CN110261284A - A kind of experimental provision and evaluation method of water solubility diverting agent sealing characteristics - Google Patents
A kind of experimental provision and evaluation method of water solubility diverting agent sealing characteristics Download PDFInfo
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- CN110261284A CN110261284A CN201910679857.3A CN201910679857A CN110261284A CN 110261284 A CN110261284 A CN 110261284A CN 201910679857 A CN201910679857 A CN 201910679857A CN 110261284 A CN110261284 A CN 110261284A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 99
- 238000007789 sealing Methods 0.000 title claims abstract description 39
- 238000011156 evaluation Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 34
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000004090 dissolution Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 9
- 238000002474 experimental method Methods 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims description 6
- 239000002981 blocking agent Substances 0.000 claims description 4
- 238000007373 indentation Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000004088 simulation Methods 0.000 abstract description 15
- 230000006978 adaptation Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The present invention relates to the experimental provisions and evaluation method of a kind of water-soluble diverting agent sealing characteristics, belong to oil-gas field development fracturing technique field.It is made of electrical plunger pump, seam plate etc.；Electrical plunger pump is through pipeline and is connected to precision pressure gauge, relief valve, the row's of returning pressurizing valve and blocks pressurizing valve, the row's of returning pressurizing valve is connect with outlet plug and preheating cover, preheating can attaching, preheating can is equipped with primary heater outside, left side is connect equipped with the inlet valve that temperature-controlled cabinet, beneath right side are welded with plank bed is stitched, and seam plank bed centre is equipped with secondary heater equipped with seam plate, outside；It exports plug right end and outlet valve is housed.9 steps intuitively obtain construction temperature, reaction, dissolution time, water-soluble diverting agent weight and partial size and injection pressure to the relative effect of sealing characteristics through the invention, realize overall merit, preferential screening adaptation diverting agent.It is small to solve the prior art scope of application, is unable to real simulation actual condition, it is difficult to accurate the problem of sealing characteristics and the row's of returning evaluation data are provided.
Description
Technical field
The present invention relates to the experimental provisions and evaluation method of a kind of water-soluble diverting agent sealing characteristics, belong to oil-gas field development pressure
Split technical field.
Background technique
LOW PERMEABILITY RESERVOIR, which must carry out fracturing reform, could obtain preferable harvesting effect.Fracturing reform be unable to do without diverting agent,
Diverting agent should have good sealing characteristics, be conducive to de-plugging after completing to block again and return row, avoid damaging reservoir,
Therefore, in advance to the performance of diverting agent make evaluation it is most important.Existing evaluation experimental device mostly uses greatly rock core flowing examination
Pressure in testing breaks through method and carries out experimental evaluation to the sealing characteristics of diverting agent, and diverting agent is dispersed or pre- cementing state, is used
Fixed-analog seam plate one-to-one can only accept matched diverting agent particle, the scope of application is minimum, is unable to real simulation
Practice of construction operating condition, experiment condition have big difference with actual formation condition, it is difficult to which accurate offer sealing characteristics and flowback effect are commented
Valence mumber evidence, and experiment flow is long, complicated for operation, is unfavorable for earlier research and evaluation to diverting agent, after seriously affecting diverting agent
Phase quickly, adaptation application.
Summary of the invention
It is an object of the present invention in view of the above shortcomings of the prior art, provide one kind can to greatest extent real simulation it is real
Border working condition has different-grain diameter, replaceable simulation seam plate, is inputted by electrical plunger pump constant compression power, real
The diverting agent for now simulating different weight or partial size is strong in different closure under the conditions of simulating seam board width and different sealed depths
Test while spending and return row pressure power, it is possible to provide preferred diverting agent formula, dosage and sealed depth block all construction parameters of pressure
Water-soluble diverting agent sealing characteristics experimental provision and evaluation method.
The present invention is to realize above-mentioned purpose by the following technical solutions:
A kind of experimental provision and evaluation method of water blanket dissolubility diverting agent sealing characteristics, it is characterised in that: the pressure break is used
The experimental provision of water-soluble diverting agent sealing characteristics, it by electrical plunger pump, preheating can, seam plank bed, seam plate, temperature-controlled cabinet,
Support, primary heater and secondary heater are constituted；The outlet of electrical plunger pump passes through pipeline and is connected to precision pressure gauge, pressure release
Valve, the row's of returning pressurizing valve and closure pressurizing valve, the row's of returning pressurizing valve are connect with outlet plug, block pressurizing valve and preheating cover attaching,
Cover is preheated by screw thread and preheating can attaching, preheating can is fixedly mounted on the support by bolt, and the outside of preheating can is equipped with the
The left side of one heater, preheating can is equipped with temperature-controlled cabinet；Right side is welded with inlet valve, inlet valve and seam plank bed under preheating can
Seamed plate is installed in connection, seam plank bed centre, and the outside for stitching plank bed is equipped with secondary heater；The right end of seam plank bed is equipped with outlet
Plug, outlet plug right end are equipped with outlet valve.
