Reproduce: UBC DCIP OcTree#

Inverting Pole-Dipole IP Data over a Conductive (and Chargeable) and a Resistive Block#

Here, we invert pole-dipole IP data collected over a conductive and a resistive block. The conductive block is also chargeable. We invert for an intrinsic chargeability model using a least-squares inversion approach.

For the true model, the background conductivity \(\sigma_0\) = 0.01 S/m. The conductor has a conductivity of \(\sigma_c\) = 0.1 S/m and an intrinsic chargeability of 0.1 V/V. The resistor has a conductivity of \(\sigma_r\) = 0.001 S/m and is non-chargeable. Both blocks are oriented along the Northing direction and have x, y and z dimensions of 400 m, 1600 m and 320 m. Both blocks are buried at a depth of 160 m.

The data being inverted were generated using the UBC-GIF DCIP OcTree. Synthetic apparent chargeability data were simulated with a pole-dipole configuration. The survey consisted of 9 West-East survey lines, each with a length of 2000 m. The line spacing was 250 m and the electrode spacing was 100 m. Gaussian noise with a standard deviation of 1e-6 V + 5% the absolute value were added to each datum. Uncertainties of 1e-6 V + 5% were assigned to the data for inversion.

UBC-GIF DCIP OcTree: DCIP OcTree is a voxel cell DC/IP forward modeling and inversion package developed by the UBC Geophysical Inversion Facility. This software is proprietary and can ONLY be acquired through appropriate commerical licenses. The numerical approach of the forward simulation is described in the online manual’s theory section. If you have a valid license, there are instructions for reproducing the results (add link).

Running the Inversion#

Step 1: Acquiring a commercial or academic license.#

  • Explain and link to where you would get licenses. Make ABSOLUTELY CLEAR we don’t just give out the licenses willy-nilly.

Step 2: Downloading and extracting assets#

  • Link and instructions for download

Step 3: Running the forward modeling executable#

  • Brief description of what files are needed

  • Link to the manual page where we run the forward simulation