A device and method for in-situ detection of shallow sea seabed environmental effects

Abstract

The present application relates to a kind of shallow seabed environmental effects in-situ detection device and detection method, the detection device includes closed reaction kettle, geochemical detection system, data storage and transmission response system, central support plate, detection probe and multiple support probe;The closed reaction kettle is located at the top of central support plate;The detection probe and support probe are vertically connected to the bottom of central support plate;The geochemical detection system is used to detect the gas change of near-seabed water body in closed reaction kettle and the gas change and formation characteristics change in formation;The data storage and transmission response system is used to store and transmit the detection data of geochemical detection system.The shallow seabed environmental effects in-situ detection device provided by the present application can be placed by seabed insertion, and the near-seabed water body and shallow seabed formation are in-situ detected by geochemical detection method, which can provide early warning technical support for seabed environmental effect abnormal change.

Description

Technical Field

[0001] This invention relates to the field of marine engineering and environmental geology testing technology, and more specifically, to an in-situ testing device and method for detecting the environmental effects of shallow seabed. Background Technology

[0002] In current shallow-sea oil and gas production and marine engineering operations, the focus is primarily on site stability and geological safety. However, there is a lack of in-situ monitoring of environmental effects such as shallow gas (methane, sulfur dioxide, carbon dioxide) leakage, oil and gas spills, and water pollution caused by offshore construction or oil and gas production. This hinders timely assessment of the seabed and water environment effects caused by offshore construction and oil and gas production operations. Especially during shallow-sea engineering projects such as oil and gas site construction and oil and gas production operations, real-time monitoring of anomalies in methane (CH4), hydrogen sulfide (H2S), and carbon dioxide (CO2) in the near-seabed water, as well as changes in pore water pressure and permeability, can effectively evaluate the safety and environmental friendliness of oil and gas sites, particularly the environmental effects during construction and oil and gas production. This allows for early warning of environmental risks and supports safe, stable, and environmentally friendly oil and gas production and engineering operations. However, existing shallow-sea engineering mainly focuses on detecting ocean water movement or indoor water composition, and water observation is mainly conducted using surface buoys, satellites, etc. Water elements are mainly waves, currents, etc. At the same time, laboratory testing of water composition after water collection is difficult to achieve the technical effect of in-situ detection of near-seabed water and shallow strata. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an in-situ detection device and method for detecting the environmental effects of shallow seabed, in order to solve the problems existing in the prior art.

[0004] According to a first aspect of the present invention, an in-situ detection device for shallow seabed environmental effects is provided, comprising a sealed reaction vessel, a geochemical detection system, a data storage and transmission response system, a central support plate, detection probes, and multiple support probes; wherein,

[0005] The sealed reactor is located on top of the central support plate. The sealed reactor is used to collect near-seabed water and inject the water into its internal hollow cavity.

[0006] The detection probe and multiple support probes are vertically connected to the bottom of the central support plate. The detection probe is located at the center of the central support plate, and the multiple support probes are located at the edge of the support plate. Both the detection probe and the support probes are used to insert into the seabed strata.

[0007] The geochemical detection system includes a geochemical detection probe, a stratigraphic detection sensor assembly, and a geochemical detection control terminal; both the geochemical detection probe and the stratigraphic detection sensor assembly are electrically connected to the geochemical detection control terminal; the geochemical detection probe is located in the sealed reaction vessel and is used to detect gas changes in the near-seafloor water within the sealed reaction vessel; the stratigraphic detection sensor assembly is located on the detection probe rod and is used to detect gas changes and stratigraphic characteristic changes in the formation;

[0008] The data storage and transmission response system is electrically connected to the geochemical detection system and is used to store and transmit the detection data of the geochemical detection system.

[0009] Preferably, the sealed reaction vessel is equipped with a water injection system, which is electrically connected to the data storage and transmission response system;

[0010] The water injection system includes a water injection control terminal and a water collector, and the water collector is electrically connected to the water injection control terminal.

