Statoil and Rosneft have commenced well testing at the North-Komsomolskoye field onshore Russia.
The companies have implemented a pilot operation of the horizontal wells with an average starting flowrate of 75t per day.
A spokesman said during well testing the companies are planning to undertake a complex of studies including hydrodynamic and tracer studies.
Laboratory investigations of the surface oil samples will also be implemented.
The data is expected to be used as the companies look at the strategy of the full-scale development of the North Komsomolskoye field.
Last month, Rosneft agreed to extend its contract for oil supplies in Poland.