CN113494262A - Temporary plugging agent crack plugging and bearing experimental device - Google Patents
Temporary plugging agent crack plugging and bearing experimental device Download PDFInfo
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- CN113494262A CN113494262A CN202010253841.9A CN202010253841A CN113494262A CN 113494262 A CN113494262 A CN 113494262A CN 202010253841 A CN202010253841 A CN 202010253841A CN 113494262 A CN113494262 A CN 113494262A
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- 239000012530 fluid Substances 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 11
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- 239000003795 chemical substances by application Substances 0.000 description 91
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- 238000010586 diagram Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
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- 238000004088 simulation Methods 0.000 description 6
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- 239000002981 blocking agent Substances 0.000 description 2
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- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
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- 239000002184 metal Substances 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
- 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
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Abstract
The invention provides a temporary plugging agent crack plugging and bearing experimental device, which comprises a pressure pump, a first container, a second container, a seam plate mould, a pressure detection element and a valve: a piston is arranged in the first container, the piston divides the first container into a first cavity and a second cavity which are independent, the first cavity contains a fluid medium, and the second cavity contains a fracturing base fluid; the pressure pump is communicated with the first chamber, the second container is communicated with the second chamber, and the second container is used for containing the temporary plugging agent; a simulated crack interface is formed at the bottom of the second container; the seam plate die is installed at the simulated crack interface, a wedge-shaped liquid channel is arranged inside the seam plate die, and the pressure detection element is communicated with the second cavity and used for monitoring the pressure of the second cavity. And simulating an oil-gas well through the second container, simulating a crack interface and a crack plate mould to simulate a bottom hole crack together, and judging the effect of the temporary plugging agent on the crack plugging by judging whether a mixture flows out from the valve under the pressure condition.
Description
Technical Field
The invention relates to the technical field of oil-gas exploration and development, in particular to a temporary plugging agent crack plugging and bearing experimental device
Background
At present, along with the development of oil exploitation technology, unconventional oil and gas reservoirs which are difficult to exploit originally are exploited, and countries pay more and more attention to the unconventional oil and gas reservoirs, the unconventional oil and gas reservoirs have the characteristics of deep reservoir burial depth, high temperature and high pressure, great thickness, compact matrix and the like, the natural yield of a single well is generally low, and reservoir transformation measures are required.
When a deep huge thick reservoir is reformed, because the reservoir is thick, some natural fractures can exist in the reservoir, and fracturing base fluid needs to be injected into the reservoir, so that the swept range of the fractures is expanded. Generally speaking, the fracturing base fluid can be selected to enter a crack which is easy to enter, after a certain amount of fracturing base fluid enters the crack which is easy to enter the fracturing base fluid, the crack which is easy to enter the fracturing base fluid is blocked by using a temporary blocking agent, so that the fracturing base fluid enters the crack which is relatively difficult to enter the fracturing base fluid, and then the fracturing base fluid can uniformly enter the crack which is easy to enter and the crack which is relatively difficult to enter. Whether the reconstruction of deep huge thick reservoir is successful or not is an important factor for the plugging and bearing capacity of the temporary plugging agent on cracks.
However, the plugging and pressure-bearing capacity of the temporary plugging agent on the crack under the real condition cannot be dynamically simulated under the existing conditions, the plugging and pressure-bearing capacity of the temporary plugging agent cannot be truly evaluated, and certain risk is brought to the actual production process.
Disclosure of Invention
The invention provides a temporary plugging agent crack plugging and bearing experimental device, which solves the problem of production risk caused by the fact that the plugging and bearing capacity of a temporary plugging agent to a crack under the existing condition cannot be known.
The invention provides a temporary plugging agent crack plugging and bearing experimental device, which comprises a pressure pump, a first container, a second container, a seam plate mould, a pressure detection element and a valve:
a piston is arranged in the first container, the piston divides the first container into a first chamber and a second chamber which are independent, the first chamber is used for containing fluid media, and the second chamber is used for containing fracturing base fluid;
the pressure pump is communicated with the first chamber, the second container is communicated with the second chamber, and the second container is used for containing a temporary plugging agent; the pressurizing pump is used for providing pressure to the first chamber so as to drive the piston to press the fracturing base fluid into the second container from the second chamber;
a simulated crack interface is formed at the bottom of the second container;
the slit plate die is arranged at the simulated crack interface, a wedge-shaped liquid channel is arranged inside the slit plate die, the large-diameter end of the liquid channel is communicated with the simulated crack interface, and the small-diameter end of the liquid channel is connected with the valve;
the pressure sensing element is in communication with the second chamber for monitoring the pressure of the second chamber.
Optionally, the temporary plugging agent crack plugging pressure-bearing experimental device provided by the invention further comprises an interface sleeve, the simulated crack interface is formed in the interface sleeve, and the seam plate die is fixedly connected with the interface sleeve.
