CN107939367A - A kind of pressure break water horse power determines method - Google Patents
A kind of pressure break water horse power determines method Download PDFInfo
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- CN107939367A CN107939367A CN201711418398.0A CN201711418398A CN107939367A CN 107939367 A CN107939367 A CN 107939367A CN 201711418398 A CN201711418398 A CN 201711418398A CN 107939367 A CN107939367 A CN 107939367A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000012530 fluid Substances 0.000 claims abstract description 55
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 45
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims abstract description 23
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000013019 agitation Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 210000005239 tubule Anatomy 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 238000007405 data analysis Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
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- Databases & Information Systems (AREA)
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- General Engineering & Computer Science (AREA)
- Evolutionary Biology (AREA)
- Probability & Statistics with Applications (AREA)
- Fluid Mechanics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention provides a kind of pressure break water horse power to determine method, and by improving the computational accuracy of fracturing fluid frictional resistance, it is accurate that frictional resistance calculates, and obtained operation pressure is accurate, so that pressure break water horse power is also more accurate.The consumption of materials is reduced, it is cost-effective.Using experiment and the theoretical method being combined, by indoor tubule column internal diameter guanidine glue friction resistance test, the relational expression of flow velocity and drop resistance ratio is obtained using approximating method, the relational expression recycled calculates the frictional resistance of guanidine gum fracturing fluid under different tubing string internal diameters and flow velocity.The problem of asking for difficulty this method avoid empirical equation coefficient, makes the frictional resistance for asking for simpler and accurate, to be calculated guanidine gum fracturing fluid of drop resistance ratio and actual frictional resistance closer.
Description
Technical field
The invention belongs to oil exploitation fracturing technique field, and in particular to a kind of pressure break water horse power determines method.
Background technology
Determine that fracturing fluid frictional resistance becomes an important process in fracturing process.Frictional resistance size can directly affect frac water horse
The numerical value of well head pressure in the definite of power, fracturing process.
At present, it is main both at home and abroad that fracturing fluid frictional resistance is calculated than method and coefficient of friction resistance method using drop resistance.Using empirical equation meter
When calculation drop resistance is compared, it is thus necessary to determine that the coefficient of each parameter in empirical equation, and the coefficient is related with liquid property, it is difficult to accurately ask
Take, reality is not met using the empirical value of forefathers again, result of calculation is larger with actual deviation, influences subsequent data analysis.Actual measurement
The frictional resistance of every kind of fracturing fluid is not only of high cost, and with duration, it is unrealistic.
The content of the invention
The purpose of the present invention is overcoming prior art fracturing fluid frictional resistance to be difficult to ask for using empirical equation coefficient, result of calculation
It is larger with actual deviation, water horse power is fixed really and rings big technical problem.
For this reason, the present invention provides a kind of pressure break water horse power to determine method, comprise the following steps：
Step 1) calculates the frictional resistance of fracturing fluid, and process is as follows：
(1) accuracy of indoor friction resistance test device to test result is verified, error is less than the indoor friction resistance test of 10% explanation
Device measure is reliable；
(2) configure fracturing fluid to be determined, carried out respectively using indoor friction resistance test device in the case where needing test temperature to
Fracturing fluid frictional resistance measure and clear water frictional resistance measure in few three different tubing string internal diameters, obtain fracturing fluid frictional resistance measured value Δ pg′
With clear water frictional resistance measured value Δ pw', utilize the corresponding flow of each frictional resistance measured value of the cmf record of indoor friction resistance test device
Q；
(3) the clear water frictional resistance measured value Δ p of the corresponding each same displacement of each tubing string internal diameter is respectively obtainedw' and fracturing fluid
Frictional resistance measured value Δ pg' corresponding drop is hindered than measured value σ ',
(4) corresponding fracturing fluid mean flow rate u under each tubing string internal diameter different flow is calculated；
(5) each tubing string internal diameter is drawn in same rectangular co-ordinateWithScatter diagram, to scatterplot carry out
Fitting is asked to obtainWherein, σ is that drop is hindered than match value, and A is intercept, and B is slope；
(6) fracturing fluid drop resistance is obtained than relational expression σ=10 with flow velocity by step (5)-AuB；
(7) Value of Friction Loss Δ p of the fracturing fluid in actual oil pipe is calculatedg=σ Δs pw, wherein, Δ pwIt is theoretical for clear water frictional resistance
Value；
Step 2) calculates pressure break water horse power HHP=operational discharge capacities × operation pressure × 22.34, wherein, operation pressure=well
Bottom pressure+fracturing fluid Value of Friction Loss Δ pg- head of liquid；Pressure unit is MPa；Operational discharge capacity unit is m3/min。
The accuracy of indoor friction resistance test device to test result is verified by the following method：With indoor friction resistance test device,
Measure the clear water frictional resistance measured value Δ p under more different tubing string internal diameter different flowsw', with clear water frictional resistance theoretical value Δ pwCarry out
Compare, it is reliable that error is less than the 10% interior friction resistance test device measure.
