CN115144023B - Sampling device and method for monitoring seawater invasion by using existing water well - Google Patents
Sampling device and method for monitoring seawater invasion by using existing water well Download PDFInfo
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- CN115144023B CN115144023B CN202210691953.1A CN202210691953A CN115144023B CN 115144023 B CN115144023 B CN 115144023B CN 202210691953 A CN202210691953 A CN 202210691953A CN 115144023 B CN115144023 B CN 115144023B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000013535 sea water Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000005070 sampling Methods 0.000 title claims abstract description 57
- 230000009545 invasion Effects 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 239000011521 glass Substances 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 235000020681 well water Nutrition 0.000 claims description 6
- 239000002349 well water Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/26—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Biochemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sampling device and a method for monitoring seawater intrusion by utilizing an existing water well, wherein the sampling device comprises a wellhead fixing frame, a resistivity system and a sampling system, wherein the wellhead fixing frame consists of a frame, an electrode cable fixing clamp, a large-line collector, a collector switch line collector and a round level, the top of the frame is provided with the sampling system, the sampling system consists of a first pulley, a second pulley, a temperature and PH sensor, a sampler switch, a sampler counterweight and a temperature and pH value display device, and the resistivity system consists of a high-density electric meter or a parallel electric meter, an electrode cable and an encrypted acquisition electrode cable. The invention solves the problem that the sampling depth of the pressurized-water well is fixed, but the seawater is possibly not invaded into the aquifer, so that the seawater invasion degree is not accurately judged, and meanwhile, the existing pressurized-water well can be fully utilized for seawater invasion monitoring, and the monitoring cost is reduced.
Description
Technical Field
The invention relates to the field of monitoring seawater invasion by resistivity technology and a water chemistry method, in particular to a sampling device and a sampling method for monitoring seawater invasion by utilizing an existing water well.
Background
At present, the seawater intrusion monitoring technology regulation specifies a method of using hydrologic geochemistry, namely, an existing well or a well drilling water sampling is utilized to test the water sampling, and the seawater intrusion degree (no intrusion, mild intrusion and serious intrusion) is determined.
A large number of pressurized-water wells exist in most rural areas along Jiangsu coasts, and the pressurized-water wells can be fully utilized for seawater intrusion monitoring. However, a pressurized-water well is usually established and the formation from which the well is drilled is unknown. In the past, the sampling is to collect a water sample by using pressurized water from a pressurized water well, and the water outlet point of the pressurized water is fixed and is the depth of the bottom of the pressurized water pipe, but not necessarily the position where seawater invades the aquifer. The accuracy of monitoring seawater intrusion for sampling cannot be guaranteed.
There are many areas in China which try to monitor seawater invasion by using a resistivity method, the resistivity method is mainly based on the apparent difference of resistivity before and after seawater invasion, but the resistivity obtained by the method is apparent resistivity, and it is difficult to accurately divide the seawater invasion area according to the concentration of chloride ions like hydrologic geochemistry. Therefore, the current international seawater intrusion standard is also obtained by using a hydrological geochemistry method, and a sampling device and a sampling method for monitoring seawater intrusion by using the existing water well are provided.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a sampling device for monitoring seawater intrusion by using an existing water well so as to solve the problems of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an utilize sampling device of existing well monitoring sea water invasion, includes well head mount, resistivity system and sampling system, the well head mount comprises frame, electrode cable fixation clamp, big line collector, collector switch line collector and circular level ware, the top of frame is equipped with sampling system, sampling system comprises first pulley, second pulley, temperature and PH sensor, sampler switch, sampler counter weight and temperature and pH value display device, the resistivity system comprises high density electric method appearance or parallel electric method appearance, electrode cable and encryption collection electrode cable.
As a preferable technical scheme of the invention, the wellhead fixing frame is arranged at the top of the wellhead, and the first pulley and the second pulley are arranged at the top of the wellhead fixing frame.