The slot input end production of the seam plate has 30~60 ° of chamfering, and stitching the outlet end of plate, to be equipped with third O-shaped close
Seal, the slotted wall surface production for stitching plate have reticulate pattern waterline.
The length of the seam plate is 60~70mm, and the slot slit width of the seam plate is respectively 1mm, 2 mm, 3 mm, 4
Mm, 5 mm, a height of 35~40mm of the seam of slot.
The temperature-controlled cabinet is connect by bolt with primary heater.
The preheating cover is sealed by the first O-ring seal with preheating can and connect fastening by internal and external threads.
The inlet valve is sealed by the second O-ring seal with seam plank bed and connect fastening by internal and external threads.
A kind of evaluation method of the experimental provision of water blanket dissolubility diverting agent sealing characteristics, which is characterized in that it includes
Following steps:
1) should include but is not limited to according to well site geologic information and corresponding diverting agent performance requirement contrived experiment scheme, experimental program
The following contents: the width of plate, partial size, weight, experimental temperature, reaction time, the dissolution time of water-soluble diverting agent are stitched；
2) it selects the seam plate to match with water-soluble diverting agent partial size and installs；
3) water and water-soluble diverting agent that would be heated to 60~180 DEG C of experimental temperature pass through electrical plunger pump with 10~30mL/min
Flow, 1~5MPa pressure inject and be pressed into the slot of seam plate, and pressure is kept to reach 1~6 h of reaction time；
4) continue to pressurize, breakthrough pressure when water droplet occurs in record outlet valve；The pressure of venting preheating can takes out seam plate, measurement
The depth of diverting agent indentation and the thickness for stitching preceding diverting agent, calculate breakthrough pressure and comprehensive depth --- and diverting agent is pressed into slot
The ratio of depth+seam front edge of board diverting agent thickness is the plugging strength of water-soluble diverting agent；
5) step 1), step 2 and step 3), the pressure of venting preheating can are repeated, starting electrical plunger pump is pressurizeed by the row of returning
Valve, outlet plug opposite joint plate are reversely pressurizeed, and pressure when record pressure declines suddenly is the maximum of water-soluble diverting agent
Return row pressure power；
6) according to step 2~step 5) measurement certain temperature and under the conditions of the time, difference stitches plates in different water-soluble diverting agents
Row pressure power is returned in plugging strength and certain time under partial size, weight condition；
7) it measures under the identical partial size for stitching plate and identical water-soluble diverting agent, weight condition according to step 2~step 5) not
Row pressure power is returned in plugging strength and certain time under the conditions of the synthermal and time；
8) data, chart and curve are established by experiment, intuitively obtains construction temperature, reaction time, dissolution time, water solubility temporarily
Relative effect of the weight and partial size and injection pressure of blocking agent to sealing characteristics；
9) sealing characteristics of overall merit water solubility diverting agent filters out the water-soluble diverting agent being adapted to accordingly, final adjustment
Optimize site operation scheme.
