CN115541821A - Seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device and method - Google Patents

Seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device and method Download PDF

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CN115541821A
CN115541821A CN202211167946.8A CN202211167946A CN115541821A CN 115541821 A CN115541821 A CN 115541821A CN 202211167946 A CN202211167946 A CN 202211167946A CN 115541821 A CN115541821 A CN 115541821A
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carbon dioxide
seabed
monitoring
early warning
data
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CN115541821B (en
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聂元训
吴必胜
张海涛
张莉
雷政达
程少逸
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Tsinghua University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/36Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/70Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells

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Abstract

The invention relates to a seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device and method, wherein the device comprises: the system comprises a seabed carbon dioxide sequestration injection system and a monitoring and early warning system; the subsea carbon dioxide sequestration injection system comprises: the seabed geological simulation equipment is used for simulating seabed geological conditions and comprises a water tank, wherein the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing reservoir layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top; a carbon dioxide injection device to inject carbon dioxide into the subsea carbon dioxide sequestration reservoir through the injection wellbore; the monitoring and early warning system comprises: the optical monitoring equipment is used for shooting image data of the surface of the sealing cover layer on the seabed carbon dioxide in the sealing process; the acidity monitoring equipment is used for acquiring acidity data; the acoustic monitoring equipment is used for acquiring acoustic wave data; and the first processing device stores and processes the image data, the acidity data and the acoustic wave data.

Description

Seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device and method
Technical Field
The invention relates to the technical field of seabed carbon dioxide geological sequestration, in particular to a seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device and method.
Background
The growing modern industry causes the emission of large amounts of greenhouse gases, which leads to the increasing greenhouse effect.
At present, the region with high carbon dioxide emission in China is close to coastal regions such as long triangles, bead triangles, the Bohai sea and the like, the carbon dioxide trapped in the region is transported to inland for sealing and storage, the defects of high cost, high transportation risk and the like exist, the population of the coastal regions is dense, and the alternative positions for land carbon dioxide sealing and storage are insufficient, and in order to solve the problem, the carbon dioxide seabed sealing and storage technology is tried to be adopted to reduce the carbon dioxide emission. Advantages of subsea sequestration of carbon dioxide include: the method has the advantages of close emission source, low transportation cost, low application cost, no land occupation, no influence on drinking water resources and small influence on living environment risk. Research shows that the long-term carbon dioxide storage can cause softening of rock tensile strength and the like, the stored carbon dioxide can be possibly induced to leak, and in order to explore the leakage risk and leakage characteristics of the whole period of the seabed carbon dioxide storage process to establish a corresponding early warning system, a simulation experiment of the whole period of the seabed carbon dioxide storage process should be carried out in a laboratory to evaluate the carbon dioxide leakage risk.
Disclosure of Invention
Aiming at the safety evaluation of a storage cover layer in the indoor simulation seabed carbon dioxide sealing and storing process, the device and the method can be used for evaluating the safety of the storage cover layer in the indoor simulation seabed carbon dioxide sealing and storing process through three aspects of optics, acoustics and acidity, and the purpose of integrated sealing and storing simulation of carbon dioxide injection, multi-parameter monitoring, parameter analysis and early warning functions is achieved.
According to a first aspect of the embodiments of the present invention, there is provided a seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device, comprising: the system comprises a seabed carbon dioxide sequestration injection system and a monitoring and early warning system;
the subsea carbon dioxide sequestration injection system comprises: seabed geological simulation equipment and carbon dioxide injection equipment;
the seabed geological simulation equipment is used for simulating seabed geological conditions and comprises a water tank, wherein the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, and faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
the carbon dioxide injection equipment is used for injecting carbon dioxide into the seabed carbon dioxide sequestration reservoir stratum through an injection wellbore;
the monitoring and early warning system comprises: the device comprises optical monitoring equipment, acidity monitoring equipment, acoustic monitoring equipment and first processing equipment;
the optical monitoring equipment is arranged on the surface of the sealing cover layer on the seabed carbon dioxide and is used for shooting image data of the surface of the sealing cover layer on the seabed carbon dioxide in the sealing process;
the acidity monitoring device is arranged near the injection shaft and is used for acquiring acidity data;
the acoustic monitoring equipment is arranged on the surface of the sealing cover layer on the seabed carbon dioxide and is used for acquiring acoustic data;
the first processing device is connected with the optical monitoring device, the acidity monitoring device and the acoustic monitoring device to store and process the image data, the acidity data and the acoustic data.
