Offshore Borehole Logging

The shallow section offshore from mud line to the surface casing shoe, often placed at around 800’/250m, can be the section of a well with the least detailed geologic information. This section is the location of a number of geohazards with the potential for well loss or delay in completion. These geohazards include unexpected overpressures, gas hydrates, shallow gas, and variable physical soil properties due to presence of faulting or mass transport deposits.

Geotechnical boreholes are drilled to investigate these issues.  Employing wireline logging, such as is always done for target reservoir identification and definition , can also greatly aid the understanding of shallow section properties.

Specialized slimline tools with the ability to log both in the casing and below the bit are now available. AOA’s VP Adrian Digby was the originator of the concept of shallow section logging offshore and is a leading proponent of the interpretation of the geophysical data obtainable from boreholes in the shallow section and integration with the traditional geotechnical data required for safe field development.

Onshore Well Logging

AOA provides design advice, QA/QC and data interpretation of borehole logging programs for a number of uses onshore. These uses including: geotechnical investigations for civil engineering projects, mining, water and geothermal energy developments plus new and exciting developments including carbon dioxide sequestration and deep waste disposal.

Contact Adrian Digby +1 713-532-2624
Email Adrian