Carbonated water circulation and injection system in artificial basalt accumulation layer for permanent sequestration for carbon dioxide

Abstract

A carbonated water circulation and injection system according to one embodiment of the present invention may comprise: a basalt accumulation unit including an accommodation space so as to allow basalt to be accumulated therein; an injection unit including at least one injection well and which injects carbonated water into the accommodation space; a production unit including at least one production well and which recovers a fluid remaining in the accommodation space to the outside thereof after the carbonated water injected through the injection unit reacts with the basalt and is mineralized; and a pump unit connected to the injection unit and the production unit and which supplies the carbonated water to the injection unit at a set pressure.

Description

Carbonated water circulation injection system within an artificial basalt accumulation layer for permanent carbon dioxide sequestration

[0001] The present invention relates to a carbonated water circulation injection system within an artificial basalt accumulation layer for the permanent sequestration of carbon dioxide.

[0002] CCUS (Carbon Capture Utilization and Storage) is a technology that captures carbon dioxide emitted into the atmosphere from industrial processes such as steel, chemicals, and power generation, and utilizes or stores it.

[0003] Although process technologies for utilizing chemical products converted by carbon dioxide chemical reactions have been developed and improved for various converted product families, there is a problem in that it is difficult to ensure economic feasibility and the actual amount of carbon dioxide reduction may be significantly reduced when the process scale is increased for large-scale carbon dioxide reduction.

[0004] Meanwhile, in the method of storing carbon dioxide underground, the carbon dioxide injected into the geological layer becomes fixed within the layer through carbonation and mineralization processes in the pores of the rock over a period of thousands to tens of thousands of years, so the possibility of it leaking back into the atmosphere is very low. On the other hand, in the underground carbon dioxide storage method, the most common target layer is a depleted gas reservoir layer where natural gas production has ceased and the fluid pressure within the layer has decreased.

[0005] Meanwhile, although underground carbon dioxide storage methods have been technically verified over many years and operated on a commercial scale, their application is often difficult due to the challenge of identifying suitable target geological layers and the general requirement for long-distance transportation of carbon dioxide from the capture source to the storage site. Furthermore, as the need for CCUS technology development increases, the difficulty of securing large-capacity target geological layers with economic feasibility is growing.

[0006] One embodiment of the present invention can provide a carbonated water circulation injection system within an artificial basalt accumulation layer that can promote economic efficiency by utilizing basalt, a widely distributed natural resource.

[0007] One embodiment of the present invention can provide a carbonated water circulation injection system within an artificial basalt accumulation layer that operates under low pressure conditions, thereby reducing the risk of carbon dioxide leakage and making response easy.

[0008] One embodiment of the present invention can provide a carbonated water circulation injection system within an artificial basalt accumulation layer capable of inducing efficient mineralization of carbon dioxide.

[0009] One embodiment of the present invention can provide a carbonated water circulation injection system within an artificial basalt accumulation layer by creating a fluid production well along with a carbonated water injection well in a basalt alluvial layer and reinjecting the produced fluid back into the carbonated water injection well to circulate it for a long period.

[0010] One embodiment of the present invention can provide a carbonated water circulation injection system within an artificial accumulation layer of basalt that can optimize the system according to the characteristics of basalt.

[0011] One embodiment of the present invention can provide a carbonated water circulation injection system within an artificial basalt accumulation layer that minimizes environmental impact by using basalt, a natural resource.

[0012] The problems of the present invention are not limited to those described above. A person skilled in the art to which the present invention pertains will have no difficulty understanding additional problems of the present invention from the overall contents of this specification.

[0013] A carbonated water circulation injection system according to one embodiment of the present invention comprises: a basalt filling section including a receiving space for basalt to be filled inside; an injection section including at least one injection well for injecting carbonated water into the receiving space; a production section including at least one production well for recovering fluid remaining in the receiving space to the outside of the receiving space after the carbonated water injected through the injection section reacts with the basalt and is mineralized; and a pump section connected to the injection section and the production section and supplying carbonated water to the injection section at a constant pressure.

[0014] The injection unit and the production unit may be installed spaced apart from the receiving space.

[0015] The fluid recovered in the above production unit is transferred to the above pump unit and reinjected into the above injection unit, thereby forming a circulation cycle, and the circulation cycle can be repeated at least once.

[0016] The above basalt alluvial deposit can have its entire outer surface of the receiving space sealed by a sealing member.