Optionally, in the pressure-bearing experimental apparatus for temporary plugging agent fracture plugging provided by the invention, a plurality of interface sleeves are provided, the cross-sectional areas of the simulated fracture interfaces formed in each interface sleeve are different, and the interface sleeves are installed at the connecting ports in a replaceable manner.
Optionally, in the pressure-bearing experimental apparatus for temporary plugging agent crack plugging provided by the invention, an included angle between the axis of the liquid channel and the center line of the second container ranges from 30 ° to 90 °.
Optionally, in the pressure-bearing experimental apparatus for temporary plugging agent crack plugging provided by the invention, the second container is vertically arranged, and the position where the second container is communicated with the second chamber is located at the top of the second container.
Optionally, the temporary plugging agent crack plugging pressure-bearing experimental device provided by the invention further comprises a stirring assembly, wherein a stirring end of the stirring assembly extends into the second container.
Optionally, the temporary plugging agent crack plugging and bearing experimental device provided by the invention further comprises a thermostat with adjustable temperature, and the second container and the seam plate mold are positioned in the thermostat.
Optionally, in the pressure-bearing experimental device for temporary plugging agent crack plugging provided by the invention, the pressure detection element is a pressure gauge or a pressure sensor.
Optionally, the temporary plugging agent crack plugging and pressure-bearing experimental device provided by the invention further comprises a third container and a weighing piece for weighing the third container;
the third container is provided with a vent, and the third container is communicated with the small-diameter end of the liquid channel.
Optionally, in the pressure-bearing experimental apparatus for temporary plugging agent crack plugging provided by the invention, a liquid filling opening is arranged on the second cavity and/or the second container, and a cover body is arranged on the liquid filling opening and used for sealing the liquid filling opening.
The invention provides a temporary plugging agent crack plugging bearing experimental device, wherein a piston is arranged in a first container, the piston divides the first container into a first chamber and a second chamber, the first chamber is connected with a pressure pump, a fracturing base fluid is contained in the second chamber, the second chamber is communicated with a pressure detection element, the second chamber is communicated with a second container, the temporary plugging agent is contained in the second container, the bottom of the second container is provided with a simulated crack interface, the simulated crack interface is communicated with the large-diameter end of a seam plate mold, the small-diameter end of the seam plate mold is communicated with a valve, an oil-gas well is simulated through the second container, the simulated crack interface at the bottom of the second container and the seam plate mold simulate cracks at the bottom of the oil-gas well together, when the valve is closed, the pressure pump pressurizes to move the piston, the fracturing base fluid is pressed into the second container from the second chamber by the piston, the fracturing base fluid and the temporary plugging agent in the second container are mixed to form a mixture, and when the numerical value of the pressure detection element reaches a preset value, the valve is opened, whether the temporary plugging agent forms plugging under the pressure condition is judged by judging whether a mixture flows out of the valve, and then the plugging pressure-bearing capacity of the temporary plugging agent in the crack can be evaluated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided in the second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided by a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided by a fourth embodiment of the present invention;
FIG. 5 is a schematic structural view of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided in the fifth embodiment of the present invention;
FIG. 6 is a schematic structural view of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided by a sixth embodiment of the present invention;
fig. 7 is a schematic structural view of a filling opening and a cover body on a second container in a pressure-bearing experimental apparatus for plugging a crack with a temporary plugging agent according to a sixth embodiment of the present invention.
Description of reference numerals:
1-a pressure pump;
2-a first container;
21-a second chamber;
22-a piston;
23-a first chamber;
3-a pressure-detecting element;
4-a second container;
5-a seam plate mould;
6-a valve;
7-interface sleeve;
8-a stirring component;
81-motor;
82-a connecting rod;
83-blade;
9-a constant temperature box;
10-a weighing member;
11-a liquid filling port;
12-cover body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the process of modifying a deep huge thick reservoir, fracturing base fluid needs to be injected into the reservoir, so that the spread range of naturally existing cracks in the reservoir is larger, and some cracks which easily enter the fracturing base fluid are blocked by using the temporary blocking agent after a certain amount of fracturing base fluid enters, so that the fracturing base fluid can uniformly enter the cracks which easily enter and the cracks which are not easy to enter. Under the existing conditions, the plugging and pressure-bearing capacity of the temporary plugging agent on the crack under the real conditions can not be dynamically simulated, the plugging and pressure-bearing capacity of the temporary plugging agent can not be truly evaluated, and certain risk is brought to the actual production process.