In one embodiment, preferably, the carbon dioxide injection apparatus includes: the system comprises a carbon dioxide storage tank, a cold machine, a carbon dioxide servo liquid injection pump, a valve, a pressure sensor and second processing equipment;
the carbon dioxide storage tank is used for providing a carbon dioxide gas source;
the refrigerator is connected to the carbon dioxide storage tank and used for controlling the temperature of a carbon dioxide gas source and producing liquid carbon dioxide;
the carbon dioxide servo liquid injection pump is connected to the refrigerator and is used for controlling the injection pressure and the injection speed of the carbon dioxide;
the valve is connected to a carbon dioxide servo liquid injection pump and is used for controlling the injection of carbon dioxide;
the pressure sensor is used for monitoring the pressure of the injection well shaft after carbon dioxide is injected;
the second processing equipment is connected to the pressure sensor and used for storing the pressure collected by the pressure sensor.
In one embodiment, preferably, a hollow cylindrical hole is arranged at the central position of the seabed carbon dioxide sequestration reservoir stratum and the seabed carbon dioxide upper sequestration cover layer, the hollow cylindrical hole penetrates through the seabed carbon dioxide upper sequestration cover layer and two thirds of the thickness of the seabed carbon dioxide sequestration reservoir stratum, and the injection shaft is arranged in the hollow cylindrical hole and sealed by epoxy resin at the periphery.
In an embodiment, preferably, the first processing device is specifically configured to: and comparing the image data acquired by the optical monitoring device with the reference image to analyze the displacement field on the surface of the sealing cover layer on the seabed carbon dioxide, and if circular displacement increment occurs in the displacement field, judging that bubbles are generated, and sending a leakage early warning.
In an embodiment, preferably, the first processing device is specifically configured to:
and when the acidity value of the acidity data is determined to be lower than 7, giving out a leakage early warning.
In an embodiment, preferably, the first processing device is specifically configured to:
recording the initial sound wave form, the frequency and the impact sound when the carbon dioxide is injected as basic data;
and when the sound wave data exceeds any one of the basic data, giving out a leakage early warning.
According to a second aspect of the embodiments of the present invention, there is provided a subsea carbon dioxide sequestration, monitoring and early warning integrated simulation method, the method comprising:
simulating the seabed geological condition by seabed geological simulation equipment, wherein the seabed geological condition comprises a water tank, and the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, wherein faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
a carbon dioxide injection facility injects carbon dioxide into the subsea carbon dioxide sequestration reservoir through an injection wellbore;
the method comprises the steps of monitoring image data, acidity data and sound wave data respectively through optical monitoring equipment, acidity monitoring equipment and acoustic monitoring equipment in a monitoring and early warning system, and sending out leakage early warning when the image data, the acidity data and the sound wave data reach preset conditions.
In one embodiment, preferably, when the image data, the acidity data, and the acoustic data reach preset conditions, the issuing of a leakage warning includes:
comparing the image data with a reference image to analyze a displacement field on the surface of a sealing cover layer on the seabed carbon dioxide, if circular displacement increment occurs in the displacement field, determining that bubbles are generated, and sending a leakage early warning;
when the acidity value of the acidity data is determined to be lower than 7, a leakage early warning is sent out;
recording an initial sound wave shape, frequency and impact sound when the carbon dioxide is injected as basic data; and when the sound wave data exceeds any one of the basic data, giving out a leakage early warning.
