CN110593859A - Method for testing layered water stop effect of underground water monitoring well - Google Patents
Method for testing layered water stop effect of underground water monitoring well Download PDFInfo
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- CN110593859A CN110593859A CN201910988579.XA CN201910988579A CN110593859A CN 110593859 A CN110593859 A CN 110593859A CN 201910988579 A CN201910988579 A CN 201910988579A CN 110593859 A CN110593859 A CN 110593859A
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- water
- monitoring well
- pumping test
- water level
- stopping effect
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The invention relates to a method for testing the layered water stop effect of a groundwater monitoring well, which comprises the following steps: water pumping test; the water pumping test is used for synchronously measuring the water level of each layered monitoring well; respectively taking 1 water sample for water quality total analysis 5-10 minutes after the water pumping test is started, when the dynamic water level tends to be stable and before the water pumping test is finished; if the layered water level is not changed and the water quality results of the 3 water samples are basically consistent, the water stopping effect is judged to be good; otherwise, the water stopping effect is judged to be poor. The problem of mention among the above background art that monitoring well stagnant water is bad and cause the monitoring well inefficacy, lead to the scurrying of different aquifer waters is solved, solve the bad problem of monitoring well layering stagnant water before the operation.
Description
Technical Field
The invention belongs to the field of detection of a layered water stop effect of an underground water monitoring well, and particularly relates to a method for detecting a layered water stop effect of the underground water monitoring well.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The underground water is not only an important water supply source for urban and rural life and industrial and agricultural water in China, but also an important component of a natural ecological system and the environment. In order to scientifically and reasonably develop and utilize and protect underground water resources and ecological environment, the dynamic monitoring work of underground water needs to be enhanced. The construction of groundwater monitoring well then is the important basis of carrying out groundwater dynamic monitoring, and the well quality that becomes of monitoring well has direct influence to the monitoring achievement, and especially monitoring well stagnant water effect is not good, leads to different aquifer scurrying, and the monitoring well has just lost its value and the meaning of monitoring, not only can cause economic loss, and more serious is probably to cause the scurrying pollution problem.
Disclosure of Invention
In order to overcome the problems, the invention provides a method for testing the layered water stop effect of an underground water monitoring well, which aims to solve the problems of failure of the monitoring well and layer crossing of water of different aquifers caused by poor water stop of the monitoring well in the background art and solve the problem of poor layered water stop of the monitoring well before operation.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a method for testing the layered water stop effect of a groundwater monitoring well comprises the following steps:
water pumping test;
the water pumping test is used for synchronously measuring the water level of each layered monitoring well;
respectively taking 1 water sample for water quality total analysis 5-10 minutes after the water pumping test is started, when the dynamic water level tends to be stable and before the water pumping test is finished;
if the layered water level is not changed and the water quality results of the 3 water samples are basically consistent, the water stopping effect is judged to be good; otherwise, the water stopping effect is judged to be poor.
The existing pumping test aims to obtain relevant parameters and data of an aquifer, is used for evaluating the water-rich property of the aquifer, knowing the water chemistry characteristics of the aquifer and the like, and is not enough for judging aquifer channeling monitoring; the experimental purpose of drawing water of this application is when obtaining above test data, and deeper purpose is to examining aquifer stagnant water effect, through the synchronous observation of in-process inspection hole water level of drawing water, water sample interval sample chemical examination contrast, judges that draw water hole stagnant water effect and scurry layer water source, then can directly take remedial measure to the scurry layer position, need not to carry out the full hole again stagnant water to can save plenty of time and expense.
The method for detecting the layered water stopping effect of the underground water monitoring well is provided by continuously exploring and summarizing experience in the well forming process of the monitoring well, the source of the channeling water can be effectively judged, targeted remedial measures can be carried out on channeling positions, and the problem of poor water stopping of the monitoring well is eliminated before monitoring operation. In some embodiments, in the pumping test, when the difference of the water yield changes within several continuous hours is less than 5% of the average water yield, the water yield can be considered to be stable, so as to ensure accurate and efficient monitoring.
In the application, the term that the dynamic water level tends to be stable refers to that the water level is observed at intervals of half an hour, and the error of the observation is not more than +/-2 centimeters.
In the application, "before the pumping test is finished" means that the pumping test reaches the stable time required by the specification.
In some embodiments, the water level is measured three times continuously with a half hour interval, with a tolerance of no more than ± 2 cm, when the centrifugal pump or the deep well pump is used, and the water level is considered to have stabilized.
In some embodiments, when an air compressor is used, the water level is continuously measured three times, and the error does not exceed +/-10 centimeters every half hour, so that the water level is considered to be stable.
