CN110500076A - It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture - Google Patents
It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture Download PDFInfo
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- CN110500076A CN110500076A CN201910640955.6A CN201910640955A CN110500076A CN 110500076 A CN110500076 A CN 110500076A CN 201910640955 A CN201910640955 A CN 201910640955A CN 110500076 A CN110500076 A CN 110500076A
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000004088 simulation Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 229920001285 xanthan gum Polymers 0.000 claims description 6
- 241000196324 Embryophyta Species 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000000230 xanthan gum Substances 0.000 claims description 5
- 229940082509 xanthan gum Drugs 0.000 claims description 5
- 235000010493 xanthan gum Nutrition 0.000 claims description 5
- 244000007835 Cyamopsis tetragonoloba Species 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- -1 hydroxypropyl Chemical group 0.000 claims description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 235000019580 granularity Nutrition 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000011161 development Methods 0.000 abstract description 5
- 238000011156 evaluation Methods 0.000 description 9
- 238000011160 research Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000002981 blocking agent Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000855 fungicidal effect Effects 0.000 description 3
- 239000000417 fungicide Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
-
- 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
-
- 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
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Pipeline Systems (AREA)
Abstract
The present invention relates to a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, it is completed by full-automatic temporarily stifled experimental rig, the device is made of fluid reservoir, constant flow pump, the intermediate receptacle with plunger, seam plate holder, liquids recovery bucket, electronic balance, computer, there is key joint plate in seam plate holder, key joint plate forms simulation fracture, this method comprises: (1) adjusts the width and disengaging mouth-shaped of simulation fracture by key joint plate；(2) it prepares and carries liquid, diverting agent is dispersed to and is carried in liquid；(3) pumpage is set, constant flow pump is opened；(4) each node pressure value and filter loss are recorded in real time, and when temporary stifled pressure reduces suddenly, termination of pumping, release opens simulation fracture, observes the forming position of bridge blinding；(5) change carrying of liquids system, diverting agent type, flaw size and shape, repeat (1)-(4).The principle of the invention is reliable, easy to operate, can optimize crack and temporarily block up scheme, promote the development of the temporary deblocking technology technology of pressure break.
Description
Technical field
Complex Temporary Blocking the present invention relates to one of oil and gas storey increase design field for temporarily stifled turnaround fracture
Method can solve the optimization problem that scheme is temporarily blocked up in temporarily stifled acid fracturing crack, promote the development of the temporary deblocking technology technology of pressure break.
Background technique
Fracture acidizing is one of the important measures of carbonate reservoir storey increase design, and can key problem in technology be entirely to store up
Layer uniform acid distribution links up pit shaft and reservoir to release the pollution of near wellbore zone and generate new flow channel, improves oil/gas well
Yield.Shortly after many land oil fields are established, due to stratum energy failure, pressing crack construction is taken to be transformed a large amount of oil/gas wells,
The new crack of reservoir is opened, good frscturing effect is obtained.Nowadays many old fileds have entered the high water-cut stage development phase,
As the comprehensive control measures to old filed, a kind of crack generation steering technique is proposed, is exactly to be formed to block up in original fracture
Plug, reaches certain breakthrough pressure, in the multiple fracturing technique for opening new crack along other orientation.Multiple fracturing technique most has
The method of effect is to be blocked old crack with temporary stifled material, is then injected into fracturing fluid and carries out pressure break to stratum again, with old crack
There is the side of certain angle to upwardly open new crack, can not only increase crude output in this way, but also the water yield in oil field can be reduced.This
Item technology, which is otherwise known as, to be turned to acid fracturing or temporarily blocks up ACID FRACTURING TECHNOLOGY, is had very important significance to oil gas field storey increase design.
