JP2017218728A - Bubble injection system, bubble injection method and method for producing bubble injection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bubble injection system and a bubble injection method which enables bubbles to be easily pressed into a reservoir of hydrocarbon; and a method for producing the bubble injection system.SOLUTION: A bubble injection system S comprises a liquid flow passage 512 for forcibly sending a liquid L to be mixed with a gas fluid, to a first position in the neighborhood of a reservoir R, a gas flow passage 513 for forcibly sending the gas fluid to a second position in the neighborhood of the reservoir R, a shearing member 514 that generates bubbles in the liquid L forcibly sent by the liquid flow passage 512 by making the gas fluid forcibly sent by the gas flow passage 513 pass through and shearing the gas fluid by pores, and an injection part 515 for injecting bubbles generated in the liquid L into the reservoir R together with the liquid L.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bubble injection system, a bubble injection method, and a method for manufacturing a bubble injection system for injecting bubbles into a reservoir of hydrocarbon stored underground.

  As a method for increasing the hydrocarbon recovery efficiency in an oil and gas field, a micro bubble injection method for recovering hydrocarbons by pressing micro bubbles into an oil gas layer is known. Patent Document 1 discloses a crude oil recovery method in which microbubbles generated by mixing gas and water are injected into an oil layer, and the oil components expelled by the microbubbles are recovered. Patent Documents 2 to 4 disclose a method of generating microbubbles in salt water by passing carbon dioxide and a gas containing carbon dioxide through a filter made of a porous substance.

JP 2008-19644 A Japanese Patent No. 5315346 Japanese Patent No. 5380463 Japanese Patent No. 5399436

  In the technique disclosed in Patent Literature 1, microbubbles are generated by mixing an injection gas with injection water in the vicinity of the ground surface, and the generated microbubbles are injected from the injection well. The microbubbles injected into the injection well move through the injection well over a long distance and reach the vicinity of the reservoir. However, when the microbubbles generated near the ground surface are pressed into the reservoir, if the pressure near the reservoir is higher than the pressure near the ground, the microbubbles are re-dissolved in water, There was a problem that some would disappear.

  On the other hand, in Patent Documents 2 to 4, only a gas or a supercritical fluid is sent to the underground using a pipe constituting a well wall called a so-called casing as a flow path, and in close contact with the oil layer at the bottom. A technique for press-fitting microbubble-like carbon dioxide into an oil layer with a filter is disclosed. In this technology, it is possible to generate bubbles in the formation water in the oil reservoir in the initial stage of press-fitting, but eventually all formation water near the well will be replaced with gas, so microbubbles may be generated. There was a problem that it was impossible.

  Therefore, the present invention has been made in view of the above-described points, and provides a bubble injection system, a bubble injection method, and a method for manufacturing a bubble injection system capable of continuously injecting bubbles into a hydrocarbon reservoir. For the purpose.

  In the first aspect of the present invention, there is provided a bubble injection system for injecting a liquid containing bubbles generated based on a gas fluid, which is a fluid containing a gas component, into a hydrocarbon reservoir, and in the vicinity of the reservoir. A liquid flow path for pumping a liquid mixed with the gas fluid to a first position, a gas flow path for pumping the gas fluid to a second position near the reservoir, and a pressure flow by the gas flow path A shearing member that generates bubbles in the liquid pumped by the liquid flow path by passing the gas fluid and shearing the gas fluid by pores, and bubbles generated in the liquid together with the liquid A bubble injection system comprising: an injection unit for injecting into the reservoir. The shear member is a porous member that generates the bubbles having a particle size of, for example, 100 μm or less.

  The bubble injection system may further include a storage unit that stores the gas flow channel and the liquid flow channel, and the injection unit may be formed at a position corresponding to a depth of the storage layer in the storage unit. . The gas flow path may be provided inside the liquid flow path.

  The shearing member may have a columnar shape with an outer diameter smaller than the inner diameter of the cylindrical gas flow path, and may be connected in close contact with the gas flow path inside the gas flow path.

  The cylindrical gas flow path is coaxially provided inside the cylindrical liquid flow path, and the shearing member has a cylindrical shape with an outer diameter smaller than the inner diameter of the liquid flow path. The liquid channel may be connected in close contact with the liquid channel.

The cylindrical liquid channel is accommodated in a cylindrical container having an inner diameter larger than the outer diameter of the liquid channel, and the inner wall of the container and the liquid flow at a position higher than the reservoir A blocking portion provided between the outer wall of the road and blocking the bubble from rising may further be provided.
In this case, a region deeper than the blocking portion in the housing portion may be formed of a corrosion-resistant material.

  The bubble injection system may further include a fixing unit that connects the inner wall of the liquid channel and the outer wall of the gas channel, and fixes the position of the gas channel. The liquid channel may be formed of a corrosion-resistant member.

