BCGS Technical Talk – June 2021

Speaker: Mehrdad Darijani, PhD. CEO & Founder, Geotexera Inc.

Title: Independent, joint and constrained inversions using unstructured meshes

Date: Thursday, June 10, 2021

Time: 4:30pm – 5:30pm PDT

Location: Webinar video conference via Zoom.

Bio:

Mehrdad Darijani is CEO and founder of Geotexera Inc., a company that provides geophysical modelling and inversion services and products (software). Mehrdad holds a PhD in geophysics from Memorial University of Newfoundland, completed under the supervision of Dr. Colin Farquharson. He has over 10 years of experience with the modelling and inversion of geophysical data.

Abstract:

Independent, joint and constrained inversions using unstructured meshes

At Geotexera, we collaborate with academia not only to use the most advanced tools and methods for improving the quality of results, but also to always keep them up to date. We have the support and aid of Dr. Colin Farquharson (professor in the Department of Earth Sciences at Memorial University of Newfoundland) and Dr. Peter Lelièvre (assistant professor in the Mathematics and Computer Science Department at Mount Allison University) as our advisors. We use the software MAGNUM, which they developed in cooperation with their research groups.

The software MAGNUM has been used in many projects so far. It has been developed to be the most fully functional forward modelling and inversion software that provides many tools and methods for the inversion of different types of geophysical data using only a single platform. It is capable of doing independent, joint (using linear, correlation, fuzzy c-mean, cross-gradient, and Gaussian methods), constrained (using bounds and reference models), clustering, and MVI (for remanent-affected magnetic data using Cartesian and spherical formulations) inversions or any combination of them such as constrained joint, constrained clustering and so on. It also works with mesh-based, surface geometry, and lithological approaches. At this point, the software inverts magnetic (TMI, amplitude, and vector-components), gravity, gravity gradiometry, seismic refraction (first arrival travel-times), and muography data. In the near future, IP/DC and EM methods will be added to the software.

Geotexera is the first company that uses unstructured (triangular and tetrahedral) meshes in all its geophysical modelling and inversion services and products. The unstructured meshes enable us to easily and accurately add high-resolution topography, borehole information, geological contacts, and surfaces (e.g., those generated by Leapfrog) to our models to obtain reliable results. They can be extremely helpful when we are working with constrained inversions.

Webinar:

A recording of this webinar is available on our Youtube channel.