CN108590630A - A kind of the fracturing fluid leak device and computational methods of multiple-limb seam - Google Patents
A kind of the fracturing fluid leak device and computational methods of multiple-limb seam Download PDFInfo
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- CN108590630A CN108590630A CN201810339936.5A CN201810339936A CN108590630A CN 108590630 A CN108590630 A CN 108590630A CN 201810339936 A CN201810339936 A CN 201810339936A CN 108590630 A CN108590630 A CN 108590630A
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- 239000012530 fluid Substances 0.000 title claims abstract description 53
- 238000000205 computational method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000011521 glass Substances 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 239000004677 Nylon Substances 0.000 claims description 24
- 229920001778 nylon Polymers 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 6
- 238000013508 migration Methods 0.000 claims description 6
- 230000005012 migration Effects 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000005496 tempering Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Geochemistry & Mineralogy (AREA)
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to oil-gas field development technical fields, specifically, it is related to a kind of fracturing fluid leak device of multiple-limb seam, including liquid make-up feeding device, agitating device, leak-off device, liquid withdrawal system, the liquid make-up feeding device includes dispensing box, charging box, electric pump, electronic flowmeter, water pipe, valve, the agitating device includes agitator, stirring motor, blender, the leak-off device includes main seam device, device stitches in branch, screw pump, electronic flowmeter, pressure gauge, it is arranged in series screw pump between the leak-off device and the liquid outlet of the agitator, electronic flowmeter, pressure gauge, the liquid withdrawal system includes valve, drain pipe, settling tank, beneficial effects of the present invention：The gradually dynamic process of leak-off can be intuitively observed when the mixing liquid of fracturing fluid and proppant is pumped to stratum in main seam and branch's seam, and the dynamic that proppant may be implemented lays the fracturing fluid leak device and its computational methods of the multiple-limb seam of process.
Description
Technical field
The present invention relates to the fracturing fluid leak devices and computational methods of a kind of multiple-limb seam, belong to oil-gas field development technology neck
Domain.
Background technology
In hydraulic fracturing process, for generating the oil-gas reservoir of multiple-limb seam there are intrinsic fracture, due to intrinsic fracture
Presence fracturing fluid leak degree can be made to increase considerably, be directly related in this way proppant to depths promote, to allow pressure
It splits liquid and is also affected taking sand, sanding, migration etc., and then influence the success or failure of construction.At present about fracturing fluid leak
Research be mostly to be simulated by theoretical calculation and software, and the result obtained is all ideal, cannot intuitively reflect well
Fluid loss situation in branch's seam.
Conventional fracturing fluid leak simulator can only simulate the leak-off situation in single crack, and experimental result is also more single
One, such as the simulator mentioned in 204086078 U of Chinese utility model patent ublic specification of application CN.Moreover, conventional
Leak-off simulator can not simulate fracturing fluid in practical fracturing process and continue slow dynamic filtration process in multiple-limb seam
And proppant multiple-limb seam in migration, sedimentation, lay situation.Therefore it needs for multiple-limb seam this case, to reality
Proved recipe method is designed, and simulates the fracturing fluid leak situation stitched containing multiple-limb.
Invention content
For the deficiencies in the prior art, the present invention provides one kind can intuitively observing fracturing fluid and proppant
Mixing liquid be pumped to leak-off and proppant slowly lasting in main seam and branch's seam behind stratum migrate, settle in seam,
Lay the fracturing fluid leak device of this dynamic process and the computational methods about filtration rate.