  The gas flow channel and the liquid flow channel have a cylindrical shape, and are arranged in parallel with a cylindrical housing portion having an inner diameter larger than the total length of the outer diameter of the gas flow channel and the outer diameter of the liquid flow channel. The gas flow path may pump the gas fluid to the second position deeper than the first position where the liquid flow path pumps the liquid.

  The bubble injection system may further include a blocking unit that is provided between the storage unit, the gas channel, and the liquid channel at a position higher than the reservoir, and prevents the bubble from rising. .

The bubble injection system further includes a solution manufacturing unit that manufactures the liquid by mixing a liquid containing salt and a surfactant, and the liquid flow path pumps the liquid manufactured by the solution manufacturing unit. May be.
The solution manufacturing unit may control the amount of the surfactant to be mixed with the salt-containing liquid based on the generation state of the bubbles.

The bubble injection system may further include a press-fitting control unit that controls the amount of the liquid that pumps the liquid flow path and the amount of the gas fluid that pumps the gas flow path.
The press-fitting control unit may press-fit the gas fluid into the gas flow path at a pressure equal to or higher than a critical pressure. The press-fitting control unit may have a pressure resistance higher than an internal pressure of the gas flow path.

  According to a second aspect of the present invention, there is provided a bubble injection method for injecting a liquid containing bubbles generated based on a gas fluid, which is a fluid containing a gas component, into a hydrocarbon reservoir, and in the vicinity of the reservoir. A step of pumping a liquid mixed with the gas fluid to a first position; a step of pumping the gas fluid to a second position near the reservoir; and the gas fluid pumped to the second position. Generating a bubble in the liquid pumped to the first position by shearing through a shearing member having pores, and injecting the bubble generated in the liquid into the reservoir together with the liquid There is provided a bubble injection method characterized by comprising the steps of:

  In a third aspect of the present invention, there is provided a method for manufacturing a bubble injection system for injecting a liquid containing bubbles generated based on a gas fluid, which is a fluid containing a gas component, into a hydrocarbon reservoir. Installing the liquid flow path for pumping the liquid mixed with the gas fluid so as to reach the first position in the vicinity of the gas fluid, and the gas fluid so as to reach the second position in the vicinity of the reservoir. A gas flow path for pumping the gas, and passing the gas fluid pumped by the gas flow path inside the gas flow path for pumping the gas fluid, and shearing the gas fluid by the pores And a step of fixing a shearing member for generating bubbles in the liquid pumped by the liquid flow path. A method for manufacturing a bubble injection system is provided.

  You may have the process of installing the accommodating part which accommodates the said liquid flow path and the said gas flow path before the process of installing the said liquid flow path and the process of installing the said gas flow path.

  According to the present invention, there is an effect that bubbles can be continuously pressed into a hydrocarbon reservoir.

It is a figure for demonstrating the outline | summary of a bubble injection | pouring system. It is a lineblock diagram of the bubble injection system concerning a 1st embodiment. It is a block diagram of the bubble injection system which concerns on 2nd Embodiment. It is a block diagram of the bubble injection system which concerns on 3rd Embodiment. It is a block diagram of the bubble injection system which concerns on 4th Embodiment. It is a block diagram of the bubble injection system which concerns on 5th Embodiment.

[Outline of this embodiment]
FIG. 1 is a diagram for explaining an outline of the bubble injection system S. The bubble injection system S is a system that generates microbubbles based on the gas G and injects the generated microbubbles into the hydrocarbon reservoir R. Microbubbles are bubbles having a particle size of 100 μm or less. However, the bubble injection system S may generate bubbles having a particle size larger than 100 μm. The bubble injection system S simultaneously pumps the gas G and the liquid L deeply in the well through separate flow paths, generates microbubbles based on the gas G in the vicinity of the underground reservoir R, and stores the reservoir R It is characterized by injecting microbubbles.

The gas G is a gas fluid containing a gas component, and is used for generating microbubbles. The gas G is accommodated in a gas filling container (not shown). The gas G is, for example, carbon dioxide (CO ₂ ), nitrogen (N ₂ ), hydrocarbon or the like. The liquid L is a liquid mixed with the gas G, and microbubbles based on the gas G are generated in the liquid L.

  The reservoir R is a layer that contains a lot of hydrocarbons such as oil and natural gas in the ground, and is present in the vicinity of several hundred meters to several thousand meters, for example. Oil and natural gas can be taken by injecting microbubbles generated by the bubble injection system S into the reservoir R and expelling oil and natural gas in the reservoir R with microbubbles.

