result represented is the furthest distance of disease spread during mining, and the hydraulic pressure that cannot relatively accurately reflect entire coal seam section passes
Distance is broadcast, there are great limitations for its production gas after guidance.Some researchers are soft using Esplise, Comet3.0 combination Matlab
Part simulates hydraulic pressure propagation during mining, equally cannot accurate expression reservoir heterogeneity and the infiltration of mining process
Rate changes the influence to hydraulic pressure propagation distance, analog result and the certain discrepancy of physical presence.Therefore, a set of there is an urgent need to develop
Test device, can be to permeability variation, bottom pressure, reservoir pressure during different coal reservoir fracture systems, mining etc. under the conditions of
Hydraulic pressure propagation distance carries out relatively accurate test, preferably to instruct the cicada tolerance of coal bed gas well to predict.
Summary of the invention
The present invention provides a kind of coal bed gas straight well mining process hydraulic pressure propagation to solve shortcoming in the prior art
Range simulation test device；The device can in the case of different reservoir permeability, mining process permeability variation hydraulic pressure propagate away from
From accurate test is carried out, to lay the foundation for coal bed gas straight well gas production Accurate Prediction.
In order to solve the above technical problems, the present invention adopts the following technical scheme: coal bed gas straight well mining process hydraulic pressure is propagated
Range simulation test device, including straight well drainage system and several groups hydraulic pressure variable load system, hydraulic pressure variable load system are arranged in straight well
Around drainage system；Straight well drainage system includes pedestal and bracket, and quantity has been arranged in vertical on pedestal and hydraulic pressure becomes
The equal simulation wellbore hole of loading system, pedestal lower end are fixed at pedestal side, thread seal connection in each simulation wellbore hole
Have a pressurization cylinder, pressurization cylinder upper end blocks, lower end opening is connected to simulation wellbore hole inside, cradle top be provided with on simulation wellbore hole
One-to-one guide hole, pressurization cylinder are threaded through in guide hole down, and simulation wellbore hole and pressurization cylinder are made of clear material, simulation wellbore hole
Side is in axial direction provided with scale, and each simulation wellbore hole lower part is respectively connected with a first pressure gauge；Every group of hydraulic pressure variable load
System passes through the hydraulic pressure transfer tube correspondence that one passes through chassis interior and connect with the lower port of simulation wellbore hole.
Every group of hydraulic pressure variable load system includes the first hand-rail type plunger pump, the second hand-rail type plunger pump, vacuum pump, water injecting tank
Device is seeped with controllable become；
The controllable infiltration device that becomes includes mounting base, is fixedly installed the change infiltration in rectangular shape in mounting base by fixing bolt
Case, becoming to seep to be horizontally disposed in case has top board and lower platen, and top board and lower platen slurry change are seeped and be divided into from top to bottom inside case
The surrounding outer wall of upper pressurizing chamber, middle change infiltration chamber and lower pressurizing chamber, top board and lower platen is slided with the inner wall surrounding for becoming infiltration case
It is tightly connected, change seeps the interior middle change infiltration chamber formed between top board and lower platen of case and seeps material, top board upside filled with change
Face and change, which are seeped, is provided with upper spring between box top, lower platen downside and change seep and be provided with lower spring between bottom portion, and first
The liquid injection port of hand-rail type plunger pump is connected to by the first liquid injection pipe with the middle outside for becoming infiltration chamber, and the middle inside for becoming infiltration chamber passes through described
Hydraulic pressure transfer tube one end connection；
Vacuum pump is connect with the first liquid injection pipe and hydraulic pressure transfer tube respectively by the first vacuum-pumping tube and the second vacuum-pumping tube, and first
The first valve is provided on vacuum-pumping tube and the second vacuum-pumping tube；
Second pressure gauge is provided on first hand-rail type plunger pump, the inlet of the first hand-rail type plunger pump passes through the first liquid suction pipe
It is connect with water injecting tank, the second valve is provided on the first liquid suction pipe；
The inlet of second hand-rail type plunger pump is connect by the second liquid suction pipe with water injecting tank, is provided with third on the second liquid suction pipe
Valve, the liquid injection port of the second hand-rail type plunger pump by the second liquid injection pipe respectively with the upper pressurizing chamber and lower platen above top board
The lower pressurizing chamber of lower section is connected to, and is provided with third pressure gauge on the second liquid injection pipe；
The 4th pressure gauge, the 4th valve and digital indication flow meter are provided on hydraulic pressure transfer tube, wherein the 4th pressure gauge is located at the 4th
Valve and change are seeped between case, and the 4th valve is between the 4th pressure gauge and digital indication flow meter.