[0011] Preferably, both the bottom end of the support probe and the bottom end of the detection probe are provided with water nozzles, and the sealed reaction vessel is provided with a water conduit connected to the water nozzles. The water conduit is used to transport water in the sealed reaction vessel to the water nozzles.

[0012] Preferably, the sealed reactor is covered with a glass microsphere float frame.

[0013] Preferably, the formation detection sensor assembly includes a first formation detection sensor element and a second formation detection sensor element;

[0014] The first formation detection sensor element is disposed on the outer wall of the detection probe and is used to detect gas changes in the formation;

[0015] The second formation detection sensor element is located at the bottom end of the detection probe and is used to detect changes in formation characteristics.

[0016] Preferably, the detection probe is covered with a metal mesh, which is used to protect the formation detection sensor assembly.

[0017] Preferably, the detection probe includes multiple detection probe units connected together, and two adjacent detection probe units are connected by a connecting component.

[0018] Preferably, the sealed reaction vessel is provided with a battery compartment, and a battery is provided in the battery compartment. The geochemical detection system and the data storage and transmission response system are both electrically connected to the battery.

[0019] Preferably, the sealed reaction vessel, the central support plate, the detection probe, and the support probe are all made of stainless steel.

[0020] According to a second aspect of the present invention, an in-situ detection method for shallow seabed environmental effects is provided, which is implemented using the shallow seabed environmental effect in-situ detection device as described above, the detection method comprising:

[0021] The in-situ detection device for shallow seabed environmental effects was lowered to the seabed, and the support probe and detection probe of the in-situ detection device for shallow seabed environmental effects were inserted into the shallow seabed strata.

[0022] A closed reaction vessel collects near-seabed water into its internal hollow cavity;

[0023] The geochemical detection system detects near-seabed water in a sealed reaction vessel and the strata into which the detection probe is inserted.

[0024] The data storage and transmission response system stores the detection data from the geochemical detection system and transmits the detection data to the data receiving and response terminal.

[0025] After the detection is completed, the support probe and detection probe of the in-situ detection device for shallow seabed environmental effects are retrieved from the shallow seabed strata, thus completing the recovery of the in-situ detection device for shallow seabed environmental effects.

[0026] The in-situ detection device and method for shallow seabed environmental effects provided by this invention can be deployed by seabed insertion and use geochemical detection methods to conduct in-situ detection of near-seabed water and shallow seabed strata, providing early warning technical support for abnormal changes in seabed environmental effects. Attached Figure Description

[0027] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of the structure of an in-situ detection device for shallow seabed environmental effects according to an embodiment of the present invention is shown.

[0029] Figure 2 A schematic diagram of the arrangement of the detection probe and the support probe on the central support plate in the in-situ detection device for shallow seabed environmental effects according to an embodiment of the present invention is shown.

[0030] Figure 3A top view of the sealed reaction vessel in the in-situ detection device for shallow seabed environmental effects according to an embodiment of the present invention is shown.

[0031] Figure 4 A top view of the detection probe in an in-situ detection device for shallow seabed environmental effects according to an embodiment of the present invention is shown.

[0032] In the diagram: 1. Sealed reaction vessel; 2. Geochemical detection response and data storage terminal; 3. Geochemical detection control terminal; 4. Geochemical detection probe; 5. Water injection response and data storage terminal; 6. Water injection control terminal; 7. Water injection port; 8. Battery compartment; 9. Tilt sensor; 10. Central support plate; 11. Connecting sleeve; 12. Water flow conduit; 13. Support probe; 14. Water flow nozzle; 15. Detection probe; 16. Connecting assembly; 17. First formation detection sensor element; 18. Second formation detection sensor element; 19. Metal mesh; 20. Fixing pipe; 21. Sealing plate. Detailed Implementation