The interior friction resistance test device includes Agitation Tank, plunger pump, tubing string and the flowmeter being sequentially communicated, the tubing string
On be parallel with pressure sensor, the pressure sensor and flowmeter are connected with computer.
The mean flow rate u=21231.412QD of the fracturing fluid-2, in formula, u is mean flow rate, unit m/s；D is pipe
Column internal diameter, unit mm；Q is flow, unit m3/min。
The clear water frictional resistance theoretical value Δ pw=1.3866 × 106D-4.8Q1.8L, in formula, Δ pwFor clear water frictional resistance theoretical value,
Unit is MPa；D is tubing string internal diameter, unit mm；Q is flow, unit m3/min；L is pipe range, unit m.
Described at least three different tubing string internal diameters are respectively 12.7mm, 19.1mm and 25.4mm.
The fracturing fluid frictional resistance measured value Δ pg' and clear water frictional resistance measured value Δ pw' under same displacement and tubing string internal diameter
Obtain.
The fracturing fluid is the guanidine gum fracturing fluid that mass concentration is 0.08%-0.4%.
The beneficial effects of the invention are as follows：
This pressure break water horse power provided by the invention determines method, by improving the computational accuracy of fracturing fluid frictional resistance, frictional resistance
It is accurate to calculate, and obtained operation pressure is accurate, so that pressure break water horse power is also more accurate.The consumption of materials is reduced, it is cost-effective.
Using experiment and the theoretical method being combined, by indoor tubule column internal diameter guanidine glue friction resistance test, using fitting
Method obtains the relational expression of flow velocity and drop resistance ratio, and the relational expression recycled calculates guanidine glue laminated under different tubing string internal diameters and flow velocity
Split the frictional resistance of liquid.The problem of asking for difficulty this method avoid empirical equation coefficient, make drop resistance ratio ask for it is simpler and accurate
Really, the frictional resistance for the guanidine gum fracturing fluid being calculated and actual frictional resistance are closer.
It is described in further details below in conjunction with attached drawing.
Brief description of the drawings
Fig. 1 calculates the frictional resistance flow chart of fracturing fluid；
Fig. 2 is indoor friction resistance test schematic device；
Fig. 3 is the relation curve of clear water flow and frictional resistance under 12.7mm tubing string internal diameters；
Fig. 4 is the relation curve of clear water flow and frictional resistance under 19.1mm and 25.4mm tubing string internal diameters；
Fig. 5 is the relation curve of 0.08% guanidine matrix liquid flow velocity and drop resistance ratio in different-diameter pipeline.
Embodiment
Embodiment 1：
In order to overcome prior art fracturing fluid frictional resistance to be difficult to ask for using empirical equation coefficient, result of calculation and actual deviation
It is larger, water horse power is fixed really and rings big technical problem.
