Nope. If there is a seep and if they are monitoring it Qualatative measurement is all they can hope for.
IF, and this is a big if, they knew the size of the exit hole in the casing the volume could be estimated from the pressure and opening relationship. Just a choke equation IF they knew the pressure and the size of the hole.
They haven’t been able to do this in the past even when they had a hole of known size (the riser) and pressures upstream and downstream of the hole so I doubt they can now. Missed some great opportunities to get solid data when they joyfully whacked the riser off.
These people should never play chess because they can’t figure out more than one move at a time.
How could this scenario complicate the Relief Well operation ?