CN110793752A - Device and method for testing field underground water connectivity - Google Patents
Device and method for testing field underground water connectivity Download PDFInfo
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- CN110793752A CN110793752A CN201911058279.8A CN201911058279A CN110793752A CN 110793752 A CN110793752 A CN 110793752A CN 201911058279 A CN201911058279 A CN 201911058279A CN 110793752 A CN110793752 A CN 110793752A
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Abstract
The invention discloses a device and a method for testing the connectivity of field underground water, which comprises a gas production pressurization mechanism, a valve, a pressure sensor, a flow sensor, a communicator, a controller, a packer and a bubbler, wherein the valve, the pressure sensor and the flow sensor are arranged on the upper side of a well lid of an injection well; gas produced by the gas booster mechanism can pass through valves, packers and bubblers into the injection well. The invention can prevent exogenous chemical tracer from entering underground water, and can indicate the connectivity of hydrogeological parameters such as the flow speed, the flow direction and the like of the underground water.
Description
Technical Field
The invention relates to the field of underground water science, in particular to a device and a method for testing field underground water connectivity.
Background
In the field of groundwater science, groundwater connectivity testing is an important testing means for mastering hydrogeological parameters such as groundwater connectivity, flow speed, flow direction and the like, and a method of throwing a tracer at a certain upstream place and sampling and detecting the concentration of the tracer in water at a plurality of monitoring points at the downstream is generally adopted. However, in the process of researching groundwater hydrogeological parameters, many research sites are located in places with dense population or important water sources, even some low-toxicity tracers are limited to be used, and the fluorescent tracers are easy to cause color change of local groundwater to cause panic of residents. Therefore, the inventors considered that the conventional method of administering chemical tracers is gradually unsuitable for areas with densely populated or important water sources, and that such underground water connectivity tests are necessary.
Disclosure of Invention
In order to solve the problem that the conventional method for adding the chemical tracer is not suitable for areas with densely populated people or important water source areas, the invention provides a field connectivity test method which can prevent the exogenous chemical tracer from entering underground water and can indicate hydrogeological parameters such as the flow speed and the flow direction of the underground water. The method adopts a gas phase fluid in natural air to act on an indicator, and adopts a method of monitoring gas and gas content to determine the flow speed and the flow direction of groundwater.
The invention aims to provide a field underground water connectivity testing device.
The invention also provides a method for testing the field underground water connectivity.
The invention discloses a field underground water connectivity testing device which comprises a gas production pressurization mechanism, a valve, a pressure sensor, a flow sensor, a communicator, a controller, a packer and a bubbler, wherein the valve, the pressure sensor and the flow sensor are arranged on the upper side of a well lid of an injection well, the packer and the bubbler are arranged on the lower side of the well lid of the injection well, the gas production pressurization mechanism is communicated with the valve, the controller is connected with the valve, and the pressure sensor and the flow sensor are connected with the controller through the communicator; gas produced by the gas booster mechanism can pass through valves, packers and bubblers into the injection well.
Further, the gas production pressurization mechanism is an air pump.
Further, the valve comprises an overflow valve and a pressure reduction flow limiting valve which are connected.
Further, the communicator is a wired communicator or a wireless communicator.
Further, when the communicator is a wired communicator, the communicator is connected with the flow sensor and the pressure sensor through wires, and the communicator is connected with the controller through wires.
Further, when the communicator is a wireless communicator, the communicator is connected with the flow sensor and the pressure sensor through wires, and the communicator is connected with the controller in a wireless connection mode.
Further, still include the pipe, the mechanism, valve, pressure sensor, flow sensor, communicator, controller and the bubbler all install or connect in the pipe.
Further, the packer is installed below the water surface of the injection well; the bubbler is mounted to the underside of the packer.
