PROCESS OF CHARACTERISTIC CHANGE OF SPILLED CRUDE OIL AND SIMPLIFIED MEASUREMENT TECHNIQUE FOR VISCOSITY

The fate of spilled oil in sea area is governed by complex interrelated physico-chemical processes that depend on the oil properties, hydrodynamic conditions and environmental conditions. Evaporation begins immediately after spill, and it is the main process which caused the loss in oil volume and the increases in viscosity and density during weathering. It is very important to select the recovery method to clarify the change in viscosity and density of spilled crude oil. In this paper, the authors describe the process of characteristic change of spilled oil, and newly developed simplified measurement technique of viscosity.