In order to solve the problems, the invention designs a set of temporary plugging agent crack plugging and bearing experimental device which is used for simulating the plugging and bearing capacity of the temporary plugging agent to the crack under the real condition. Specifically, a second container is used to simulate a hydrocarbon well, and a booster pump is used with the first container to simulate a device for pressurizing the hydrocarbon well. The temporary plugging agent is contained in the second container, a simulated fracture interface is formed at the bottom of the second container and communicated with the large-diameter end of the fracture plate mold, the small-diameter end of the fracture plate mold is connected with the valve, and the simulated fracture interface and the fracture plate mold simulate the fracture at the bottom of the oil and gas well together. A piston is arranged in the first container, the first container is divided into a first chamber and a second chamber by the piston, the second chamber contains fracturing base fluid and is communicated with the second container, and the first chamber contains fluid medium and is communicated with a pressurizing pump. And in the pressurizing process, the fracturing base fluid in the second chamber enters the second container and is mixed with the temporary plugging agent in the second container, and the plugging and pressure-bearing capacity of the temporary plugging agent on the cracks is judged by judging whether the mixture overflows from the valve or not under the pressure condition.
Example one
Fig. 1 is a schematic structural diagram of a temporary plugging agent crack sealing and pressure-bearing experimental apparatus provided in an embodiment of the present invention, and as shown in fig. 1, the temporary plugging agent crack sealing and pressure-bearing experimental apparatus provided in this embodiment includes a pressure pump 1, a first container 2, a second container 4, a seam plate mold 5, a pressure detection element 3, and a valve 6.
The booster pump 1 may optionally be an adjustable plunger pump to drive the piston 22 to force the fracturing base fluid from the second chamber 21 into the second container 4. The booster pump 1 may communicate with the first chamber 23 of the first container 2 through a closed pipe, for example. It should be understood that the two ends of the closed conduit may be connected to the pressure pump 1 and the first chamber 23 respectively in various ways, for example, by screwing, and the embodiment is not limited as long as the connection can ensure airtightness.
The first container 2 may be a cylindrical container, a rectangular parallelepiped container, or the like, for example, fig. 1 shows that the first container 2 is a vertical cylindrical structure, that is, the first container 2 is a vertical cylindrical tank. An opening is provided in each of the top and bottom of the cylindrical tank, the top opening communicating with the pressure pump through the above-mentioned closed conduit, and the bottom opening communicating with a second container 4, which will be described later, through the same closed conduit. Of course, the present embodiment is not limited as far as the structure of the first container 2 satisfies that the piston 22 can be divided into two chambers and the piston 22 can slide in the first container 2.
As shown in fig. 1, the piston 22 is horizontally disposed inside the first container 2, thereby dividing the first container 2 into upper and lower two chambers, i.e., a first chamber 23 and a second chamber 21. The first chamber 23 is filled with a fluid medium, and the second chamber 21 is filled with a fracturing base fluid, wherein the fluid medium can be various liquids such as water, cooling liquid, oil liquid and the like, and the fracturing base fluid can be various fracturing fluids such as water-based fracturing fluid, oil-based fracturing fluid and the like. The piston 22 is free to move up and down inside the first container 2 to vary the volume of the upper and lower chambers. Illustratively, the piston 22 is a circular-like structure made of metal, which may be covered at its edges with a sealing structure.
The pressure detecting element 3 communicates with the second chamber 21 to monitor the pressure of the second chamber 21. The pressure detection element 3 may be, for example, a pressure gauge or a pressure sensor. When a pressure gauge is used as the pressure detecting element 3, the pressure gauge may display the value of the pressure of the second chamber 21; when a pressure sensor is used as the pressure detection element 3, the pressure detection element 3 can sense whether the pressure of the second chamber 21 reaches a preset value, i.e., a pressure value required for an experiment. It should be noted that what kind of element is specifically used for the pressure detection element 3, and the embodiment is not limited as long as the pressure detection element 3 can measure whether the pressure of the second chamber 21 reaches a value required by the experiment.
The second container 4 may also be a cylindrical container, a rectangular parallelepiped container, or the like, for example, fig. 1 shows that the second container 4 is a vertical cylindrical structure, that is, the second container 4 in fig. 1 is a vertical cylindrical tank. At the top of the cylindrical tank there is provided an opening which can be connected by a closed conduit to the opening at the top of the first container 2, that is to say to the second chamber 21. It will be appreciated that the connection should also be made airtight when connecting the first container 2 and the second container 4.
The second container 4 is filled with a temporary plugging agent, and the temporary plugging agent is a filamentous solid, and can be water-soluble temporary plugging agent, oil-soluble temporary plugging agent and other temporary plugging agents in various forms. Illustratively, the second container 4 may contain a fracturing base fluid and a temporary plugging agent simultaneously prior to pressurization.
The number of the simulated fracture interfaces formed at the bottom of the second container 4 is not limited, and may be one or more, for example. When the number of the simulated fracture interfaces is multiple, the multiple simulated fracture interfaces are arranged at different positions at the bottom of the second container 4 and used for simulating fractures at different positions at the bottom of different oil and gas wells after being connected with the fracture plate mold 5.