The invention also discloses a method for testing the open-air underground water connectivity, wherein gas enters a aquifer from an injection well through a guide pipe, a valve, a pressure sensor, a flow sensor, a well cover, a packer and a bubbler, once the gas enters the injection well, the pressure sensor sends a corresponding pressure rise signal, and the communicator transmits the pressure rise signal to a controller for recording. Then the gas enters the monitoring well through the aquifer, once the gas enters the monitoring well, the gas pressure in the monitoring well rises, so that the gas pressure in the monitoring well is slightly larger than the atmospheric pressure, the controller controls the valve of the monitoring well to be opened, the gas is continuously and stably discharged, at the moment, the pressure sensor and the flow sensor are continuously communicated and recorded with the controller through the communicator, meanwhile, the discharged gas sample is periodically taken, the content of the gas component is analyzed, and the total amount of the gas in the monitoring well is indicated by combining the data signals of the pressure sensor and the flow sensor.
Further, a plurality of monitoring wells are selected in an investigation research area to implement the method for testing the field underground water connectivity, when the indicating gas is not detected in the plurality of monitoring wells, the underground water in the investigation direction is not communicated with the injection well, otherwise, the underground water is communicated.
Compared with the prior art, the invention has the following advantages:
1. the method can be implemented only by modifying the traditional hydrological monitoring well or water well to a certain extent, and particularly only by adding the field underground water connectivity testing device into the injection well and the monitoring well, and the field underground water connectivity testing device can avoid the influence of chemical reagents on the quality of underground water, better protect the ecological environment of underground water and is an environment-friendly field connectivity testing method.
2. The traditional test method needs to invest a large amount of chemical reagents at one time, the cost is high, the chemical tracer is avoided being used as a consumable material, the related equipment can be recycled, and in addition, the adopted gas can be directly obtained from the air through the air pump, so the test cost is greatly reduced.
3. According to the method, the pressure sensor and the flow sensor are used for assisting in judging the gas trace, so that the labor investment can be reduced, the method is different from the traditional testing method in that a large amount of detection cost is consumed due to the fact that regular sampling detection is needed, and the initial reaching time can be missed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic view showing the structure of the apparatus shown in example 1.
In the figure, 1-a gas production pressurization mechanism; 2-a pressure-reducing flow-limiting valve; 3-an overflow valve; 4-a pressure sensor; 5-a flow sensor; 6-well cover; 7-cementing a circular ring; 8-a catheter; 9-water level; 10-a packer; 11-an aqueous layer; 12-a bubbler; 13-predicting groundwater flow direction; 14-a wireless communicator; 15-a controller; i-an injection well; II-monitoring well.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, in order to solve the problem that the conventional method for adding the chemical tracer is not suitable for areas with dense population or important water source areas, the invention provides a field connectivity test method which can prevent the exogenous chemical tracer from entering underground water and can indicate hydrogeological parameters such as the flow rate and the flow direction of the underground water. The method adopts a gas phase fluid action indicator in natural air and adopts a method for monitoring gas and gas content to determine the flow speed and the flow direction of groundwater, and the invention is further explained by combining the attached drawings and the specific implementation mode.
Example 1
Firstly, the embodiment discloses a field underground water connectivity testing device, which comprises a gas production pressurization mechanism 1, a valve, a pressure sensor 4, a flow sensor 5, a communicator, a controller 15, a packer 10 and a bubbler 12, wherein the valve, the pressure sensor 4 and the flow sensor 5 are installed on the upper side of a well lid 6 of an injection well I, the packer 10 and the bubbler 12 are installed on the lower side of the well lid 6 of the injection well I, the gas production pressurization mechanism 1 is communicated with the valve, the controller 15 is connected with the valve, and the pressure sensor 4 and the flow sensor 5 are connected with the controller 15 through the communicator; gas produced by the gas production pressurization mechanism 1 can enter the injection well I through the valve, the packer 10 and the bubbler 12; it is understood that the injection well I in this embodiment is an existing injection well I opened for field groundwater connectivity testing, and is not a device specific to this embodiment.