In some embodiments, the water level observation error should not exceed ± 1 cm to obtain better observation accuracy.
In some embodiments, the observation of the water level and the water yield is performed every 5 minutes at the beginning of the pumping test and every 30 minutes after the measurement of 30 minutes, so as to improve the accuracy of the observation and the monitoring accuracy.
In some embodiments, the water quality complete analysis includes physical, chemical and bacterial analysis, and the change of the water quality can be measured more accurately by monitoring the data of the three aspects.
In some embodiments, the number of water level drops in the pumping test is not less than two, so as to accurately calculate the unit water yield and the maximum water yield of the well.
In some embodiments, the water level drop times of the water pumping test are three times, which is more beneficial to curve drawing and water yield calculation.
In some embodiments, the water pumping test also observes the static water level, the dynamic water level and the recovery water level, the water temperature and the air temperature, the water yield, the sand content in the water, and the water quality change in the water pumping period. To accurately monitor various aspects of the groundwater.
The invention has the beneficial effects that:
(1) the stratified water stopping effect is checked by performing a water pumping test and water quality sample collection and analysis test when the monitoring well is formed, water quality test data and observation hole water level dynamics are compared at the same time, the source of the water channeling is judged, targeted remedial measures can be performed on the water channeling part, the bad water stopping problem of the monitoring well is eliminated before monitoring operation, the quality and the practical service life of the monitoring well are greatly improved, and the problem of water channeling caused by bad water stopping is avoided. The technical method is applied to the well forming process of the underground water layered monitoring well constructed in our unit, and a good effect is achieved.
(2) The operation method is simple, high in accuracy, universal and easy for large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a flow chart of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application 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 example embodiments according to the present application. 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 introduced by the background technology, the problem that different aquifers jump due to poor water stopping effect of the existing monitoring well is solved. Therefore, the invention provides a method for testing the layered water stop effect of the underground water monitoring well, which comprises a water pumping test, water level measurement, water sample collection and water quality full analysis.
The water level measurement is to synchronously measure each layered monitoring well during a pumping test; the sample collection and analysis test is to respectively take 1 water sample for water quality complete analysis 5-10 minutes after the water pumping test starts, when the dynamic water level tends to be stable (observed at intervals of half an hour for water level, the error is not more than +/-2 cm) and before the water pumping test is finished (the stable time when the water pumping test reaches the standard requirement).
Preferably, the water level measurement is synchronous measurement of each layered monitoring well.
Preferably, the sample collection and analysis test is a full analysis test by respectively taking one water quality sample 5-10 minutes after the start of the pumping test, after the dynamic water level tends to be stable and before the end of the pumping test.
The technical solution of the present application will be described below with specific examples.
Example 1:
the technical scheme is applied to checking the water stopping effect of the underground water monitoring hole of the ground settlement investigation monitoring project in the Jinan city, the water level of the shallow water monitoring hole is synchronously observed and recorded in the process of the deep water monitoring hole pumping test, and water quality full-analysis samples are respectively taken from the pumping hole in 10 minutes after the test is started, when the water level is reduced to be stable and 30 minutes before the pumping test is finished, and are timely and hermetically sent to a laboratory for test analysis. The water level of shallow water is found to have slight fluctuation in the water pumping test process (because a plurality of shallow water agricultural wells are arranged around the monitoring holes), so that the water level fluctuation of the shallow monitoring holes cannot be eliminated and is caused by the water pumping of the deep monitoring holes, the water quality of the deep water is found to have larger change compared with the water quality when a well is just formed by analyzing the water quality of the samples in the water pumping process, the content of anions and cations is increased when the well is just formed, and the mineralization content is also increased by 200 mg/L (the mineralization of the shallow water is far higher than that of the deep water); comparing water samples collected after the water pumping test is started, when the water level is stable and before the test is finished, finding that the water quality is unstable, comprehensively judging that deep water is communicated with shallow water by comprehensively observing the water level, and showing that the two monitoring wells have bad water stopping effect. And in the later stage, the shallow water part on the upper part of the deep monitoring well is subjected to targeted water stopping according to the inspection result, and the water is pumped again for verification, so that the purpose of water stopping is achieved, and the normal operation of the monitoring well is ensured.
It can be seen that the above method of the present application is feasible and provides excellent results.
Example 2:
a method for testing the layered water stop effect of an underground water monitoring well comprises a water pumping test, water level measurement, water sample collection and water quality total analysis. The water level measurement is to synchronously measure each layered monitoring well during a pumping test; the sample collection and analysis test is to respectively adopt 1 water sample for water quality complete analysis 5-10 minutes after the water pumping test is started, when the dynamic water level tends to be stable and before the water pumping test is finished.