[0017] The sealing member comprises: a first sealing member disposed on the lower surface of the receiving space; and a second sealing member disposed to surround the remaining outer surface of the receiving space; wherein the first sealing member and the second sealing member may be made of different materials.

[0018] It may further include a filter unit installed outside the above-mentioned basalt alluvial section, installed between the pump section and the production section, for separating impurities from the fluid produced in the production section.

[0019] It may further include a replenishment unit installed between the pump unit and the filter unit, which replenishes carbon dioxide to the filtered fluid transferred from the filter unit to the pump unit.

[0020] The supplementary unit may include: a storage tank in which carbon dioxide is compressed and stored; a regulator valve connected to the storage tank; a sampling device installed between the filter unit and the pump unit for measuring the carbon dioxide concentration of the filtered fluid; and a carbon dioxide concentration control device connected to the regulator valve and the sampling device, which controls the regulator valve to supply carbon dioxide from the storage tank to the fluid when the concentration measured by the sampling device falls below a certain level.

[0021] The carbon dioxide concentration control device can control the regulator valve to automatically supply carbon dioxide to the fluid corresponding to the difference between the carbon dioxide concentration of the fluid measured by the sampling device and a preset carbon dioxide concentration.

[0022] The injection well and production well may include: a wellhead device installed outside the basalt alluvial deposit; and a lower pipe connected to the wellhead device and disposed in the receiving space, with a slot formed to communicate with the receiving space.

[0023] The pump unit comprises: an injection pump for injecting carbonated water into the injection well; and a control unit connected to the injection pump; wherein the control unit can adjust the injection pressure of the injection pump according to the pressure drop between the injection well and the production well.

[0024] The injection section and the production section each include a plurality of injection wells and a plurality of production wells, wherein the plurality of injection wells are arranged at one end in the longitudinal direction of the receiving space and are arranged at regular intervals along a direction parallel to the width direction of the receiving space, and the plurality of production wells are arranged at the other end in the longitudinal direction of the receiving space and are arranged at regular intervals along a direction parallel to the direction in which the plurality of injection wells are arranged.

[0025] The injection unit and the production unit each include a plurality of injection wells and a plurality of production wells, and the plurality of injection wells and production wells may be arranged such that a plurality of production wells adjacent to the injection well are each spaced apart by a certain distance from the injection well, centered on one injection well.

[0026] The carbonated water circulation injection system within the artificial basalt accumulation layer, which is an embodiment of the present invention, can achieve economic feasibility by utilizing basalt, a widely distributed natural resource.

[0027] A carbonated water circulation injection system within an artificial basalt accumulation layer, which is an embodiment of the present invention, is operated under low pressure conditions, so the risk of carbon dioxide leakage is low and response can be easy.

[0028] A carbonated water circulation injection system within an artificial basalt accumulation layer, which is an embodiment of the present invention, can induce efficient mineralization of carbon dioxide.

[0029] A carbonated water circulation injection system within an artificial basalt accumulation layer, which is an embodiment of the present invention, can increase mineralization efficiency by creating a fluid production well along with a carbonated water injection well in the basalt alluvial layer and reinjecting the produced fluid back into the carbonated water injection well and circulating it for a long period.

[0030] A carbonated water circulation injection system within an artificial basalt accumulation layer, which is an embodiment of the present invention, can optimize the system according to the characteristics of the basalt.

[0031] A carbonated water circulation injection system within an artificial basalt accumulation layer, which is an embodiment of the present invention, can minimize environmental impact by using basalt, a natural resource.

[0032] FIG. 1 is a schematic perspective view of a carbonated water circulation injection system according to an embodiment of the present invention.

[0033] Figure 2 is a side view of Figure 1.

[0034] FIG. 3 is a schematic perspective view of a carbonated water circulation injection system according to another embodiment of the present invention.

[0035] Figure 4 is a top view of the arrangement of multiple injection wells and production wells of Figure 3.

[0036] Fig. 5 is a modified example of Fig. 4.

[0037] Preferred embodiments of the present invention will be described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

[0038] In addition, embodiments of the present invention are provided to more fully explain the present invention to those with average knowledge in the relevant technical field.

[0039] In drawings, the shapes and sizes of elements may be exaggerated for clearer explanation.

[0040] In describing the embodiments of the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. The terms used in the detailed description are merely for describing the embodiments of the present invention and should not be limited in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form.