The beneficial effect of the present invention compared with prior art is:
The experimental provision of the water blanket dissolubility diverting agent sealing characteristics is scientific and reasonable for structure, and simple and quick, use is safe
Reliably；Using electrical plunger pump as pressurization power source, realizes constant high input voltage, effectively prevent using gas source or advection
The limitation that moulding pressure is low, flow is small when pumping as power source stitches plate using with replaceable simulation reticulate pattern, increases seam
The contact area and coefficient of friction of plate and water-soluble diverting agent, improve the authenticity of simulation, and the setting row's of returning pressure valve, outlet are stifled
Head realizes that synchronism detection returns row pressure power, enhances the overall merit function to water-soluble diverting agent sealing characteristics, improve experiment
Efficiency.Evaluation method of the invention measured certain temperature based on experimental provision, through nine steps and under the conditions of the time, no
With plugging strength of the seam plate under the partial size, weight condition of different water-soluble diverting agents and row pressure power is returned, and the identical seam plate of measurement
And plugging strength and the row of returning under the partial size of identical water-soluble diverting agent, weight condition under the conditions of different temperature and times
Pressure, real simulation actual working conditions establish experimental data, chart and song most similar to field application environment to greatest extent
Line intuitively obtains the weight and partial size of construction temperature, reaction time, dissolution time and water-soluble diverting agent, and injection pressure
Power realizes the oil gas water blanket dissolubility diverting agent of overall merit, preferential screening adaptation, very to the relative effect of sealing characteristics
Be conducive to adjust and optimize site operation scheme.Solve it is existing using fixed-analog seam plate can only one-to-one experimental evaluation, fit
It is minimum with range, it is unable to real simulation practice of construction operating condition, experiment condition has big difference with actual formation condition, it is difficult to accurately mention
For sealing characteristics and flowback effect overall merit data, and experiment flow is long, problem complicated for operation.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the experimental provision of water blanket dissolubility diverting agent sealing characteristics；
Fig. 2 is the schematic diagram of the section structure for stitching plank bed；
Fig. 3 is the side structure schematic view for stitching plank bed.
In figure: 1, electrical plunger pump, 2, precision pressure gauge, 3, relief valve, 4, the row's of returning pressurizing valve, 5, closure pressurizing valve, 6,
Preheat cover, the 7, first O-ring seal, 8, preheating can, 9, temperature-controlled cabinet, 10, primary heater, 11, inlet valve, 12, branch
Seat, the 13, second O-ring seal, 14, seam plank bed, 15, secondary heater, 16 seam plates, 17, third O-ring seal, 18, outlet spiral shell
Mother, 19, outlet plug, 20, outlet valve；160, slotted wall, 161, slot.
Specific embodiment
The implementation of experimental provision to the water blanket dissolubility diverting agent sealing characteristics and evaluation method with reference to the accompanying drawing
Mode is described in further detail (referring to Fig. 1~3):
A kind of experimental provision and evaluation method of water blanket dissolubility diverting agent sealing characteristics, it is characterised in that: the pressure break is used
The experimental provision of water-soluble diverting agent sealing characteristics, it is by electrical plunger pump 1, preheating can 8, seam plank bed 14, seam plate 16, temperature control
Case 9 processed, support 12, primary heater 10, secondary heater 15 are constituted；The outlet of electrical plunger pump 1 passes through pipeline and is connected to essence
Close pressure gauge 2, relief valve 3, the row's of returning pressurizing valve 4 and closure pressurizing valve 5, the row's of returning pressurizing valve 4 are connect with outlet plug 19, are blocked and are added
Pressure valve 5 and preheating 6 attaching of cover, preheating cover 6 are packed in support by bolt by screw thread and 8 attaching of preheating can, preheating can 8
On 12, the outside of preheating can 8 is equipped with primary heater 10, and the left side of preheating can 8 is equipped with temperature-controlled cabinet 9；Under preheating can 8
Right side is welded with inlet valve 11, and inlet valve 11 is connect with seam plank bed 14, stitches and installs seamed plate 16 among plank bed 14, seam plank bed 14
Outside is equipped with secondary heater 15；The right end of seam plank bed 14 is equipped with outlet plug 19, and outlet 19 right end of plug is equipped with out
Mouth valve 20；Seam plate 16 is identical by shape and one group of cylinder that the slit width of slot 161 is different forms.
161 input end of the slot production of the seam plate 16 has 30~60 ° of a chamfering, and the outlet end of seam plate 16 is equipped with the
160 surface of the slotted wall production of three O-ring seals 17, seam plate 16 has reticulate pattern waterline.
The length of the seam plate 16 is 60~70mm, and 161 slit width of slot of the seam plate 16 is respectively 1mm, 2 mm, 3
Mm, 4 mm, 5 mm, a height of 35~40mm of the seam of slot 161.
The temperature-controlled cabinet 9 is connect by bolt with primary heater 10.
The preheating cover 6 is sealed by the first O-ring seal 7 with preheating can 8 and connect fastening by internal and external threads.
The inlet valve 11 is sealed by the second O-ring seal 13 with seam plank bed 14 and connect fastening by internal and external threads.