Example 3
A method for testing the layered water stop effect of an underground water monitoring well comprises a water pumping test, water level measurement, water sample collection and water quality total analysis. The water level measurement is to synchronously measure each layered monitoring well during a pumping test; the sample collection and analysis test is to respectively adopt 1 water sample for water quality complete analysis 5-10 minutes after the water pumping test is started, when the dynamic water level tends to be stable and before the water pumping test is finished.
And the water level measurement is synchronous measurement of each layered monitoring well.
Example 4
A method for testing the layered water stop effect of an underground water monitoring well comprises a water pumping test, water level measurement, water sample collection and water quality total analysis. The water level measurement is to synchronously measure each layered monitoring well during a pumping test; the sample collection and analysis test is to respectively adopt 1 water sample for water quality complete analysis 5-10 minutes after the water pumping test is started, when the dynamic water level tends to be stable and before the water pumping test is finished.
The sample collection and analysis test is to respectively take a water quality sample for full analysis test 5-10 minutes after the water pumping test starts, after the dynamic water level tends to be stable and before the water pumping test is finished.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. 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. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for detecting the layered water stop effect of a groundwater monitoring well is characterized by comprising the following steps:
water pumping test;
the water pumping test is used for synchronously measuring the water level of each layered monitoring well;
respectively taking 1 water sample for water quality total analysis 5-10 minutes after the water pumping test is started, when the dynamic water level tends to be stable and before the water pumping test is finished;
if the layered water level is not changed and the water quality results of the 3 water samples are basically consistent, the water stopping effect is judged to be good; otherwise, the water stopping effect is judged to be poor.
2. The method for testing the stratified water-stopping effect of the underground water monitoring well as claimed in claim 1, wherein in the pumping test, when the difference of the water yield changes within a plurality of continuous hours and is less than 5% of the average water yield, the water yield is considered to be stable.
3. The method for testing the stratified water-stopping effect of the underground water monitoring well as claimed in claim 2, wherein the water level is continuously measured three times with an error of not more than ± 2 cm at intervals of half an hour when a centrifugal pump or a deep well pump is used.
4. The method for testing the stratified water-stopping effect of the underground water monitoring well as claimed in claim 2, wherein the water level is continuously measured three times by using the air compressor, and the error is not more than +/-10 cm at intervals of half an hour, so that the water level is considered to be stable.
5. The method for inspecting the stratified water-stopping effect of the underground water monitoring well according to claim 1, wherein the observation error of the water level should not exceed +/-1 cm.
6. The method for testing the stratified water-stopping effect of the underground water monitoring well as defined in claim 1, wherein the observation of the water level and the water yield is performed every 5 minutes at the beginning of the pumping test and every 30 minutes after the measurement of 30 minutes.
7. The method for testing the stratified water-stopping effect of the underground water monitoring well as recited in claim 1, wherein the water quality full analysis comprises physical, chemical and bacterial analysis.
8. The method for testing the stratified water-stopping effect of the underground water monitoring well as claimed in claim 1, wherein the water pumping test water level is decreased for not less than two times.
9. The method for testing the stratified water-stopping effect of the underground water monitoring well as claimed in claim 8, wherein the water pumping test water level is decreased three times.
10. The method for inspecting the stratified water-stopping effect of the underground water monitoring well as claimed in claim 1, wherein the water pumping test is also observed for a static water level, a dynamic water level, a recovery water level, a water temperature, an air temperature, a water yield, a sand content in water, and a water quality change in a water pumping period.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108468528A (en) * | 2018-05-18 | 2018-08-31 | 河北省地矿局国土资源勘查中心 | Fourth-series deep well layered water pumping and stopping device and water pumping and stopping method thereof |
| CN108867716A (en) * | 2018-06-12 | 2018-11-23 | 武汉丰达地质工程有限公司 | A kind of connection test method of drawing water of lowering heartn type water-stop curtain |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468528A (en) * | 2018-05-18 | 2018-08-31 | 河北省地矿局国土资源勘查中心 | Fourth-series deep well layered water pumping and stopping device and water pumping and stopping method thereof |
| CN108867716A (en) * | 2018-06-12 | 2018-11-23 | 武汉丰达地质工程有限公司 | A kind of connection test method of drawing water of lowering heartn type water-stop curtain |
Non-Patent Citations (1)
| Title |
|---|
| 王明明: "多层监测井成井工艺与止水材料研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
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