As a preferable technical scheme of the invention, one end of a large wire on the large wire collector is connected with a temperature and PH sensor on the sampler through a first pulley, and the other end of the large wire on the large wire collector is connected with a temperature and PH value display device.
As a preferable technical scheme of the invention, the collector switch wire on the collector switch wire collector is connected with the sampler switch on the sampler through the second pulley.
As a preferable technical scheme of the invention, the cable on the electrode cable is connected with a high-density electric instrument or a parallel electric instrument through a third pulley, and the high-density electric instrument or the parallel electric instrument is connected with the encrypted acquisition electrode cable through the cable.
As a preferable technical scheme of the invention, the electrode cable comprises two parts, wherein the outer layer is a cylinder made of organic glass, the inner layer is an electric instrument cable, each 1 meter section of the electrode cable is used for sealing one side of the bottommost section, and the other side is a screw male port; a section for a wellhead is close to the upper part, is provided with a round level and is vertical to the electrode cable; each section in the middle is connected by male and female screws, a sealing gasket is arranged at the joint of the female ports, a copper rod with the diameter of 2mm is used as an electrode, the length of 2cm, one electrode per 10cm is vertically inserted into an organic glass cylinder and sealed, an inner layer is an electrical instrument cable, and an electrode joint is arranged at each 5cm and connected with the electrode penetrated by the organic glass.
As a preferable technical scheme of the invention, the electrode cable with the bottom end of 1 meter is an electrode cable with all wires, the length scale is arranged on the cable wire, the electrode is a copper rod with the diameter of 2mm, the length of 2cm, one electrode per 2cm is vertically inserted into an organic glass cylinder and is sealed, the inner layer is an electrical instrument cable, and the electrode connection part is arranged at each 2cm and is connected with the electrode penetrated by the organic glass.
As a preferable technical scheme of the invention, the capacity of the sampler is 3000 milliliters, and the sampler counterweight is mounted on the bottom of the sampler through bolts.
A sampling method for monitoring seawater intrusion by using an existing water well, which utilizes an electrometer to determine the depth of seawater intrusion into a water-containing layer, and utilizes a sampler to collect a water sample and measure the temperature and the pH value near the intrusion water-containing layer, comprises the following specific steps:
s1, electrode cable layout: connecting the electrode cable sections well, slowly placing the electrode cable sections at the bottom of a well, disturbing well water as little as possible, ensuring the electrode cable to be vertical by utilizing the last round leveling device at the well head, fixing the electrode cable by utilizing an electrode cable clamp, and recording the well depth at the well head;
S2, roughly determining the seawater invasion aquifer: connecting an electrode cable to a high-density electric method or a parallel electric method instrument, standing for ten minutes to ensure that the water concentration is kept to be in a state before the electrode cable is inserted, respectively defining each four electrodes as AMNB based on a symmetrical quadrupole method, measuring to obtain apparent resistivity at AB/2, and rapidly obtaining apparent resistivity values of different water depths in a water well by using the high-density electric method or the parallel electric method instrument, wherein the most obvious change of seawater entering an immersed aquifer is the change of chloride ions, and the chloride ion change is approximately in a linear relation with the resistivity; accordingly, the position of the seawater invasion aquifer can be obtained according to the lowest apparent resistivity value;
S3, accurately determining the seawater invasion aquifer: placing the central electrode of the encryption electrode cable at the position with the lowest resistivity, connecting the central electrode to a high-density electric method or a parallel electric method instrument, standing for ten minutes, keeping the water concentration to a state before the electrode cable is inserted, respectively defining each four electrodes as AMNB based on a symmetrical quadrupole method, measuring to obtain the apparent resistivity at the position with the apparent resistivity of AB/2, and rapidly measuring to obtain an apparent resistivity value within 1m by using the high-density electric method or the parallel electric method instrument, wherein the depth corresponds to the minimum apparent resistivity value, and obtaining the position of the seawater immersed aquifer;
S4, collecting a water sample: after the seawater invasion aquifer is determined, a sampler is placed in a well by utilizing a sampling device main line and a temperature pH value sampling line, the sampler is lowered by utilizing a sampler counterweight, the 0m position of the sampler is enabled to reach the seawater invasion aquifer, the sampling device is kept still for 10 minutes, well water disturbance caused by placing the sampling device is recovered, the aquifer near the sampler can reflect water of the aquifer as far as possible, a temperature sensor and a pH value sensor are utilized for sampling the temperature of the water and the pH value of the water, a sampler switch line is pulled, a sampler switch is turned on, the water flows into the sampler, when no bubble is emitted from the water surface in the well, the sampler switch line is lowered, a sampling cover is covered by virtue of dead weight and counterweight, the collected water sample is lifted out of the water surface, and the water in the seawater invasion aquifer is completely collected.
