Shallow groundwater small-diameter cluster monitoring well and well completion method thereof

Abstract

The invention discloses a shallow groundwater small-diameter cluster monitoring well and a well completion method thereof. The monitoring well comprises an outer pipe and monitoring well pipes, wherein a plurality of monitoring well pipes are correspondingly arranged according to the number of water-bearing layers in a monitoring section; the plurality of monitoring well pipes are inserted into aninner cavity of the outer pipe; each monitoring well pipe is arranged corresponding to one layer of water-bearing layer; and the bottom end of each monitoring well pipe is positioned in the corresponding water-bearing layer. The well completion method comprises the following steps of: step 1, firstly, carrying out reconnaissance drilling; step 2, carrying out drilling construction by adopting a one-diameter to bottom mode; step 3, carrying out clear water slurry replacement; step 4, installing an outer pipe centralizer during pipe descending; step 5, carrying out layered packing; step 6, carrying out vibration well washing; step 7, carrying out secondary well completion; step 8, carrying out layered packing; step 9, carrying out vibration well washing; step 10, measuring the water level;and step 11, installing a protective cover. The shallow groundwater small-diameter cluster monitoring well has the beneficial effects that reliable guarantee is provided for shallow groundwater monitoring and pollution source monitoring, and the construction blank of the shallow groundwater cluster monitoring well is filled.

Description

technical field [0001] The invention relates to a cluster monitoring well and a well forming method thereof, in particular to a shallow groundwater small-diameter cluster monitoring well and a well forming method thereof. Background technique [0002] With the gradual development of society, the monitoring of water resource pollution has been paid more and more attention, and the environmental monitoring well is the main means to monitor the pollution of groundwater resources. Existing monitoring wells have a good monitoring effect on areas with few aquifer layers and large thicknesses. However, with the improvement of monitoring requirements for pollution sources, existing monitoring wells are becoming more and more difficult to meet the work requirements. At present, the commonly used nested monitoring wells can monitor up to five horizons, and the continuous multi-channel monitoring wells can monitor up to seven horizons, and there are many problems in the field construct...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to solve the problem that there are fewer monitoring well pipes in the traditional nest monitoring well, especially for shallow groundwater that cannot be monitored in multiple layers;

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