dGB Earth Sciences

Bayesian Linear Inversion

LTrace Bayesian Linear Inversion provides a deterministic elastic seismic inversion using the linearized Bayesian methodology for estimating velocities or impedances and density. We use angle stacked seismic data - such as near, mid and far - along with low frequency models to quickly perform the inversion. The results are comparable to a constrained sparse spike inversion but are obtained 6x to 10x faster. The software implements an approximation on the horizontal continuity model, allowing the user to impose lateral correlation on the results with a low overhead.

News - Petrobras & LTrace

LTrace is pleased to announce its first R & D contract with Petrobras Reasearch Center (CENPES). LTrace is the first startup to sign a cooperation term directly with Petrobras, according to rules of the National Agency of Petroleum, Natural Gas and Biofuels (ANP). The project aims to implement machine learning techniques in the process of digital rock analysis and microtomography in the Brazilian pre-salt area.

"LTrace provides a field-proven and cost-effective solution for seismic elastic inversion."
--Dr. Daniel Maia, Reservoir Geophysicist, Karoon Gas



A suggested workflow is to perform quality control (QC) comparing the inversion results with well log data. The QC implementation enables the user to change the parameters and quickly run the inversion on a limited area, automatically updating the QC window with the new results. After defining the optimal parameters, the user can perform the inversion on the full volume.

The software uses the latest Graphics Processing Unit (GPU) technologies to accelerate the inversion processing. If the user has an NVIDIA® GPU, the inversion will be automatically processed using it. Using GPUs provides a performance gain over CPUs of 4 to 7 times in our benchmarks, depending on the model of the GPU and the vertical gate selected at the inversion.

F3 Demo + Bayesian Inversion

LTrace team prepared a sample dataset of F3 Block for the users to quickly run our Bayesian inversion. Derived from the original data provided by dGB Earth Sciences, it includes angle stacks, wavelets, background models and a sample parameters file. Click here to download the dataset.

All commercial plugins require OpendTect Pro.

More Information

OpendTect Pro Store
Technical Report
OpendTect Technology Webinar: Bayesian Seismic Inversion and Statistical Multi-trace Wavelet Estimation