The beneficial effects of the invention are as follows: after seawater invasion, the concentration of chloride ions is increased, the resistivity of different depths is obtained by using a resistivity method based on the approximate linear relation between the concentration of chloride ions and the resistivity, the lowest depth of the resistivity is determined as a seawater invasion aquifer, a sampler is used for carrying out geochemical analysis on a water sample, and the seawater invasion degree is determined according to an analysis result; the invention solves the problems that the sampling depth of the pressurized-water well is fixed, but the seawater is possibly not invaded into the aquifer, so that the seawater invasion degree is inaccurate, and meanwhile, the existing pressurized-water well can be fully utilized for seawater invasion monitoring, so that the monitoring cost is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: the well head mount 1, resistivity system 2, sampling system 3, frame 4, electrode cable fixation clamp 5, first pulley 6, second pulley 7, large line collector 8, collector switch line collector 9, high density electrical or parallel electrical instrument 10, electrode cable 11, encrypted collection electrode cable 12, circular collimator 13, temperature and PH sensor 14, sampler switch 15, sampler 16, sampler weight 17, temperature and PH display 18.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Examples: referring to fig. 1, the present invention provides a technical solution: the utility model provides a sampling device that utilizes existing well monitoring sea water invasion, including well head mount 1, resistivity system 2 and sampling system 3, well head mount 1 comprises frame 4, electrode cable fixation clamp 5, big line collector 8, collector switch line collector 9 and round level 13, sampling system 3 is established at the top of frame 4, sampling system 3 comprises first pulley 6, second pulley 7, temperature and PH sensor 14, sampler switch 15, sampler 16, sampler counter weight 17 and temperature and pH value display device 18, resistivity system 2 comprises high density electric method appearance or parallel electric method appearance 10, electrode cable 11 and encryption collection electrode cable 12.
The wellhead fixing frame 1 is installed at the top of the wellhead, and the first pulley 6 and the second pulley 7 are both installed on the top of the wellhead fixing frame 1.
One end of the large wire on the large wire collector 8 is connected with the temperature and PH sensor 14 on the sampler 16 through the first pulley 6, and the other end of the large wire on the large wire collector 8 is connected with the temperature and PH value display device 18.
Collector switch wire the collector switch wire on collector 9 is connected via a second pulley 7 to a sampler switch 15 on sampler 16.
The cable on the electrode cable 11 is connected with the high-density electric method instrument or parallel electric method instrument 10 through a third pulley, and the high-density electric method instrument or parallel electric method instrument 10 is connected with the encrypted acquisition electrode cable 12 through a cable.
The electrode cable 11 comprises two parts, wherein the outer layer is a cylinder made of organic glass, the inner layer is an electric instrument cable, each 1 meter section of the electrode cable is used for sealing one side of the bottommost section, and the other side of the bottommost section is a screw male port; a section for the wellhead is provided with a circular level 13 near the upper part and perpendicular to the electrode cable 11; each section in the middle is connected by male and female screws, a sealing gasket is arranged at the joint of the female ports, a copper rod with the diameter of 2mm is used as an electrode, the length of 2cm, one electrode per 10cm is vertically inserted into an organic glass cylinder and sealed, an inner layer is an electrical instrument cable, and an electrode joint is arranged at each 5cm and connected with the electrode penetrated by the organic glass.