A kind of evaluation method of the experimental provision of water blanket dissolubility diverting agent sealing characteristics, which is characterized in that it includes
Following steps:
1) should include but is not limited to according to well site geologic information and corresponding diverting agent performance requirement contrived experiment scheme, experimental program
The following contents: the width of the slot 161 of seam plate 16, the partial size of water-soluble diverting agent, weight, experimental temperature, reaction time, dissolution
Time；(reaction time is the swelling time of water-soluble diverting agent, only when water-soluble diverting agent is sufficiently swollen, could be formed most
Strong plugging effect.Dissolution time is the time that water-soluble diverting agent is completely dissolved under formation conditions, and water-soluble diverting agent is complete
After fully or partially dissolving, the row of returning can be formed under condition of formation pressure)；
2) it selects the seam plate 16 to match with water-soluble diverting agent partial size and installs, be subsequently mounted outlet plug 19 and outlet
Valve 20.(slit width of the slot 161 of seam plate 16 is too small, and diverting agent is not easy to be pressed into, and the slit width for stitching the slot 161 of plate 16 is excessive, temporarily
Blocking agent cannot form effective closure when injecting)；
3) water and water-soluble diverting agent that would be heated to 60~180 DEG C of experimental temperature pass through electrical plunger pump 1 with 10~30mL/
The flow of min, the pressure of 1~5MPa inject and be pressed into seam plate 16 slot 161 in, and keep pressure reach the reaction time 1~
6h；(inlet valve 11 is being closed before this, water and water-soluble diverting agent is being put into preheating can 8, fastens preheating cover 6 and connect
Pressurized pipeline sets heating temperature, starts primary heater 10 and secondary heater 15 heats)；
4) continue to pressurize, breakthrough pressure when there is water droplet of record outlet valve 20 stops pressurization simultaneously venting preheating can 8
Pressure is taken out and stitches plate 16, and the depth of measurement diverting agent indentation and the thickness for stitching preceding diverting agent calculate breakthrough pressure and synthesis is deep
The ratio that degree --- diverting agent is pressed into the thickness of the 16 front end diverting agent of depth+seam plate of slot 161 is water-soluble diverting agent
Plugging strength；(if diverting agent is all the depth that finger pressure enters in indentation slot 161, if also remained outside slot 161,
It just include the thickness of diverting agent before stitching)；
5) step 1), step 2 and step 3), the pressure of venting preheating can 8 are repeated, starting electrical plunger pump 1 is pressurizeed by the row of returning
Valve 4, outlet 19 opposite joint plate 16 of plug are reversely pressurizeed, and record pressure when pressure declines suddenly i.e. by precision pressure gauge 2
Row pressure power is returned for the maximum of water-soluble diverting agent；
6) according to step 2~step 5) measurement certain temperature and under the conditions of the time, difference stitches plates 16 in different water-soluble diverting agents
Partial size, return row pressure power in plugging strength and certain time under weight condition；
7) according to step 2~step 5) measure under the partial size of identical seam plate 16 and identical water-soluble diverting agent, weight condition
Row pressure power is returned in different temperatures and plugging strength and certain time under the conditions of the time；
8) data, chart and curve are established by experiment, intuitively obtains construction temperature, reaction time, dissolution time, water solubility temporarily
Relative effect of the weight and partial size and injection pressure of blocking agent to sealing characteristics；
9) sealing characteristics of overall merit water solubility diverting agent filters out the water-soluble diverting agent being adapted to accordingly, final adjustment
Optimize site operation scheme.
The experimental provision and evaluation method of the water blanket dissolubility diverting agent sealing characteristics, the electrical plunger pump 1 have
Constant pressure and Flow Output Property, pressure are not less than 40MPa, and flow is not less than 30mL/min, meets under specified conditions
Hyperpressure or flow injection require.The preheating can 8 is connected by screw thread with preheating cover 6, and the lower part of preheating can 8 passes through
Bolt is connected with support 12, and the beneath side of preheating can 8 is welded with inlet valve 11, and the left end of the seam plank bed 14 passes through screw thread
It is connected with inlet valve 11, the outlet plug 19 of the right end installation of seam plank bed 14 is fixed by outlet nut 18, outlet plug 19
Right end is equipped with outlet valve 20.Outlet plug 19 is connect by pipeline, the row's of returning pressurizing valve 4 with the electrical plunger pump 1, can be surveyed
Determine the closure under certain condition and returns row pressure power.The primary heater 10 is fixed on the outside of preheating can 8, the temperature-controlled cabinet
9 are connect by bolt with primary heater 10, and the secondary heater 15 is fixed on the outside of seam plank bed 14, temperature-controlled cabinet 9
Simultaneously or separately preheating can 8 and seam plank bed 14 can be heated, heating temperature can reach at least 180 DEG C, fully meet specified conditions
Under temperature simulation requirement.The preheating cover 6 is sealed by the first O-ring seal 7 with preheating can 8 and is connect by internal and external threads
Fastening, inlet valve 11 are sealed by the second O-ring seal 13 with seam plank bed 14 and connect fastening by internal and external threads.First is O-shaped close
Seal 7, the second O-ring seal 13 and third O-ring seal 17 select fluorubber material, ensure that excellent close under hot conditions
Sealing property.