According to a third aspect of the embodiments of the present invention, there is provided a seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device, the device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
simulating the seabed geological condition by using seabed geological simulation equipment, wherein the seabed geological condition simulation equipment comprises a water tank, and the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, wherein faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
a carbon dioxide injection facility injects carbon dioxide into the subsea carbon dioxide sequestration reservoir through an injection wellbore;
the method comprises the steps of monitoring image data, acidity data and sound wave data respectively through an optical monitoring device, an acidity monitoring device and an acoustic monitoring device in a monitoring and early warning system, and sending out a leakage early warning when the image data, the acidity data and the sound wave data reach preset conditions.
According to a fourth aspect of embodiments of the present invention, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method according to any one of the embodiments of the second aspect.
The seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device is used for indoor seabed carbon dioxide sequestration simulation, and can achieve the purpose of integrated sequestration simulation of carbon dioxide injection, multi-parameter monitoring, parameter analysis and early warning functions. Compared with the prior art, the invention has the beneficial effects that:
1) The monitoring data type is rich: the safety of the storage cover layer in the seabed carbon dioxide sealing and storing process is comprehensively evaluated through three aspects of optics, acoustics and acidity.
2) Computer dynamic storage reduces the memory storage requirements: the high-speed camera is connected with a computer, whether a circular displacement field appears newly can be judged through a digital image correlation technology in the computer, if not, a newly shot picture is deleted, and if so, the shooting frequency is accelerated, and the memory requirement is reduced through dynamic storage.
3) The operation is convenient: after the prefabrication of the test piece is completed, the judgment of leakage can be completed only by the optical, acoustic and acidity information obtained by a computer.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram illustrating a subsea carbon dioxide sequestration, monitoring, and early warning integrated simulation device, according to an exemplary embodiment.
FIG. 2 is a flow diagram illustrating an integrated subsea carbon dioxide sequestration, monitoring, and early warning simulation method, according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
FIG. 1 is a schematic diagram illustrating a subsea carbon dioxide sequestration, monitoring, and early warning integrated simulation device, according to an exemplary embodiment.
As shown in fig. 1, according to a first aspect of the embodiments of the present invention, there is provided a subsea carbon dioxide sequestration, monitoring and early warning integrated simulation device, including: the system comprises a seabed carbon dioxide sequestration injection system and a monitoring and early warning system;
the subsea carbon dioxide sequestration injection system comprises: seabed geological simulation equipment and carbon dioxide injection equipment;
the seabed geological simulation equipment is used for simulating seabed geological conditions and comprises a water tank 1, wherein the water tank 1 sequentially comprises a seabed carbon dioxide lower sealing cover layer 2, a seabed carbon dioxide sealing storage layer 3, a seabed carbon dioxide upper sealing cover layer 2 and seawater 7 from bottom to top, and faults are arranged in the seabed carbon dioxide sealing storage layer 3 and the seabed carbon dioxide upper sealing cover layer 2;
wherein, the size of the simulated water tank 1 is 1m multiplied by 1m, and the upper part is opened; the thicknesses of the seabed carbon dioxide sealing cover layer 2 and the seabed carbon dioxide sealing reservoir layer 3 are set according to the actual geological conditions of the simulated sea conditions, such as the thickness of the cover layer 2 is 10cm, and the thickness of the reservoir layer 3 is 10cm; the fault 4 is a non-continuous surface prefabricated according to geological conditions, and may be only in a reservoir stratum or extend from the reservoir stratum to a cover stratum, and the actual condition is determined according to the geological conditions; the contact surface between the seabed carbon dioxide sealing cover layer 2 and the seabed carbon dioxide sealing reservoir layer 3 is tightly attached without a gap; as shown in fig. 1, a reservoir shaft 5 with the diameter of 1.5cm is drilled in the center of the seabed carbon dioxide sequestration reservoir stratum 3 and penetrates through the top cover stratum 2 and extends to two thirds of the reservoir stratum 3 by the seabed carbon dioxide sequestration cover stratum 2; the simulated injection shaft 6 is placed into the reservoir shaft 5, the periphery of the simulated injection shaft 6 is fixed in the reservoir shaft 5 by adopting epoxy resin, and the simulated injection shaft 6 is kept stand for 24 hours after the epoxy resin is injected, so that the simulated injection shaft 6 is fully bonded with the seabed carbon dioxide sealing cover layer 2 and the seabed carbon dioxide sealing reservoir layer 3.