[0041] In this description, expressions such as “include” or “equipped” are intended to refer to certain characteristics, numbers, steps, actions, elements, parts or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts or combinations thereof other than those described.

[0042] Unless otherwise specifically defined in the specification of the present invention, % units mean weight %.

[0043] In this specification, terms such as 'top', 'upper', 'upper surface', 'lower', 'lower surface', 'lower surface', and 'side surface' are based on the drawings and may actually vary depending on the direction in which the elements or components are arranged.

[0044] Additionally, throughout the specification, when it is said that one part is 'connected' to another part, this includes not only cases where they are 'directly connected,' but also cases where they are 'indirectly connected' with other elements in between.

[0045] The present invention will be described in detail below through each embodiment or example of the invention. It should be noted that each embodiment or example described in this specification is not limited to a single embodiment or example, but may also be combined with other embodiments or examples. Accordingly, the citation of claims in the patent claims is merely an example of an embodiment, and the technical concept of the present invention should not be interpreted as being limited only to a combination with the cited claims; rather, combinations with various claims are also included within the scope of the technical concept of the present invention.

[0046] One embodiment of the present invention relates to a carbonated water circulation injection system within an artificial accumulation layer of basalt using basalt, wherein carbon dioxide can be mineralized by utilizing the chemical composition and physical properties of basalt, and can be used stably at a relatively low cost, making it environmentally friendly.

[0047] Basalt (B) contains Ca and Mg components, which can be effective for carbon dioxide mineralization. The weight of the major components relative to the total weight of the basalt is as follows:

[0048] CaO (calcium oxide): about 7 to 14 weight%

[0049] MgO (magnesium oxide): about 5 to 12 weight%

[0050] SiO2 (silicon dioxide): about 45 to 52 weight%

[0051] Al2O3 (aluminum oxide): about 10 to 16 wt%

[0052] Fe2O3 (iron oxide): about 5 to 14 weight%

[0053] Carbon dioxide in carbonated water reacts with the Ca and Mg components contained in basalt to be converted into carbonate minerals of CaCO3 and MgCO3.

[0054] Generally, compared to mineral carbonate raw materials with a relatively high Ca content, basalt has the advantage of promoting MgCO3 formation because it also has a high Mg content. In addition, the high SiO2 and Al2O3 content of basalt can help form a stable silicate structure after reaction with carbon dioxide.

[0055] In addition, the porous structure of basalt can vary depending on the type and origin, and the efficiency and operating conditions of carbonated water circulation injection may differ according to the pore structure based on the characteristics of the basalt pores:

[0056] For example, basalt with a uniform pore structure can proceed at a high circulation speed under constant pressure and maintain a constant residence time, allowing the use of filters of uniform size.

[0057] On the other hand, basalt, which has a heterogeneous pore structure, must proceed at a relatively slow speed under variable pressure, and a multi-stage filtering system may be required due to its relatively long residence time.

[0058] FIGS. 1 and 2 illustrate a carbonated water circulation injection system according to an embodiment of the present invention. More specifically, FIG. 1 shows a schematic perspective view of a carbonated water circulation injection system according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1. Hereinafter, a carbonated water circulation injection system (1) according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0059] As illustrated in FIG. 1, a carbonated water circulation injection system (1) according to an embodiment of the present invention is composed of a basalt alluvial section (100), an injection section (200), a production section (300), and a pump section (400). The basalt alluvial section (100) includes a receiving space (101) in which basalt (B) is received, and the basalt (B) can be accumulated in the receiving space (101) to form the basalt alluvial section (100).

[0060] The above-mentioned receiving space (101) may have a rectangular shape and may be 500m in length, 200m in width, and 20m in height. However, the shape and size of the above-mentioned basalt alluvial section (100) are not limited as long as basalt (B) is deposited inside and fluid flow can occur. At this time, as shown in FIG. 1, in the specification of the present invention, the length direction of the above-mentioned receiving space (101) may be the X direction, the width direction of the above-mentioned receiving space (101) may be the Y direction, and the height direction of the above-mentioned receiving space (101) may be the Z direction, and the X direction, Y direction, and Z direction may be directions perpendicular to each other.

[0061] Meanwhile, the entire outer surface of the basalt (B) of the basalt alluvial section (100) can be sealed by a sealing member (110). That is, the basalt alluvial section (100) can facilitate fluid movement to the production section (300) described later by preventing the fluid to be injected into the interior from passing through the upper, lower, and side of the receiving space (101). At this time, cement may be used for the sealing member (110), but the material is not limited thereto as long as the fluid passing through the interior of the basalt (B) cannot pass through the sealing member (110).