The slot plate die 5 is connected with the simulated crack interface at the bottom of the second container 4 in any way, for example, the slot plate die 5 and the second container 4 can be connected by screw threads. In some specific examples, the slot-plate die 5 may be provided in a cylindrical or prismatic configuration. A wedge-shaped liquid channel is provided inside the slot plate die 5, the large diameter end of the liquid channel is communicated with the simulated slot joint, the small diameter end of the liquid channel is connected with the valve 6, for example, the liquid channel can be connected with the valve 6 such as a gate valve, a stop valve, a ball valve, a butterfly valve and the like through a pipeline with pressure resistance, and the connection part is sealed.
The temporary plugging agent crack plugging pressure-bearing experimental device provided by the embodiment is characterized in that a temporary plugging agent is contained in a second container 4, a simulated crack interface is arranged at the bottom of the second container 4, one end of a seam plate mold 5 is installed at the simulated crack interface, the other end of the seam plate mold 5 is connected with a valve 6, the second container 4 is communicated with a second cavity of a first container 2, fracturing base fluid is contained in the second cavity, the second cavity is simultaneously connected with a first cavity of the first container 2 and contains fluid medium, the first cavity is communicated with a pressure pump 1, the temporary plugging agent crack plugging pressure-bearing experimental device is completely assembled in the experimental process, the fluid medium is added into the first cavity of the first container 2, fracturing base fluid is added into the second cavity, the temporary plugging agent is added into the second container 4, the air tightness is checked, the valve 6 is closed, the pressure pump 1 is started, a piston 22 in the first container 2 presses the fracturing base fluid in a second cavity 21 into the second container 4 to be mixed with the temporary plugging agent in the second container 4, after the pressure detection element 3 displays a certain reading, the valve 6 is opened, the output pressure of the pressure pump 1 is kept unchanged, whether a mixture flows out from the valve 6 or not is observed, if no mixture flows out, the plugging effect of the temporary plugging agent on the cracks is good, and if a mixture flows out, the plugging effect of the temporary plugging agent on the cracks is poor.
Based on the above, the temporary plugging agent shutoff pressure-bearing experimental apparatus of this embodiment adopts second container 4 simulation oil gas well, and the bottom of second container 4 simulation shaft bottom, and the simulation crack interface of second container 4 bottom simulates the crack of oil gas well bottom together with seam board mould 5, obtains the oil gas well and the crack structure completely the same with among the real environment, and force (forcing) pump 1 can simulate the device for oil gas well pressurization with first container 2, pressurize for second container 4 through force (forcing) pump 1 and first container 2, the state of exerting pressure when simulating temporary plugging agent shutoff crack. The experimental device for temporary plugging agent fracture plugging and bearing pressure simulates a real oil and gas well structure, and can simply and quickly evaluate the temporary plugging agent plugging and bearing pressure capacity.
Example two
Fig. 2 is a schematic structural view of a temporary plugging agent crack plugging pressure-bearing experimental apparatus provided in an embodiment two of the present invention, as shown in fig. 2, on the basis of the embodiment one, further, the present invention further includes an interface sleeve 7, a simulated crack interface is formed in the interface sleeve 7, and the seam plate mold 5 is fastened and connected to the interface sleeve 7.
Illustratively, the interface sleeve 7 comprises a connecting cylinder, a fixing plate is radially arranged in the middle of the connecting cylinder, and the periphery of the fixing plate extends out of the middle of the connecting cylinder. The simulation crack interface is arranged on the fixing plate and is positioned inside the connecting cylinder. The bottom of the second container 4 and the interface sleeve 7 can be connected in various ways, for example, one end of the connecting cylinder is embedded into the bottom connector of the second container 4, the connecting plate of the interface sleeve 7 is connected with the bottom of the second container 4 through a screw, at this time, the outer wall of one end of the connecting cylinder embedded into the bottom connector of the second container 4 is attached to the connector, the surface of the connecting plate is attached to the bottom of the second container 4, and the connection air tightness is guaranteed.
The interface cover 7 can be a plurality of, the cross-sectional area of the simulated crack interface formed in each interface cover 7 can be different, and these interface covers 7 can be installed at the interface in a replaceable manner, so that the simulated crack interfaces with different sizes can be formed by replacing different interface covers 7.
In this embodiment, the seam plate mold 5 is connected to the bottom of the second container 4 through the interface sleeve 7, which not only facilitates the connection between the second container 4 and the seam plate mold 5. Meanwhile, the connector sleeves 7 with different simulated fracture connectors can be replaced, so that the corresponding fracture plate mold 5 can be replaced conveniently, and the fractures with different sizes at the bottom of the oil and gas well can be simulated. The experimental device can measure the plugging pressure-bearing capacity of the temporary plugging agent to cracks with different sizes, so that the experimental result is more comprehensive.
EXAMPLE III
Fig. 3 is a schematic structural view of a temporary plugging agent fracture plugging pressure-bearing experimental apparatus provided in an embodiment of the present invention, and as shown in fig. 3, on the basis of any of the above embodiments, an included angle between an axis of the liquid channel and a center line of the second container 4 is further set to be 30 ° to 90 °.