The electrode cable with the bottom end of 1 meter is encrypted and collected, all the upper surface is provided with an electric wire, the electric wire is provided with a length scale, the electrode is a copper rod with the diameter of 2mm, the length is 2cm, one electrode per 2cm is vertically inserted into the organic glass cylinder and is sealed, the inner layer is an electric instrument cable, and the position of each 2cm is provided with an electrode connecting position and is connected with the electrode penetrating through the organic glass.
The capacity of the sampler 16 was 3000 ml, and the sampler weight 17 was mounted on the bottom of the sampler 16 by bolts.
A sampling method for monitoring seawater intrusion by using an existing water well, which utilizes an electrometer to determine the depth of seawater intrusion into a water-containing layer, and utilizes a sampler to collect a water sample and measure the temperature and the pH value near the intrusion water-containing layer, comprises the following specific steps:
s1, electrode cable layout: connecting the electrode cable sections well, slowly placing the electrode cable sections at the bottom of a well, disturbing well water as little as possible, ensuring the electrode cable to be vertical by utilizing the last round leveling device at the well head, fixing the electrode cable by utilizing an electrode cable clamp, and recording the well depth at the well head;
S2, roughly determining the seawater invasion aquifer: connecting an electrode cable to a high-density electric method or a parallel electric method instrument, standing for ten minutes to ensure that the water concentration is kept to be in a state before the electrode cable is inserted, respectively defining each four electrodes as AMNB based on a symmetrical quadrupole method, measuring to obtain apparent resistivity at AB/2, and rapidly obtaining apparent resistivity values of different water depths in a water well by using the high-density electric method or the parallel electric method instrument, wherein the most obvious change of seawater entering an immersed aquifer is the change of chloride ions, and the chloride ion change is approximately in a linear relation with the resistivity; accordingly, the position of the seawater invasion aquifer can be obtained according to the lowest apparent resistivity value;
S3, accurately determining the seawater invasion aquifer: placing the central electrode of the encryption electrode cable at the position with the lowest resistivity, connecting the central electrode to a high-density electric method or a parallel electric method instrument, standing for ten minutes, keeping the water concentration to a state before the electrode cable is inserted, respectively defining each four electrodes as AMNB based on a symmetrical quadrupole method, measuring to obtain the apparent resistivity at the position with the apparent resistivity of AB/2, and rapidly measuring to obtain an apparent resistivity value within 1m by using the high-density electric method or the parallel electric method instrument, wherein the depth corresponds to the minimum apparent resistivity value, and obtaining the position of the seawater immersed aquifer;
S4, collecting a water sample: after the seawater invasion aquifer is determined, a sampler is placed in a well by utilizing a sampling device main line and a temperature pH value sampling line, the sampler is lowered by utilizing a sampler counterweight, the 0m position of the sampler is enabled to reach the seawater invasion aquifer, the sampling device is kept still for 10 minutes, well water disturbance caused by placing the sampling device is recovered, the aquifer near the sampler can reflect water of the aquifer as far as possible, a temperature sensor and a pH value sensor are utilized for sampling the temperature of the water and the pH value of the water, a sampler switch line is pulled, a sampler switch is turned on, the water flows into the sampler, when no bubble is emitted from the water surface in the well, the sampler switch line is lowered, a sampling cover is covered by virtue of dead weight and counterweight, the collected water sample is lifted out of the water surface, and the water in the seawater invasion aquifer is completely collected.
