Cleartron® water quality enhancement products solve many oilfield water quality problems for economical compliance with environmental obligations and regulations.
Modern oilfield operations must address many environmental and operational considerations for produced water, waterflood and subsurface disposal:
Produced water. The quality of produced water discharged overboard from offshore production systems is subject to stringent governmental regulations, as well as corporate philosophies. In U.S. waters and other offshore areas, residual oil and grease levels as low as 29 ppm are stipulated.
Waterflood and subsurface disposal. High quality water enhances reservoir life, helps maintain injectivity and reduces disposal costs for waterflooding operations and subsurface water disposal.
Sources of Poor Water Quality
Produced water quality is affected by many factors, including suspended solids and entrained or dispersed oil. Sources of these contaminants include:
- Production systems -- where complex mixtures of chemicals used to treat other production or operating problems may be found.
- Equipment -- where performance and operation, especially with variable production rates, can adversely affect water quality.
The use of properly designed, operated, and maintained equipment can significantly improve water quality. But under some conditions, reducing suspended solids and oils requires that equipment be supplemented with fit-for-purpose chemical treatment.
CTI experts solve water quality problems by first understanding the system—a critical step in determining the root cause of poor water quality. All factors are evaluated, including:
- System configuration
- Range of production conditions
- Presence and level of other treating chemicals
This evaluation determines whether a mechanical solution is possible and if it is economical. If a chemical approach is required, CTI experts determine the most cost-effective product and the appropriate application technology. The later is important because a potentially beneficial product may be ineffective if improperly applied. The product should work synergistically with the surface equipment to provide better water quality than either equipment or product can provide individually.
To achieve this level of synergy, Champion personnel recommend appropriate application technology as well as monitoring procedures to ensure best-in-class water quality management programs.
Surfatron® specialty surfactants are a diverse family of product formulations that enhance wetting and emulsify or disperse oil, water and solids.
The surfactant family includes many CTI products generally used as cleaners and dispersing, foaming and wetting agents. These chemicals have the ability to reduce the surface tension of a liquid, the interfacial tension between two immiscible liquids and the contact angle between a liquid and a solid.
- Cleaning paraffin, oily sludge or scale from perforations or downhole equipment
- Preventing swelling of water-sensitive clays (surfactant flooding)
- Increasing injection rates or decreasing injection pressures in water injection systems
- De-watering low pressure, fluid-loaded gas wells
- Removing water blocks or emulsion blocks from around the well bore
- Preventing emulsions between crude oil and workover fluids or spent acid
- Intensifying acid reaction rate on carbonate scale and formations
- Cleaning floors, tools and equipment
- Surfactant flooding
- Improving performance of other products
Due to the wide variation of formation chemistries and production systems, most Sulfatron surfactant products are actually blends of two or more surfactants to provide a broad range of applicability and effectiveness.
Project-specific surfactants are often key to application success. With a diverse range of surfactant chemistry available, CTI experts can quickly apply their field experience to find the most effective, economic solution.