A client was experiencing increasing water cut in their high deviation well. They wanted to identify the appropriate zones for water shut-off operations.
The well had previously been logged using standard centreline production logging sensors, but owing to the high levels of water production and stratified flow regime, these sensors were not able to resolve the small volume of hydrocarbons flowing on the high side of the well from the remaining volume of water. As a result, it was not possible to provide conclusive analysis and a new approach was required.
The client approached us to help develop a solution to provide more accurate and insightful results. Our team proposed running an array production logging survey, utilising the industry-leading Multiple Array Production Suite (MAPS) technology, and performing the analysis of this more detailed dataset.
The MAPS tools provide a more comprehensive and 3D view of the fluids in the well compared to traditional centreline tools. By using this leading-edge technology, we were able to identify all the fluids in the expected stratigraphic flow regime of the well bore.
The array sensors were able to identify the exact location of the water entry, as well as the hydrocarbon contributions.
The client was able to identify the water entry points and take appropriate action for remedial water shut-off. This resulted in a significant increase in hydrocarbon production.
This demonstrated the value of the use of array tools over standard centreline fluid identifiers in complex or stratified flow.