[0062] Additionally, the sealing member (110) may include a first sealing member (111) and a second sealing member (112), and the first sealing member (111) and the second sealing member (112) may be made of the same or different materials. For example, the first sealing member (111) may be made of a concrete layer of a certain height to prevent fluid flowing in the receiving space (101) from passing downward and at the same time form a safe and flat ground, and the second sealing member (112) may be made of cement to prevent the fluid from passing upward and sideways.

[0063] The injection unit (200) includes at least one injection well (210) installed in the receiving space (101), and the production unit (300) includes at least one production well (310) installed in the receiving space (101) but spaced apart from the injection unit (200). The pump unit (400) is connected to the injection unit (200) and the production unit (300) and supplies carbonated water to the injection unit (200) at a constant pressure.

[0064] At this time, the carbonated water injected into the injection unit (200) passes through the basalt (B) filled in the receiving space (101) and undergoes a mineralization reaction, and the remaining fluid after the carbonated water reacts with the basalt (B) and is mineralized is transferred to the production unit (300). The production unit (300) can recover the fluid remaining in the receiving space (101) after the carbonated water injected through the injection unit (200) reacts with the basalt (B) and is mineralized to the outside of the receiving space (101).

[0065] Here, the injection well (210) and production well (310) may include a wellhead unit (211, 311, Wellhead unit) installed outside the basalt alluvial section (100) and a lower pipe (212, 312) provided in the receiving space (101) connected to the wellhead unit (211, 311), and a slot (not shown) may be formed in the lower pipe (212, 312) to communicate with the receiving space (101). Here, the outside of the basalt alluvial section (100) may be the above-ground part, which is the upper part of the basalt alluvial section (100). The lower pipe (212, 312) is a pipe connected to the head equipment (211, 311) and serves as a passage for fluid flow between the basalt alluvial section (100) and the outside of the basalt alluvial section. A slotted liner type used in oil-gas production can be used, and the slot section can be the entire section in the height direction of the basalt alluvial section (100), and the perforated slots (not shown) can serve as passages for fluid flow.

[0066] Accordingly, carbonated water injected into the injection well (210) through the above-mentioned wellhead equipment (211) can move to the receiving space (101) through a slot (not shown) formed in the lower pipe (212), and carbonated water flowing in the receiving space (101) can move to the side of the wellhead equipment (311) of the production well (310) through a slot (not shown) formed in the lower distribution pipe (312).

[0067] The pump unit (400) includes an injection pump (410) that injects carbonated water into the injection well (210). The pressure of the carbonated water injected into the injection well (210) may vary depending on the injection pressure of the injection pump (410), and the carbonated water injected into the injection well (210) may move from the injection well (210) to the production well (310) due to the pressure difference between the injection pressure of the injection pump (410) and the pressure on the side of the production well (310). Additionally, since the pressure at the production well (310) is higher than atmospheric pressure, the fluid recovered to the production well (310) can naturally be transferred to the outside of the receiving space (101).

[0068] Meanwhile, as the carbonated water undergoes a mineralization reaction within the basalt alluvial layer (100), the pressure drop between the injection well (210) and the production well (310) may increase due to the deposition of impurities near the well. In this case, the system can be operated under normal conditions by increasing the injection pressure of the injection pump (410). Accordingly, the pump unit (400) further includes a control unit (420) connected to the injection pump (410), and the control unit (420) can adjust the injection pressure of the injection pump (410) according to the pressure drop between the injection well (210) and the production well (310). For example, even if the pressure drop within the alluvial layer varies depending on the average particle size (diameter) of the basalt (B) or the flow rate of the carbonated water injected into the injection well (210) varies, the control unit (420) can satisfy normal conditions by adjusting the injection pressure of the injection pump (410).

[0069] Meanwhile, the carbonated water circulation injection system (1) according to one embodiment of the present invention forms a circulation cycle as the carbonated water transferred from the production unit (300) to the pump unit (400) is reinjected into the injection unit (200), and the circulation cycle can be repeated at least once. For example, the circulation cycle can be operated for about 800 days with the goal of 3 cycles by calculating the fluid transfer time from the injection well (210) to the production well (310) as 260 days.

