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Separation Solutions for the Entire Oil & Gas Lifecycle

From production wells to refineries, Mercer delivers engineered oil/water separation systems that keep operations efficient, compliant, and safe.

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INDUSTRY INSIGHT

Industry Overview

For more than four decades, Mercer International has been the go-to engineering partner for E&P’s, oil field service companies,, refiners, and transport operators who need consistent performance from their oil/water separation systems. From offshore platforms to tank farms, Mercer’s enhanced-gravity separators automatically streamline oil and solids removal, helping clients protect or eliminate secondary and tertiary treatment steps downstream.

Built on field-proven designs like the Multi-Pack™ Coalescer System and Compliance Master™ Separator, Mercer systems deliver measurable uptime, reduced maintenance, and fast ROI in the harshest oilfield and refinery environments.

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ENERGY INDUSTRIES

Tailored Solutions for Every Stage of Oil & Gas Operations

Upstream – Exploration & Production

Treat produced water, well pad runoff, and flowback on the fly—without bulky gun-barrels, storage tanks or frequent cleanouts.

Midstream – Pipeline & Storage Operations

Handle terminal drainage, sump water, and compressor station leaks for regulatory-ready discharge.

Downstream – Refining & Petrochemical

Replace aging concrete API tanks and automate oil and solids removal for modern refinery performance.

Oil Sands & SAG-D – Steam Assisted Gravity Drainage

Manage oily wastewater from steam recovery and open-pit mining while reclaiming valuable hydrocarbons.

Saltwater Disposal Wells

Protect injection wells and recover saleable oil before disposal.

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Why Mercer

Engineered for Harsh Environments, Proven in the Field

APPLICATION AREAS

Typical Applications

Transformer Bays & Substations

Capture dielectric oil leaks, rain-induced sheen, and containment drainage automatically.

Turbine & Generator Lubrication Systems

Remove free oils and particulates from turbine hall drainage, lube-oil sumps, and equipment washdowns.

Fuel Handling & Tank Farms

Treat oily runoff from diesel, fuel-oil, and turbine-fuel storage areas.

Cooling & Boiler House Drainage

Eliminate oil carryover from cooling water, condenser areas, and auxiliary equipment.

Coal Handling & Conveyor Areas

Manage oily solids, coal fines, and hydrocarbon sheens before discharge or reuse.

Stormwater & Regulated Outfalls

Handle first-flush loads and variable storm events with stable separation performance.

Featured Projects

Trusted by Producers ,Refiners, and Product Movers Worldwide

Project A

Offshore retrofit reduced oil carryover by 90%

Project B

Terminal upgrade achieved full EPA compliance on stormwater discharges

Project C

SAG-D pilot validated Mercer design for 5× higher flow capacity

Regulatory & Compliance Support

Mercer systems meet or exceed API 421/422, EPA 40 CFR Part 112, and regional discharge limits. Each unit ships with full documentation packages for engineering submittals and permitting. Pilot and field validation data are also available to verify compliance performance.

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Frequently Asked Questions

Q.

How are Mercer separators different from standard API/CPI units?

A.

Mercer systems capture much smaller droplets, manage velocity per API 421, resist fouling, and automate oil/solids removal — performance API/CPI tanks cannot match.

Q.

Can Mercer systems replace gun-barrels, frac tanks, or ASTs?

A.

Yes. Mercer units separate in real time, eliminating feet of sludge buildup, reducing storage needs, and recovering more sellable oil.

Q.

How do Mercer systems handle surfactants, polymers, or high-solids produced water?

A.

Engineered coalescers maintain rise paths, resist blinding, and control shear — keeping performance stable even with chemically aggressive O&G waters.

Q.

Are Mercer systems compatible with SWD and injection-well programs?

A.

Yes. Removing oil and solids upstream protects injection wells, reduces formation plugging, and lowers disposal risk.

Q.

What API 421 requirements do Mercer systems address?

A.

They meet or exceed API 421 for <3 ft/min velocity, <60-micron droplet capture, and outperform the 150-micron limit of open-weir designs.

Q.

Do Mercer systems help reduce emissions?

A.

Yes. Closed tops, vapor-capture options, and automated skimming minimize VOC release and operator exposure.

Q.

How automated are Mercer systems?

A.

Automated oil recovery, timed solids purging, and SCADA integration reduce operator intervention and keep treatment predictable.

Q.

Can Mercer units handle heavy, paraffinic, or viscous crudes?

A.

Yes. Optimized plate spacing and controlled flow prevent media fouling and maintain separation efficiency.

Q.

Are Mercer systems suitable for SAGD and Oil Sands waters?

A.

Yes. They tolerate high temperatures, abrasive fines, and refractory oils while maintaining consistent performance.

Q.

Can Mercer manage refinery streams like desalter brine or slop oil?

A.

Yes. They handle high-shear droplets, solids, and fluctuating loads that overwhelm CPI tanks and chain-and-flight basins.

Q.

What maintenance savings can operators expect?

A.

Less media fouling, fewer cleanouts, lower hauling costs, and reduced pump wear — typically 50–80% maintenance reduction.

Q.

Do Mercer systems require less space than traditional separators?

A.

Yes. Most systems use roughly ¼ the footprint of API or CPI designs.

Q.

Can Mercer support produced-water recycling or reuse?

A.

Absolutely — improved removal of oils and solids stabilizes water for downstream polishing and reuse processes.

Q.

How quickly can a Mercer system be deployed?

A.

Modular designs install quickly, and retrofits can often be dropped into existing basins without major civil work.