Temporary stall is roughly divided into mechanical steering, chemistry diversion and fiber to ACID FRACTURING TECHNOLOGY and turns to three classes.Mechanical steering is substantially
It is divided into stifled ball steering, packer turns to, coiled tubing turns to and maximum charge velocity steering, chemistry diversion are roughly divided into chemical micro-
Grain turns to, foam turns to, polymer turns to and VES turns to acid and turns to.Since 21 century, fiber grain compounds steering technique with it
Easy to operate, acquisition pollution-free to reservoir is more and more to be approved.Chinese patent CN201511015214.7 provides a kind of reality
Temporarily stall is to the method for multiple crack fracturing in existing net horizontal section, but the system carries liquid complicated components, and carrying of liquids system only has guanidine
The case where glue is a kind of, is not applied for all horizontal wells；Chinese patent CN103835691 proposes a kind of cracky generation side
Method realizes temporary stall to but temporarily blocking up in this method by the way that high-intensitive water-soluble granular diverting agent is added after crack presses off
Particle dispersion is poor, in the wellbore a large amount of depositions, it is difficult to realize and uniformly block, be not easy to promote the use of on a large scale.Chinese patent
CN201810899545.9 proposes a kind of method for realizing temporarily stifled turnaround fracture using pressure difference polymerization diverting agent, passes through powder-type
Pressure difference diverting agent and particle diverting agent are used in mixed way to realize Complex Temporary Blocking, but the otherness of reservoir stress and injection pressure break
Influence of the liquid to formation temperature can all cause temporarily to block up effect and be expected to differ greatly.
It is the main method realizing fracturing fracture and turning to that crack, which is temporarily blocked up, and common diverting agent includes fiber, more partial size solids
Particle etc..Research shows that the temporary stifled intensity that solo fibre temporarily blocks up is not too much high, therefore research and develop a kind of effective Complex Temporary Blocking
Forward method has very important significance to oil-gas field development.
Summary of the invention
The purpose of the present invention is to provide a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, and this method principle can
It leans on, easy to operate, compounding temporary plugging technique by research fiber-particulate-temporary blocking poawer end enhances crack temporarily stifled effect, promotes crack and turns
To and the degree split of seam network pressure, carry out compounding temporarily stifled experimental study, determine fiber-particulate-temporary blocking poawer end under the conditions of different parameters
Compound the temporary stifled ability of temporary plugging technique, while determination diverting agent concentration, grain diameter, pumpage, slit width, crack roughness, more
The factors fracture such as granularity compounding and different carrying of liquids system temporarily blocks up the influence of effect, so that optimizing crack temporarily blocks up scheme, pushes away
Into the development of the temporary deblocking technology technology of pressure break.
To reach the above technical purpose, the present invention uses following technical scheme.
It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, completed by full-automatic temporarily stifled experimental rig, the device
It is made of fluid reservoir, constant flow pump, the intermediate receptacle with plunger, seam plate holder, liquids recovery bucket, electronic balance, computer, institute
Stating has key joint plate in seam plate holder, key joint plate forms simulation fracture, and outside is connected with pressure gauge, and left end is sequentially connected band
Intermediate receptacle, constant flow pump, the fluid reservoir of plunger, right end connect liquids recovery bucket, and liquids recovery bucket position is on electronic balance, institute
State pressure gauge, constant flow pump, electronic balance and be all connected with computer, this method successively the following steps are included:
(1) according to the formation fracture requirement that need to be simulated, the fracture width of simulation fracture is adjusted by key joint plate and crack passes in and out
Mouth-shaped；
(2) it prepares and carries liquid, diverting agent is dispersed to and is carried in liquid, and is uniformly mixed；
(3) attachment device pipeline sets pumpage, opens constant flow pump；
(4) each node pressure value and filter loss are recorded in real time, when temporary stifled pressure (stitching the left and right ends pressure difference of plate holder)
When reducing suddenly, experiment, termination of pumping are terminated, release opens simulation fracture, observes the forming position of bridge blinding；
(5) change carrying of liquids system, diverting agent type, flaw size and shape, repeat (1)-(4), statistical is carried out to data
Analysis, obtains different carrying liquid, diverting agent concentration and type, grain diameter, more granularities compounding, slit width, crack roughness fracture
The temporarily influence of stifled effect, so that optimizing crack temporarily blocks up scheme.
Further, above-mentioned fracture width is 2mm-7mm, and fracture shape is key joint or parallel seam.
Further, above-mentioned diverting agent is soluble temporarily stifled fiber, in water-soluble temporary stifled particle, plant xanthan gum powder
One or more of mixtures.