  The bubble injection system S includes a gas pipe 1, a water treatment facility 2, a liquid pipe 3, a flow rate control device 4, and a press-fit well 5. The gas pipe 1, the water treatment facility 2, the liquid pipe 3, and the flow rate control device 4 are installed on the ground, and the injection well 5 is installed on the underground. In the present specification, the ground is a region above the ground or the bottom of the sea and includes the sea. The underground is an area below the ground or the sea floor.

  FIG. 1 shows an example in which a gas pipe 1, a water treatment facility 2, a liquid pipe 3, and a flow rate control device 4 are installed on the land, and the injection well 5 extends from the land to a position deeper than the underground reservoir R. Is shown. On the other hand, even if the gas pipe 1, the water treatment facility 2, the liquid pipe 3, and the flow rate control device 4 are installed on the sea and the injection well 5 extends to a position deeper than the reservoir R through the sea. Good.

  The gas pipe 1 is connected to the flow rate control device 4 for transporting the gas G from a gas filling container (not shown) containing the gas G to be introduced near the reservoir R to the flow rate control device 4. The tube.

  The water treatment facility 2 is a solution manufacturing section that manufactures a liquid L that is installed on the ground and that is to be introduced near the reservoir R. The water treatment facility 2 produces a liquid L by mixing a salt-containing liquid and a surfactant. For example, the water treatment facility 2 generates liquid L by treating accompanying water including formation water that is produced as a secondary product with the production of oil and gas. In the water treatment facility 2, treatment of accompanying water such as adjustment of salt concentration, removal of impurities, addition of a surfactant, and the like is performed. The water treatment facility 2 can generate a liquid L that is more likely to generate microbubbles by adding a surfactant to the accompanying water containing salt.

  Note that the water treatment facility 2 may add an appropriate amount of salt so that the liquid L has a salt concentration suitable for generation of microbubbles. For example, the water treatment facility 2 generates a liquid L having a salt concentration suitable for generation of microbubbles by adding an amount of salt determined based on the measurement result of the salinity of the accompanying water. Further, the water treatment facility 2 may control the amount of the surfactant to be mixed with the liquid containing salt based on the generation state of the microbubbles.

  The liquid pipe 3 is a pipe that is disposed between the water treatment facility 2 and the flow rate control device 4 and transports the liquid L from the water treatment facility 2 to the flow rate control device 4. The flow rate control device 4 is installed between the gas pipe 1 and the liquid pipe 3, controls the flow rate of the gas G and liquid L to be pumped into the press-fit well 5, and pumps the gas G and liquid L into the press-fit well 5. Wellhead. Details of the configuration of the flow control device 4 will be described later.

  The injection well 5 is a well for pumping the gas G and the liquid L to the vicinity of the reservoir R. The injection well 5 is connected to the flow control device 4 and is provided to extend from the flow control device 4 to a position deeper than the reservoir R. The press-fit well 5 includes a housing part 501, a shearing member 502, and an injection part 503.

  The accommodating part 501 is a casing pipe for preventing the fluid in the formation from entering the well. The accommodating portion 501 is a cylindrical metal pipe that is connected to the flow rate control device 4 and buried from the ground to the deep underground, and has a bottom that reaches a position deeper than the reservoir R. Inside the accommodating portion 501, a gas flow path for pumping the gas G to the vicinity of the storage layer R and a liquid flow path for pumping the liquid L to the vicinity of the storage layer R are provided. Details of these gas flow path and liquid flow path will be described later.

  The shearing member 502 has a function of generating microbubbles, and is provided in the vicinity of the storage layer R in the housing portion 501. The shear member 502 shears the gas G fed from the flow control device 4 to the vicinity of the reservoir R. When the sheared gas G is mixed with the liquid L, microbubbles are generated.

  The injection unit 503 has a plurality of openings for injecting the microbubbles generated by the shearing member 502 into the storage layer R together with the liquid L. The microbubbles generated by the shearing member 502 can be injected into the reservoir layer R by keeping the pressure in the accommodating portion 501 higher than the pressure in the reservoir layer R.

The injection part 503 is formed on the outer wall at a position corresponding to the depth of the reservoir R in the accommodating part 501. The position corresponding to the depth of the reservoir R is a position including a position between the shallowest position and the deepest position of the reservoir R. For example, the injection part 503 may cover all between the shallowest position and the deepest position of the reservoir R. The injection part 503 may cover only a part between the shallowest position and the deepest position of the reservoir R. The injection part 503 is formed, for example, by blasting explosives installed at a position in contact with the storage layer R of the storage part 501.
Hereinafter, various embodiments of the bubble injection system S will be described in detail.

<First Embodiment>
[Configuration of Bubble Injection System S1 According to First Embodiment]
FIG. 2A is a configuration diagram of the bubble injection system S1 according to the first embodiment. FIG. 2B is a cross-sectional view taken along line XX in FIG. The hatched lines in FIG. 2 indicate the region where the liquid L is being pumped.

