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What are the Experiences and Considerations for Drilling a Spa Well?

July 26,2023

What are the common considerations for drilling hot spring wells? Aidu Hui test according to years of work experience as well as reference materials to give you an analysis and organization.

1. Detailed Study of Local Hydrogeological Conditions.

The risk is high if the site is arbitrarily located without understanding the hydrogeology and without studying the hydrogeological conditions. Hot spring drilling can be investigated and studied in the following three aspects.

1. Study of topography.

Topographic and geomorphological conditions determine the conditions of groundwater recharge and discharge, control the weathering conditions of the rocks and influence changes in groundwater abundance and depletion. There should be a basin area for reservoir restoration and a supply area for well drilling. The reasoning is the same. If the lithologic conditions are the same, it is easier to form wells in low-lying terrain or terrain that favors water catchment. However, some small plains and depressions tend to be dominated by siltstones, which are easily weathered and stripped to form lowlands but have poor groundwater.

2. Study the water content of rocks.

In general, in hot spring drilling the rocks can be divided into igneous, metamorphic, and sedimentary rocks according to the cause, and the breakdown is very complicated. No matter what the cause is, the feeling of hammering is "hard", "soft" and "brittle". Brittle rocks, limestone, and other soluble rocks are easier to form wells.

3. Study the development of cracks in rocks.

Fracture development near fault fracture zones. Inclined rocks are more likely to develop than horizontal rocks.

2. To Choose the Physical Exploration Method Suitable for the Local Geological Conditions

At present, the main method of physical exploration is electrical exploration. The electric exploration method is divided into the artificial electric field method and the natural electric field method. There are many specific methods, such as compound electric logging, high-density electric logging, vertical electric bathymetry, four-base symmetric profiling, joint profiling, and excitation base method. Each method has its applicable conditions and disturbing factors and needs to be adapted to the local conditions.

Well, drilling is a water conservancy project with high risk and many failures. Many people think that drilling is "drilling an eye, under a tube", seems simple, the actual technical content is high, involving hydrogeology, physical prospecting to find water, well technology, supporting pump selection, and other aspects of knowledge, if the parties involved to master some scientific knowledge, to reduce the blindness, you can greatly improve the success rate of drilling.

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