[0033] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0034] This invention provides an in-situ detection device for shallow seabed environmental effects, see [link / reference]. Figure 1The in-situ detection device for shallow seabed environmental effects includes a sealed reaction vessel 1, a geochemical detection system, a data storage and transmission response system, a central support plate 10, detection probes 15, and multiple support probes 13. The sealed reaction vessel 1 is located at the top of the central support plate 10 and is used to collect near-seabed water and inject it into its internal hollow cavity. The detection probes 15 and the multiple support probes 13 are vertically connected to the bottom of the central support plate 10, with the detection probe 15 located at the center of the central support plate 10 and the multiple support probes 13 located on the support plate. At the edge position, both the detection probe 15 and the support probe 13 are used to insert into the seabed strata; the geochemical detection system includes a geochemical detection probe 4, a stratum detection sensor assembly, and a geochemical detection control terminal 3; the geochemical detection probe 4 and the stratum detection sensor assembly are both electrically connected to the geochemical detection control terminal 3; the geochemical detection probe 4 is located in the sealed reaction vessel 1 and is used to detect gas changes in the near-seabed water in the sealed reaction vessel 1; the stratum detection sensor assembly is located on the detection probe 15 and is used to detect gas changes and stratum characteristic changes in the strata; the data storage and transmission response system is electrically connected to the geochemical detection system and is used to store and transmit the detection data of the geochemical detection system.

[0035] Specifically, the central support plate 10 is a circular plate structure. The sealed reaction vessel 1, the detection probe 15, and the support probe 13 are all connected to the central support plate 10, which is the main supporting component of the entire device, providing structural support for the sealed reaction vessel 1. In this embodiment, a connecting sleeve 11 is provided at the top center of the central support plate 10, and the sealed reaction vessel 1 is connected to the top of the connecting sleeve 11. The sealed reaction vessel 1 has a cylindrical structure with a hollow cavity inside. The hollow cavity is used to contain water. The collected water enters the hollow cavity inside the sealed reaction vessel 1 for detection by the geochemical detection probe 4. The detection probe 15 and the support probe 13 are both slender circular tube structures. The bottom ends of the detection probe 15 and the support probe 13 are wedge-shaped, which facilitates easy insertion into the seabed strata. In this embodiment, there are three support probes 13, which are evenly distributed around the circumference of the central support plate 10. Figure 2 As shown, the three support probes 13 are distributed at 120° angles to each other on the horizontal plane. In this embodiment, the sealed reaction vessel 1, the central support plate 10, the detection probes 15, and the support probes 13 are all made of 316L stainless steel to improve the corrosion resistance of the device, making it suitable for use in marine environments, while also giving the detection device high structural strength.

[0036] In this embodiment, the geochemical detection probe 4 includes three gaseous geochemical detection probes: methane (CH4), hydrogen sulfide (H2S), and carbon dioxide (CO2). These probes can detect the gaseous components of near-seabed water samples collected in a sealed reaction vessel 1. Specifically, the type of geochemical detection probe 4 can be pre-installed into the cavity of the sealed reaction vessel 1 according to the required gas parameters.

[0037] In this embodiment, the formation detection sensor assembly includes a first formation detection sensor element 17 and a second formation detection sensor element 18. The first formation detection sensor element 17 is disposed on the outer wall of the detection probe 15 and is used to detect gas changes in the formation. The second formation detection sensor element 18 is disposed at the bottom end of the detection probe 15 and is used to detect changes in formation characteristics. Specifically, the first formation detection sensor element 17 is a gas detection sensor for detecting methane (CH4), hydrogen sulfide (H2S), and carbon dioxide (CO2) in the formation, and the second formation detection sensor element 18 is a detection sensor for detecting formation permeability and pore water pressure. In this embodiment, the detection probe 15 is covered with a metal mesh 19, which is used to protect the formation detection sensor assembly. The metal mesh 19 allows water in the formation to permeate while blocking sediments from entering, preventing damage to the formation detection sensor assembly during insertion or removal of the detection probe 15 from the formation.

[0038] A water injection system is installed on the sealed reactor 1, and the water injection system is electrically connected to the data storage and transmission response system. The water injection system includes a water injection control terminal 6 and a water collector, and the water collector is electrically connected to the water injection control terminal 6. In this embodiment, the water collector includes a water injection port 7 installed on the side wall of the sealed reactor 1. A solenoid valve can be installed at the water injection port 7 for opening and closing the water injection port 7. The water injection control terminal 6 is electrically connected to the solenoid valve to control the opening and closing of the solenoid valve.