It should be noted that the valves in this embodiment include a pressure-reducing flow-limiting valve 2 and a relief valve 3.
It will be appreciated that both the injection well I and the monitoring well II in this embodiment are provided with cementing rings 7.
The gas making supercharging mechanism 1 is an air pump. The air pump is used as a component capable of inputting air, and the function of the air pump is to provide an air source for the field underground water connectivity testing device in the embodiment, so that the air pump is selected in the embodiment and the requirement of the air pump can be met by pushing the air into the aquifer 11.
The valve comprises an overflow valve 3 and a pressure reduction flow limiting valve 2 which are connected. This is a common device in the art, and it is not necessary to describe here, and it is still to be explained that the relief valve 3 and the pressure reducing restriction valve 2 in this embodiment are connected to the controller 15, so it is necessary to adopt a model supporting the connection controller 15.
The communicator is a wired communicator or a wireless communicator 14.
It is to be understood that the wired communicator in this embodiment may be a router or a switch or a bus of a PC, the wireless communicator 14 in this embodiment may be a wireless signal transmitter, such as a radio frequency signal transmitter or a bluetooth signal transmitter, and the connections between the wired communicator/wireless communicator 14 and the pressure sensor 4/flow sensor 5 in this embodiment are well known to those skilled in the art and will not be described herein again.
The present embodiment uses the wireless communicator 14 in a particular implementation to achieve a more flexible connection.
When the communicator is a wired communicator, the communicator is connected with the flow sensor 5 and the pressure sensor 4 by a wire, and the communicator is connected with the controller 15 by a wire.
When the communicator is a wireless communicator 14, the communicator includes a wireless transmitter and a wireless receiver, the wireless transmitter is connected with the flow sensor 5 and the pressure sensor 4 through wires, and the wireless receiver is connected with a controller 15.
And the device also comprises a conduit 8, wherein the gas production pressurization mechanism 1, the valve, the pressure sensor 4, the flow sensor 5, the communicator, the controller 15 and the bubbler 12 are installed or connected to the conduit 8.
The packer 10 is installed below the water surface 9 of the injection well I; the bubbler 12 is mounted to the underside of the packer 10.
Specifically, the packer 10 is placed below the ground water level to prevent the upward migration of gas; the bubbler 12 is positioned at the aquifer 11 to allow the gas to disperse in the groundwater and to accelerate the process of the gas entering the aquifer 11 with the groundwater.
The controller 15 in this embodiment is a PC, and in other embodiments, the controller may be an MCU or a PLC.
Example 2
The embodiment discloses a method for testing the connectivity of field underground water, wherein gas enters an aquifer 11 from an injection well I through a valve, a pressure sensor 4, a flow sensor 5, a well cover 6, a packer 10 and a bubbler 12 through a conduit 8, once the gas enters a monitoring well II, the pressure sensor 4 sends a corresponding pressure rising signal, the pressure rising signal is transmitted to a controller 15 through a communicator, then the controller 15 controls the valve in the monitoring well II to be opened, so that the gas pressure in the well is slightly higher than the atmospheric pressure, at the moment, the pressure sensor 4 and the flow sensor 5 in the monitoring well II continuously communicate with the controller 15 through the communicator, and meanwhile, gas samples are taken periodically and the content of gas components is analyzed, and the total amount of the gas indicated in the monitoring well II is combined with the data signals of the pressure sensor 4 and the flow sensor 5. It is understood that the monitoring well II in this embodiment is also prior art.
Further, a plurality of monitoring wells II are selected in the investigation research area to implement the method for testing the connectivity of the field underground water, when the indicating gas is not detected in the plurality of monitoring wells II, the underground water in the investigation direction is not communicated with the injection well, otherwise, the underground water is communicated.