  The bubble injection system S <b> 1 according to the first embodiment includes a gas pipe 1, a water treatment facility 2, a liquid pipe 3, a flow rate control device 4, and a press-fit well 51. The flow control device 4 includes a connection portion 41 and valves 42a to 42e. The valves 42 a to 42 e are valves for adjusting the flow rates of the gas G and the liquid L that are pumped into the press-fit well 51. The connection part 41 has a pipe for connecting the gas pipe 1 and the gas flow path 513 and connecting the liquid pipe 3 and the liquid flow path 512, and is connected to the valves 42a, 42b, 42c, and 42d. Has been. For example, the connecting portion 41 pressure-feeds the liquid L flowing in through the valve 42b to the liquid flow path 512 described later through the valves 42d and 42e, and sends the gas G flowing in through the valve 42a to the valves 42d and 42e. Through the gas passage 513 to be described later.

  The valve 42a is, for example, a gas press-fitting control unit that controls the flow rate when the gas G is pumped to the gas flow path 513 by changing the opening degree based on control from a computer (not shown) installed in the control room. Function as. Further, the valve 42b functions as a liquid press-fitting control unit that controls the flow rate when the liquid L is pumped into the liquid flow path 512 by changing the opening degree based on control from a computer installed in the control room. Note that devices other than the valve 42a and the valve 42b may operate as the gas injection control unit and the hydraulic injection control unit.

  The press-fit well 51 includes a storage part 511, a liquid flow path 512, a gas flow path 513, a shear member 514, an injection part 515, and a blocking part 516. The housing part 511 has the same configuration as the housing part 501. The accommodating part 511 has an inner diameter larger than the outer diameter of the liquid channel 512 and the outer diameter of the gas channel 513, and accommodates the liquid channel 512 and the gas channel 513.

  The liquid flow path 512 is a cylindrical metal tube for pumping the liquid L mixed with the gas G to the first position in the vicinity of the reservoir R. The first position is, for example, a position deeper than a position 100 m shallower than the shallowest position of the reservoir R and shallower than a position 100 m deeper than the deepest position of the reservoir R. The first position is preferably a position deeper than the shallowest position of the reservoir R, and more preferably a position deeper than the deepest position of the reservoir R. The first position may be a position between the shallowest position and the deepest position of the reservoir R. The first position is a position deeper than at least the intermediate position of the injection well 51.

The first position is a position where the gas G fed from the flow rate control device 4 is equal to or higher than the critical pressure. The critical pressure is the lowest pressure required to make a gas liquid at a critical temperature. The critical temperature is the highest temperature that can be achieved by applying pressure to a gas to form a liquid. For example, the critical temperature of carbon dioxide (CO ₂ ) is 31.1 ° C., and the critical pressure is 7.39 MPa.

  The gas flow path 513 is a cylindrical metal pipe for pumping the gas G to the second position near the reservoir R. Similarly to the first position, the second position is, for example, a position deeper than the shallowest position of the reservoir R by 100 m and a position shallower than the deepest position of the reservoir R by 100 m. The second position is preferably a position deeper than the shallowest position of the reservoir R, and more preferably a position deeper than the deepest position of the reservoir R. The second position may be a position between the shallowest position and the deepest position of the reservoir R. The second position is a position deeper than at least the intermediate position of the injection well 51.

  The second position is also a position where the gas G fed from the flow rate control device 4 becomes equal to or higher than the critical pressure. The gas flow path 513 has an outer diameter smaller than the inner diameter of the liquid flow path 512 and is coaxially provided inside the liquid flow path 512 so that the central axis coincides with the central axis of the liquid flow path 512. Yes.

  In the example shown in FIG. 2, the second position where the gas G is pumped is deeper than the first position where the liquid L is pumped, but the relationship between the first position and the second position is Not limited to this. The first position and the second position may be the same position. Since the liquid channel 512 and the gas channel 513 are extended to a position near the reservoir R, the microbubbles generated by mixing the liquid L and the gas G do not disappear in the reservoir R. Since it is injected, it is possible to efficiently inject microbubbles into the reservoir R.

  The amount of the liquid L pumped by the liquid channel 512 and the amount of the gas G pumped by the gas channel 513 are controlled by changing, for example, the opening of the valve 42a by a computer in the control chamber. The connecting portion 41 presses the gas G into the gas flow path 513 with a pressure equal to or higher than the critical pressure. Therefore, the connection part 41 has a pressure | voltage resistant structure higher than the internal pressure of the gas flow path 513. FIG.

