Discrepencies in Apparent Resistivity on a Uniform Half-Space

DC and IP
1

Hi all,
I am trying to perform a DC resistivity forward simulation on a uniform half-space with a resistivity of 5000 Ohm.m. I am using a dipole-dipole survey (a=1, n=16).

In my results, the calculated apparent resistivity is far from the expected uniform 5000 Ohm.m. I have tested this using both a TensorMesh and a TreeMesh, but the fluctuations persist.

I am wondering if the issue lies in my mesh design or my simulation setup.

Thanks in advance

dc-forward_tree.ipynb (91.8 KB)

dc-forward_tensor.ipynb (16.9 KB)