Preprints
https://doi.org/10.5194/hess-2021-380
https://doi.org/10.5194/hess-2021-380

  26 Aug 2021

26 Aug 2021

Review status: this preprint is currently under review for the journal HESS.

Advances in the Hydraulic Interpretation of Water Wells Using Flowmeter Logs

Jesús Díaz-Curiel1, Barbara Biosca1, Lucía Arévalo-Lomas1, María J. Miguel2, and Natalia Caparrini3 Jesús Díaz-Curiel et al.
  • 1Department of Energy and Fuels Systems, School of Mines and Energy, Universidad Politécnica de Madrid. Madrid, 28003, Spain
  • 2Gobierno de España – Ministerio de Ciencia e Innovación. Madrid, 28046, Spain
  • 3Department of Natural Resources and Environmental Engineering, School of Mining Engineering, Universidad de Vigo. Pontevedra, 36310, Spain

Abstract. This paper reports on the methodology developed for a new hydraulic interpretation of flowmeter logs, allowing a better characterization of continental hydrological basins. In the course of a flowmeter log, different flow stretches are established mostly corresponding to permeable layers (aquifers), among which there are other stretches mainly corresponding to less permeable layers (aquitards). In such hydrological basins of sufficient thickness, these flow stretches may not have the same hydraulic head. This fact brings about the need for a new hydraulic interpretation that provides the actual distribution of horizontal permeability throughout the aquifer at depth. The modified hydraulic interpretation developed in this study focuses on the differences of the effective pressure gradient (considered as the difference between the hydraulic head in the well and the hydraulic head of each stretch) experienced by the different flow stretches along the well, due to the existence of different hydraulic heads. The methodology has been developed starting from a water well located in a multilayered aquifer within the so-named Madrid Basin (the NW part of the continental basin of the Tajo River), located in the centre of the Iberian Peninsula. In this well, a step-drawdown pumping test was conducted, in which the pumping rate versus drawdown and the specific capacity versus drawdown showed discrepancies with Darcian behaviour and an exponent of the Jacob equation of less than 1. Flowmeter logs were then recorded for different discharge rates and pump depths; the resulting water input from deeper permeable layers did not appear to show the expected relation with respect to drawdown. With the proposed methodology the results comply with the expected linearity and the cited discrepancies are solved.

Jesús Díaz-Curiel et al.

Status: open (until 21 Oct 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on hess-2021-380', Frederick L Paillet, 01 Sep 2021 reply

Jesús Díaz-Curiel et al.

Data sets

Spinner Flowmeter JESÚS DÍAZ CURIEL https://data.mendeley.com/datasets/gx8dwgvygn/1

Jesús Díaz-Curiel et al.

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Short summary
A methodology is developed for a new hydraulic characterization of continental hydrological basins. For this purpose, the division of wells into flow stretches with different hydraulic behaviour is made according to the results of the flowmeter, supposing the hypothesis hydraulic head of the deepest flow stretches of the well do not necessarily match the head showed by the overall well.