Method and device for performing water pumping test on multiple water-containing layers in single deep drill hole

Abstract

The invention discloses a method and device for performing a water pumping test on multiple water-containing layers in a single deep drill hole, and belongs to the technical field of drilling. The method for performing the water pumping test on the multiple water-containing layers in the single deep drill hole comprises the following steps: S1, packing a target water-containing layer vertically; S2, reducing lifting and drilling hole diameter variable quantity of a submersible pump; S3, observing water level; and S4, retracting a packer. The device for performing the water pumping test on the multiple water-containing layers in the single deep drill hole comprises a drilling packer, a water pressure sensor, a secondary instrument, a data processor, a pressure pump or a steel cylinder, a tension valve for retracting the packer, an submersible electric pump and a floral tube drill stem. The method disclosed by the invention is more scientific and reasonable. The invention provides a low-cost technology and equipment capable of performing the water pumping test on the multiple water-containing layers in case of enabling drilling to not reduce or enabling drilling to slightly reduce. A drilling process is simplified, and the purposes of shortening a construction period and reducing cost are realized.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a method for pumping water from multiple aquifers in a single deep borehole; [0002] The invention relates to the technical field of drilling, in particular to a device for pumping water of multiple aquifers in a single deep drilling. Background technique [0003] Borehole pumping test is a necessary project for hydrogeological exploration, resource geological exploration, production supplementary exploration, water source geological exploration and engineering geological exploration, and the pumping test of multiple aquifers in a single borehole is the most common project in the above-mentioned exploration projects , for a long time, the multi-layer pumping test is mostly completed by the method of changing the diameter of the borehole, that is, after the pumping of a set aquifer is completed, the diameter of the borehole is changed once, and the next time the casing is stoppe...

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Problems solved by technology

[0003] Borehole pumping test is a necessary project for hydrogeological exploration, resource geological exploration, production supplementary exploration, water source geological exploration and engineering geological exploration, and the pumping test of multiple aquifers in a single borehole is the most common project in the above-mentioned exploration projects , for a long time, the multi-layer pumping test is mostly completed by the method of changing the diameter of the borehole, that is, after the pumping of a set aquifer is completed, the diameter of the borehole is changed once, and the next time the casing is stopped, and then the new diameter is drilled. For the next target aquifer, start a new pumping test. For pumping tests in multiple aquifers, the borehole needs to be drilled for multiple diameter reductions and water stops. This will result in a large hole diameter, complicated construction technology, and high cost. If the water stop fails, the pumping test data will be unreliable. In order to avoid these problems, the hydrogeological technicians have implemented a mixed pumping test, that is, a single-hole diameter is used for mixed pumping of all exposed aquifers , and then allocate water according to the thickness of different aquifers or other hydrogeological indicators. Because the hydrogeological parameters of different aquifers are very different, and there are many aquifers that cannot be counted, the error of the data is too large. In order to solve this pr

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