Technical scheme is as follows：
A kind of fracturing fluid leak device of multiple-limb seam, which is characterized in that including liquid make-up feeding device, agitating device, filter
Device, liquid withdrawal system are lost, the liquid make-up feeding device includes dispensing box, charging box, electric pump, electronic flowmeter, water pipe, valve
Door, the water pipe series connection dispensing box, electric pump, electronic flowmeter, the port of the water pipe is equipped with valve, the bottom of the charging box
Equipped with weighing sensor, the weighing sensor lower end be equipped with discharge port, the discharge port be equipped with valve, and discharge port with it is described
The port of water pipe connects, and the liquid make-up feeding device is connect with the upper left side of the agitating device；
The agitating device includes agitator, stirring motor, blender, and the blender includes stirring rod, paddle, institute
It states stirring motor to be arranged in agitator upper end center position, the paddle multistage is distributed in stirring rod, the stirring
The bottom of bucket is equipped with liquid outlet, and the liquid outlet is equipped with valve, and the liquid outlet connects leak-off device；
The leak-off device includes main seam device, branch's seam device, screw pump, electronic flowmeter, pressure gauge, the leak-off
Screw pump, electronic flowmeter, pressure gauge are arranged in series between device and the liquid outlet of the agitator, the main seam device includes
Armorplate glass, transparent nylon plate, cavity, compass screen surface, strainer, steel plate frame, the steel plate frame are set to the main seam device
Surrounding, the cavity include upper cavity, lower chamber, and the inside of the cavity is equipped with compass screen surface, strainer, the cavity and the main seam
The upper and lower surface of device is parallel, and armorplate glass, the armorplate glass are equipped between the steel plate frame and the upper cavity
Inside is equipped with transparent nylon plate, armorplate glass is equipped between the upper cavity and the lower chamber, in the armorplate glass
Side is equipped with transparent nylon plate, armorplate glass is equipped between the steel plate frame and the lower chamber, in the armorplate glass
Side is equipped with transparent nylon plate, and branch's seam device is set to the both sides of the main seam device, and branch seam device and institute
State that main seam apparatus structure is consistent, the rear end of the main seam device is equipped with main seam liquid outlet, and the rear end of branch's seam device is equipped with
Liquid outlet stitches in branch, and the outside of the cavity is equipped with 4 leak-off liquid outlets, and the leak-off liquid outlet is arranged in series electronic flow
Meter, pressure gauge, valve, the leak-off liquid outlet are connect with the liquid withdrawal system；
The liquid withdrawal system includes valve, drain pipe, settling tank, and one end of the drain pipe connects the leak-off and goes out
Liquid mouth, the other end connect the settling tank, are connected between the drain pipe and the main seam liquid outlet equipped with pressure gauge, electron stream
Gauge, valve, the drain pipe are connected between stitching liquid outlet with the branch equipped with pressure gauge, electronic flowmeter, valve.
Further, the angle that the main seam device stitches device with the branch is set as 30 °.
Further, the main seam device is fixed with branch seam device junction using steel bar, and is equipped with fluid sealant
Item.
Further, the junction of the steel plate frame and the armorplate glass, the transparent nylon plate is equipped with sealing
Circle.
Further, the upper cavity is equal to the epicoele at a distance from the steel plate frame of the upper surface of the leak-off device
Body is equal to the lower chamber at a distance from the steel plate frame of the lower surface of the leak-off device at a distance from the lower chamber.
Further, the cavity length is 2.5m, a height of 3cm, width 1cm, and 4 are respectively equipped on the outside of the cavity
A leak-off liquid outlet, and each leak-off liquid outlet connects independent electronic flowmeter, pressure gauge, valve.
Further, the medial surface of the nylon sheet is rough surface, and have between the medial surface of the nylon sheet it is certain between
Gap, for simulating formation fractures.
Further, the length of the steel plate frame of the upper and lower surface of the main seam device is 2.5m, a height of 35cm, and thickness is
1cm, size corresponds to the armorplate glass therewith, and effective simulation fracture face length is 2.5m, a height of 30cm.
Further, the steel plate frame length of the upper and lower surface of branch seam device is 1.5m, a height of 35cm, and thickness is
1cm, size corresponds to the armorplate glass therewith, and it is 1.5m, a height of 30cm effectively to simulate branch's seam face length.
