GeoPilotPumpPilot DocumentationOpen PumpPilot

Getting started

Open a published pumping test, see the fitted solution against the readings, compare it with the published answer and save your work.

PumpPilot analyses pumping tests in your browser. It fits the classic analytical solutions (Theis, Hantush-Jacob, Papadopulos-Cooper and Neuman) to drawdown readings from any number of wells, and has the Cooper-Jacob, Theis recovery and step-drawdown methods. Nothing needs to be installed, and your readings stay on your computer: the calculations run in the browser tab.

The calculations are those of pumptest, an open-source library (MIT licence) whose results are checked against AQTESOLV and welltestpy on published field tests. The first visit takes up to a minute while PumpPilot gets ready; later visits open in a few seconds.

The first test

PumpPilot opens on the Sioux Flats test from the AQTESOLV manual: one pumping well and three observation wells at 30.5, 61 and 122 m. It fits the Theis solution as soon as it is ready. The workspace has three parts:

  • Left: the test (rate, well radius, thickness), the wells with a tick box each to include or leave out, and the readings of the selected well.
  • Middle: drawdown against time since pumping started, on log-log axes. Markers are readings, solid lines the solution, and hollow markers and dashed lines the derivative.
  • Right: the solution, its parameters with their standard errors, the fit statistics, the published answer for an example, and any cautions about the fit.

For Sioux Flats the fit gives a transmissivity of about 4310 m2/d against the 4308 m2/d AQTESOLV reported. Hover over a marker to read its time and drawdown.

Other examples

File > Examples lists seven published tests. Each opens with the solution its publisher used, is fitted, and shows the published parameters beside the fit:

  • Gridley, Sioux Flats and Texas Hill (leaky): from the AQTESOLV manual, with the AQTESOLV parameters reported by Yang (2020).
  • Lauswiesen B2 to B5: four tests at a research site near Tuebingen, Germany, each with 6300 readings in each of five wells (Leven 2020, CC BY-SA 4.0), with the welltestpy parameters of Mueller et al. (2022).

Fit and compare

  1. Choose a solution in the Solution box on the right, or from the Solution menu.
  2. Press Automatic fit or F5.
  3. Read the parameters, the RMSE and the cautions under Fit.
  4. To see which solution suits the test best, choose Match > Compare solutions....

Save your work

File > Save (Ctrl+S) downloads the test as a .pumppilot file: the readings, units, solution, parameters and fit. File > Open... (Ctrl+O) opens one again. Signed in, you can also keep tests in the cloud; see Reports, files and the cloud.

Edits can be undone with Edit > Undo (Ctrl+Z) and redone with Edit > Redo (Ctrl+Y).

Where next

Next: Entering a test