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| Application of logging curves in hydrogeological exploration of middle Ordovician |
| Ma Linkai |
| The First Hydrogeological Team, China Coal Geology Administration, Handan 056000, China |
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Abstract Coal mining in the lower carboniferous is often affected by the Ordovician aquifer. In the hydrogeological exploration work of water supplement for coal mine prevention and control, it is necessary to identify the Ordovician aquifer to prevent water damage and improve the utilization rate of resources. By using logging curves, the lithology of middle Ordovician was analyzed and judged, the strata were divided reasonably, the stratigraphic interfaces of middle Ordovician are judged, and the borehole logging section of Ordovician limestone formation was formed accurately. According to the diffusion curve of salinization, the aquifer can be clearly and accurately judged, and the recharge relationship between aquifers in the formation can be judged according to the morphological characteristics of the diffusion curve. The combination of formation logging and salinization diffusion curves accurately delineates the buried depth and thickness of the aquifer. It provided good basic data for hydrogeological parameters and scientific data for hydrogeological conditions analysis.
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