Further, the computational methods of the fracturing fluid leak device of multiple-limb seam, which is characterized in that steps are as follows：
S1, Preparatory work of experiment check the integrity of each component function；
S2, it is calculated real according to same ratio progress laboratory preparation according to site operation discharge capacity, sand ratio, support agent parameter
Test required discharge capacity, fracturing fluid volume, proppant dosage；
S3, the fracturing fluid configured is pumped into agitator from dispensing box, proppant enters agitator from charging box, and unlatching is stirred
Motor is mixed to be sufficiently stirred；
Liquid outlet valve stitches in S4, the bottom valve for opening agitator and main seam liquid outlet valve, branch, starts screw rod
Pump, the fracturing fluid mixed is pumped into main seam device, opens the valve at the leak-off liquid outlet of the cavity of leak-off device, mixing
Liquid flows into settling tank by drain pipe；
S5 closes screw pump after main seam is stablized, and shoots proppant migration by video camera, lays process and seam internal pressure
Split liquid leak-off process；Start electric pump, be pumped into clear water from dispensing box and device is cleaned, records simulated time and each crack filtrate
Area's meter readings, are calculate by the following formula filtration rate：
In formula：V- filtrate volumes, m3；
T- leak-off times, min；
The flat-shaped housing depth of ω-stainless steel, m；
The flat-shaped cavity length of l- stainless steels, m；
ν-filtration rate, m3/min。
Beneficial effects of the present invention are：
1, the present invention is stitched by the way that armorplate glass, cavity, transparent nylon plate is arranged come the main seam of simulated formation, branch, can be with
It intuitively observes, during oil-gas field fracturing, in main seam and branch when the mixing liquid of fracturing fluid and proppant is pumped to stratum
The dynamic process of gradual leak-off in seam, and the dynamic that proppant may be implemented lays process.
2, leak-off device of the present invention is front and back installs electronic flowmeter, and steel plate frame connects with armorplate glass, transparent nylon plate
Connect place's setting sealing joint strip so that good airproof performance, measurement data is more accurate, and result of calculation is more close to stratum reality, for pressure
It splits parameter optimization and foundation is provided.
3, cavity of the invention is equipped with compass screen surface and strainer, can be effectively isolated proppant, only allow fluid from, fully anti-
Reflect leak-off process slowly lasting in fracturing process.
4, the present invention in leak-off device import and export is mounted on flowmeter and pressure gauge, can be surveyed frictional resistance in fracture
It is fixed.
5, the present invention fills easy to operate, has large scale, visual feature, can intuitively observation experiment process, point
Experimental phenomena is analysed, provides foundation for fracturing parameter optimization, and computational methods principle is reliable, modelling is simple, convenient for promoting.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 structure charts provided by the invention；
The sectional view of Fig. 2 main seam devices provided by the invention, branch's seam device；
Structure drawing of device stitches in Fig. 3 main seam devices provided by the invention, branch.
