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Joint Refraction and Reflection Tomography for Velocity Model Building

June 09, 2022
11:00 AM CT

Presented by:  Ike Imala, Principal Technical Specialist - Processing and Imaging
Featured technology:  AspenTech SSE tomography applications


Abstract

This presentation shows a joint refraction and reflection-tomographic method for building velocity models for onshore surveys. In the workflow, we first perform refraction tomography to derive a near-surface velocity depth model. Then we combine the near-surface model with an initial deeper subsurface model. Taking the combined model as a starting model, we go through a joint refraction and reflection tomographic process to build the model for imaging. During the tomography, the near-surface model and subsurface models are jointly updated. Shallow anisotropy is also accommodated during the inversion. Results of the method show a geologically plausible model that flattens PSDM gathers.


Biography

Ike Imala, Principal Technical Specialist - Processing and Imaging

Ike Imala joined the company in 2013 and is currently part of the processing and Imaging team, engaged in consulting with clients, providing software training, technical support/mentoring, and optimization of Geophysical workflows.  He previously worked with Halliburton as a microseismic geophysicist providing real-time fracture behavior and geometry of the created fracture.  At AspenTech SSE, he  applies his 8 years of technical experience to the work he does with processing and imaging applications. Ike received his Bachelor of Science degree in Physics before continuing to the University of Texas at Dallas, where he earned his Master’s degree in Geosciences.