It can be understood that, in this embodiment, the pressure sensor 4 in the injection well I continuously transmits a pressure signal to the controller 15, the flow sensor 5 continuously transmits a flow signal to the controller 15, the pressure signal is reflected by the pressure applied to the wall of the conduit 8, since the conduit 8 is communicated with the air pump, the measured specific value is the air pressure in the conduit 8, the flow signal is reflected by the flow rate of the gas flowing in the conduit 8, if the gas pressure in the monitoring well II is slightly higher than the atmospheric pressure, the pressure signal continuously transmitted by the pressure sensor 4 is higher than the atmospheric pressure, and the flow signal continuously transmitted by the flow sensor 5 is higher than zero, it indicates that the gas flows in the monitoring well II, and the monitoring well II is communicated with the aquifer of the injection well I.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A field underground water connectivity test device is characterized by comprising a gas production pressurization mechanism, a valve, a pressure sensor, a flow sensor, a communicator, a controller, a packer and a bubbler, wherein the valve, the pressure sensor and the flow sensor are arranged on the upper side of a well lid of an injection well, the packer and the bubbler are arranged on the lower side of the well lid of the injection well, the gas production pressurization mechanism is communicated with the valve, the controller is connected with the valve, and the pressure sensor and the flow sensor are connected with the controller through the communicator; gas produced by the gas booster mechanism can pass through valves, packers and bubblers into the injection well.
2. The field ground water connectivity test device of claim 1, wherein the gas pressurization mechanism is a gas pump.
3. A field ground water connectivity test device according to claim 1, wherein the valve includes an overflow valve and a pressure reducing restriction valve connected.
4. The field ground water connectivity test device of claim 1, wherein the communicator is a wired communicator or a wireless communicator.
5. The field ground water connectivity test device of claim 4, wherein when the communicator is a wired communicator, the communicator is connected with the flow sensor and the pressure sensor through wires, and the communicator is connected with the controller through wires.
6. The field ground water connectivity test device of claim 4, wherein when the communicator is a wireless communicator, the communicator is connected with the flow sensor and the pressure sensor through wires, and the communicator is connected with the controller through a wireless connection.
7. The field groundwater connectivity test device of claim 1, further comprising a conduit, wherein the gas pressurization mechanism, the valve, the pressure sensor, the flow sensor, the communicator, the controller, and the bubbler are all mounted or connected to the conduit.
8. A field groundwater connectivity test device according to claim 7, wherein the packer is installed below the surface of an injection well; the bubbler is mounted to the underside of the packer.
9. A field underground water connectivity test method according to any one of claims 1 to 8, wherein gas enters an aquifer from an injection well through a conduit, a valve, a pressure sensor, a flow sensor, a well cover, a packer and a bubbler, once the gas enters a monitoring well, the pressure sensor sends a corresponding pressure rise signal, the pressure rise signal is transmitted to a controller through a communicator, then the controller controls the monitoring well valve to be opened, so that the gas pressure in the well is slightly higher than the atmospheric pressure, at the moment, the pressure sensor and the flow sensor continuously communicate with the controller through the communicator for recording, and meanwhile, a gas sample is periodically taken and the content of gas components is analyzed, and the total amount of the gas in the monitoring well is indicated by combining the data signals of the pressure sensor and the flow sensor.
10. A field groundwater connectivity test method according to claim 9, wherein a plurality of monitoring wells are selected in a research area for implementing the field groundwater connectivity test method according to claim 9, when no indicating gas is detected in any of the plurality of monitoring wells, it is determined that there is no communication between groundwater in the research azimuth and the injection well, otherwise, there is communication.
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| CN201911058279.8A CN110793752B (en) | 2019-10-25 | 2019-10-25 | Device and method for testing field underground water connectivity |
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| CN114018312A (en) * | 2021-11-07 | 2022-02-08 | 天津市地质研究和海洋地质中心 | Integrated device and method for underground water environment monitoring well investigation |
| CN114486637A (en) * | 2022-01-24 | 2022-05-13 | 湖北煤炭地质一二五队 | Open-air groundwater connectivity investigation testing arrangement |
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