  The shear member 514 is a porous member having a large number of pores, for example, a porous filter. The shear member 514 has such pores to generate bubbles having a particle size of 100 μm or less. Further, the shear member 514 has a cylindrical shape with an outer diameter smaller than the inner diameter of the liquid channel 512 and is connected in close contact with the liquid channel 512 inside the tip of the liquid channel 512.

  When the gas G pumped by the gas flow path 513 is released from the tip of the gas flow path 513, it passes through the shearing member 514 so as to push out the liquid L pumped by the liquid flow path 512. The shearing member 514 generates microbubbles by shearing the gas G and the liquid L through the pores.

  The injection unit 515 has the same configuration as the injection unit 503. The microbubbles generated by passing through the shearing member 514 float up to the position of the injection portion 515 and enter the storage layer R.

  The blocking part 516 is provided between the inner wall of the accommodating part 511 and the outer wall of the liquid flow path 512 at a position higher than the reservoir layer R, and the microbubbles generated by the shearing member 514 and the liquid L are mixed. The fluid is prevented from rising between the inner wall of the storage portion 511 and the outer wall of the liquid flow path 512. The blocking unit 516 is, for example, a hard rubber packer (packing device), and closes the space between the inner wall of the storage unit 511 and the outer wall of the liquid channel 512.

  Since the space between the outer diameter of the liquid flow path 512 and the inner diameter of the accommodating portion 511 is vertically divided by the blocking portion 516, mixed water of microbubbles and liquid L is placed on the upper portion of the blocking portion 516. Since the contained carbonated water does not enter, it is possible to prevent the inner wall of the accommodating portion 511 at the upper portion of the blocking portion 516 from being corroded. Moreover, the area | region of the lower part of the prevention part 516 in the accommodating part 511 may be formed with the corrosion-resistant material.

[Bubble injection method]
Hereinafter, a method for injecting microbubbles will be described.
First, the flow rate control device 4 pumps the liquid L mixed with the gas G to a first position in the ground deeper than the position where the gas G becomes the critical pressure or higher. In parallel, the flow control device 4 pumps the gas G to a second position in the ground deeper than the position where the gas G is equal to or higher than the critical pressure. While the flow control device 4 pumps the gas G, the flow control device 4 controls the pressure of the gas G to be pumped based on the pressure of the gas G in the vicinity of the reservoir R. Specifically, the flow control device 4 controls the pressure of the gas G to be pumped so as to be higher than the pressure of the gas G near the reservoir R.

  Then, the bubble injection system S generates microbubbles in the liquid L pumped to the first position by shearing the gas G pumped to the second position through the shearing member 514 having pores. The microbubbles generated in the liquid L are injected into the reservoir layer R.

[Method for Manufacturing Bubble Injection System S1]
Hereinafter, a manufacturing method of the bubble injection system S1 will be described.
First, a casing pipe serving as an accommodating portion 511 that serves as an outer wall of the press-fit well 51 is embedded in the basement. At this time, instead of newly embedding the casing pipe, the casing pipe of the well used in the past may be used as the accommodating portion 511.

  Next, a pipe that becomes the liquid flow path 512 is prepared, and a shearing member 514 is fixed to the tip of the pipe that becomes the liquid flow path 512. Further, a hard rubber to be the blocking portion 516 is fixed at a predetermined position on the outer side surface of the tube to be the liquid flow path 512. Subsequently, a pipe serving as the liquid flow path 512 is installed so as to reach the first position in the ground deeper than the position where the gas G becomes the critical pressure or higher. Next, a pipe that becomes the gas flow path 513 is prepared, and a pipe that becomes the gas flow path 513 is installed so as to reach a second position in the ground deeper than the position where the gas G becomes the critical pressure or higher. Subsequently, the hard rubber fixed to the liquid flow path 512 is expanded, so that the space between the inner wall of the housing portion 511 and the outer wall of the liquid flow path 512 is closed.

  Thereafter, the gas pipe 1, the water treatment equipment 2, the liquid pipe 3, the flow rate control device 4, etc. are installed on the land, and the liquid flow channel 512 and the gas flow channel 513 are connected to the flow rate control device 4 to inject bubbles. System S1 is completed.

[Effects of the bubble injection system S1 according to the first embodiment]
As described above, the bubble injection system S1 simultaneously pumps the gas G and the liquid L to the bottom of the press-fit well 51 through different flow paths. And the bubble injection | pouring system S1 produces | generates the carbonated water containing a microbubble by shearing the fluid which gas G and the liquid L mixed in the vicinity of the storage layer R with the shearing member 514. FIG.