It further include data acquisition monitoring system, data acquisition monitoring system is computer, and data acquisition monitoring system passes through
Data line is connect with first pressure gauge, second pressure gauge, third pressure gauge, the 4th pressure gauge and digital indication flow meter respectively.
Become infiltration material uniformly to be mixed by drying coal dust and small rubber ball ratio by weight into 1:6-1:3, the grain of dry coal dust
Diameter is for 200 mesh hereinafter, small rubber bulb diameter is between 1mm-3mm.
Several simulation wellbore holes successively side by side and are fixedly connected, and pressurization cylinder upper end is provided with handle and release nut.
By adopting the above technical scheme, the present invention carries out the detailed process of simulation test are as follows:
(1), material is seeped in preparation change, and seeps range according to change and be determined to infiltration material mixing ratio is become, and will become infiltration material and be filled into
Middle change is seeped intracavitary；
(2), hydraulic pressure variable load system and straight well drainage system are combined and are mounted and connected；
(3), the air-tightness of simulating test device is checked；
(4), range is seeped to the change for becoming infiltration infiltration rate to demarcate；
(5), it sets calibrated permeability and carries out hydraulic pressure propagation distance simulation test；
(6), data are analyzed and is handled, finally obtain hydraulic pressure propagation law under different situations.
The wherein detailed process of step (1) are as follows: mix the ratio that dry coal dust and small rubber ball are 1:3 by weight
Close vibration it is even after change be made seep materials for later use, back out fixing bolt, take out to become and seep case, by hydraulic pressure transfer tube or the first liquid injection pipe with
Becoming to seep the aperture of case connection the change mixed infiltration material is filled into change seeps intracavitary, and after the tamping that uses the rod, seeps case for becoming
Again it is attached in mounting base, and screws on fixing bolt；Material is seeped according to the above-mentioned change in one group of hydraulic pressure variable load system to fill
The process of material successively charges to other group of hydraulic pressure variable load system.
The detailed process of step (3) are as follows: the second valve and the 4th valve are closed, the first valve is opened and starts vacuum pump,
It seeps material internal free volume to the change that intracavitary filling is seeped in the middle change for becoming infiltration case to vacuumize, pumpdown time 30-60min,
Until reading on vacuum pump no more than until 0.01MPa, vacuum pump and the first valve are closed；Then the first hand-rail type of precession plunger
The plunger of pump opens the second valve, the plunger for screwing out the first hand-rail type plunger pump is taken out from water injecting tank to inner terminal position
Water, until the plunger of the first hand-rail type plunger pump is screwed out to outermost end position, the second valve is closed in completion of drawing water at this time；It opens
4th valve, the plunger centering change infiltration of precession the first hand-rail type plunger pump is intracavitary to be filled the water, and is filled to digital indication flow meter and is started
When having reading, the 4th valve is closed, the plunger for continuing the first hand-rail type of precession plunger pump is filled the water to change infiltration is intracavitary, to second
Pressure gauge and the 4th pressure gauge begin with reading and the two reading is not much different when 0.05MPa, stop the first hand-rail type of precession
The plunger of plunger pump, i.e. Water hydraulic static pressure loading are completed；After the completion of Water hydraulic static pressure loading, stand 3-5h, if at discovery interface tube without dripping or
Situation, that is, decision maker the air-tightness that seeps water is good；Occurs situation of dripping or seep water at certain interface tube if having, using linen thread at this
Locate winding processing；The process of airtight test is carried out successively to other group of hydraulic pressure variable load to one group of hydraulic pressure variable load system according to above-mentioned
System carries out airtight test.