As shown in the figure：
1, dispensing box, 2, electric pump, 3, water pipe, 4, charging box, 5, weighing sensor, 6, stirring motor, 7, agitator, 8, stir
Mix stick, 9, paddle, 10, screw pump, 11, main seam device, 12, branch stitch device, 13, armorplate glass, 14, transparent nylon
Plate, 15, cavity, 16, steel plate frame, 17, sealing ring, 18, drain pipe, 19, settling tank, 20-27, valve, 28-31, electron stream
Gauge, 32-34, pressure gauge；
Device stitches in 12-1, A branch, and device stitches in 12-2, B branch, and device stitches in 12-3, C branch；
15-1, compass screen surface, 15-2, strainer, 15-3, leak-off liquid outlet.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, a kind of fracturing fluid leak device of multiple-limb seam, including liquid make-up feeding device, agitating device, leak-off
Device, liquid withdrawal system, the liquid make-up feeding device include dispensing box 1, charging box 4, electric pump 2, electronic flowmeter 28, water pipe
3, valve, the water pipe series connection dispensing box 1, electric pump 2, electronic flowmeter 28, the port of the water pipe 3 is equipped with valve 20, described
The bottom of charging box 4 is equipped with weighing sensor 5, and 5 lower end of the weighing sensor is equipped with discharge port, and the discharge port is equipped with valve
21, and discharge port is connect with the port of the water pipe 3, the liquid make-up feeding device is connect with the upper left side of the agitating device；
The agitating device includes agitator 7, stirring motor 6, blender, and the blender includes stirring rod 8, paddle
9, the stirring motor 6 is arranged in the upper end center position of the agitator 7, and 9 multistage of the paddle is distributed in stirring rod 8
On, the bottom of the agitator 7 is equipped with liquid outlet, and the liquid outlet is equipped with valve 22, and the liquid outlet connects leak-off device；
As shown in figures 2-3, the leak-off device includes main seam device 11, branch's seam device 12, screw pump 10, electron stream
Gauge, pressure gauge are arranged in series screw pump 10, electronic flowmeter between the leak-off device and the liquid outlet of the agitator 7
29, pressure gauge 32, the main seam device 11 include armorplate glass 13, transparent nylon plate 14, cavity 15, compass screen surface 15-1, strainer
15-2, steel plate frame 16, the steel plate frame 16 are set to main 11 surrounding of seam device, the cavity 15 include upper cavity,
Lower chamber, the inside of the cavity 15 are equipped with compass screen surface 15-1, strainer 15-2, and 15 length of the cavity is 2.5m, a height of 3cm, wide
Degree is 1cm, and the cavity 15 is parallel with the main seam upper and lower surface of device 11, the steel plate frame 16 and the upper cavity it
Between be equipped with armorplate glass 13, the inside of the armorplate glass 13 is equipped with transparent nylon plate 14, the medial surface of the nylon sheet 14
For rough surface, and there is certain interval between the medial surface of the nylon sheet 14, for simulating formation fractures, the upper cavity and institute
It states and is equipped with armorplate glass 13 between lower chamber, 13 inside of the armorplate glass is equipped with transparent nylon plate 14, the steel plate side
Frame 16 and the armorplate glass 13, the transparent nylon plate 14 junction be equipped with sealing ring 17, the steel plate frame 16 with
Armorplate glass 13 is equipped between the lower chamber, 13 inside of the armorplate glass is equipped with transparent nylon plate 14, the epicoele
Body is equal to the upper cavity at a distance from the lower chamber etc. at a distance from the steel plate frame 16 of the upper surface of the leak-off device
At a distance from the steel plate frame 16 of the lower chamber with the lower surface of the leak-off device, branch's seam device 12 is set to institute
The both sides of main seam device 11 are stated, and branch seam device 12 is consistent with main seam 11 structures of device, the main seam device 11
The angle that device 12 is stitched with the branch is set as 30 °, and the main seam device 11 is used with 12 junction of branch seam device
Steel bar is fixed, and is equipped with sealing joint strip, and the rear end of the main seam device 11 is equipped with main seam liquid outlet, branch's seam device 12
Rear end is equipped with branch and stitches liquid outlet, and the outside of the cavity 15 is equipped with 4 leak-off liquid outlets 15-3, the leak-off liquid outlet 15-3
It is arranged in series electronic flowmeter 30, pressure gauge 33, valve 23, the leak-off liquid outlet 15-3 connects with the liquid withdrawal system
It connects, the length of the steel plate frame 16 of the upper and lower surface of the main seam device 11 is 2.5m, a height of 35cm, thickness 1cm, the steel
Changing glass plate 13, size corresponds to therewith, and effective simulation fracture face length is 2.5m, a height of 30cm, and the upper of device 12 is stitched by the branch
16 length of steel plate frame of lower surface is 1.5m, a height of 35cm, thickness 1cm, and size corresponds to the armorplate glass 12 therewith,
Effectively simulation branch seam face length is 1.5m, a height of 30cm；
The liquid withdrawal system includes valve, drain pipe 18, settling tank 19, described in one end connection of the drain pipe 18
Leak-off liquid outlet 15-3, the other end connect the settling tank 19, and string is equipped between the drain pipe 18 and the main seam liquid outlet
For connection equipped with pressure gauge, electronic flowmeter, valve, the drain pipe 18 is connected between stitching liquid outlet with the branch is equipped with pressure gauge
34, electronic flowmeter 31, valve 25.