The seam plate 16 is mounted on the middle part of seam plank bed 15, and the outlet end of seam plate 16 is equipped with third O-ring seal 17, stitches
160 surface of slotted wall of plate 16 is machined with reticulate pattern waterline, and the contact area and friction for increasing slotted wall 160 and water-soluble diverting agent are
Number, improves the authenticity of simulation.161 input end of the slot production of seam plate 16 has 30~60 ° of chamfering, ensure that diverting agent
Smoothly injection, seam plate 16 have it is multiple, seam plate 16 is identical by shape and one group of cylinder that the slit width of slot 161 is different forms, it is described
The length for stitching plate 16 is 60~70mm, and the slit width of the slot 161 is respectively 1mm, 2 mm, 3 mm, 4 mm, 5 mm, slot 161
The a height of 35~40mm of seam, that is, constitute the different seam plate 16 of multiple slit widths；The seam plate 16 meets the temporary stifled of different-grain diameter
Requirement of experiment of agent under the conditions of different injection pressures, weight, partial size and the injection of the compression distance and diverting agent of diverting agent are pressed
Power associated.
The experimental provision of water blanket dissolubility diverting agent sealing characteristics of the present invention uses electrical plunger pump constant compression power
Input, the limitation that moulding pressure is low, flow is small when effectively preventing using gas source or constant-flux pump as power source, and use rock
When heart flow test method can only simulation core front end block test and cannot simulate slot test deficiency, have different-grain diameter
, replaceable simulation stitch plate 16, realize simulation of the diverting agent in different slit widths of simulation different weight or partial size well
Plugging strength under the conditions of seam plate 16 and different sealed depth and test while return row pressure power, real simulation is practical to greatest extent
Working condition establishes experimental data, chart and curve most similar to field application environment, when intuitively obtaining construction temperature, reaction
Between, the weight and partial size and injection pressure of dissolution time and water-soluble diverting agent to the relative effect of sealing characteristics, realize
The oil gas water blanket dissolubility diverting agent of overall merit, preferential screening adaptation is advantageous to adjust and optimize site operation side
Case.
The above is presently preferred embodiments of the present invention, and the example above explanation not make for the essence of the present invention by content
Limitation in any form, technology of the person of an ordinary skill in the technical field after having read this specification according to the present invention
Essence is to any simple modification or deformation made by the above specific embodiment, and the technology contents possibly also with the disclosure above
The equivalent embodiment of equivalent variations is changed or is modified to, all of which are still within the scope of the technical scheme of the invention, without departing from
The spirit and scope of the invention.
Claims (7)
1. a kind of experimental provision of water blanket dissolubility diverting agent sealing characteristics, it is characterised in that: it by electrical plunger pump (1),
Preheating can (8), seam plank bed (14), seam plate (16), temperature-controlled cabinet (9), support (12), primary heater (10), the second heating
Device (15) is constituted；The outlet of electrical plunger pump (1) passes through pipeline and is connected to precision pressure gauge (2), relief valve (3), the row's of returning pressurization
Valve (4) and closure pressurizing valve (5), the row's of returning pressurizing valve (4) are connect with outlet plug (19), block pressurizing valve (5) and preheating cover
(6) attaching, preheating cover (6) are packed on support (12) by screw thread and preheating can (8) attaching, preheating can (8) by bolt,
The outside of preheating can (8) is equipped with primary heater (10), and the left side of preheating can (8) is equipped with temperature-controlled cabinet (9)；Preheating can
(8) right side is welded with inlet valve (11) under, and inlet valve (11) is connect with seam plank bed (14), and installation is seamed among seam plank bed (14)
The outside of plate (16), seam plank bed (14) is equipped with secondary heater (15)；The right end of seam plank bed (14) is equipped with outlet plug
(19), plug 19 is exported) right end is equipped with outlet valve (20)；Seam plate (16) have it is multiple, seam plate (16) identical by shape and slot
(161) the different one group of cylinder composition of slit width.