The detailed process of step (4) are as follows: due in every group of hydraulic pressure variable load system become seep the short grained spatial position of material with
The otherness of distribution characteristics, the permeability that will lead to every group of change infiltration material is different, therefore after the completion of above-mentioned airtight test
The variation range of adjustable permeability of every group of hydraulic pressure variable load system must be demarcated；Every group of hydraulic pressure variable load device is carried out
Stocking process, airtight test process, all valves are in off state；The second valve is first opened, and screws out the first hand-rail type
The pumping that the plunger of plunger pump carries out hydraulic pressure is deposited, and the plunger to the first hand-rail type plunger pump is screwed out to the pump of the first hand-rail type plunger pump
Stop screwing out when body outermost end, and closes the second valve；At the same time, the second hand-rail type plunger pump is screwed out, top board is in upper bullet
It is resetted under the action of spring, lower platen resets under the action of lower spring, after the completion of operation, opens the 4th valve, and slowly at the uniform velocity
The plunger of precession the first hand-rail type plunger pump carries out Water hydraulic static pressure loading, and data acquisition monitoring system is to second pressure gauge, third at this time
The instantaneous flow q and integrated flux of pressure gauge, the pressure of the 4th pressure gauge and digital indication flow meterQIt reads, wherein third pressure
The registration of table is 0, when the instantaneous flow of digital indication flow meter reading is basicly stable, utilizes formulaIt is seeped to becoming
The original permeability of materialK 1It is calculated；In formulaQFor the integrated flux of water；LTo become the length for seeping material, that is, becomes infiltration case and exist
The side of the first liquid injection pipe is connected to the distance of the side of connection hydraulic pressure transfer tube；It is known；PFor pressure difference, i.e., second pressure gauge with
The difference of 4th pressure gauge；gFor acceleration of gravity；vTo fill the water viscosity；At the same time, slow at the uniform velocity the second hand-rail type of precession column
The plunger of pump is filled in, third pressure gauge starts to read at this timeP 1, and second pressure gauge, the 4th pressure gauge and digital indication flow meter
Reading the variation of decline takes place, i.e., any pressure spot can be calculated according to formulaP 1Lower corresponding become seeps material
Permeability, when the water in the plunger for continuing the second hand-rail type of precession plunger pump, water injecting tank is pressed into pressurizing chamber and lower pressurization
Intracavitary, top board and lower platen separately down and move up and seep material and pressurize to becoming, until being forced into a certain pressure spot
When afterwards, when the permeability that material is seeped in change is no longer decreased obviously, stop the first hand-rail type plunger pump of load and the second hand-rail type
Plunger pump, at this time pressure spotP 1Permeability under correspondingK 2You can get it each pressure spotP 1Permeability curve under corresponding, and can
Controlling the range of permeability changed isK 2-K 1；Range calibration process completion is seeped in change controllable at this time；Then according to above-mentioned to one
The hydraulic pressure variable load system that the process that the variation range that infiltration rate is seeped in change in group hydraulic pressure variable load system is demarcated organizes other
The variation range that infiltration rate is seeped in change in system is demarcated.
The detailed process of step (5) are as follows: pressurization cylinder is all screwed into the top of simulation wellbore hole upwards, is then turned on each
The 4th valve in group hydraulic pressure variable load system, while the first hand-rail type plunger pump of operation and the second hand-rail type plunger pump are added
Pressure, to the water surface in simulation wellbore hole height between the 1/4-1/3 of simulation wellbore hole overall length and four groups of simulation wellbore hole liquid levels all
When identical, the first hand-rail type plunger pump and the second hand-rail type plunger pump are stopped operation, release nut is then turned on and transfers pressurization
Cylinder closes release nut to when contacting with the water surface in simulation wellbore hole；Operate the operation of each group hydraulic pressure variable load system again at this time
One hand-rail type plunger pump and the second hand-rail type plunger pump are suitably pressurizeed, and observe first pressure gauge, second pressure gauge, the at this time
The reading of three pressure gauges, the pressure of the 4th pressure gauge and digital indication flow meter is lifted up each after 0.5h stable reading
Pressurization cylinder in simulation wellbore hole to 1/2 position of simulation wellbore hole height, observe and record each first pressure gauge, second pressure gauge,
The reading of third pressure gauge, the pressure of the 4th pressure gauge and digital indication flow meter, digital indication flow meter can change at this time, to one
This time is recorded when digital indication flow meter reading no longer changes after fixing timet, then related instantaneous flow and time can be obtained
Function, and from relational expressionKnow flow velocityVWith the timetRelational expression, which is integrated,
It can obtain becoming the propagation distance for seeping material hydraulic pressure under this permeability state.Material is seeped according to the change calibrated in step (4)
The variation range of permeability is carried out according to the operating process in step (5), then to the propagation distance of the hydraulic pressure under other permeabilities
Test.
The present invention can carry out Load-unload pressure by more than two with the hydraulic pressure variable load system of time-varying permeability, and simulation is same
Because of the variation of mining process permeability in one horizontal direction；Added by hand-rail type plunger pump more than two progress vertical direction, unloaded
Pressure is carried, the variation of coal bed gas well straight well bleeding stage hydraulic pressure is simulated；Pass through flowmeter infiltration different from computer program progress
The calculating of hydraulic pressure attenuation coefficient obtains the distance that water outlet pressure is propagated in turn under rate.Monitor each hydraulic pressure variable load system and hand-rail type column
Plug pumps the foundation that body pressure is calculated as hydraulic pressure propagation attenuation parameter.
In conclusion the present invention can more actually the permeability variation to different directions during coal bed gas straight well mining into
Row monitoring；It can more actually monitor that hydraulic pressure caused by different directions permeability variation propagates rule during coal bed gas well mining
Rule can carry out relatively accurate test to hydraulic pressure propagation distance in the case of different reservoir permeability, mining process permeability variation, so as to
It lays the foundation for coal bed gas straight well gas production Accurate Prediction.