It should be understood that when the included angle between the axis of the liquid channel and the center line of the second container 4 is 90 °, the liquid channel is perpendicular to the bottom of the second container 4, which is the most ideal situation of the fracture, but in an actual oil and gas well, the fracture and the bottom of the oil and gas well are oblique, and at this time, a certain included angle range is set between the axis of the liquid channel and the center line of the second container 4, so that fractures with different angles at the bottom of the oil and gas well can be simulated, when the included angle range is set to be 30 ° to 90 °, the conditions of all fractures at the bottom of the oil and gas well can be included, and the included angle between the axis of the liquid channel and the center line of the second container 4 is determined according to the situation of simulating the fracture.
Illustratively, when the center line of the liquid passage is inclined to the bottom of the second container 4, the angle between the axis of the liquid passage and the center line of the second container 4 may be 30 ° to 90 °. In this embodiment, the slot plate mold 5 and the second container 4 may be connected by various connecting methods, for example, the slot plate mold 5 and the liquid channel may be detachably connected by a screw connection, a snap connection, or the like.
The included angle between the axis of the liquid channel and the central line of the second container 4 is set to be 30-90 degrees, so that the simulated crack interface and the crack plate mold 5 can simulate cracks under all conditions, the requirement of experimental data accumulation is met, and the experimental device can simulate the pressure bearing capacity of temporary plugging agents in the cracks at different angles.
Further, the second container 4 is vertically arranged and used for simulating a vertical oil and gas well in a real environment, and the position where the second container 4 is communicated with the second chamber 21 is positioned at the top of the second container 4. The condition that receives pressure in the exploitation process is received in order to satisfy the oil gas well, and pressure is from last the condition of exerting pressure extremely down promptly, makes the second container 4 of temporary plugging agent crack shutoff pressure-bearing experimental apparatus laminate the user state of oil gas well more, has avoided because of the different experimental error that cause of pressure direction. Wherein the second container 4 is connected with the second chamber 21 through a pipeline with pressure resistance, and the joint is sealed.
In the embodiment, the included angle range between the axis of the liquid channel and the central line of the second container 4 is set to be 30-90 degrees, so that the crack with different included angles between the bottom of the simulated oil-gas well and the bottom of the well can be met, the requirement of experimental data accumulation is met, and the experimental device can evaluate the plugging and pressure-bearing capacity of the temporary plugging agent on the crack in different angles. Meanwhile, the second container 4 is placed vertically, and the second container 4 is positioned at the top of the second container 4 where it communicates with the second chamber 21. The pressure of the oil-gas well in the real environment is more fit, and errors caused by different pressure directions in the experiment process are avoided.
Example four
Fig. 4 is a schematic structural diagram of a temporary plugging agent crack plugging pressure-bearing experimental apparatus provided in an embodiment of the present invention, and as shown in fig. 4, on the basis of the above embodiment, the apparatus further includes a stirring assembly 8, and a stirring end of the stirring assembly 8 extends into the second container 4.
In some possible implementations, the stirring assembly 8 may take a variety of configurations. Illustratively, the stirring assembly 8 is composed of a motor 81, a connecting rod 82 and a blade 83, one end of the connecting rod 82 is fixedly connected with the shaft of the motor 81, the other end of the connecting rod 82 is connected with the midpoint of the blade 83, the connecting rod 82 and the blade 83 are driven to rotate synchronously by the rotation of the shaft of the motor 81, the motor 81 is fixedly connected with the top wall of the second container 4, the blade 83 is positioned inside the second container 4 as a stirring end, the position of the blade 83 is closer to the bottom of the second container 4 than the simulated hole, which is an optimal arrangement mode, at this time, when the motor 81 drives the blade 83 to rotate, the fracturing base fluid and the temporary plugging agent can be mixed to the maximum extent, or, the motor 81 is connected with the side wall of the second container 4, the connecting rod 82 is horizontally arranged in the second container 4, the blade 83 rotates in the vertical direction in the second container 4 as a stirring end, and the arrangement mode and the position of the stirring assembly 8 are not limited in this embodiment, optionally, the stirring subassembly is non-magnetic suspension formula stirring subassembly to reduce the risk of punchhole jam, as long as this setting mode can satisfy with the position can with the stifled agent of temporary plugging and fracturing base fluid intensive mixing can.
In the practical production process, the temporary plugging agent and the fracturing base fluid are fully mixed and then injected into the oil-gas well, in the pressure-bearing experimental device for plugging the perforation hole of the temporary plugging agent, because the temporary plugging agent in the second container 4 is filamentous solid, the fracturing base fluid in the second chamber 21 is a liquid, and the piston 22 moves upwards in the process of pressurizing the first container 2 by the pressure pump 1, the fracturing base fluid in the second chamber 21 is pushed to the second container 4, so that the fracturing base fluid and the temporary plugging agent are mixed. Through the stirring of stirring subassembly 8, make fracturing base fluid and temporary plugging agent intensive mixing, can avoid temporary plugging agent deposit to lead to the experimental result to appear the deviation.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a temporary plugging agent crack plugging pressure-bearing experimental apparatus provided in an embodiment of the present invention, and as shown in fig. 5, on the basis of the above embodiment, the apparatus further includes an incubator 9 with adjustable temperature, and the second container 4 and the seam plate mold 5 are located in the incubator 9. Wherein the incubator 9 is capable of providing a temperature of the second container 4 and the slot plate mold 5.