2. a kind of experimental provision of water blanket dissolubility diverting agent sealing characteristics according to claim 1, it is characterised in that:
Slot (161) the input end production of the seam plate (16) has 30~60 ° of chamfering, and the outlet end of seam plate (16) is equipped with third
Slotted wall (160) the surface production of O-ring seal (17), seam plate (16) has reticulate pattern waterline.
3. a kind of experimental provision of water blanket dissolubility diverting agent sealing characteristics according to claim 1, it is characterised in that:
The length of the seam plate (16) be 60~70mm, the slit width of the slot (161) be respectively 1mm, 2 mm, 3 mm, 4 mm,
5 mm, a height of 35~40mm of seam of the slot (161).
4. a kind of experimental provision of water blanket dissolubility diverting agent sealing characteristics according to claim 1, it is characterised in that:
The temperature-controlled cabinet (9) is connect by bolt with primary heater (10).
5. a kind of experimental provision of water blanket dissolubility diverting agent sealing characteristics according to claim 1, it is characterised in that:
The preheating cover (6) is sealed by the first O-ring seal (7) with preheating can (8) and connect fastening by internal and external threads.
6. a kind of experimental provision of water blanket dissolubility diverting agent sealing characteristics according to claim 1, it is characterised in that:
The inlet valve (11) is sealed by the second O-ring seal (13) with seam plank bed (14) and connect fastening by internal and external threads.
7. a kind of evaluation method of the experimental provision of water blanket dissolubility diverting agent sealing characteristics according to claim 1,
It is characterized in that, it includes the following steps:
1) should include but is not limited to according to well site geologic information and corresponding diverting agent performance requirement contrived experiment scheme, experimental program
The following contents: slot (161) slit width of seam plate (16), the partial size of water-soluble diverting agent, weight, experimental temperature, the reaction time, molten
Solve the time；
2) it selects the seam plate (16) to match with water-soluble diverting agent partial size and installs；
3) water and water-soluble diverting agent that would be heated to 60~180 DEG C of experimental temperature pass through electrical plunger pump (1) with 10~30mL/
The flow of min, the pressure of 1~5MPa are injected and are pressed into seam plate (16), and pressure is kept to reach 1~6h of reaction time；
4) continue to pressurize, breakthrough pressure when there is water droplet of record outlet valve (20)；Stop pressurization venting preheating can (8)
Pressure, take out seam plate (16), the depth of measurement diverting agent indentation and before stitching diverting agent thickness, calculate breakthrough pressure and synthesis
Depth --- diverting agent is pressed into the closure of the as water-soluble diverting agent of ratio of depth+seam front edge of board diverting agent thickness of slot
Intensity；
5) step 1), step 2 and step 3), the pressure of venting preheating can (8) are repeated, starting electrical plunger pump (1) passes through the row of returning
Pressurizing valve (4), outlet plug (19) opposite joint plate (16) are reversely pressurizeed, and pressure when record pressure declines suddenly is as water-soluble
The maximum of property diverting agent returns row pressure power；
6) according to step 2~step 5) measurement certain temperature and under the conditions of the time, different seams plate (16) are temporarily stifled in different water solubilitys
Row pressure power is returned in the partial size of agent, the plugging strength and certain time under weight condition；
7) according under the partial size of identical seam plate (16) of step 2~step 5) measurement and identical water-soluble diverting agent, weight condition
Row pressure power is returned in plugging strength and certain time under the conditions of different temperatures and time；
8) data, chart and curve are established by experiment, intuitively obtains construction temperature, reaction time, dissolution time, water solubility temporarily
Relative effect of the weight and partial size and injection pressure of blocking agent to sealing characteristics；
9) sealing characteristics of overall merit water solubility diverting agent filters out the water-soluble diverting agent being adapted to accordingly, final adjustment
Optimize site operation scheme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679857.3A CN110261284B (en) | 2019-07-26 | 2019-07-26 | Experimental device and evaluation method for plugging performance of water-soluble temporary plugging agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679857.3A CN110261284B (en) | 2019-07-26 | 2019-07-26 | Experimental device and evaluation method for plugging performance of water-soluble temporary plugging agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110261284A true CN110261284A (en) | 2019-09-20 |
| CN110261284B CN110261284B (en) | 2024-01-19 |
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