Detailed description of the invention
Fig. 1 is integral layout schematic diagram of the invention；
Fig. 2 is the enlarged structure schematic diagram of hydraulic pressure variable load system in Fig. 1；
Fig. 3 is the schematic view of facade structure of straight well drainage system in 1.
Specific embodiment
As shown in Figure 1-Figure 3, coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device of the invention, including
Four groups of hydraulic pressure variable load systems 2, hydraulic pressure variable load system is arranged in straight well drainage system 1 and several groups hydraulic pressure variable load system 2, the embodiment
2 are arranged in around straight well drainage system 1；Straight well drainage system 1 includes pedestal 3 and bracket 4, is vertically set on pedestal 3
It is equipped with the quantity simulation wellbore hole 5 equal with hydraulic pressure variable load system 2,4 lower end of bracket is fixed at 3 side of pedestal, each simulation
Equal thread seal is connected with pressurization cylinder 6 in pit shaft 5, and 6 upper end of pressurization cylinder blocks, is connected to inside lower end opening and simulation wellbore hole 5, props up
It is provided at the top of frame 4 and is threaded through in guide hole 7 with the one-to-one guide hole 7 of about 5 simulation wellbore hole, pressurization cylinder 6,5 He of simulation wellbore hole
Pressurization cylinder 6 is made of clear material, and 5 side of simulation wellbore hole is in axial direction provided with scale 8, each 5 lower part of simulation wellbore hole
It is respectively connected with a first pressure gauge 9；The hydraulic pressure transfer tube that every group of hydraulic pressure variable load system 2 is passed through inside pedestal 3 by one
10 correspondences are connect with the lower port of simulation wellbore hole 5.
Every group of hydraulic pressure variable load system 2 includes the first hand-rail type plunger pump 11, the second hand-rail type plunger pump 12, vacuum pump
13, water injecting tank 14 and controllable become seep device；
The controllable infiltration device that becomes includes mounting base 15, is fixedly installed the change in rectangular shape in mounting base 15 by fixing bolt
Case 16 is seeped, becoming to seep to be horizontally disposed in case 16 has top board 17 and lower platen 18, and top board 17 and lower platen 18 are starched to become and be seeped in case 16
Portion is divided into upper pressurizing chamber 19 from top to bottom, chamber 20 and lower pressurizing chamber 21 are seeped in middle change, outside the surrounding of top board 17 and lower platen 18
Wall is slidably and sealingly connected with the inner wall surrounding for becoming infiltration case 16, is formed between top board 17 and lower platen 18 in change infiltration case 16
Middle change seeps chamber 20 filled with infiltration material 22 is become, and 17 upper side of top board and change, which are seeped, is provided with upper spring 23 between 16 top of case, under
18 downside of pressing plate and become to seep and is provided with lower spring 24 between 16 bottom of case, the liquid injection port of the first hand-rail type plunger pump 11 passes through the
One liquid injection pipe 42 is connected to the middle outside for becoming infiltration chamber 20, middle to become the one end for seeping the inside of chamber 20 by the hydraulic pressure transfer tube 10
Connection；
Vacuum pump 13 by the first vacuum-pumping tube 25 and the second vacuum-pumping tube 26 respectively with the first liquid injection pipe 42 and hydraulic pressure transfer tube
10 connect, and are provided with the first valve 27 on the first vacuum-pumping tube 25 and the second vacuum-pumping tube 26；
Second pressure gauge 28 is provided on first hand-rail type plunger pump 11, the inlet of the first hand-rail type plunger pump 11 passes through first
Liquid suction pipe 29 is connect with water injecting tank 14, and the second valve 30 is provided on the first liquid suction pipe 29；
The inlet of second hand-rail type plunger pump 12 is connect by the second liquid suction pipe 31 with water injecting tank 14, is set on the second liquid suction pipe 31
Be equipped with third valve 32, the liquid injection port of the second hand-rail type plunger pump 12 by the second liquid injection pipe 33 respectively with 17 top of top board
Upper pressurizing chamber 19 is connected to the lower pressurizing chamber 21 of 18 lower section of lower platen, is provided with third pressure gauge 34 on the second liquid injection pipe 33；
The 4th pressure gauge 35, the 4th valve 36 and digital indication flow meter 37 are provided on hydraulic pressure transfer tube 10, wherein the 4th pressure gauge
35 are located at the 4th valve 36 and become between infiltration case 16, and the 4th valve 36 is between the 4th pressure gauge 35 and digital indication flow meter 37.
The invention also includes data acquisition monitoring system 38, data acquisition monitoring system 38 is computer, data acquisition prison
Control system 38 by data line 41 respectively with first pressure gauge 9, second pressure gauge 28, third pressure gauge 34, the 4th pressure gauge 35
It is connected with digital indication flow meter 37.
