Hydraulic Fracturing with Seawater
Solution: Oil & Gas Onshore
In the Middle East, fresh water for fracturing operations is associated with high capital and operation costs, due to the fresh water scarcely in the region. Seawater from the Arabian Gulf is highly saline and has high sulphate content, but can, if treated correctly, compensate for the lack of fresh water sources whilst reducing energy consumption. Our client needed a mobile solution to treat seawater for hydraulic fracturing.
Our mobile nanofiltration solution makes seawater available to unconventional basins through removing the sulphate and eliminating the water-scaling tendency and souring of the reservoir. The mobile, compact, fully automatic robust unit delivers 3,000 bbls/day of nanofiltered water under typical oilfield conditions.
Water analysis conducted on the nanofiltered seawater shows reduction of sulphate from 3400 ppm to 50-65 ppm operating at 38 °C fluid temperature in single pass configuration. Significant energy savings is achieved by specifically remove divalent ions and suspended solids, whilst leaving the monovalent ions (which do not impact operation). The life cycle cost for producing each barrel of filtered water is estimated to be less than $0.5. This makes this mobile filtration method one of the most economical for efficient fracturing operations for this fresh water scarce region. The built-in container units are mounted on trucks, and the provided cam lock interconnectors make the installation & dismantle very quick & easy.
Advanced Watertek Scope of Work
Ultrafiltration Pretreatment + 2 pass Nanofiltration system Installed in In 2 x 40 ft DNV containers
Achieved Product Water Quality after Pass 2 @ 38°C:
- SO4 < 2 ppm
- Ca < 240 ppm
- Mg < 175 ppm
UF Pretreatment + 2 pass Nano filtration system Installed in In 2 x 40 ft DNV containers
Fully automated system with minimum operator interventions
Advanced Watertek’s mobile sulphate removal system can be installed on trailers & can be stationed at remote fracking sites as & when required
Very low capacity diesel generator needed to operate
Very minimum chemical consumption
System supplied with operation & maintenance services
System is equipped with remote monitoring facility
System is equipped with lab kits to measure sulphate, calcium, magnesium, and chloride resulting in less turn around time, as key results are available instantly & product water can be used directly in the wells. (online measurement instruments option also available)
System design is scalable & can be increased/decreased based on requirement