A kind of computational methods of the fracturing fluid leak device of multiple-limb seam, steps are as follows：
S1, Preparatory work of experiment check the integrity of each component function；
S2, it is calculated real according to same ratio progress laboratory preparation according to site operation discharge capacity, sand ratio, support agent parameter
Test required discharge capacity, fracturing fluid volume, proppant dosage；
S3, the fracturing fluid configured is pumped into agitator 7 from dispensing box 1, proppant enters agitator 7 from charging box 4, opens
Stirring motor 6 is opened to be sufficiently stirred；
Valve at liquid outlet stitches in valve 24, branch at S4, the bottom valve 22 for opening agitator 7 and main seam liquid outlet
25-27 starts screw pump 10, the fracturing fluid mixed is pumped into main seam device 11, opens the filter of the cavity 15 of leak-off device
The valve 23 of 15-3 at liquid outlet is lost, mixing liquid flows into settling tank 19 by drain pipe 18；
S5 closes screw pump 10 after main seam is stablized, and shoots proppant migration by video camera, lays in process and seam
Fracturing fluid leak process；Start electric pump 2, be pumped into clear water from dispensing box 1 and device is cleaned, records simulated time and each crack
Filtrate area meter readings, are calculate by the following formula filtration rate：
In formula：V- filtrate volumes, m3；T- leak-off times, min；The flat-shaped housing depth of ω-stainless steel, m；L- stainless steels are flat
Shape cavity length, m；ν-filtration rate, m3/min。
Embodiment：
(1) Preparatory work of experiment checks that the integrity of each component function, valve are closed.
(2) according to site operation discharge capacity, sand ratio, support agent parameter, laboratory preparation is carried out according to same ratio, experiment is false
If：In pressing crack construction process, using riverfrac treatment liquid, 30/50 mesh proppant, apparent density 1.76g/cm3, pump note row are used
10m3/min is measured, simulation sand is formed by man-made fracture and stitches high 50m, slit width 8mm than 6%.
Binding experiment parameter needs 10min to calculate according to whaleback stabilization：
Mixing flow velocity is in true stratum seam：
It simulates and mixes flow quantity in main seam：ν '=25m/min × 0.35m × 0.008m=0.07m3/min
0.07m is used during the experiment3The pump note discharge capacity of/min is pumped into sand than the mixed liquor for 6%,
10min simulation seam mixed liquor total flows：
Fracturing fluid base fluid dosage：3.3m3× 0.94=3.10m3
Proppant dosage：3m3× 0.06=0.20m3
0.20m3×1.76×103Kg/m3=0.352Kg
It is 0.07m to calculate discharge capacity needed for gained experiment3/ min, fracturing fluid base fluid volume are 3.10m3, proppant dosage be
0.20m3, fracturing fluid is riverfrac treatment liquid.
(3) valve 20, valve 21 are opened, the fracturing fluid configured is pumped into agitator 7 from dispensing box 1, dosage is by electronics
Flowmeter 24 controls, and proppant enters agitator 7 from charging box 4, and dosage controls by weighing sensor 5, open stirring motor 6 into
Row is sufficiently stirred.