Become infiltration material 22 and is uniformly mixed by dry coal dust and small rubber ball ratio by weight into 1:6-1:3, dry coal dust
Partial size is for 200 mesh hereinafter, small rubber bulb diameter is between 1mm-3mm.
Several simulation wellbore holes 5 successively side by side and are fixedly connected, and 6 upper end of pressurization cylinder is provided with handle 39 and release nut
40。
The detailed process of present invention progress simulation test are as follows:
(1), material 22 is seeped in preparation change, and is determined according to infiltration range is become to infiltration 22 mixing ratio of material is become, and seeps material 22 for becoming
Change is filled into seep in chamber 20；
(2), hydraulic pressure variable load system 2 and straight well drainage system 1 are combined and are mounted and connected；
(3), the air-tightness of simulating test device is checked；
(4), range is seeped to the change for becoming infiltration 22 permeability of material to demarcate；
(5), it sets calibrated permeability and carries out hydraulic pressure propagation distance simulation test；
(6), data are analyzed and is handled, finally obtain hydraulic pressure propagation law under different situations.
The wherein detailed process of step (1) are as follows: mix the ratio that dry coal dust and small rubber ball are 1:3 by weight
It is spare that change infiltration material 22 is made after conjunction vibration is even, backs out fixing bolt, takes out change and seep case 16, pass through hydraulic pressure transfer tube 10 or the first note
Liquid pipe 42 seeps the aperture that connect of case 16 that the change mixed infiltration material 22 is filled into change infiltration is intracavitary with becoming, and uses the rod and consolidate it
Afterwards, infiltration case 16 will be become to be attached to again in mounting base 15, and screws on fixing bolt；According to above-mentioned in one group of hydraulic pressure variable load system 2
Change seep the process that charges of material 22, successively charge to other group of hydraulic pressure variable load system 2.
The detailed process of step (3) are as follows: close the second valve 30 and the 4th valve 36, open the first valve 27 and start true
Sky pump 13 seeps 22 internal free volume of material to the change filled in the middle change infiltration chamber 20 for becoming infiltration case 16 and vacuumizes, vacuumizes
Time 30-60min closes vacuum pump 13 and the first valve 27 until reading on vacuum pump 13 no more than until 0.01MPa；So
Back spin opens the second valve 30, screws out the first hand-rail type plunger into the plunger of the first hand-rail type plunger pump 11 to inner terminal position
The plunger of pump 11 draws water from water injecting tank 14, until the plunger of the first hand-rail type plunger pump 11 is screwed out to outermost end position,
It draws water at this time completion, closes the second valve 30；The 4th valve 36 is opened, the plunger centering of the first hand-rail type of precession plunger pump 11 becomes
It seeps and is filled the water in chamber 20, when being filled to digital indication flow meter 37 and beginning with reading, close the 4th valve 36, it is first-hand to continue precession
The plunger for shaking formula plunger pump 11 is filled the water to change infiltration is intracavitary, begins with reading simultaneously to second pressure gauge 28 and the 4th pressure gauge 35
The two reading is not much different when 0.05MPa, stops the plunger of the first hand-rail type of precession plunger pump 11, i.e. Water hydraulic static pressure loading is completed；
After the completion of Water hydraulic static pressure loading, 3-5h is stood, if without dripping or the i.e. decision maker air-tightness of situation that seeps water is good at discovery interface tube；
Occurs situation of dripping or seep water at certain interface tube if having, winding is handled at this using linen thread；According to above-mentioned to one group of hydraulic pressure
The process that variable load system 2 carries out airtight test successively carries out airtight test to other group of hydraulic pressure variable load system 2.