Present embodiments provide a kind of pressure break water horse power and determine method, comprise the following steps：
Step 1) calculates the frictional resistance of fracturing fluid, and process is following (see Fig. 1)：
(1) accuracy of indoor friction resistance test device to test result is verified, error is less than the indoor friction resistance test of 10% explanation
Device measure is reliable；
(2) configure fracturing fluid to be determined, carried out respectively using indoor friction resistance test device in the case where needing test temperature to
Fracturing fluid frictional resistance measure and clear water frictional resistance measure in few three different tubing string internal diameters, obtain fracturing fluid frictional resistance measured value Δ pg′
With clear water frictional resistance measured value Δ pw', utilize the corresponding flow of each frictional resistance measured value of the cmf record of indoor friction resistance test device
Q；
(3) the clear water frictional resistance measured value Δ p of the corresponding each same displacement of each tubing string internal diameter is respectively obtainedw' and fracturing fluid
Frictional resistance measured value Δ pg' corresponding drop is hindered than measured value σ ',
(4) corresponding fracturing fluid mean flow rate u under each tubing string internal diameter different flow is calculated；
(5) each tubing string internal diameter is drawn in same rectangular co-ordinateWithScatter diagram, to scatterplot carry out
Fitting is asked to obtainWherein, σ is that drop is hindered than match value, and A is intercept, and B is slope；
(6) fracturing fluid drop resistance is obtained than relational expression σ=10 with flow velocity by step (5)-AuB；
(7) Value of Friction Loss Δ p of the fracturing fluid in actual oil pipe is calculatedg=σ Δs pw, wherein, Δ pwIt is theoretical for clear water frictional resistance
Value；
Step 2) calculates pressure break water horse power HHP=operational discharge capacities × operation pressure × 22.34, wherein, operation pressure=well
Bottom pressure+fracturing fluid Value of Friction Loss Δ pg- head of liquid；Pressure unit is MPa；Operational discharge capacity unit is m3/min。
Computational accuracy of the invention by improving fracturing fluid frictional resistance, more accurately determines pressure break water horse power, meets that pressure break is applied
Work and the requirement of pressure break data analysis.
Using experiment and the theoretical method being combined, by indoor tubule column internal diameter guanidine glue friction resistance test, using fitting
Method obtains the relational expression of flow velocity and drop resistance ratio, and the relational expression recycled calculates guanidine glue laminated under different tubing string internal diameters and flow velocity
Split the frictional resistance of liquid.The problem of asking for difficulty this method avoid empirical equation coefficient, make drop resistance ratio ask for it is simpler and accurate
Really, the frictional resistance for the guanidine gum fracturing fluid being calculated and actual frictional resistance are closer.
Embodiment 2：
On the basis of embodiment 1, present embodiments provide a kind of pressure break water horse power and determine method, test by the following method
The accuracy of the indoor friction resistance test device to test result of card：With indoor friction resistance test device, measure in more different tubing string internal diameters
Clear water frictional resistance measured value Δ p under different floww', with clear water frictional resistance theoretical value Δ pwIt is compared, error is less than 10% should
Indoor friction resistance test device measure is reliable.
Wherein, the indoor friction resistance test device includes Agitation Tank, plunger pump, tubing string and the flowmeter being sequentially communicated, institute
State and pressure sensor is parallel with tubing string, the pressure sensor and flowmeter are connected with computer.As shown in Fig. 2, flow
The outlet of meter is connected with Agitation Tank, and fracturing fluid can recycle.Pressure sensor measures frictional resistance, computer record frictional resistance and stream
Amount.
Clear water frictional resistance theoretical value Δ pw=1.3866 × 106D-4.8Q1.8L, in formula, Δ pwFor clear water frictional resistance theoretical value, unit
For MPa；D is tubing string internal diameter, unit mm；Q is flow, unit m3/min；L is pipe range, unit m.
The mean flow rate u=21231.412QD of fracturing fluid-2, in formula, u is mean flow rate, unit m/s；D is in tubing string
Footpath, unit mm；Q is flow, unit m3/min。
Embodiment 3：
On the basis of previous embodiment, use present invention determine that use mass concentration for 0.08% guanidine gum fracturing fluid into
Pressure break water horse power during row pressure break.
