Petrel Platform

Bayesian Linearized Inversion

Deterministic direct elastic seismic inversion with GPU support.

Overview

Bayesian linearized angle stack inversion resulting in velocities or impedances and density. The method is direct, i.e. it does not use iterations, resulting in one of the fastest inversions available. The plugin supports random line as the trace gate and a horizon as stratigraphic grid. Integrated quality control is available for real time visualization of the results compared to well logs.

Features

Choose to invert your angle stacked seismic data within a stratigraphic grid combined with a random line, horizontal correlation and vertical correlation. Select the desired wells to compare in real time the results with the well logs. Use the computational power of the GPU present at your workstation, yielding 4 to 7 times faster results compared to the CPU.

Specifications

Fast inversion method without iterations Parallel computation using all available processing capacity Integrated quality control interface Graphic Processing Unit (GPU) support for 4x to 7x speedup Support for using random lines as trace gate Stratigraphic grid built based on a horizon Horizontal correlation imposed at the result Fast parametrization using the quality control interface

Fast and cost effective seismic inversion

The plugin provides a deterministic elastic seismic inversion for modelling 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 similar to a constrained sparse spike inversion, but obtained 6x to 10x faster.

Stratigraphic grid

The user is able to select a horizon to run the inversion on a stratigraphic grid, built parallel to the horizon. This option is especially useful for running the inversion with horizontal correlation.

Random line trace gate

This option allows to select a Seismic Line 3D as a gate for the traces to be inverted. It was built for quick testing and performing quality control while varying the inversion parameters.

Integrated Quality Control

The user selects the wells for comparing the inversion with their respective well logs. The properties are defined using the global well logs, so the plugin can identify the logs in each well and plot them accordingly.

Quality control plot

Well logs of the selected wells and their inversion counterparts are plotted. The user can select to view each well separately, see the correlation coefficient and the crossplots for the logs and the inversion. The plots update in real time when a new inversion in run.

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Petrel Platform

Bayesian Linearized Inversion

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ECCN

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Challenges

Lifecycle Conventional