The detailed process of step (4) are as follows: seep the short grained spatial position of material 22 due to becoming in every group of hydraulic pressure variable load system 2
With the otherness of distribution characteristics, the permeability that will lead to every group of change infiltration material 22 is different, therefore complete to above-mentioned airtight test
Cheng Houxu demarcates the variation range of adjustable permeability of every group of hydraulic pressure variable load system 2；Every group of hydraulic pressure variable load is filled
It sets and carries out stocking process, airtight test process, all valves are in off state；It first opens the second valve 30, and screws out the
The pumping that the plunger of one hand-rail type plunger pump 11 carries out hydraulic pressure is deposited, and the plunger to the first hand-rail type plunger pump 11 is screwed out to first hand
Stop screwing out when the pump housing outermost end of formula plunger pump 11, and closes the second valve 30；At the same time, the second hand-rail type plunger is screwed out
Pump 12, top board 17 resets under the action of upper spring 23, and lower platen 18 resets under the action of lower spring 24, and operation is completed
Afterwards, the 4th valve 36 is opened, and slowly at the uniform velocity the plunger of the first hand-rail type of precession plunger pump 11, progress Water hydraulic static pressure loading count at this time
According to collection monitoring system 38 to the pressure and digital indication flow meter of second pressure gauge 28, third pressure gauge 34, the 4th pressure gauge 35
37 instantaneous flow q and integrated fluxQReading, wherein the registration of third pressure gauge 34 is 0, the instantaneous stream to digital indication flow meter 37
When amount reading is basicly stable, formula is utilizedTo the original permeability for becoming infiltration material 22K 1It is calculated；In formula
'sQFor the integrated flux of water；LThe length of material 22 is seeped for change, that is, is become and seeped case 16 in the side for connecting the first liquid injection pipe 42 to company
Water receiving presses the distance of the side of transfer tube 10；It is known；PFor pressure difference, the i.e. difference of second pressure gauge 28 and the 4th pressure gauge 35；g
For acceleration of gravity；vTo fill the water viscosity；At the same time, the slow at the uniform velocity plunger of the second hand-rail type of precession plunger pump 12, at this time
Three pressure gauges 34 start to readP 1, and the reading of second pressure gauge 28, the 4th pressure gauge 35 and digital indication flow meter 37 is opened
The variation for giving birth to drop is originated, i.e., can calculate any pressure spot according to formulaP 1The lower corresponding infiltration for becoming infiltration material 22
Rate, when the plunger for continuing the second hand-rail type of precession plunger pump 12, the water in water injecting tank 14 be pressed into pressurizing chamber 19 and it is lower plus
It presses in chamber 21, top board 17 and lower platen 18 separately down and move up and seep material 22 and pressurize to becoming, until being forced into
When after a certain pressure spot, when the permeability that material 22 is seeped in change is no longer decreased obviously, stop the first hand-rail type plunger pump of load
11 and the second hand-rail type plunger pump 12, pressure spot at this timeP 1Permeability under correspondingK 2You can get it each pressure spotP 1Under correspondence
Permeability curve, and the range of the controllable permeability changed isK 2-K 1；Range calibration process completion is seeped in change controllable at this time；
Then the process pair that the variation range of 22 permeability of material is demarcated is seeped according to the above-mentioned change in one group of hydraulic pressure variable load system 2
The variation range that 22 permeability of material is seeped in change in the hydraulic pressure variable load system 2 of other groups is demarcated.
The detailed process of step (5) are as follows: pressurization cylinder 6 is all screwed into the top of simulation wellbore hole 5 upwards, is then turned on every
The 4th valve 36 in one group of hydraulic pressure variable load system 2, while operating the first hand-rail type plunger pump 11 and the second hand-rail type plunger pump
12 pressurize, and the height to the water surface in simulation wellbore hole 5 is between the 1/4-1/3 of 5 overall length of simulation wellbore hole and four groups of simulation wellbore holes 5
When liquid level is all identical, the first hand-rail type plunger pump 11 and the second hand-rail type plunger pump 12 are stopped operation, release is then turned on
Nut 40 simultaneously transfers pressurization cylinder 6 to when contacting with the water surface in simulation wellbore hole 5, closes release nut 40；Operate each group again at this time
The first hand-rail type of the operation plunger pump 11 and the second hand-rail type plunger pump 12 of hydraulic pressure variable load system 2 are suitably pressurizeed, and are seen at this time
Survey first pressure gauge 9, second pressure gauge 28, third pressure gauge 34, the pressure of the 4th pressure gauge 35 and digital indication flow meter 37
Reading is lifted up pressurization cylinder 6 in each simulation wellbore hole 5 to the 1/2 of 5 height of simulation wellbore hole after 0.5h stable reading
Position, observe and record each first pressure gauge 9, second pressure gauge 28, third pressure gauge 34, the 4th pressure gauge 35 pressure and
The reading of digital indication flow meter 37, digital indication flow meter 37 can change at this time, not to the reading of digital indication flow meter 37 after a certain period of time
This time is recorded when changing againt, then the function in relation to instantaneous flow and time can be obtained, and from relational expressionKnow flow velocityVWith the timetRelational expression, which is integrated, change infiltration material 22 can be obtained and seeped herein
The propagation distance of hydraulic pressure under saturating rate state.The variation range that 22 permeability of material is seeped according to the change calibrated in step (4), according to
Operating process in step (5), then the propagation distance of the hydraulic pressure under other permeabilities is tested.