Further, above-mentioned soluble temporarily stifled fibre length is 3-8mm, and water-soluble temporarily stifled particle diameter size is 5-30
Mesh, plant xanthan gum powder particle size are 80-150 mesh.
Further, above-mentioned diverting agent dosage is 0.4-2wt%.
Further, above-mentioned carrying liquid is hydroxypropyl guar, oleic acid-induced clean fracturing fluid, slippery water, one in linear glue
Kind.
Further, above-mentioned carrying liquid dosage is 0.4-4wt%.
Further, the discharge capacity of above-mentioned constant flow pump is 70-270ml/min.
Compared with prior art, the invention has the following advantages:
Temporarily stifled experiment crack is adjustable for present invention simulation, simulation test can be carried out to the crack of different shape and size, with reality
Crack is more nearly；Fine and close plugged zone can not be formed using a kind of individually diverting agent for wider crack, airtightness compared with
Difference causes steering pressure not high or turns to failure, and the collocation of varying strength size diverting agent uses, and substantially increases diverting agent
Service efficiency and pressure break success rate.
Detailed description of the invention
Fig. 1 is full-automatic temporarily stifled experimental rig structural schematic diagram.
In figure: 1- display, 2- constant flow pump, 3- fluid reservoir, intermediate receptacle of the 4- with plunger, 5- key joint plate, 6- stitch plate
Clamper, 7- liquids recovery bucket, 8- computer, 9- pressure gauge, 10- electronic balance.
Fig. 2 is that Complex Temporary Blocking agent temporarily blocks up injection pressure in performance evaluation and changes with time figure in embodiment 1.
Fig. 3 is that Complex Temporary Blocking agent temporarily blocks up injection pressure in performance evaluation and changes with time figure in embodiment 2.
Fig. 4 is that Complex Temporary Blocking agent temporarily blocks up injection pressure in performance evaluation and changes with time figure in embodiment 3.
Fig. 5 is that Complex Temporary Blocking agent temporarily blocks up injection pressure in performance evaluation and changes with time figure in embodiment 4.
Specific embodiment
The present invention is further illustrated below according to attached drawing and example, in order to facilitate understanding by those skilled in the art this hair
It is bright.It should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, in the column of protection.
Referring to Fig. 1.
Full-automatic temporarily stifled experimental rig, mainly by fluid reservoir 3, constant flow pump 2, the intermediate receptacle 4 with plunger, seam plate holder
6, liquids recovery bucket 7, electronic balance 10, computer 8 form, and have key joint plate 5, key joint plate shape in the seam plate holder 6
At simulation fracture, outside is connected with pressure gauge 9, and left end is sequentially connected the intermediate receptacle 4 with plunger, constant flow pump 2, fluid reservoir 3,
Right end connects liquids recovery bucket 7, and on electronic balance 10, the pressure gauge, constant flow pump, electronic balance connect liquids recovery bucket position
Computer 8 is connect, computer is connected with display 1.
The present invention fills diverting agent in simulation fracture, carries out performance evaluation to diverting agent.
Embodiment 1
It carries liquid to prepare: 0.5% hydroxypropyl guar thickening agent, 0.75% borax crosslinkers, 0.5% clay stabilizer, 0.1% sterilization
Agent.Diverting agent temporarily blocks up particle using soluble temporarily stifled fiber adding water soluble, and particle screening goes out 5-10 mesh, and fibre length 4mm adds
Enter ratio for 1.0wt%, the ratio of fiber and particle is 5:1, is dispersed in hydroxypropyl guar by high-speed stirred and carries in liquid.
Using full-automatic temporarily stifled tester (Jiangsu Hai'an scientific research apparatus Co., Ltd), diverting agent is filled in crack, it is right
Diverting agent carries out performance evaluation.The crack of the present embodiment is key joint, and having a size of 4m, inlet flaw size is 6mm in exit.
Fluid reservoir temperature and simulation fracture temperature are set as 90 DEG C, constant current pumpage is 200ml/min.As shown in Fig. 2, when opening one section of pump
Between after play pressure, filtration rate is gradually reduced, and expression temporarily blocks up oneself through initially forming, and subsequent pressure is broken through after rising to certain value
And suddenly decline, temporarily blocking up pressure can reach 12.5MPa.This example can be used for changing carrying of liquids system, adjust diverting agent type
And concentration or change flaw size, discharge capacity, study its to it is temporary block up intensity influence.