(4) valve 22, valve 23, valve 24, valve 25, valve 26, valve 27 and main seam device 11 and branch are opened
The leak-off liquid outlet 15-3 valves 23 of the cavity 15 of device 12 are stitched, starts screw pump 10, the fracturing fluid mixed is pumped into main seam
In, mixing liquid flows into settling tank 19 by drain pipe 18；Unit simulation fracturing fluid continues slow leak-off process in the earth formation
And dynamic migration, sanding process
(5) after main seam is stablized, screw pump is closed, stopping, which is pumped into, takes sand fracturing fluid, and proppant fortune is shot by video camera
It moves, lay fracturing fluid leak process in process and seam, the main seam leak-off total amount of parallel-plate is 2.25 × 10 when recording 10min-4m3,
It is 6.75 × 10 that A leak-off total amounts are stitched by parallel-plate branch-5m3, it is 6 × 10 that C leak-off total amounts are stitched by parallel-plate branch-5m3, parallel-plate branch
It is 9 × 10 to stitch B leak-off total amounts-5m3, start electric pump, be pumped into clear water from dispensing box and device is cleaned；
The above experimental data is substituted into formula (1), obtains following result：
The main seam filtration rate of parallel-plate：
A filtration rates stitch in parallel-plate branch：
B filtration rates stitch in parallel-plate branch：
C filtration rates stitch in parallel-plate branch：
In above-mentioned experimentation,
A kind of fracturing fluid leak device of multiple-limb seam provided by the invention and having the beneficial effect that for computational methods：It can be straight
See when the mixing liquid of ground observation fracturing fluid and proppant is pumped to stratum in main seam and branch's seam the gradually dynamic mistake of leak-off
Journey, and the dynamic that proppant may be implemented lays process, and the filtration rate being calculated provides foundation for fracturing parameter optimization.
The above is not intended to limit the present invention in any form, although the present invention is disclosed such as by embodiment
On, however, it is not intended to limit the invention, any person skilled in the art, is not departing from technical solution of the present invention range
It is interior, when the technology contents using the disclosure above make a little change or are modified to the equivalent embodiments of equivalent variations, as long as being
Without departing from the content of technical solution of the present invention, simply repaiied to any made by above example according to the technical essence of the invention
Change, equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of fracturing fluid leak device of multiple-limb seam, which is characterized in that including liquid make-up feeding device, agitating device, leak-off
Device, liquid withdrawal system, the liquid make-up feeding device include dispensing box, charging box, electric pump, electronic flowmeter, water pipe, valve
Door, the water pipe series connection dispensing box, electric pump, electronic flowmeter, the port of the water pipe is equipped with valve, the bottom of the charging box
Equipped with weighing sensor, the weighing sensor lower end be equipped with discharge port, the discharge port be equipped with valve, and discharge port with it is described
The port of water pipe connects, and the liquid make-up feeding device is connect with the upper left side of the agitating device；
The agitating device includes agitator, stirring motor, blender, and the stirring motor is arranged in the agitator upper end
Heart position, the blender include stirring rod, paddle, and the paddle multistage is distributed in stirring rod, the agitator
Bottom is equipped with liquid outlet, and the liquid outlet is equipped with valve, and the liquid outlet connects leak-off device；
The leak-off device includes main seam device, branch's seam device, screw pump, electronic flowmeter, pressure gauge, the leak-off device
Screw pump, electronic flowmeter, pressure gauge are arranged in series between the liquid outlet of the agitator, the main seam device includes tempering
Glass plate, transparent nylon plate, cavity, compass screen surface, strainer, steel plate frame, the steel plate frame are set to the main seam device surrounding,
The cavity includes upper cavity, lower chamber, and the inside of the cavity is equipped with compass screen surface, strainer, the cavity and the main seam device
Upper and lower surface it is parallel, armorplate glass is equipped between the steel plate frame and the upper cavity, on the inside of the armorplate glass
Equipped with transparent nylon plate, it is equipped with armorplate glass between the upper cavity and the lower chamber, is set on the inside of the armorplate glass
There is transparent nylon plate, armorplate glass is equipped between the steel plate frame and the lower chamber, is set on the inside of the armorplate glass
There are transparent nylon plate, branch's seam device to be set to the both sides of the main seam device, and branch seam device and the master
Seam apparatus structure is consistent, and the rear end of the main seam device is equipped with main seam liquid outlet, and the rear end of branch's seam device is equipped with branch
Liquid outlet is stitched, the outside of the cavity is equipped with 4 leak-off liquid outlets, and the leak-off liquid outlet is arranged in series electronic flowmeter, pressure
Power table, valve, the leak-off liquid outlet are connect with the liquid withdrawal system；
The liquid withdrawal system includes valve, drain pipe, settling tank, and one end of the drain pipe connects the leak-off and goes out liquid
Mouthful, the other end connects the settling tank, is connected between the drain pipe and the main seam liquid outlet equipped with pressure gauge, electronic flow
Meter, valve, the drain pipe are connected between stitching liquid outlet with the branch equipped with pressure gauge, electronic flowmeter, valve.
2. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the main seam device
The angle that device is stitched with the branch is set as 30 °.
3. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the main seam device
It is fixed using steel bar with branch seam device junction, and is equipped with sealing joint strip.
4. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the steel plate frame
It is equipped with sealing ring with the junction of the armorplate glass, the transparent nylon plate.
5. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the upper cavity with
The distance of the steel plate frame of the upper surface of the leak-off device is equal to the upper cavity at a distance from the lower chamber equal to described
Lower chamber is at a distance from the steel plate frame of the lower surface of the leak-off device.
6. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the cavity length
For 2.5m, a height of 3cm, width 1cm, 4 leak-off liquid outlets, and each leak-off liquid outlet are respectively equipped on the outside of the cavity
Connect independent electronic flowmeter, pressure gauge, valve.
7. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the nylon sheet
Medial surface is rough surface, and has certain interval between the medial surface of the nylon sheet, for simulating formation fractures.
8. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that the main seam device
The length of steel plate frame of upper and lower surface be 2.5m, a height of 35cm, thickness 1cm, armorplate glass size pair therewith
It answers, effective simulation fracture face length is 2.5m, a height of 30cm.
9. a kind of fracturing fluid leak device of multiple-limb seam according to claim 1, which is characterized in that branch's seam dress
The steel plate frame length for the upper and lower surface set is 1.5m, a height of 35cm, thickness 1cm, armorplate glass size pair therewith
It answers, it is 1.5m, a height of 30cm effectively to simulate branch's seam face length.
10. a kind of computational methods of the fracturing fluid leak device of multiple-limb seam as described in any one of claim 1-9,
It is characterized in that, steps are as follows：
S1, Preparatory work of experiment check the integrity of each component function；
S2, according to site operation discharge capacity, sand ratio, support agent parameter, according to same ratio carry out laboratory preparation, experiment with computing institute
Need discharge capacity, fracturing fluid volume, proppant dosage；
S3, the fracturing fluid configured is pumped into agitator from dispensing box, proppant enters agitator from charging box, opens stirring electricity
Machine is sufficiently stirred；
Liquid outlet valve stitches in S4, the bottom valve for opening agitator and main seam liquid outlet valve, branch, starts screw pump, will
The fracturing fluid mixed is pumped into main seam device, opens the valve at the leak-off liquid outlet of the cavity of leak-off device, mixing liquid
Settling tank is flowed by drain pipe；
S5 closes screw pump after main seam is stablized, and shoots proppant migration by video camera, lays fracturing fluid in process and seam
Leak-off process；Start electric pump, be pumped into clear water from dispensing box and device is cleaned, records simulated time and each crack filtrate area stream
Gauge is read, and is calculate by the following formula filtration rate：
In formula：V- filtrate volumes, m3；T- leak-off times, min；The flat-shaped housing depth of ω-stainless steel, m；The flat-shaped cavity of l- stainless steels
Length, m；ν-filtration rate, m3/min。
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