[0039] In this embodiment, the data storage and transmission response system includes a geochemical detection response and data storage terminal 2 and a water injection response and data storage terminal 5. The geochemical detection control terminal is electrically connected to the geochemical detection response and data storage terminal 2, and the water injection control terminal 6 is electrically connected to the water injection response and data storage terminal 5. The data storage and transmission response system can issue water extraction commands to the sealed reactor 1, water detection commands to the geochemical detection probe 4, and formation detection commands to the formation detection sensor assembly on the detection probe 15. Simultaneously, it can store the water detection data and formation detection data from the geochemical detection system and can transmit the data instantly to the data receiving and response terminal on the drilling vessel, platform, or other oil and gas production facility, and can communicate with the drilling vessel, platform, or other oil and gas production facility.

[0040] A battery compartment 8 is provided on the sealed reaction vessel 1, and a battery is installed in the battery compartment 8. The water injection system, the geochemical detection system, and the data storage and transmission response system are all electrically connected to the battery. In this embodiment, the battery compartment 8 is located on the top of the sealed reaction vessel 1, and the battery is a rechargeable battery that is detachably connected to the battery compartment 8. The battery can be charged or replaced according to the working time and detection power to power the operation of the entire detection device.

[0041] An inclination sensor 9 is also installed on the sealed reaction vessel 1. The inclination sensor 9 is used to detect the inclination of the detection device during deployment, ensuring that the detection device can be deployed almost perpendicular to the seabed strata. In this embodiment, two inclination sensors 9 are provided, and both inclination sensors 9 are installed on the top of the battery compartment 8.

[0042] The sealed reactor 1 is further encased in a glass microsphere floating frame. This frame, made of glass microsphere buoyancy material, provides buoyancy to the detection device, facilitating its removal. Specifically, by controlling the volume of water injected into the sealed reactor 1, the balance between the overall weight of the detection device and the buoyancy of the glass microsphere floating frame is adjusted, enabling the detection device to be easily inserted into and removed from the soil.

[0043] In this detection device, water nozzles 14 are provided at the bottom ends of both the supporting probe 13 and the detection probe 15. A water conduit 12 connected to the water nozzles 14 is provided on the sealed reaction vessel 1. The water conduit 12 is used to transport water from the sealed reaction vessel 1 to the water nozzles 14. After the detection work is completed, the tested water is sprayed out from the water nozzles 14, thereby disrupting the soil around the detection probe 15 and the supporting probe 13, reducing the soil's adsorption force on the probe, and facilitating the removal of the detection device from the stratum. In specific implementation, a booster pump or high-pressure gas cylinder can be installed on the sealed reaction vessel 1. By controlling the booster pump or high-pressure gas cylinder to increase the pressure in the hollow cavity inside the sealed reaction vessel 1, the water in the sealed reaction vessel 1 is transported to the water nozzles 14 and sprayed out. A check valve with a single-sided opening is provided at the water nozzle 14, which can only be opened by impact from the water flow channel inside the probe rod to prevent external soil from clogging the water nozzle 14 during insertion into the stratum. In this embodiment, the top end of the supporting probe rod 13 is connected to a fixed pipe 20, and the supporting probe rod 13 is connected to the middle support plate 10 through the fixed pipe 20. The top end of the fixed pipe 20 is provided with a sealing plate 21. The supporting probe rod 13 has a water flow channel connecting the water nozzle 14 and the inside of the fixed pipe 20. The water flow guide 12 is connected to the inside of the fixed pipe 20. After the water in the sealed reaction vessel 1 is pressurized, it enters the inside of the fixed pipe 20 through the water flow guide 12, and is then transported to the water nozzle 14 through the connecting channel between the fixed pipe 20 and the water nozzle 14 and sprayed out.

