CETCO - Pioneers in the Treatment of Oilfield Wastewater

CETCO Oilfield Services Company specialises in the removal of hydrocarbons and other contaminants from oilfield wastewater streams produced during oil and gas operations.

CETCO handle and treat waste fluids for discharge directly into the environment meeting current and future legislation. We use technologically advanced, cost-effective environmental systems and products designed to treat a wide variety of oilfield waste streams produced. For example, completion fluids, acid flowbacks, well test returns and produced water treatment, among others.

CETCO's highly trained service personnel optimise equipment to ensure our customers remain compliant with overboard water quality regulations while reducing waste disposal costs. CETCO can provide turnkey engineered solutions to a huge variety of environmental problems faced in the oil & gas industry and has particular experience in devising treatment solutions for novel applications.

CRUDESORB® ADSORPTION MEDIA

CrudeSorb® is a proprietary adsorption media based on resin, polymer and clay technology. It has been proven to be extremely efficient at removing oil, grease and soluble organics from water.

CRUDESEP®AF PATENTED SEPARATION UNIT

The CETCO CrudeSep®AF unit is a vertical separator vessel which typically operates at near atmospheric pressure. The technology utilises patented internal structure design to induce active flow patterns in the body of fluid to enhance the separation of dissimilar specific gravity components.

CETCO technology has been used effectively for the following applications:

• Temporary and permanent produced water treatment
• Treatment of acid flow-backs, completion fluids and other aqueous rig waste streams
• Clean up of hydro-test and platform / pipeline decommissioning fluids
• Waste minimisation of oil-based drilling mud and brine / seawater filtration
• Bilge and ballast water polishing
• Deck drainage polishing
• Cooling / heating medium treatment
• Produced water treatment

CrudeSorb media and CrudeSepAF wastewater treatment technologies have been specifically designed for the offshore oil and gas industry.

CASE STUDY 1 - PRODUCED WATER TREATMENT FOR BP

BP was required to take its produced water degasser on the Schiehallion FPSO offline for essential upgrade work.

Without a replacement technology BP was potentially faced with a production shutdown during repairs. CETCO offered its CrudeSep® technology to BP as a temporary De-gasser vessel.

CETCO mobilised a 48in diameter vessel CrudeSep® skid to handle up to 40,000bbls/d of produced water. CETCO's scope of work was to remove gas and ensure all produced water discharged overboard met the environmental discharge limit concentration of 40ppm.

BP informed CETCO that historically a large amount of oil wet solids are returned through the Schiehallion produced water system which contributes to oil in water handling problems. A benefit of the CrudeSep® is its excellent solids removal capabilities. Solids removal in addition to oil removal ensured that produced water discharged overboard from the CrudeSep® remained on average 30ppm. The total volume of solids was decreased by over 98% from inlet to outlet.

CASE STUDY 2 - PRODUCED WATER TREATMENT FOR SHELL

CETCO supplied its CrudeSep® technology on the Shell UK-operated Auk platform in the final quarter of 2005, following a process of successful trial work between the companies. CETCO supplied a custom designed dual 18in vessel CrudeSep® IGF skid along with manpower to treat up to 3,000bbls/d of produced water. Utilising this technology has allowed Shell to discharge 30ppm OIW overboard from Auk. Operations are expected to continue well into 2006.