[0070] Furthermore, the carbonated water circulation injection system (1) according to one embodiment of the present invention may further include a filter unit (500) installed outside the basalt alluvial unit (100) and installed between the pump unit (400) and the production unit (300) to separate impurities from the fluid produced in the production unit (300). Here, the fluid produced in the production unit (300) refers to the fluid remaining after the carbonated water injected into the receiving space (101) through the injection unit (200) reacts with the basalt (B) and is mineralized, and the fluid transferred to the production unit (300) is drawn up to the outside of the basalt alluvial unit (100). At this time, since the fluid produced in the production unit (300) remains in the basalt alluvial unit (100) and contains impurities such as fine solid particles, it undergoes an impurity separation process in the filter unit (500) before entering the circulation cycle. For example, the above impurity separation process can remove relatively large particles by passing through a water cyclone separator, and then separate fine particles by passing through a cartridge-type filter. However, as long as it is possible to separate only impurities while maintaining the carbon dioxide of the fluid, the configuration of the filter unit (500) is not limited to the above example.

[0071] Furthermore, the carbonated water circulation injection system (1) according to one embodiment of the present invention may further include a replenishment unit (600). The replenishment unit (600) is installed between the pump unit (400) and the filter unit (500) and can replenish carbon dioxide in the filtered fluid transferred from the filter unit (500) to the pump unit (400). That is, since the carbon dioxide concentration in the produced fluid decreases as the circulation cycle is repeated in the carbonated water circulation injection system (1) according to one embodiment of the present invention, the concentration can be increased by replenishing carbon dioxide through the replenishment unit (600).

[0072] More specifically, the supplementary unit (600) includes a storage tank (610) in which carbon dioxide is compressed and stored, a regulator valve (620) connected to the storage tank (610), a sampling device (630) installed between the filter unit (500) and the pump unit (400) for measuring the carbon dioxide concentration of the filtered fluid, and a carbon dioxide concentration control device (640) connected to the regulator valve (620) and the sampling device (630). At this time, the regulator valve (620) can reduce the pressure of the carbon dioxide supplied to the fluid from the storage tank (610) to a certain level, and the carbon dioxide concentration control device (640) can measure the carbon dioxide concentration of the fluid at the sampling device (630), and control the regulator valve (620) to supply carbon dioxide to the fluid through the storage tank (610) when the concentration drops below a certain level. Furthermore, the user may set the concentration of carbon dioxide in the supplied fluid to control the carbon dioxide concentration of the supplied fluid to be constant. In this case, the concentration control device (640) can control the regulator valve (620) to automatically supply carbon dioxide to the fluid, which corresponds to the difference between the carbon dioxide concentration of the fluid measured by the sampling device (630) and the set carbon dioxide concentration.

[0073] That is, according to the carbonated water circulation injection system (1) of one embodiment of the present invention, the basalt (B) contains calcareous components such as CaO as a porous medium, thereby increasing the contact area and reaction speed in the reaction with carbonated water. In contrast to the conventional method of underground carbon dioxide storage, which takes thousands of years to solidify into a mineral, the carbonated water circulation injection system (1) can solidify it into a mineral form within a few years. For example, the carbonated water circulation injection system (1) can permanently sequester carbon dioxide that could be emitted into the atmosphere by mineralizing it as CaO reacts with carbon dioxide in the carbonated water to form CaCO3, or MgO reacts with carbon dioxide to form MgCO3. Furthermore, the mineralized alluvial layer can be recycled or crushed and used as a building material.

[0074] In addition, since the general CO2 underground CCS method is carried out in heterogeneous rock layers at a depth of 1,000m to 3,000m underground, the injection pressure for the injection well is required to be high, ranging from 80 to 300 barg. However, the carbonated water circulation injection system (1) according to one embodiment of the present invention can be operated at an injection pressure of less than 10 barg as an artificial basalt alluvial section (100) is formed, thereby saving injection energy. The carbonated water circulation injection system (1) can be individually designed according to the shape of the basalt alluvial section (100) and the flow rate of carbonated water injected into the injection section (200) by adjusting the pressure of the injection pump (410).