The carbon dioxide injection equipment is used for injecting carbon dioxide into the seabed carbon dioxide sequestration reservoir stratum 3 through an injection wellbore 6;
the monitoring and early warning system comprises: an optical monitoring device 14, an acidity monitoring device 16, an acoustic monitoring device 17, and a first treatment device 18;
the optical monitoring device 14 is arranged on the surface of the sealing cover layer 2 on the seabed carbon dioxide and is used for shooting image data of the surface of the sealing cover layer on the seabed carbon dioxide in the sealing process; the optical monitoring device may be a high-speed camera. The camera may be housed within a transparent plastic cover 13, the transparent plastic cover 13 being placed on the surface of the subsea carbon dioxide cap layer 2 and a small number of weights being placed on the inner bottom surface of the transparent plastic cover 13 to prevent the transparent plastic cover 13 from tipping over. The high speed camera 14 is placed inside the transparent plastic cover 13.
The acidity monitoring device 16 is arranged near the injection well shaft and is used for collecting acidity data;
the acoustic monitoring equipment 17 is arranged on the surface of the sealing cover layer on the seabed carbon dioxide and is used for acquiring acoustic data;
the first processing device 18 is connected to the optical monitoring device 14, the acidity monitoring device 16 and the acoustic monitoring device 17 to store and process the image data, the acidity data and the acoustic data.
In one embodiment, preferably, the carbon dioxide injection apparatus includes: the system comprises a carbon dioxide storage tank 8, a refrigerator 9, a carbon dioxide servo liquid injection pump 10, a valve 11, a pressure sensor 12 and second processing equipment 15;
the carbon dioxide storage tank 8 is used for providing a carbon dioxide gas source;
the refrigerator 9 is connected to the carbon dioxide storage tank and used for controlling the temperature of a carbon dioxide gas source and producing liquid carbon dioxide;
a carbon dioxide servo liquid injection pump 10 connected to the refrigerator and used for controlling the injection pressure and speed of the carbon dioxide;
and setting the phase state of the carbon dioxide into a gaseous state, a liquid state and a supercritical state through a refrigerator and a servo injection pump, and injecting the carbon dioxide in the corresponding phase state into the seabed carbon dioxide sequestration reservoir. When the carbon dioxide is injected into the seabed carbon dioxide sequestration reservoir stratum, the carbon dioxide can be injected by the carbon dioxide servo liquid injection pump in two modes of constant pressure or constant speed.
The valve 11 is connected to a carbon dioxide servo liquid injection pump and is used for controlling the injection of carbon dioxide;
the pressure sensor 12 is used for monitoring the pressure of the injection wellbore after carbon dioxide injection;
the second processing device 15 is connected to the pressure sensor and is configured to store the pressure collected by the pressure sensor.
The simulated seawater 7 is injected into the simulated water tank 1, so that the distance between the liquid level of the simulated seawater 7 and the upper edge of the simulated water tank 1 is 10cm. The phase state of the carbon dioxide injected into the seabed carbon dioxide sequestration reservoir 3 can be a gas state, a liquid state and a supercritical state, the carbon dioxide storage tank 8 stores liquid carbon dioxide, and if the carbon dioxide is injected into the seabed carbon dioxide sequestration reservoir 3 in a gas state, the carbon dioxide can be directly injected into the seabed carbon dioxide sequestration reservoir 3 through the carbon dioxide servo liquid injection pump 10 without starting the cold machine 9; if the carbon dioxide is injected into the seabed carbon dioxide sequestration reservoir 3 in a liquid state, the cold machine 9 is started, the temperature of the carbon dioxide is reduced to 3 ℃, and then the carbon dioxide is injected into the seabed carbon dioxide sequestration reservoir 3 through the carbon dioxide servo liquid injection pump 10; if the carbon dioxide is injected into the seabed carbon dioxide sequestration reservoir 3 in a supercritical state, the cold machine 9 does not need to be started, the heating device is started, the carbon dioxide flowing out of the carbon dioxide storage tank 8 is heated to 40 ℃, and then the carbon dioxide is injected into the seabed carbon dioxide sequestration reservoir 3 through the carbon dioxide servo injection pump 10. When injecting carbon dioxide into the subsea carbon dioxide sequestration reservoir 3, the carbon dioxide can be injected at a constant pressure or a constant rate by the carbon dioxide servo-infusion pump 10.
