Terralog provided CRI services to Statoil from 2007 to 2016.

This offshore project was based on a dedicated injection well for drilling waste disposal in the North Sea. Two different techniques of CRI injection operation have evolved:

• the ‘direct sand’ injection;
• ‘bottom shale’ injection approach.

Volumes of waste (slurry or slop material) using either technique varies on a daily basis and is dependent on the drilling operations needs. The CRI well is completed in a target zone (a deep formation characterized as a thick, permeable, unconsolidated sand.

Proper implementation of ‘Best Practices’ for this CRI operation was used to assess/address/resolve injection issues in a timely manner. Accordingly, the technical support work used on this project was able to meet the operational-drilling and zero discharge objectives of the client by ensuring concurrent, controlled, and reliable CRI operations.