It will be appreciated that the incubator 9 provides a constant temperature environment for the second container 4 and the slot die 5, for example, the incubator 9 provides a working temperature close to that of a normal use of an oil and gas well, and thus can simulate the ambient temperature when a temporary plugging agent is used to plug a slot. The experimental error caused by temperature factors is avoided, and the experimental result is more suitable for the effect of plugging the crack by the temporary plugging agent in the oil-gas well.
It should be noted that the oven 9 may be configured as an oven 9 body with adjustable temperature, and may be a heating oven using air as a medium, or the oven 9 may be a heating oven using liquid as a medium. Wherein, the rate of heating is faster when adopting the air to be heating medium, and the heat preservation effect is better when adopting liquid to be heating medium, does not do the restriction to heating medium this embodiment, sets thermostat 9 to the 9 bodies of temperature adjustable, can obtain the shutoff bearing capacity of stifled agent in the crack temporarily under different temperatures through the temperature of adjusting thermostat 9, makes the experimental result more comprehensive.
In this embodiment, arrange second container 4 and seam board mould 5 in temperature adjustable thermostated container 9, make second container 4 when the simulation oil gas well, the simulation crack interface of second container 4 bottom simulates the crack of oil gas well bottom together with seam board mould 5, thermostated container 9 provides the production temperature that is closer to the oil gas well in the use for second container 4 and seam board mould 5, the experimental error of having avoided causing because of temperature factor, the experiment is laminated under the true condition more temporarily stifled agent to the shutoff pressure-bearing effect in crack, make the experimental result more accurate.
EXAMPLE six
Fig. 6 is a schematic structural diagram of a temporary plugging agent crack sealing and pressure-bearing experimental apparatus provided in an embodiment of the present invention, and fig. 7 is a schematic structural diagram of a filling opening and a cover body on a second container in the temporary plugging agent crack sealing and pressure-bearing experimental apparatus provided in an embodiment of the present invention, as shown in fig. 6 to 7, on the basis of the above embodiment, the temporary plugging agent crack sealing and pressure-bearing experimental apparatus further includes a third container and a weighing member 10 for weighing the third container.
The third container is provided with a vent hole, and the third container is communicated with the small-diameter end of the liquid channel.
Illustratively, the third container and the small-diameter end of the liquid channel can be connected through a pipeline with pressure resistance, and it should be understood that the connection can adopt various connection modes, such as threaded connection, and the connection needs to be sealed to ensure the air tightness of the experimental device. It should be noted that the valve 6 is located in the middle of the anti-pressure pipeline, and whether the anti-pressure pipeline is communicated or not can be controlled by controlling the opening and closing state of the valve 6.
It should be noted that the third container may play a role in pressure release protection, the air pressure inside and outside the third container is the same through the vent holes on the third container, and the vent holes may be located on the top wall of the third container, or the vent holes are located on the side wall of the third container, the number of the vent holes is at least one, and the present embodiment is not limited to the positions and the number of the vent holes, as long as the vent holes are sufficient to communicate the third container with the outside air.
The weighing member 10 is located at the bottom of the third container, and can support the third container while measuring the mass change of the third container, and the weighing member 10 can use various elements to measure the third container, for example, an electronic scale can be used to weigh the third container, and the specific form of the weighing member 10 is not limited herein in this embodiment.
The third container can accept the mixture of fracturing base fluid and temporary plugging agent that comes from 5 dischargements of crack board mould simultaneously to utilize the weight piece 10 to weigh the mass change of third container, obtain the quality of 5 dischargements of crack board mould fracturing base fluid and temporary plugging agent through the mass change of third container, like this at the experimentation, can obtain the data of the quality of 5 dischargements of crack board mould fracturing base fluid and temporary plugging agent mixture, make the experimental result more accurate comprehensive.
Furthermore, the second container 4 and the second chamber 21 are both provided with a filling port 11, the temporary plugging agent is added into the second container 4 through the filling port 11 on the second container 4, and the fracturing base fluid is added into the second chamber 21 through the filling port 11 on the second chamber 21. Or, the second chamber 21 is provided with a filling opening 11, before the experimental device is connected, a sufficient amount of temporary plugging agent is added in advance into the second container 4, a proper amount of fracturing base fluid is added into the second chamber 21, and in the experimental process, the fracturing base fluid can be added into the second chamber 21 through the filling opening 11 on the second chamber 21. Or, a filling opening 11 is arranged on the second container 4, a sufficient amount of fracturing base fluid is added into the second chamber 21 before the experimental device is connected, a proper amount of temporary plugging agent is added into the second container 4, and the temporary plugging agent can be added into the second container 4 through the filling opening 11 on the second container 4 in the experimental process. Note that a lid body 12 is provided on the filler opening 11 for sealing the filler opening 11. The cover 12 is used to prevent gas from overflowing from the filling opening 11, and it should be noted that the cover 12 and the first container 2 and the cover 12 and the second container 4 are detachably connected, for example, by a key, a thread, etc., and it is necessary to ensure the airtightness between the cover 12 and the first container 2 or between the cover 12 and the second container 4.