The present invention can carry out Load-unload pressure by more than two with the hydraulic pressure variable load system 2 of time-varying permeability, and simulation is same
Because of the variation of mining process permeability in one horizontal direction；Added by hand-rail type plunger pump more than two progress vertical direction, unloaded
Pressure is carried, the variation of coal bed gas well straight well bleeding stage hydraulic pressure is simulated；Pass through flowmeter infiltration different from computer program progress
The calculating of hydraulic pressure attenuation coefficient obtains the distance that water outlet pressure is propagated in turn under rate.Monitor each hydraulic pressure variable load system 2 and hand-rail type
The foundation that plunger pump water body pressure is calculated as hydraulic pressure propagation attenuation parameter.
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 (5)
1. coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device, it is characterised in that: including straight well drainage system
With several groups hydraulic pressure variable load system, hydraulic pressure variable load system is arranged in around straight well drainage system；Straight well drainage system includes bottom
Seat and bracket are arranged in vertical the quantity simulation wellbore hole equal with hydraulic pressure variable load system on pedestal, and pedestal lower end is fixed
Equal thread seal is set in pedestal side, each simulation wellbore hole and is connected with pressurization cylinder, pressurization cylinder upper end blocks, lower end opening and
Connection inside simulation wellbore hole, cradle top are provided with that one-to-one guide hole, pressurization cylinder are threaded through guide hole up and down with simulation wellbore hole
Interior, simulation wellbore hole and pressurization cylinder are made of clear material, and simulation wellbore hole side is in axial direction provided with scale, each simulation
Lower wellbore is respectively connected with a first pressure gauge；Every group of hydraulic pressure variable load system passes through the hydraulic pressure that one passes through chassis interior and passes
Defeated pipe correspondence is connect with the lower port of simulation wellbore hole.
2. coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device according to claim 1, feature exist
In: every group of hydraulic pressure variable load system include the first hand-rail type plunger pump, the second hand-rail type plunger pump, vacuum pump, water injecting tank and can
Control, which becomes, seeps device；
The controllable infiltration device that becomes includes mounting base, is fixedly installed the change infiltration in rectangular shape in mounting base by fixing bolt
Case, becoming to seep to be horizontally disposed in case has top board and lower platen, and top board and lower platen slurry change are seeped and be divided into from top to bottom inside case
The surrounding outer wall of upper pressurizing chamber, middle change infiltration chamber and lower pressurizing chamber, top board and lower platen is slided with the inner wall surrounding for becoming infiltration case
It is tightly connected, change seeps the interior middle change infiltration chamber formed between top board and lower platen of case and seeps material, top board upside filled with change
Face and change, which are seeped, is provided with upper spring between box top, lower platen downside and change seep and be provided with lower spring between bottom portion, and first
The liquid injection port of hand-rail type plunger pump is connected to by the first liquid injection pipe with the middle outside for becoming infiltration chamber, and the middle inside for becoming infiltration chamber passes through described
Hydraulic pressure transfer tube one end connection；
Vacuum pump is connect with the first liquid injection pipe and hydraulic pressure transfer tube respectively by the first vacuum-pumping tube and the second vacuum-pumping tube, and first
The first valve is provided on vacuum-pumping tube and the second vacuum-pumping tube；
Second pressure gauge is provided on first hand-rail type plunger pump, the inlet of the first hand-rail type plunger pump passes through the first liquid suction pipe
It is connect with water injecting tank, the second valve is provided on the first liquid suction pipe；
The inlet of second hand-rail type plunger pump is connect by the second liquid suction pipe with water injecting tank, is provided with third on the second liquid suction pipe
Valve, the liquid injection port of the second hand-rail type plunger pump by the second liquid injection pipe respectively with the upper pressurizing chamber and lower platen above top board
The lower pressurizing chamber of lower section is connected to, and is provided with third pressure gauge on the second liquid injection pipe；
The 4th pressure gauge, the 4th valve and digital indication flow meter are provided on hydraulic pressure transfer tube, wherein the 4th pressure gauge is located at the 4th
Valve and change are seeped between case, and the 4th valve is between the 4th pressure gauge and digital indication flow meter.
3. coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device according to claim 2, feature exist
In: it further include data acquisition monitoring system, data acquisition monitoring system is computer, and data acquisition monitoring system passes through data line
It is connect respectively with first pressure gauge, second pressure gauge, third pressure gauge, the 4th pressure gauge and digital indication flow meter.
4. coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device according to claim 2, feature exist
In: become infiltration material and uniformly mixed by drying coal dust and small rubber ball ratio by weight into 1:6-1:3, the partial size of dry coal dust is
200 mesh hereinafter, small rubber bulb diameter between 1mm-3mm.
5. coal bed gas straight well mining process hydraulic pressure propagation distance simulating test device according to claim 1, feature exist
In: several simulation wellbore holes successively side by side and are fixedly connected, and pressurization cylinder upper end is provided with handle and release nut.