After seawater invasion, the concentration of chloride ions is increased, the resistivity of different depths is obtained by using a resistivity method based on the approximate linear relation between the concentration of chloride ions and the resistivity, the lowest depth of the resistivity is determined as a seawater invasion aquifer, a sampler is used for performing geochemical analysis on a water sample near the seawater invasion aquifer, and the seawater invasion degree is determined according to an analysis result; the invention solves the problem that the sampling depth of the pressurized-water well is fixed, but the seawater is possibly not invaded into the aquifer, so that the seawater invasion degree is not accurately judged, and meanwhile, the existing pressurized-water well can be fully utilized for seawater invasion monitoring, so that the monitoring cost is reduced.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (7)
1. The utility model provides an utilize sampling device of existing well monitoring sea water invasion, includes well head mount (1), resistivity system (2) and sampling system (3), its characterized in that: the wellhead fixing frame (1) is composed of a frame (4), an electrode cable fixing clamp (5), a large line collector (8), a collector switch line collector (9) and a round level gauge (13), a sampling system (3) is arranged at the top of the frame (4), the sampling system (3) is composed of a first pulley (6), a second pulley (7), a temperature and PH sensor (14), a sampler switch (15), a sampler (16), a sampler counterweight (17) and a temperature and PH value display device (18), and the resistivity system (2) is composed of a high-density electrical instrument or a parallel electrical instrument (10), an electrode cable (11) and an encrypted collecting electrode cable (12);
The electrode cable (11) comprises two parts, wherein the outer layer is a cylinder made of organic glass, the inner layer is an electric instrument cable, each 1 meter section of the electrode cable is used for sealing one side of the bottommost section, and the other side of the bottommost section is a screw male port; a section for a wellhead is provided with a round level (13) near the upper part and is vertical to the electrode cable (11); each middle section is connected by a male port and a female port through screws, a sealing gasket is arranged at the joint of the female port, a copper rod with the diameter of 2mm is used as an electrode, the length of 2cm, one electrode per 10cm is vertically inserted into an organic glass cylinder and is sealed, an inner layer is an electric instrument cable, and an electrode joint is arranged at each 5cm and is connected with an electrode penetrated by organic glass;
The electrode cable with the bottom end of 1 meter is an encrypted acquisition electrode cable (12), all the upper surface is provided with an electric wire, a length scale is arranged on the electric wire, the electrode is a copper rod with the diameter of 2mm, the length of the electrode is 2cm, one electrode per 2cm is vertically inserted into an organic glass cylinder and is sealed, the inner layer is an electrical instrument cable, and the electrode joint is arranged at each 2cm and is connected with the electrode penetrated by organic glass.
2. A sampling device for monitoring seawater intrusion using an existing well as claimed in claim 1, wherein: the wellhead fixing frame (1) is arranged at the top of a wellhead, and the first pulley (6) and the second pulley (7) are arranged at the top of the wellhead fixing frame (1).
3. A sampling device for monitoring seawater intrusion using an existing well as claimed in claim 1, wherein: one end of a large wire on the large wire collector (8) is connected with a temperature and PH sensor (14) on a sampler (16) through a first pulley (6), and the other end of the large wire on the large wire collector (8) is connected with a temperature and PH value display device (18).
4. A sampling device for monitoring seawater intrusion using an existing well as claimed in claim 1, wherein: the collector switch line on the collector switch line collector (9) is connected with the sampler switch (15) on the sampler (16) through the second pulley (7).
5. A sampling device for monitoring seawater intrusion using an existing well as claimed in claim 1, wherein: the cable on the electrode cable (11) is connected with a high-density electric method instrument or a parallel electric method instrument (10) through a third pulley, and the high-density electric method instrument or the parallel electric method instrument (10) is connected with the encrypted acquisition electrode cable (12) through the cable.
6. A sampling device for monitoring seawater intrusion using an existing well as claimed in claim 1, wherein: the capacity of the sampler (16) is 3000 milliliters, and the sampler counter weight (17) is mounted on the bottom of the sampler (16) through bolts.