In this embodiment, be provided with the third container and carry out the piece 10 of weighing that weighs to the third container, the third container not only can play pressure protection's effect, and simultaneously, the third container can receive from the mixture of 6 discharged fracturing base fluids of valve and temporary plugging agent, the piece 10 of weighing measures the mass change of third container, thereby measure the mixture of temporary plugging agent and the fracturing base fluid that flows into in the third container, the data that makes the experiment reachd is more accurate comprehensive, and simultaneously, be equipped with filling opening 11 on second cavity or on second container 4, make things convenient for at any time to add fracturing base fluid in the second cavity among the experimentation, and to adding temporary plugging agent in the second container 4. The cover body 12 is used for sealing the liquid adding opening 11, and the air tightness of the experimental device is guaranteed.
In the experimentation, at first, it is complete to assemble the pressure-bearing experimental apparatus of stifled agent crack shutoff temporarily, add the stifled agent temporarily before the equipment is complete in second container 4, add fracturing base fluid in the second cavity 21, and detect the gas tightness, connect power with force (forcing) pump 1 and stirring subassembly 8 simultaneously, close valve 6, the preparation work before the completion experiment, start stirring subassembly 8, set thermostat 9 to open after the predetermined temperature, wherein, the temperature of thermostat 9 predetermined temperature for simulating the temperature of oil gas well during operation.
Finally, after the pressure pump 1 is set to the output pressure to be tested, the pressure pump 1 is started, after the value displayed by the pressure detection element 3 is increased to the required pressure, the valve 6 is opened, the pressure output by the pressure pump 1 is kept at a constant value, the readings of the pressure detection element 3 and the weighing element 10 are recorded, and the readings of the pressure detection element and the weighing element 10 can be used as the data of the test.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a pressure-bearing experimental apparatus of temporary plugging agent crack shutoff which characterized in that, includes force (forcing) pump, first container, second container, seam board mould, pressure detection component and valve:
a piston is arranged in the first container, the piston divides the first container into a first chamber and a second chamber which are independent, the first chamber is used for containing fluid media, and the second chamber is used for containing fracturing base fluid;
the pressure pump is communicated with the first chamber, the second container is communicated with the second chamber, and the second container is used for containing a temporary plugging agent; the pressurizing pump is used for providing pressure to the first chamber so as to drive the piston to press the fracturing base fluid into the second container from the second chamber;
a simulated crack interface is formed at the bottom of the second container;
the slit plate die is arranged at the simulated crack interface, a wedge-shaped liquid channel is arranged inside the slit plate die, the large-diameter end of the liquid channel is communicated with the simulated crack interface, and the small-diameter end of the liquid channel is connected with the valve;
the pressure sensing element is in communication with the second chamber for monitoring the pressure of the second chamber.
2. The experimental apparatus for temporary plugging agent crack sealing and pressure bearing according to claim 1, further comprising an interface sleeve, wherein the simulated crack interface is formed in the interface sleeve, and the seam plate mold is fastened and connected with the interface sleeve.
3. The experimental apparatus for temporary plugging agent fracture plugging and pressure bearing according to claim 2, wherein the number of the interface sleeves is plural, the cross-sectional area of the simulated fracture interface formed in each interface sleeve is different, and the interface sleeves are installed at the connection ports in a replaceable manner.
4. The temporary plugging agent crack sealing and pressure-bearing experimental device according to claim 1, wherein an included angle between an axis of the liquid channel and a center line of the second container ranges from 30 degrees to 90 degrees.
5. The temporary plugging agent crack sealing and pressure-bearing experimental device as claimed in claim 1, wherein the second container is vertically placed, and the position where the second container is communicated with the second chamber is located at the top of the second container.
6. The experimental apparatus for temporary plugging agent crack sealing and pressure bearing according to any one of claims 1-5, further comprising a stirring component, wherein a stirring end of the stirring component extends into the second container.
7. The experimental device for temporary plugging agent crack sealing and pressure bearing according to any one of claims 1-5, further comprising a thermostat with adjustable temperature, wherein the second container and the slit plate mold are positioned in the thermostat.
8. The experimental apparatus for temporary plugging agent crack sealing and pressure bearing according to any one of claims 1-5, wherein the pressure detecting element is a pressure gauge or a pressure sensor.
