Montage Resources’ concerns
Bond logs from conventionally cemented and completed wells indicated severe channeling behind the casing of multistage horizontal wells, which can reduce fracturing efficiency as fluids migrate into unintended zones.
What they tried first
Industry-accepted cementing best practices, including running centralizers.
What Schlumberger recommended
Add Fulcrum technology to the well cement to react with leftover drilling fluid; assess performance with the Isolation Scanner cement evaluation service.
Montage Resources engineers agreed to cement two horizontal wells conventionally and then cement two comparable neighboring wells with the same design except for the addition of the Fulcrum technology. In order to evaluate the difference, it was agreed to run Isolation Scanner service on one well that was cemented conventionally and on another well cemented with Fulcrum technology. The well cemented with Fulcrum technology showed better bonding and isolation both on the impedance boundary condition and the sonic tool.