[0075] In particular, even if the carbonated water is transferred from the injection well (210) to the production well (310) and undergoes a mineralization reaction, only a portion of the carbonated water is mineralized and the remainder remains. In the carbonated water circulation injection system (1) according to one embodiment of the present invention, the remaining fluid is transferred to the production well (310), and the fluid transferred to the production well (310) is transferred to the pump unit (400) and reinjected into the injection well (210), thereby forming a circulation cycle. Furthermore, thus, the carbon dioxide concentration of the carbonated water fluid circulated by the filter unit (500) and the replenishment unit (600) can be maintained at a constant level, and the carbon dioxide that is continuously captured can be permanently sequestered or recycled.

[0076] FIGS. 3 to 5 illustrate a carbonated water circulation injection system according to another embodiment of the present invention. More specifically, FIG. 3 is a schematic perspective view of a carbonated water circulation injection system according to another embodiment of the present invention, FIG. 4 is a schematic top view of the arrangement of a plurality of injection wells and a plurality of production wells, and FIG. 5 is a modified example of FIG. 4. The following description will be made with reference to FIGS. 3 to 5, focusing on the differences from the carbonated water circulation injection system (1) according to one embodiment of the present invention.

[0077] A carbonated water circulation injection system (2) according to another embodiment of the present invention comprises an injection unit (200) and a production unit (300), each including a plurality of injection wells (210A, 210B, 210C, 210D, 210E) and a plurality of production wells (310A, 310B, 310C, 310D, 310E). At this time, the plurality of injection wells (210A to 210E) may be arranged at one end of the length direction of the receiving space (101) and may be arranged at regular intervals along a direction parallel to the width direction of the receiving space (101), and the plurality of production wells (310A to 310E) may be arranged at the other end of the length direction of the receiving space (101) and may be arranged at regular intervals along a direction parallel to the direction in which the plurality of injection wells (210A to 210E) are arranged.

[0078] Accordingly, the carbonated water circulation injection system (2) according to another embodiment of the present invention can induce a fluid flow of a straight flow (Line-drive well pattern) in the entire area of ​​the basalt alluvial section (100), and the injection section (200) and the production section (300) can induce a fluid flow of a straight distance (L) spaced apart in a direction parallel to the length direction.

[0079] Meanwhile, in a carbonated water circulation injection system (2) according to another embodiment of the present invention, the injection unit (200) and the production unit (300) each include the plurality of injection wells (210A to 210D) and the plurality of production wells (310A to 310I), and the plurality of injection wells (210A to 210D) and the production wells (310A to 310I) may be arranged such that the plurality of production wells adjacent to the injection well are each spaced apart by a certain distance from the injection well, and for example, as shown in the drawing, four production wells may be arranged such that they are each spaced apart by a certain distance.

[0080] For example, as illustrated in FIG. 5, a carbonated water circulation injection system (2) according to another embodiment of the present invention may have the plurality of injection wells (210A to 210D) and production wells (310A to 310I) configured in a 5-Spot well pattern, more specifically, the first to fourth production wells (310A to 310D) adjacent to the first injection well (210A) are each spaced apart by a certain distance, the third to sixth production wells (310C to 310F) adjacent to the second injection well (210B) are each spaced apart by a certain distance, the second and third production wells (310B, 310C) adjacent to the third injection well (210C) and the seventh and eighth production wells (310G, 310H) adjacent to the third injection well (210C) are each spaced apart by a certain distance, and the third production well (310C) adjacent to the fourth injection well (210D), The 6th production well (310F), and the 8th and 9th production wells (310H, 310I) can each be spaced apart by a certain distance.

[0081] Accordingly, the carbonated water circulation injection system (2) according to another embodiment of the present invention can arrange the plurality of injection wells and production wells in a linear flow (Line-drive) or 5-spot (5-spot) manner to secure a fluid residence time of at least a certain amount in the entire area of ​​the basalt alluvial section (100) and can promote the completion of mineral fixation in a short period of time. In addition, the carbonated water circulation injection system (2) according to another embodiment of the present invention can adjust the fluid residence time, the density of the injection wells and production wells, the injection flow rate of the injection wells, the production flow rate of the production wells, etc., according to the reaction rate of mineral fixation.

[0082] Although the present invention has been described above with reference to embodiments, the present invention is not limited to the embodiments described above, and it is understood that it can be modified and implemented by those skilled in the art without changing the technical concept of the present invention as claimed in the claims.