Embodiment 2
It carries liquid to prepare: 0.5% slippery water thickening agent, 0. 5% crosslinking agent, 0.1% fungicide formaldehyde.Diverting agent uses fibre length
6mm, additional proportion 1.2wt% are dispersed in slippery water by high-speed stirred and carry in liquid.
Using full-automatic temporarily stifled tester (Jiangsu Hai'an scientific research apparatus Co., Ltd), filled in simulation fracture temporarily stifled
Agent, and performance evaluation is carried out to diverting agent.The simulation fracture of the present embodiment is key joint, and exit is split having a size of 2mm, inlet
Seam is having a size of 5mm.Fluid reservoir temperature and simulation fracture temperature are set as 120 DEG C, constant current pumpage is 170ml/min.Such as Fig. 3 institute
Show, play pressure after opening pump a period of time, filtration rate is gradually reduced, and expression temporarily blocks up oneself through initially forming, and subsequent pressure rises to one
Occur to break through and suddenly decline after definite value.Illustrating to be used alone temporarily stifled fiber has apparent plugging action to 2mm, temporarily stifled pressure
Power can reach 18MPa.This example can be used for changing carrying of liquids system, adjust diverting agent type and concentration or change flaw size,
Discharge capacity studies its influence to temporary stifled intensity.
Embodiment 3
It carries liquid to prepare: 0.7% linear glue thickening agent, 0.5% crosslinking agent, 0.7% clay stabilizer potassium chloride, 0.1% fungicide first
Aldehyde.Diverting agent temporarily blocks up particle using plant xanthan rubber powder adding water soluble, and particle screening goes out 7-15 mesh, and xanthan gum additional proportion is
1.5wt%, and the ratio of particle is 4:1, is dispersed in and is carried in liquid by high-speed stirred.
Using full-automatic temporarily stifled tester (Jiangsu Hai'an scientific research apparatus Co., Ltd), diverting agent is filled in crack, it is right
Diverting agent carries out performance evaluation.The crack of the present embodiment is key joint, and having a size of 3m, inlet flaw size is 7mm in exit.
Fluid reservoir temperature and simulation fracture temperature are set as 100 DEG C, constant current pumpage is 120ml/min.As shown in figure 4, opening one section of pump
Pressure is played after time, filtration rate is gradually reduced, and expression temporarily blocks up oneself through initially forming, and subsequent pressure occurs to dash forward after rising to certain value
It breaks and suddenly declines, temporarily blocking up pressure can reach 21MPa.This example can be used for changing carrying of liquids system, adjust diverting agent type
And concentration or change flaw size, discharge capacity, study its to it is temporary block up intensity influence.
Embodiment 4
It carries liquid to prepare: 3% oleic acid clean fracturing fluid thickening agent, 0.4% clay stabilizer, 0.1% fungicide.Diverting agent is using fine
It ties up adding water soluble and temporarily blocks up particle, particle screening goes out 7-14 mesh, fibre length 5mm, additional proportion 1.4wt%, fiber and particle
Ratio be 3:1, by high-speed stirred be dispersed in carry liquid in.
Using full-automatic temporarily stifled tester (Jiangsu Hai'an scientific research apparatus Co., Ltd), diverting agent is filled in crack, it is right
Diverting agent carries out performance evaluation.The crack of the present embodiment is key joint, and having a size of 3m, inlet flaw size is 5mm in exit.
Fluid reservoir temperature and simulation fracture temperature are set as 90 DEG C, constant current pumpage is 210ml/min.As shown in figure 5, when opening one section of pump
Between after play pressure, filtration rate is gradually reduced, and expression temporarily blocks up oneself through initially forming, and subsequent pressure is broken through after rising to certain value
And suddenly decline, temporarily blocking up pressure can reach 16MPa.This example can be used for changing carrying of liquids system, adjust diverting agent type and
Concentration changes flaw size, discharge capacity, studies its influence to temporary stifled intensity.