In one embodiment, preferably, a hollow cylindrical hole is arranged at the central position of the seabed carbon dioxide sequestration reservoir layer and the seabed carbon dioxide sequestration cover layer, the hollow cylindrical hole penetrates through the seabed carbon dioxide sequestration cover layer and two thirds of the thickness of the seabed carbon dioxide sequestration reservoir layer, and the injection shaft is arranged in the hollow cylindrical hole and sealed by epoxy resin at the periphery.
In an embodiment, preferably, the first processing device is specifically configured to: and comparing the image data acquired by the optical monitoring device with the reference image to analyze the displacement field on the surface of the sealing cover layer on the seabed carbon dioxide, and if the displacement field has circular displacement increment, determining that bubbles are generated and sending a leakage early warning.
The photo storage and the shooting frequency are controlled by the program in the second processing device 15, the initial shooting interval is set to 1 frame/minute, and the first photo is permanently saved as a reference photo.
In an embodiment, preferably, the first processing device is specifically configured to:
and when the acidity value of the acidity data is determined to be lower than 7, giving out a leakage early warning.
In an embodiment, preferably, the first processing device is specifically configured to:
recording an initial sound wave shape, frequency and impact sound when the carbon dioxide is injected as basic data;
and when the sound wave data exceeds any one of the basic data, giving out a leakage early warning.
The optical monitoring can adopt a high-speed camera to shoot a photo of the surface of the cover layer in the sealing and storing process, the transparent plastic cover is arranged on the surface of the seabed carbon dioxide sealing and storing cover layer, and a small amount of heavy objects are arranged on the inner bottom surface of the transparent plastic cover to prevent the transparent plastic cover from overturning. And placing the high-speed camera in the transparent plastic cover, and controlling the storage and shooting frequency of the photos through the second processing equipment. The acidity monitoring device may be placed in the wellbore, in the vicinity of the prepared fault, using a high precision acidity meter, and store the acidity data in the first processing device. The acoustic monitoring equipment can adopt a waterproof sound wave probe to be arranged on the surface of the seabed carbon dioxide sealing cover layer, data are transmitted to processing equipment, and during sound wave testing, the waveform, the frequency and the impact sound of the sound wave at the initial stage of injection are collected as basic data. Comparing the shot current picture with a reference picture by using a digital image correlation technology, analyzing a displacement field on the surface of the seabed carbon dioxide sealing cover layer, judging that bubbles are generated if a circular displacement increment suddenly appears in the displacement field, and reporting to an analysis early warning module to send out a leakage early warning. And if the seawater acidity value measured by the high-precision acidity meter is lower than 7, reporting to an analysis early warning module to send out a leakage early warning. And if the sound wave data obtained by monitoring the waterproof sound wave probe exceeds any one of the initial sound wave waveform, the frequency and the impact sound as basic data through a computer program, reporting to an analysis early warning module, and sending out a leakage early warning.
FIG. 2 is a flow diagram illustrating an integrated subsea carbon dioxide sequestration, monitoring, and early warning simulation method, according to an exemplary embodiment.