[0083] [Explanation of the symbol]

[0084] 1, 2: Carbonated water circulation infusion system

[0085] 100: Basaltic alluvial deposit 101: Reception space

[0086] 110: Sealing member 111: First sealing member

[0087] 112: Second sealing member 200: Injection part

[0088] 210: Injection well 211, 311: Wellhead equipment

[0089] 212, 312: Lower piping 300: Production department

[0090] 310: Production well 400: Pump section

[0091] 410: Injection pump 420: Control unit

[0092] 500: Filter section 600: Replenishment section

[0093] 610: Storage tank 620: Regulator valve

[0094] 630: Sampling device 640: Carbon dioxide concentration control device

[0095] B: Basalt

Claims

1. A basalt alluvial deposit including a receiving space for basalt to be deposited inside; An injection unit that injects carbonated water into the above-mentioned receiving space and includes at least one injection well; A production unit comprising at least one production well, wherein carbonated water injected through the injection unit reacts with the basalt to mineralize and recovers the fluid remaining in the receiving space to the outside of the receiving space; and A pump unit connected to the injection unit and the production unit, and supplying carbonated water to the injection unit at a constant pressure; A carbonated water circulation injection system including 2. In Paragraph 1, The above injection and production sections are, A carbonated water circulation injection system installed spaced apart from the above-mentioned receiving space.

3. In Paragraph 2, The fluid recovered in the above production unit is, A carbonated water circulation injection system that forms a circulation cycle by being transferred to the pump section and reinjected into the injection section, wherein the circulation cycle is repeated at least once.

4. In Paragraph 3, The above-mentioned basalt alluvial deposit is, A carbonated water circulation injection system in which the entire outer surface of the above-mentioned receiving space is sealed by a sealing member.

5. In Paragraph 4, The above sealing member is, A first sealing member disposed on the lower surface of the above-mentioned receiving space; and A second sealing member positioned to surround the remaining outer surface of the above-mentioned receiving space; Includes, A carbonated water circulation injection system in which the first sealing member and the second sealing member are made of the same or different materials.

6. In Paragraph 4, A filter unit installed outside the above-mentioned basalt alluvial section, installed between the pump section and the production section, for separating impurities from the fluid produced in the production section; A carbonated water circulation injection system including additional carbonated water.

7. In Paragraph 6, A replenishment unit installed between the pump unit and the filter unit, which replenishes carbon dioxide to the filtered fluid transferred from the filter unit to the pump unit; A carbonated water circulation injection system including additional carbonated water.

8. In Paragraph 7, The above supplementary part is, Storage tank in which carbon dioxide is compressed and stored; A regulator valve connected to the above storage tank; A sampling device installed between the filter unit and the pump unit for measuring the carbon dioxide concentration of the filtered fluid; and A carbon dioxide concentration control device connected to the regulator valve and the sampling device, which controls the regulator valve to supply carbon dioxide to the fluid from the storage tank when the concentration measured by the sampling device falls below a certain level; A carbonated water circulation injection system including 9. In Paragraph 8, The above carbon dioxide concentration control device is, A carbonated water circulation injection system that controls the regulator valve to automatically supply carbon dioxide to the fluid corresponding to the difference between the carbon dioxide concentration of the fluid measured by the sampling device and a preset carbon dioxide concentration.

10. In Paragraph 7, The above injection and production tablets are, Wellhead equipment installed outside the above-mentioned basalt alluvial deposit; and A lower pipe connected to the above-mentioned head equipment and positioned in the above-mentioned receiving space, with a slot formed therein to communicate with the above-mentioned receiving space; A carbonated water circulation injection system including 11. In Paragraph 10, The above pump unit is, An injection pump for injecting carbonated water into the injection well; and A control unit connected to the above injection pump; Includes, The above control unit is, A carbonated water circulation injection system that regulates the injection pressure of the injection pump according to the pressure drop between the injection well and the production well.

12. In Paragraph 7, The above injection and production sections are, Each includes multiple injection points and multiple production points, and The above plurality of injection tablets are, It is positioned at one end in the longitudinal direction of the above-mentioned receiving space, and is arranged at regular intervals along a direction parallel to the width direction of the above-mentioned receiving space, The above plurality of production wells, A carbonated water circulation injection system disposed at the other end of the length direction of the above-mentioned receiving space, and arranged at regular intervals along a direction parallel to the direction in which the plurality of injection wells are disposed.

13. In Paragraph 7, The above injection and production sections are, Each includes multiple injection points and multiple production points, and The above plurality of injection and production wells are, A carbonated water circulation injection system in which a plurality of production wells adjacent to a central injection well are arranged at a certain distance from each other.

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