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| CN201811402129.XA CN109488284B (en) | 2018-11-23 | 2018-11-23 | Simulation test device for water pressure propagation distance in drainage and production process of coal bed gas vertical well |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015975A (en) * | 2012-12-31 | 2013-04-03 | 河南理工大学 | Gas production rate testing simulation device of coal-bed gas vertical well |
| EP2677119A2 (en) * | 2012-06-20 | 2013-12-25 | Rolls-Royce plc | Rotor balancing method |
| CN104763621A (en) * | 2015-03-27 | 2015-07-08 | 中联煤层气有限责任公司 | Sucker-rod pump device for coal seam gas exploitation |
| CN104863547A (en) * | 2015-04-13 | 2015-08-26 | 中国海洋石油总公司 | Pressure-propagation-based method for determining discharge and recovery speed at initial stage of coalbed methane exploitation |
| CN106202748A (en) * | 2016-07-14 | 2016-12-07 | 中国海洋石油总公司 | A kind of based on permeability with the predictive methodology of coalbed methane recovery efficiency of well spacing |
| CN106337676A (en) * | 2015-07-07 | 2017-01-18 | 中国石油天然气股份有限公司 | Method of fracturing coal-bed gas reservoir |
| WO2017155548A1 (en) * | 2016-03-11 | 2017-09-14 | Halliburton Energy Services, Inc. | Fracture network fluid flow simulation with enhanced fluid-solid interaction force determination |
| CN107288632A (en) * | 2017-08-24 | 2017-10-24 | 河南理工大学 | Coal petrography reservoir mining production water source and pressure drop path simulation apparatus and method |
| CN207080222U (en) * | 2017-08-24 | 2018-03-09 | 河南理工大学 | Coal petrography reservoir mining produces water source and pressure drop path simulation device |
| CN107795315A (en) * | 2017-12-06 | 2018-03-13 | 中煤第建设有限公司 | Determination of coal seam gas pressure device and its method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure |
| CN108316916A (en) * | 2018-01-15 | 2018-07-24 | 河南理工大学 | Mining pressure drop under different conditions of coal bed gas reservoir controls simulation experiment method |
-
2018
- 2018-11-23 CN CN201811402129.XA patent/CN109488284B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2677119A2 (en) * | 2012-06-20 | 2013-12-25 | Rolls-Royce plc | Rotor balancing method |
| CN103015975A (en) * | 2012-12-31 | 2013-04-03 | 河南理工大学 | Gas production rate testing simulation device of coal-bed gas vertical well |
| CN104763621A (en) * | 2015-03-27 | 2015-07-08 | 中联煤层气有限责任公司 | Sucker-rod pump device for coal seam gas exploitation |
| CN104863547A (en) * | 2015-04-13 | 2015-08-26 | 中国海洋石油总公司 | Pressure-propagation-based method for determining discharge and recovery speed at initial stage of coalbed methane exploitation |
| CN106337676A (en) * | 2015-07-07 | 2017-01-18 | 中国石油天然气股份有限公司 | Method of fracturing coal-bed gas reservoir |
| WO2017155548A1 (en) * | 2016-03-11 | 2017-09-14 | Halliburton Energy Services, Inc. | Fracture network fluid flow simulation with enhanced fluid-solid interaction force determination |
| CN106202748A (en) * | 2016-07-14 | 2016-12-07 | 中国海洋石油总公司 | A kind of based on permeability with the predictive methodology of coalbed methane recovery efficiency of well spacing |
| CN107288632A (en) * | 2017-08-24 | 2017-10-24 | 河南理工大学 | Coal petrography reservoir mining production water source and pressure drop path simulation apparatus and method |
| CN207080222U (en) * | 2017-08-24 | 2018-03-09 | 河南理工大学 | Coal petrography reservoir mining produces water source and pressure drop path simulation device |
| CN107795315A (en) * | 2017-12-06 | 2018-03-13 | 中煤第建设有限公司 | Determination of coal seam gas pressure device and its method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure |
| CN108316916A (en) * | 2018-01-15 | 2018-07-24 | 河南理工大学 | Mining pressure drop under different conditions of coal bed gas reservoir controls simulation experiment method |
Non-Patent Citations (4)
| Title |
|---|
| R.K. ANAND: "On dynamics of imploding shock waves in a mixture of gas and dust particles", 《INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS》 * |
| 张洪铭: "川中须家河气藏井下节流井动态分析方法", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
| 王向浩: "潘庄区块煤层气排采过程中水压传播数值模拟", 《河南理工大学学报( 自然科学版)》 * |
| 王晓锋: "沁水盆地南部煤储层水力压裂裂缝发育特征的数值模拟研究", 《现代地质》 * |
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