As shown in fig. 2, according to a second aspect of the embodiment of the present invention, there is provided a subsea carbon dioxide sequestration, monitoring and early warning integrated simulation method, the method comprising:
step S201, simulating a seabed geological condition through seabed geological simulation equipment, wherein the seabed geological condition comprises a water tank, and the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, wherein faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
step S202, injecting carbon dioxide into the seabed carbon dioxide sequestration reservoir stratum through an injection wellbore by using carbon dioxide injection equipment;
and S203, respectively monitoring image data, acidity data and sound wave data through an optical monitoring device, an acidity monitoring device and an acoustic monitoring device in the monitoring and early warning system, and sending out a leakage early warning when the image data, the acidity data and the sound wave data reach preset conditions.
In one embodiment, preferably, when the image data, the acidity data, and the acoustic data reach preset conditions, the issuing of a leakage warning includes:
comparing the image data with a reference image to analyze a displacement field on the surface of a sealing cover layer on the seabed carbon dioxide, if circular displacement increment occurs in the displacement field, determining that bubbles are generated, and sending a leakage early warning;
when the acidity value of the acidity data is determined to be lower than 7, a leakage early warning is sent out;
recording the initial sound wave form, the frequency and the impact sound when the carbon dioxide is injected as basic data; and when the sound wave data exceeds any one of the basic data, giving out a leakage early warning.
According to a third aspect of the embodiments of the present invention, there is provided a seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device, the device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
simulating the seabed geological condition by seabed geological simulation equipment, wherein the seabed geological condition comprises a water tank, and the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, wherein faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
a carbon dioxide injection device injects carbon dioxide into the subsea carbon dioxide sequestration reservoir through an injection wellbore;
the method comprises the steps of monitoring image data, acidity data and sound wave data respectively through optical monitoring equipment, acidity monitoring equipment and acoustic monitoring equipment in a monitoring and early warning system, and sending out leakage early warning when the image data, the acidity data and the sound wave data reach preset conditions.
According to a fourth aspect of embodiments of the present invention, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method according to any one of the embodiments of the second aspect.
It is further understood that the term "plurality" means two or more, and other terms are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," etc. are used interchangeably throughout. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention.
It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (9)

1. A seabed carbon dioxide sequestration, monitoring and early warning integrated simulation device, its characterized in that, simulation device includes: the system comprises a seabed carbon dioxide sequestration injection system and a monitoring and early warning system;
the subsea carbon dioxide sequestration injection system comprises: seabed geological simulation equipment and carbon dioxide injection equipment;
the seabed geological simulation equipment is used for simulating seabed geological conditions and comprises a water tank, wherein the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, and faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
the carbon dioxide injection apparatus for injecting carbon dioxide into the subsea carbon dioxide sequestration reservoir through an injection wellbore;
the monitoring and early warning system comprises: the device comprises optical monitoring equipment, acidity monitoring equipment, acoustic monitoring equipment and first processing equipment;
the optical monitoring equipment is arranged on the surface of the sealing cover layer on the seabed carbon dioxide and is used for shooting image data of the surface of the sealing cover layer on the seabed carbon dioxide in the sealing process;
the acidity monitoring device is arranged near the injection well shaft and is used for acquiring acidity data;
the acoustic monitoring equipment is arranged on the surface of the sealing cover layer on the seabed carbon dioxide and is used for acquiring acoustic data;
the first processing device is connected with the optical monitoring device, the acidity monitoring device and the acoustic monitoring device to store and process the image data, the acidity data and the acoustic data.
2. The simulation apparatus of claim 1, wherein the carbon dioxide injection device comprises: the system comprises a carbon dioxide storage tank, a cold machine, a carbon dioxide servo liquid injection pump, a valve, a pressure sensor and second processing equipment;
the carbon dioxide storage tank is used for providing a carbon dioxide gas source;
the refrigerator is connected to the carbon dioxide storage tank and used for controlling the temperature of a carbon dioxide gas source and producing liquid carbon dioxide;
the carbon dioxide servo liquid injection pump is connected to the refrigerator and is used for controlling the injection pressure and the injection speed of the carbon dioxide;
the valve is connected to a carbon dioxide servo liquid injection pump and is used for controlling the injection of carbon dioxide;
the pressure sensor is used for monitoring the pressure of the injection well shaft after carbon dioxide is injected;
the second processing equipment is connected to the pressure sensor and used for storing the pressure collected by the pressure sensor.