9. The temporary plugging agent crack sealing and pressure-bearing experimental device according to any one of claims 1-5, further comprising a third container and a weighing member for weighing the third container;
the third container is provided with a vent, and the third container is communicated with the small-diameter end of the liquid channel.
10. The temporary plugging agent crack sealing and pressure-bearing experimental device according to claim 1, wherein a liquid filling opening is arranged on the second cavity and/or the second container, and a cover body is arranged on the liquid filling opening and used for sealing the liquid filling opening.
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| CN202010253841.9A CN113494262A (en) | 2020-04-02 | 2020-04-02 | Temporary plugging agent crack plugging and bearing experimental device |
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| CN202010253841.9A CN113494262A (en) | 2020-04-02 | 2020-04-02 | Temporary plugging agent crack plugging and bearing experimental device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992476A (en) * | 2022-06-07 | 2022-09-02 | 中国石油天然气集团有限公司 | Shaft angle adjusting frame and shaft temporary plugging simulation device |
| CN114992476B (en) * | 2022-06-07 | 2024-05-31 | 中国石油天然气集团有限公司 | Shaft angle adjusting frame and shaft temporary blocking simulation device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914494A (en) * | 2012-11-03 | 2013-02-06 | 中国石油大学(华东) | Device for measuring dynamic leak-off of foam fracturing fluid and working method thereof |
| CN204495654U (en) * | 2015-02-05 | 2015-07-22 | 中国石油化工股份有限公司 | A kind of stifled strength testing device temporarily |
| US20170211373A1 (en) * | 2016-01-21 | 2017-07-27 | Step Energy Services Ltd. | Method and apparatus for selecting diversion material for a wellbore operation |
| CN107202866A (en) * | 2017-06-13 | 2017-09-26 | 北京大学 | A kind of diverting agent temporarily blocks up henchnmrk test device and its method of work and application |
| CN107288603A (en) * | 2017-06-13 | 2017-10-24 | 北京大学 | A kind of experimental provision of simulation fracture turnaround fracture and its application |
| CN107976520A (en) * | 2017-12-08 | 2018-05-01 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Nearly well band temporarily blocks up simulating lab test device and method |
| CN108104789A (en) * | 2018-01-31 | 2018-06-01 | 西南石油大学 | A kind of adjustable temporarily stifled acid fracturing steering behaviour test device in crack and evaluation method |
| CN109630084A (en) * | 2018-12-03 | 2019-04-16 | 中国石油集团川庆钻探工程有限公司 | A kind of pulsating load temporarily blocks up fracture simulation apparatus and method |
| CN110359876A (en) * | 2019-07-16 | 2019-10-22 | 西南石油大学 | Simulating-estimating device integrated with acidification de-plugging and method are temporarily blocked up in crack |
| CN110500076A (en) * | 2019-07-16 | 2019-11-26 | 李新勇 | It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture |
-
2020
- 2020-04-02 CN CN202010253841.9A patent/CN113494262A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914494A (en) * | 2012-11-03 | 2013-02-06 | 中国石油大学(华东) | Device for measuring dynamic leak-off of foam fracturing fluid and working method thereof |
| CN204495654U (en) * | 2015-02-05 | 2015-07-22 | 中国石油化工股份有限公司 | A kind of stifled strength testing device temporarily |
| US20170211373A1 (en) * | 2016-01-21 | 2017-07-27 | Step Energy Services Ltd. | Method and apparatus for selecting diversion material for a wellbore operation |
| CN107202866A (en) * | 2017-06-13 | 2017-09-26 | 北京大学 | A kind of diverting agent temporarily blocks up henchnmrk test device and its method of work and application |
| CN107288603A (en) * | 2017-06-13 | 2017-10-24 | 北京大学 | A kind of experimental provision of simulation fracture turnaround fracture and its application |
| CN107976520A (en) * | 2017-12-08 | 2018-05-01 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Nearly well band temporarily blocks up simulating lab test device and method |
| CN108104789A (en) * | 2018-01-31 | 2018-06-01 | 西南石油大学 | A kind of adjustable temporarily stifled acid fracturing steering behaviour test device in crack and evaluation method |
| CN109630084A (en) * | 2018-12-03 | 2019-04-16 | 中国石油集团川庆钻探工程有限公司 | A kind of pulsating load temporarily blocks up fracture simulation apparatus and method |
| CN110359876A (en) * | 2019-07-16 | 2019-10-22 | 西南石油大学 | Simulating-estimating device integrated with acidification de-plugging and method are temporarily blocked up in crack |
| CN110500076A (en) * | 2019-07-16 | 2019-11-26 | 李新勇 | It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992476A (en) * | 2022-06-07 | 2022-09-02 | 中国石油天然气集团有限公司 | Shaft angle adjusting frame and shaft temporary plugging simulation device |
| CN114992476B (en) * | 2022-06-07 | 2024-05-31 | 中国石油天然气集团有限公司 | Shaft angle adjusting frame and shaft temporary blocking simulation device |
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