Step 1) calculates the frictional resistance for the guanidine gum fracturing fluid that mass concentration is 0.08%：
(1) using the indoor friction resistance test device shown in Fig. 2, temperature rises to the temperature for needing to test, and measures clear water first
Frictional resistance under three different tubing string internal diameter D different flows Q, and contrasted with theoretical formula method result, in rectangular co-ordinate
It is lower to draw clear water flow and the curve of frictional resistance measured value and frictional resistance theoretical value, to verify whether the result of equipment test is accurate, by mistake
It is reliable that difference is less than the 10% interior friction resistance test device measure；It is different tubing string internal diameter (12.7mm, 19.1mm in Fig. 3, Fig. 4
And 25.4mm) under, the comparison figure of clear water frictional resistance theoretical value and actual measured value, clear water frictional resistance theoretical value Δ pwCalculation formula Δ pw
=1.3866 × 106D-4.8Q1.8L, wherein, D is tubing string internal diameter, mm；Q is flow, m3/min；L is pipe range, m；In the present embodiment
Pipe range 3m.
(2) configuration quality fraction is 0.08% guanidine matrix liquid in Agitation Tank, after guanidine glue complete swelling, is rubbed using interior
Frictional resistance of the testing equipment test guanidine matrix liquid with different displacements by three pipe with small pipe diameter (12.7,19.1 and 25.4mm) is hindered, respectively
Record corresponding flow and frictional resistance.
(3) 0.08% guanidine matrix liquid of different displacements drop under different tube diameters is calculated to hinder than σ ',
(4) the mean flow rate u of 0.08% guanidine matrix liquid is calculated by the following formula：U=21231.42QD-2。
(5) 0.08% guanidine gum fracturing fluid under three calibers is drawn in rectangular co-ordinateWithScatter diagram, such as
Shown in Fig. 5.Scatterplot is fitted and tries to achieve intercept A and slope B, obtains following relational expression：
Wherein, A=-0.4788 and B=-0.0288, different according to the guanidine gum fracturing fluid of test, A and B values also change therewith.
(6) relational expression tried to achieve according to step 5 obtains the drop resistance of 0.08% guanidine matrix liquid than the relational expression with flow velocity：σ=
3.0116u-0.0288。
(7) according to the formula of step (1), step (4) and step (6), 0.08% guanidine matrix liquid is obtained in actual oil pipe
Frictional resistance Δ pgCalculation formula：
Δp0.08%=3.1343 × 1012Q1.7712D-4.7424L。
Step 2) calculates pressure break water horse power HHP=operational discharge capacities × operation pressure × 22.34, wherein, operation pressure=well
Bottom pressure+fracturing fluid Value of Friction Loss Δ pg- head of liquid；Pressure unit is MPa；Operational discharge capacity unit is m3/min。
Wherein, bottom pressure can be measured by pressure gauge, and head of liquid P=0.00981 ρ h, P are head of liquid, unit
For MPa；ρ is fluid density, unit g/cm3；Unit h is well depth, unit m.
By the method increase the computational accuracy of fracturing fluid frictional resistance, it is accurate that frictional resistance calculates, and obtained operation pressure is accurate,
So as to which total water horse power is also more accurate.The consumption of materials is reduced, it is cost-effective.
The foregoing examples are only illustrative of the present invention, does not form the limitation to protection scope of the present invention, all
It is to be belonged to the same or similar design of the present invention within protection scope of the present invention.