  As a result, the bubble injection system S1 can stably generate microbubbles for a long period of time at the bottom of the injection well 51 without depleting water used for generating microbubbles. In addition, since the gas G and the liquid L flow separately in the press-fit well 51, carbonated water is not generated during the pressure feeding of the gas G and the liquid L. Therefore, the liquid channel 512 and the gas channel 513 are carbonated water. Will not corrode. Moreover, since the region where the carbonated water is generated by mixing the gas G and the liquid L is limited due to the provision of the blocking portion 516, most of the accommodating portion 511 is made of a material that is not corrosion resistant. Can be formed.

<Second Embodiment>
FIG. 3A is a configuration diagram of the bubble injection system S2 according to the second embodiment. FIG. 3B is a cross-sectional view taken along line XX in FIG. The hatched lines in FIG. 3 indicate the region where the liquid L is being pumped.

  The bubble injection system S2 is different from the configuration of the bubble injection system S1 in the position where the shearing member 524 is attached. The shear member 524 is a porous member having a large number of pores, similar to the shear member 514, but is different in shape and connection position from the shear member 514. Specifically, the shear member 524 has a cylindrical shape with an outer diameter smaller than the inner diameter of the gas flow path 513 and is connected in close contact with the gas flow path 513 inside the tip of the gas flow path 513. Yes.

  By setting it as such a structure, the bubble injection system S2 pumps the gas G and the liquid L simultaneously to the bottom part of the injection well 52 by a respectively different flow path similarly to the bubble injection system S1. And the bubble injection | pouring system S2 produces | generates the carbonated water containing a microbubble by making it mix with the liquid L, after shearing the gas G by the shear member 524 in the vicinity of the storage layer R. FIG.

  As a result, the bubble injection system S2 can stably generate microbubbles over a long period of time at the bottom of the injection well 52 without depleting water used for generating microbubbles. Moreover, since the gas G and the liquid L flow separately in the injection well 52, corrosion of the accommodating part 511 by carbonated water can be prevented. Furthermore, since the gas G passes through the shearing member 524 without passing through the liquid L, clogging of pores that may occur when the liquid L passes through the shearing member 524 is less likely to occur.

<Third Embodiment>
FIG. 4A is a configuration diagram of a bubble injection system S3 according to the third embodiment. FIG. 4B is a sectional view taken along line XX in FIG.
The bubble injection system S3 is different from the bubble injection system S2 in the configuration of the flow rate control device 4 and the configuration of the press-fit well 53. About the structure of the injection well 53, the accommodating part 511 is a liquid flow path, and the point by which the gas flow path 533 is provided inside the accommodating part 511 differs. Further, the press-fit well 53 is different in that a shearing member 534 is provided on the inner side of the distal end of the gas passage 533 and a fixing portion 537 is provided between the outer wall of the gas passage 533 and the inner wall of the accommodating portion 511.

  The flow control device 4 illustrated in FIG. 4A includes a connection portion 41 and valves 42a to 42f. The connection part 41 has a flow path for separately pumping the gas G and the liquid L into the press-fit well 51, and is connected to the valves 42a, 42b, 42c, and 42d. The valve 42 c is a valve for adjusting the flow rate of the gas G to be pumped into the press-fit well 53, and the valve 42 f is a valve for adjusting the flow rate of the liquid L to be pumped into the press-fit well 53.

  The gas flow path 533 is a metal cylindrical tube similarly to the gas flow path 513, but may have a diameter different from that of the gas flow path 513. For example, the gas flow path 533 may have a diameter larger than the diameter of the gas flow path 513. Then, the liquid L is pumped from the flow control device 4 between the outer wall of the gas flow path 533 and the inner wall of the housing portion 511.

  The shear member 534 is a porous member having a large number of pores, like the shear member 524, but has a cylindrical shape with an outer diameter smaller than the inner diameter of the gas flow path 533, and the tip of the gas flow path 533. Are connected in close contact with the gas flow path 533. In addition, the fixing portion 537 connects the inner wall of the housing portion 511 and the outer wall of the gas flow path 533 to fix the position of the gas flow path 533. The fixing part 537 is an anchor, for example.

  The method of manufacturing the bubble injection system S3 is different from the method of manufacturing the bubble injection system S1 in that it is not necessary to install a tube that becomes the liquid flow path 512 that was necessary when the bubble injection system S1 was manufactured. In addition, the manufacturing method of the bubble injection system S3 includes a step of connecting the gas flow path 533 and the accommodating portion 511 with the fixing portion 537 after installing the pipe to be the gas flow path 533.

  By adopting such a configuration, the bubble injection system S3 simultaneously pumps the gas G and the liquid L to the bottom of the press-fit well 53 through different flow paths, similarly to the bubble injection system S2. Then, after the gas G is sheared by the shearing member 534 in the vicinity of the reservoir R, the bubble injection system S3 mixes the sheared gas G with the liquid L, thereby generating carbonated water containing microbubbles.