[0044] In this embodiment, the detection probe 15 includes multiple detection probe units connected together, and adjacent detection probe units are connected by a connecting assembly 16. By increasing or decreasing the number of detection probe units, the overall length of the detection probe 15 can be adjusted to achieve detection at different formation depths, thereby improving the applicability of the detection device. In specific implementation, the ends of the detection probe units are provided with external threads, and the two ends of the connecting assembly 16 are provided with matching internal threads. The connecting assembly 16 is threadedly connected to two adjacent detection probe units to achieve connection and fixation. The connecting assembly 16 can also be of other structural forms, as long as it can achieve connection and fixation between two adjacent detection probe units.

[0045] See Figure 3 and Figure 4 In this embodiment, two geochemical detection response and data storage terminals 2, geochemical detection control terminals 3, geochemical detection probes 4, water injection response and data storage terminals 5, water injection control terminals 6, and water injection ports 7 are respectively provided on the sealed reaction vessel 1. Four formation detection sensor components are distributed in a circular array on the detection probe rod 15, which realizes at least "one for use and one for backup" of the key detection components, thereby improving the detection reliability and stability of the detection device.

[0046] This invention also provides an in-situ detection method for shallow seabed environmental effects, which is implemented using the in-situ detection device for shallow seabed environmental effects as described above. The detection method includes the following steps:

[0047] S1. Lower the in-situ detection device for shallow seabed environmental effects to the seabed, and insert the support probe and detection probe of the in-situ detection device for shallow seabed environmental effects into the shallow seabed strata.

[0048] Specifically, before lowering the in-situ detection device for shallow seabed environmental effects, the various parts of the detection device are connected to form a complete and working detection device.

[0049] By using manual labor, hoisting, or ROV assistance, the detection device is inserted into the shallow seabed strata near the seabed, enabling precise deployment of the detection device on the seabed.

[0050] S2. The sealed reactor collects near-seabed water into its internal hollow cavity.

[0051] Specifically, the water injection system on the sealed reactor operates to inject water into the hollow cavity inside the sealed reactor.

[0052] S3, the geochemical detection system detects near-seabed water in a sealed reactor and the strata into which the detection probe is inserted.

[0053] Specifically, the geochemical detection control terminal controls the geochemical detection probe to detect the content of methane (CH4), hydrogen sulfide (H2S), and carbon dioxide (CO2) in the near-seafloor water, and controls the formation detection sensor assembly to detect parameters such as the content of methane (CH4), hydrogen sulfide (H2S), and carbon dioxide (CO2) in the formation, as well as parameters such as pore water pressure and permeability changes.

[0054] S4. The data storage and transmission response system stores the detection data of the geochemical detection system and transmits the detection data to the data receiving and response terminal.

[0055] Specifically, after the detection is completed, the water body detection data and formation detection data of the geochemical detection system are stored in the geochemical detection response and data storage terminal in real time, and can be transmitted to drilling ships, platforms or other oil and gas production facilities in real time for environmental effect analysis and evaluation.

[0056] S5. After the detection is completed, the support probe and detection probe of the in-situ detection device for shallow seabed environmental effects are pulled out from the shallow seabed strata, thus completing the recovery of the in-situ detection device for shallow seabed environmental effects.

[0057] Specifically, the water injection response and data storage terminal controls the pressurization of water in the sealed reaction vessel. The pressurized water is sprayed out from the water nozzles at the bottom of the detection rod and the support rod through the water flow conduit. The sprayed water disrupts the soil around the probe rod, reducing the soil's adsorption force on the probe rod. This makes it easier to remove the detection device from the soil again with manual labor, hoisting, or ROV assistance, thus completing the recovery of the detection device.

[0058] Based on the characteristics of the water and formation environmental effects continuously monitored on the seabed, the water sampling frequency, water / formation detection frequency, sensor detection content and cycle can be adjusted to provide sufficient and effective detection data support for offshore oil and gas operations or environmental assessments.