3. The simulation apparatus according to claim 1, wherein a hollow cylindrical hole is provided at a central position of the subsea carbon dioxide sequestration reservoir and the subsea carbon dioxide top sequestration cap layer, the hollow cylindrical hole penetrating two thirds of the thickness of the subsea carbon dioxide top sequestration cap layer and the subsea carbon dioxide sequestration reservoir layer, and the injection wellbore is disposed in the hollow cylindrical hole and sealed with epoxy resin at the periphery.
4. The simulation apparatus according to claim 1, wherein the first processing device is specifically configured to: and comparing the image data acquired by the optical monitoring device with the reference image to analyze the displacement field on the surface of the sealing cover layer on the seabed carbon dioxide, and if the displacement field has circular displacement increment, determining that bubbles are generated and sending a leakage early warning.
5. The simulation apparatus according to claim 1, wherein the first processing device is specifically configured to:
and when the acidity value of the acidity data is determined to be lower than 7, giving out a leakage early warning.
6. The simulation apparatus according to claim 1, wherein the first processing device is specifically configured to:
recording an initial sound wave shape, frequency and impact sound when the carbon dioxide is injected as basic data;
and when the sound wave data exceeds any one of the basic data, giving out a leakage early warning.
7. An integrated simulation method for sequestration, monitoring and early warning of carbon dioxide on the seabed, which is used for the integrated simulation device for sequestration, monitoring and early warning of carbon dioxide on the seabed of any one of claims 1 to 6, and comprises the following steps:
simulating the seabed geological condition by using seabed geological simulation equipment, wherein the seabed geological condition simulation equipment comprises a water tank, and the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, wherein faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
a carbon dioxide injection facility injects carbon dioxide into the subsea carbon dioxide sequestration reservoir through an injection wellbore;
the method comprises the steps of monitoring image data, acidity data and sound wave data respectively through optical monitoring equipment, acidity monitoring equipment and acoustic monitoring equipment in a monitoring and early warning system, and sending out leakage early warning when the image data, the acidity data and the sound wave data reach preset conditions.
8. The simulation method of claim 7, wherein when the image data, acidity data, and acoustic data reach preset conditions, issuing a leak warning comprises:
comparing the image data with a reference image to analyze a displacement field on the surface of a sealing cover layer on the seabed carbon dioxide, if circular displacement increment occurs in the displacement field, determining that bubbles are generated, and sending a leakage early warning;
when the acidity value of the acidity data is determined to be lower than 7, a leakage early warning is sent out;
recording an initial sound wave shape, frequency and impact sound when the carbon dioxide is injected as basic data; and when the sound wave data exceeds any one of the basic data, giving out a leakage early warning.
9. A subsea carbon dioxide sequestration, monitoring and early warning integrated simulation device, the device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
simulating the seabed geological condition by seabed geological simulation equipment, wherein the seabed geological condition comprises a water tank, and the water tank sequentially comprises a seabed carbon dioxide lower sealing cover layer, a seabed carbon dioxide sealing storage layer, a seabed carbon dioxide upper sealing cover layer and seawater from bottom to top, wherein faults are arranged in the seabed carbon dioxide sealing storage layer and the seabed carbon dioxide upper sealing cover layer;
a carbon dioxide injection facility injects carbon dioxide into the subsea carbon dioxide sequestration reservoir through an injection wellbore;
the method comprises the steps of monitoring image data, acidity data and sound wave data respectively through optical monitoring equipment, acidity monitoring equipment and acoustic monitoring equipment in a monitoring and early warning system, and sending out leakage early warning when the image data, the acidity data and the sound wave data reach preset conditions.
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