Claims (8)
1. a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, completed by full-automatic temporarily stifled experimental rig, the device by
Fluid reservoir, constant flow pump, the intermediate receptacle with plunger, seam plate holder, liquids recovery bucket, electronic balance, computer composition, it is described
There is key joint plate in seam plate holder, key joint plate forms simulation fracture, and outside is connected with pressure gauge, and left end is sequentially connected band column
Intermediate receptacle, constant flow pump, the fluid reservoir of plug, right end connect liquids recovery bucket, and liquids recovery bucket position is described on electronic balance
Pressure gauge, constant flow pump, electronic balance are all connected with computer, this method successively the following steps are included:
(1) according to the formation fracture requirement that need to be simulated, the fracture width of simulation fracture is adjusted by key joint plate and crack passes in and out
Mouth-shaped；
(2) it prepares and carries liquid, diverting agent is dispersed to and is carried in liquid, and is uniformly mixed；
(3) attachment device pipeline sets pumpage, opens constant flow pump；
(4) each node pressure value and filter loss are recorded in real time, when temporary stifled pressure (stitching the left and right ends pressure difference of plate holder)
When reducing suddenly, experiment, termination of pumping are terminated, release opens simulation fracture, observes the forming position of bridge blinding；
(5) change carrying of liquids system, diverting agent type, flaw size and shape, repeat (1)-(4), statistical is carried out to data
Analysis, obtains different carrying liquid, diverting agent concentration and type, grain diameter, more granularities compounding, slit width, crack roughness fracture
The temporarily influence of stifled effect, so that optimizing crack temporarily blocks up scheme.
2. as described in claim 1 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that the crack
Width is 2mm-7mm, and fracture shape is key joint or parallel seam.
3. as described in claim 1 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that described temporarily stifled
Agent is one or more of soluble temporarily stifled fiber, water-soluble temporarily stifled particle, plant xanthan gum powder mixture.
4. as claimed in claim 3 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that described solvable
Property temporarily to block up fibre length be 3-8mm, water-soluble temporarily stifled particle diameter size is 5-30 mesh, and plant xanthan gum powder particle size is
80-150 mesh.
5. as described in claim 3 or 4 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that described
Diverting agent dosage is 0.4-2wt%.
6. as described in claim 1 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that the carrying
Liquid is one of hydroxypropyl guar, oleic acid-induced clean fracturing fluid, slippery water, linear glue.
7. as claimed in claim 6 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that the carrying
Liquid dosage is 0.4-4wt%.
8. as described in claim 1 a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture, which is characterized in that the constant current
The discharge capacity of pump is 70-270ml/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910640955.6A CN110500076A (en) | 2019-07-16 | 2019-07-16 | It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910640955.6A CN110500076A (en) | 2019-07-16 | 2019-07-16 | It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911147A (en) * | 2020-08-25 | 2020-11-10 | 中国石油大学(北京) | Testing device and testing method for temporary plugging diversion fracturing |
| CN111929170A (en) * | 2020-08-11 | 2020-11-13 | 成都劳恩普斯科技有限公司 | Device and method for evaluating pressure bearing performance of temporary plugging material for fracture acidizing |
| CN112431570A (en) * | 2020-11-06 | 2021-03-02 | 中国石油天然气股份有限公司 | Test method of temporary plugging agent for temporary plugging of acid fracturing |
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| CN114837645A (en) * | 2022-04-28 | 2022-08-02 | 西南石油大学 | Device and method for researching migration-blocking process of temporary blocking agent in hydraulic fracture |
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| CN112431570A (en) * | 2020-11-06 | 2021-03-02 | 中国石油天然气股份有限公司 | Test method of temporary plugging agent for temporary plugging of acid fracturing |
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| CN115370341A (en) * | 2022-04-15 | 2022-11-22 | 中国石油大学(北京) | Microscopic visual rock plate hydraulic fracturing indoor simulation method and device |
| CN115370341B (en) * | 2022-04-15 | 2023-11-28 | 中国石油大学(北京) | Microcosmic visual rock plate hydraulic fracturing indoor simulation method and device |
| CN114837645A (en) * | 2022-04-28 | 2022-08-02 | 西南石油大学 | Device and method for researching migration-blocking process of temporary blocking agent in hydraulic fracture |
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