BACKGROUND

Operations, such as geophysical surveying, drilling, logging, well completion, and production, are typically performed to locate and gather valuable downhole fluids. The subterranean assets are not limited to hydrocarbons such as oil, throughout this document, the terms “oilfield” and “oilfield operation” may be used interchangeably with the terms “field” and “field operation” to refer to a site (e.g., reservoir) where any type of valuable fluids or minerals can be found and the activities required to extract them. The terms may also refer to sites where substances are deposited or stored by injecting the substances into the surface using boreholes and the operations associated with this process. Further, the term “field operation” refers to a field operation associated with a field, including activities related to field planning, wellbore drilling, wellbore completion, and/or production using the wellbore.

One or more aspects of the field operation may be facilitated by detecting a geologic fault where a reservoir may be located in the subterranean formation.

SUMMARY

In general, in one aspect, an embodiment includes detecting an unknown fault in a target seismic volume. Detecting an unknown fault in a target seismic volume includes generating a number of patches from a training seismic volume that is separate from the target seismic volume, where a patch includes a set of training areas. Detecting an unknown fault in a target seismic volume further includes generating a label for assigning to the patch, where the label represents a subset, of the set of training areas, intersected by a known fault specified by a user in the training seismic volume, and training, during a training phase and based at least on the label and the training seismic volume, a machine learning model. Detecting an unknown fault in a target seismic volume further includes, generating, by applying the machine learning model to the target seismic volume during a prediction phase subsequent to the training phase, a result to identify the unknown fault in the target seismic volume.

Other aspects will be apparent from the following description and the appended claims.

