Dye Dispersion Studies
Numerical Modeling

Lorax provides numerical modeling services to the offshore oil & gas industry by simulating the transport and dispersal of Produced Water and Well Cuttings to answer questions related to operational and regulatory requirements.

Produced water originates on offshore oil production platforms when water that has been injected into a well is recovered and treated for removal of contaminants. The treated water is then discharged below the ocean surface at an elevated temperature, and may contain trace amounts of hydrocarbons and other contaminants as well as dissolved air. The initial behaviour of the produced pater plume is complex and not well understood in some cases. It is known in one instance, for example, that some of the produced water reaches the surface while some descends to depths of 80 m or more.

Lorax designed and conducted the first field program in the North Atlantic designed specifically to measure the far-field dilution of produced water. Fluorescent rhodamine dye was added to the produced water stream onboard the FPSO oil production and storage vessel at the Terra Nova well site. Data collected during this two day study were subsequently used to verify the Lorax Produced Water Dispersion Model.

Well Cuttings consist of small particles of rock produced during the drilling of offshore wells. These particles are recovered and transported to the surface where they are cleaned to remove hydrocarbons before being discharged back into the ocean. Lorax models the fate of these particles using a sediment transport and deposition model developed in-house specifically for the off-shore oil industry. The model determines the pattern and thickness of well cuttings deposited onto the ocean bottom using real or modeled currents