  As a result, the bubble injection system S3 can stably generate microbubbles at the bottom of the press-fit well 53 for a long period of time. Further, in the bubble injection system S3, since the gas G passes through the shearing member 534 without passing the liquid L, clogging of the pores that may occur when the liquid L passes through the shearing member 534 is less likely to occur. Further, the bubble injection system S3 can pump a large volume of gas G compared to the bubble injection systems S1 and S2 by making the inner diameter of the gas flow path 533 larger than the inner diameter of the gas flow path 513. , The concentration of the generated microbubbles can be increased.

<Fourth Embodiment>
FIG. 5A is a configuration diagram of a bubble injection system S4 according to the fourth embodiment. FIG.5 (b) is XX sectional drawing of Fig.5 (a). The hatched lines in FIG. 5 indicate the region where the liquid L is being pumped.

  In the bubble injection system S4, the configuration of the flow control device 4 and the configuration of the press-fit well 54 are different from the configuration of the bubble injection system S2. Regarding the configuration of the press-fit well 54, the gas flow path 543 is not provided inside the liquid flow path 542, and the gas flow path 543 and the liquid flow path 542 are accommodated in parallel in the accommodating portion 511. The difference is that a blocking portion 546 is provided between the portion 511 and the gas flow path 543 and the liquid flow path 542.

  The flow rate control device 4 includes a connection part 41 and valves 42a to 42h. The connection part 41 has a flow path for separately pumping the gas G and the liquid L into the injection well 54, and is connected to valves 42a, 42b, 42c, 42d, 42e, and 42f. The valve 42 c is a valve for adjusting the flow rate of the gas G to be pumped into the press-fit well 53, and the valve 42 b is a valve for adjusting the flow rate of the liquid L to be pumped into the press-fit well 53.

  The liquid flow path 542 and the gas flow path 543 have a cylindrical shape made of metal, similar to the liquid flow path 512 and the gas flow path 513, and the outer diameter of the gas flow path 543 and the outer diameter of the liquid flow path 542 are determined. It is accommodated in parallel in a cylindrical accommodating portion 511 having an inner diameter larger than the combined length.

  The gas channel 543 pumps the gas G to a second position deeper than the first position where the liquid channel 542 pumps the liquid L. As in the other embodiments, the first position and the second position are deeper positions in the ground than the position where the gas G pumped from the flow control device 4 is equal to or higher than the critical pressure. In FIG. 5, the second position is deeper than the first position, but in the present embodiment, the second position may be shallower than the first position.

  The shear member 544 is a porous member having a large number of pores, similar to the shear member 524. The shear member 544 has a cylindrical shape with an outer diameter smaller than the inner diameter of the gas flow path 543 tube, and is connected in close contact with the gas flow path 543 inside the tip of the gas flow path 543.

  The blocking unit 546 is a packer similar to the blocking unit 516, and is provided between the storage unit 511, the liquid channel 542, and the gas channel 543 at a position higher than the reservoir layer R. The liquid L discharged from the liquid flow path 542 accumulates in a region deeper than the blocking portion 546, and the gas G sheared by the shearing member 544 is released into the accumulated liquid L, thereby generating microbubbles. The blocking part 546 prevents the mixed fluid of the microbubbles and the liquid L from rising between the inner wall of the storage part 511, the outer wall of the liquid channel 542, and the outer wall of the gas channel 543.

  The basic steps in the method for manufacturing the bubble injection system S4 are the same as those for the bubble injection systems S1 to S3. However, the manufacturing method of the bubble injection system S4 is different from the manufacturing method of the bubble injection systems S1 to S3 in that the order of installing the liquid channel 542 and the gas channel 543 is arbitrary.

  As described above, the bubble injection system S4 simultaneously pumps the gas G and the liquid L to the bottom of the press-fit well 54 through different flow paths, similarly to the bubble injection system S2. And the bubble injection | pouring system S4 produces | generates the carbonated water containing a microbubble by making the gas G shear by the shearing member 544 in the vicinity of the storage layer R, and then making it mix with the liquid L.

  As a result, the bubble injection system S4 can stably generate microbubbles at the bottom of the press-fit well 54 for a long period of time. Further, in the bubble injection system S4, the gas G and the liquid L flow separately in the press-fit well 54, so that corrosion of the housing portion 511 due to carbonated water can be prevented. Further, in the bubble injection system S4, since the gas G passes through the shearing member 544 without passing the liquid L, clogging of pores that may occur when the liquid L passes through the shearing member 544 is less likely to occur.

<Fifth Embodiment>
FIG. 6A is a configuration diagram of a bubble injection system S5 according to the fifth embodiment. FIG. 6B is a cross-sectional view taken along line XX of FIG. A hatched line in FIG. 6 indicates a region where the liquid L is being pumped.

