ExxonMobil licensed its multi-zone stimulation technology (MZST) well treatment process to a subsidiary of Weatherford International Ltd. The MZST process can be used to rapidly and reliably stimulate multiple zones in a single operation, claimed ExxonMobil.

The MZST process can be particularly beneficial for hydraulic fracturing operations in tight gas, shale gas and coal bed methane wells that target multiple reservoir zones, thick reservoir sections or long reservoir intervals where multiple stimulation treatments are required, added the company.