7. A sampling method of a sampling device for monitoring seawater intrusion using an existing well as claimed in claim 1, wherein: the depth of a seawater invasion aquifer is determined by using an electrotometer, a sampler is used for collecting a water sample near the invasion aquifer, and the temperature and the pH value are measured, and the specific steps are as follows:
s1, electrode cable layout: connecting the electrode cable sections well, slowly placing the electrode cable sections at the bottom of a well, disturbing well water as little as possible, ensuring the electrode cable to be vertical by utilizing the last round leveling device at the well head, fixing the electrode cable by utilizing an electrode cable clamp, and recording the well depth at the well head;
S2, roughly determining the seawater invasion aquifer: connecting an electrode cable to a high-density electric method or a parallel electric method instrument, standing for ten minutes to ensure that the water concentration is kept to be in a state before the electrode cable is inserted, respectively defining each four electrodes as AMNB based on a symmetrical quadrupole method, measuring to obtain apparent resistivity at the position of AB/2, and rapidly obtaining apparent resistivity values of different water depths in a water well by using the high-density electric method or the parallel electric method instrument, wherein the most obvious change of seawater invasion into an aquifer is the change of chloride ions, and the chloride ion change and the resistivity are approximately in a linear relation; accordingly, the position of the seawater invasion aquifer can be obtained according to the lowest apparent resistivity value;
S3, accurately determining the seawater invasion aquifer: placing the central electrode of the encrypted acquisition electrode cable at the position with the lowest resistivity, connecting the central electrode to a high-density electric method or a parallel electric method instrument, standing for ten minutes, enabling the water concentration to be kept to be as high as possible before the electrode cable is inserted, defining each four electrodes as AMNB based on a symmetrical quadrupole method, measuring to obtain the apparent resistivity at the position AB/2, and rapidly measuring to obtain an apparent resistivity value within 1m by using the high-density electric method or the parallel electric method instrument, wherein the depth corresponds to the minimum value of the apparent resistivity, and obtaining the position of seawater invasion aquifer;
S4, collecting a water sample: after the seawater invasion aquifer is determined, the sampler is placed in a well by utilizing a sampling device main line and a temperature pH value acquisition line, the sampler is lowered by utilizing a sampler counterweight, the 0m position of the sampler is enabled to reach the seawater invasion aquifer, the sampling device is kept still for 10 minutes, well water disturbance caused by placing the sampling device is recovered, the aquifer near the sampler can reflect the water of the aquifer as far as possible, the temperature of the water and the pH value of the water are acquired by utilizing a temperature sensor and a pH value sensor, a sampler switch line is pulled, a sampler switch is turned on, the water flows into the sampler, when no bubble is emitted from the water surface in the well, the sampler switch line is lowered, a sampling cover is covered by virtue of dead weight and counterweight, the acquired water sample is lifted out, and the water in the seawater invasion aquifer is acquired.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210691953.1A CN115144023B (en) | 2022-06-17 | 2022-06-17 | Sampling device and method for monitoring seawater invasion by using existing water well |
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| CN202210691953.1A CN115144023B (en) | 2022-06-17 | 2022-06-17 | Sampling device and method for monitoring seawater invasion by using existing water well |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793249A (en) * | 2015-04-22 | 2015-07-22 | 中国海洋大学 | Method for systematically detecting seawater intrusion |
| CN107941555A (en) * | 2017-11-20 | 2018-04-20 | 中国矿业大学 | A kind of well depthkeeping degree water-bearing layer water sampler that can determine whether underground water cross strata pollution |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6441618B2 (en) * | 2000-02-04 | 2002-08-27 | Schlumberger Technology Corporation | Method and apparatus for monitoring the advance of seawater into fresh water aquifers near coastal cities |
| JP4570242B2 (en) * | 2000-12-21 | 2010-10-27 | 株式会社鷺宮製作所 | Resistivity meter electrode |
| US20150233884A1 (en) * | 2014-02-18 | 2015-08-20 | Scott Russell Burge | Sampling and Analytical Platform for the Remote Deployment of Sensors |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793249A (en) * | 2015-04-22 | 2015-07-22 | 中国海洋大学 | Method for systematically detecting seawater intrusion |
| CN107941555A (en) * | 2017-11-20 | 2018-04-20 | 中国矿业大学 | A kind of well depthkeeping degree water-bearing layer water sampler that can determine whether underground water cross strata pollution |
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