Claims (8)
1. a kind of pressure break water horse power determines method, it is characterised in that comprises the following steps：
Step 1) calculates the frictional resistance of fracturing fluid, and process is as follows：
(1) accuracy of indoor friction resistance test device to test result is verified, error is less than 10% and illustrates interior friction resistance test dress
It is reliable to put measure；
(2) fracturing fluid to be determined is configured, at least three are carried out respectively in the case where needing test temperature using indoor friction resistance test device
Fracturing fluid frictional resistance measure and clear water frictional resistance measure in a difference tubing string internal diameter, obtain fracturing fluid frictional resistance measured value Δ pg' and it is clear
Water frictional resistance measured value Δ pw', utilize the corresponding flow Q of each frictional resistance measured value of the cmf record of indoor friction resistance test device；
(3) the clear water frictional resistance measured value Δ p of the corresponding each same displacement of each tubing string internal diameter is respectively obtainedw' surveyed with fracturing fluid frictional resistance
Definite value Δ pg' corresponding drop is hindered than measured value σ ',
(4) corresponding fracturing fluid mean flow rate u under each tubing string internal diameter different flow is calculated；
(5) each tubing string internal diameter is drawn in same rectangular co-ordinateWithScatter diagram, scatterplot is fitted
Ask to obtainWherein, σ is that drop is hindered than match value, and A is intercept, and B is slope；
(6) fracturing fluid drop resistance is obtained than relational expression σ=10 with flow velocity by step (5)-AuB；
(7) Value of Friction Loss Δ p of the fracturing fluid in actual oil pipe is calculatedg=σ Δs pw, wherein, Δ pwFor clear water frictional resistance theoretical value；
Step 2) calculates pressure break water horse power HHP=operational discharge capacities × operation pressure × 22.34, wherein, operation pressure=shaft bottom pressure
Power+fracturing fluid Value of Friction Loss Δ pg- head of liquid.
2. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：Room is verified by the following method
The accuracy of interior friction resistance test device to test result：With indoor friction resistance test device, measure different in more different tubing string internal diameters
Clear water frictional resistance measured value Δ p under floww', with clear water frictional resistance theoretical value Δ pwIt is compared, error is less than 10% interior
Friction resistance test device measure is reliable.
3. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：The interior friction resistance test dress
Agitation Tank, plunger pump, tubing string and flowmeter including being sequentially communicated are put, pressure sensor, the pressure are parallel with the tubing string
Force snesor and flowmeter are connected with computer.
4. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：The mean flow of the fracturing fluid
Fast u=21231.412QD-2, in formula, u is mean flow rate, unit m/s；D is tubing string internal diameter, unit mm；Q is flow, single
Position is m3/min。
5. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：The clear water frictional resistance theoretical value
Δpw=1.3866 × 106D-4.8Q1.8L, in formula, Δ pwFor clear water frictional resistance theoretical value, unit MPa；D is tubing string internal diameter, unit
For mm；Q is flow, unit m3/min；L is pipe range, unit m.
6. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：Described at least three different pipes
Column internal diameter is respectively 12.7mm, 19.1mm and 25.4mm.
7. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：The fracturing fluid frictional resistance measure
It is worth Δ pg' and clear water frictional resistance measured value Δ pw' obtained under same displacement and tubing string internal diameter.
8. a kind of pressure break water horse power according to claim 1 determines method, it is characterised in that：The fracturing fluid is dense for quality
Spend the guanidine gum fracturing fluid for 0.08%-0.4%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112069746A (en) * | 2020-09-14 | 2020-12-11 | 陕西延长石油（集团）有限责任公司 | Fracturing string friction resistance testing method based on virtual parallel equal differential pressure method |
| CN116429640A (en) * | 2023-05-31 | 2023-07-14 | 西安石油大学 | Method for testing resistance-reducing performance of small molecule recyclable self-cleaning fracturing fluid system |
| CN117347578A (en) * | 2023-10-10 | 2024-01-05 | 重庆地质矿产研究院 | Rapid online detection method for slick water parameters |
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| CN112069746A (en) * | 2020-09-14 | 2020-12-11 | 陕西延长石油（集团）有限责任公司 | Fracturing string friction resistance testing method based on virtual parallel equal differential pressure method |
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| CN117347578A (en) * | 2023-10-10 | 2024-01-05 | 重庆地质矿产研究院 | Rapid online detection method for slick water parameters |
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