[0059] In summary, the in-situ detection device and method for shallow seabed environmental effects provided by this invention can be deployed by seabed insertion and use geochemical detection methods to conduct in-situ detection of near-seabed water and shallow seabed strata, providing early warning technical support for abnormal changes in seabed environmental effects.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An in-situ detection device for shallow seabed environmental effects, characterized in that, It includes a sealed reaction vessel, a geochemical detection system, a data storage and transmission response system, a central support plate, detection probes, and multiple support probes; among which, The sealed reactor is located on top of the central support plate. The sealed reactor is used to collect near-seabed water and inject the water into its internal hollow cavity. The detection probe and multiple support probes are vertically connected to the bottom of the central support plate. The detection probe is located at the center of the central support plate, and the multiple support probes are located at the edge of the support plate. Both the detection probe and the support probes are used to insert into the seabed strata. The geochemical detection system includes a geochemical detection probe, a stratigraphic detection sensor assembly, and a geochemical detection control terminal; both the geochemical detection probe and the stratigraphic detection sensor assembly are electrically connected to the geochemical detection control terminal; the geochemical detection probe is located in the sealed reaction vessel and is used to detect gas changes in the near-seafloor water within the sealed reaction vessel; the stratigraphic detection sensor assembly is located on the detection probe rod and is used to detect gas changes and stratigraphic characteristic changes in the formation; The data storage and transmission response system is electrically connected to the geochemical detection system and is used to store and transmit the detection data of the geochemical detection system.

2. The in-situ detection device for shallow seabed environmental effects according to claim 1, characterized in that, The sealed reactor is equipped with a water injection system, which is electrically connected to the data storage and transmission response system. The water injection system includes a water injection control terminal and a water collector, and the water collector is electrically connected to the water injection control terminal.

3. The in-situ detection device for shallow seabed environmental effects according to claim 2, characterized in that, Both the bottom end of the support probe and the bottom end of the detection probe are provided with water nozzles. The sealed reaction vessel is provided with a water flow conduit connected to the water nozzles. The water flow conduit is used to transport water in the sealed reaction vessel to the water nozzles.

4. The in-situ detection device for shallow seabed environmental effects according to claim 3, characterized in that, The sealed reactor is externally covered with a glass microsphere floating frame.

5. The in-situ detection device for shallow seabed environmental effects according to claim 1, characterized in that, The formation detection sensor assembly includes a first formation detection sensor element and a second formation detection sensor element. The first formation detection sensor element is disposed on the outer wall of the detection probe and is used to detect gas changes in the formation; The second formation detection sensor element is located at the bottom end of the detection probe and is used to detect changes in formation characteristics.

6. The in-situ detection device for shallow seabed environmental effects according to claim 5, characterized in that, The detection probe is covered with a metal mesh, which is used to protect the formation detection sensor assembly.

7. The in-situ detection device for shallow seabed environmental effects according to claim 1, characterized in that, The detection probe includes multiple detection probe units connected together, and two adjacent detection probe units are connected by a connecting component.

8. The in-situ detection device for shallow seabed environmental effects according to claim 1, characterized in that, The sealed reactor is equipped with a battery compartment, which contains a battery. The geochemical detection system and the data storage and transmission response system are both electrically connected to the battery.

9. The in-situ detection device for shallow seabed environmental effects according to claim 1, characterized in that, The sealed reaction vessel, the central support plate, the detection probe, and the support probe are all made of stainless steel.

10. A method for in-situ detection of shallow seabed environmental effects, characterized in that, The implementation is carried out using the in-situ detection device for shallow seabed environmental effects as described in any one of claims 1-9, including: The in-situ detection device for shallow seabed environmental effects was lowered to the seabed, and the support probe and detection probe of the in-situ detection device for shallow seabed environmental effects were inserted into the shallow seabed strata. A closed reaction vessel collects near-seabed water into its internal hollow cavity; The geochemical detection system detects near-seabed water in a sealed reaction vessel and the strata into which the detection probe is inserted. The data storage and transmission response system stores the detection data from the geochemical detection system and transmits the detection data to the data receiving and response terminal. After the detection is completed, the support probe and detection probe of the in-situ detection device for shallow seabed environmental effects are retrieved from the shallow seabed strata, thus completing the recovery of the in-situ detection device for shallow seabed environmental effects.

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