  The bubble injection system S5 is different from the configuration of the bubble injection system S4 in that the shearing member 554 is not provided in the gas flow path 543 but is provided in the injection portion 515. Similar to the shear member 544, the shear member 554 is a porous member having a large number of pores, and is provided at a position corresponding to the injection portion 515 in the accommodating portion 511 so as to cover the injection portion 515.

  By setting it as such a structure, the bubble injection | pouring system S5 pumps the gas G and the liquid L simultaneously to the bottom part of the injection well 55 with a respectively different flow path similarly to the bubble injection | pouring system S4. And the bubble injection | pouring system S5 mixes the gas G and the liquid L in the vicinity of the storage layer R, and lets the fluid with which the gas G and the liquid L mixed pass the shearing member 554 provided in the injection | pouring part 515. FIG. Then, the fluid in which the gas G and the liquid L are mixed is sheared by the shearing member 554 to generate carbonated water containing microbubbles.

  As a result, the bubble injection system S5 can stably generate microbubbles at the bottom of the injection well 55 for a long period of time. Further, in the bubble injection system S5, the gas G and the liquid L flow separately in the press-fit well 55, so that corrosion of the housing portion 511 due to carbonated water can be prevented.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention. In addition, new embodiments generated by any combination of the embodiments are also included in the embodiments of the present invention. The effect of the new embodiment produced by the combination has the effect of the original embodiment.

  For example, in the above description, in the water treatment facility 2, an example in which the liquid L is generated by adding the surfactant to the accompanying water has been shown, but the surfactant may not be added to the liquid L. Moreover, in the water treatment equipment 2, you may produce | generate the liquid L by processing liquids other than accompanying water.

S ... Bubble injection system G ... Gas L ... Liquid R ... Reservoir 1 ... Gas pipe 2 ... Water treatment facility 3 ... Liquid pipe 4 ... Flow rate control device 41 ... Connection part 42 ... Valves 5, 51, 52, 53, 54, 55 ... Press-in wells 501, 511 ... Storage parts 502, 514, 524, 534, 544, 554 ... Shear members 503, 515 ... injection part 512, 542 ... liquid flow path 513, 533, 543 ... gas flow path 516, 546 ... blocking part 537 ... fixed part

Claims (7)

A bubble injection system for injecting a liquid containing bubbles generated based on a gas fluid that is a fluid containing a gas component into a hydrocarbon reservoir,
A liquid flow path for pumping a liquid mixed with the gas fluid to a first position in the vicinity of the reservoir;
A gas flow path for pumping the gas fluid to a second position in the vicinity of the reservoir;
A shearing member for generating bubbles in the liquid pumped by the liquid flow path by passing the gas fluid pumped by the gas flow path and shearing the gas fluid by pores;
An injection part for injecting bubbles generated in the liquid into the reservoir together with the liquid;
A bubble injection system comprising: The shearing member is a porous member that generates the bubbles having a particle size of 100 μm or less,
The bubble injection system according to claim 1. A storage section for storing the gas flow path and the liquid flow path;
The injection part is formed at a position corresponding to the depth of the reservoir in the accommodating part,
The bubble injection system according to claim 1 or 2. The gas flow path is provided inside the liquid flow path,
The bubble injection system according to any one of claims 1 to 3. A bubble injection method for injecting a liquid containing bubbles generated based on a gas fluid that is a fluid containing a gas component into a hydrocarbon reservoir,
Pumping the liquid mixed with the gas fluid to a first position in the vicinity of the reservoir;
Pumping the gas fluid to a second position in the vicinity of the reservoir;
Generating a bubble in the liquid pumped to the first position by shearing the gas fluid pumped to the second position through a shearing member having pores;
Injecting bubbles generated in the liquid into the reservoir together with the liquid;
A bubble injection method characterized by comprising: A method for producing a bubble injection system for injecting a liquid containing bubbles generated based on a gas fluid, which is a fluid containing a gas component, into a hydrocarbon reservoir,
Installing a liquid flow path for pumping the liquid mixed with the gas fluid so as to reach the first position in the vicinity of the reservoir;
Installing a gas flow path for pumping the gas fluid to reach a second position in the vicinity of the reservoir;
The liquid fluid pumped by the liquid flow channel is passed through the gas flow channel for pumping the gas fluid by passing the gas fluid pumped by the gas flow channel and shearing the gas fluid by pores. Fixing a shearing member that generates bubbles therein;
A method for manufacturing a bubble injection system, comprising: Before the step of installing the liquid channel and the step of installing the gas channel, the method includes a step of installing an accommodating portion for storing the liquid channel and the gas channel,
The manufacturing method of the bubble injection | pouring system of Claim 6.

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