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Water Management Techbook 2017

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Page 34 of 55 | May 2017 | 33 WATER MANAGEMENT: TECHNOLOGY SHOWCASE the mud blinded the filter plates and the solids com- ing off the press needed excessive amounts of fly ash to absorb the moisture. Mud samples were shipped for bench simulation testing to ALAR Engineering, which has released the Auto-Vac rotary vacuum drum dewatering filter. Satisfied with the results, the company shipped a tote of its wastewater to ALAR for a test bay demonstration. Grab samples of the dry solids and clear effluent were taken and sent out for laboratory analysis. The company rented a pilot test unit and later purchased a trailer-mounted Auto-Vac Model AV660. Once installed, the Auto- Vac produced water with less than 50 ppm total sus- pended solids (TSS) and solids that were many times drier than from the filter press. The need for fly ash was eliminated. The Auto-Vac solids were used to absorb the moisture from the centrifuge solids. On some occasions it would extract valuable condensate from the process, which was recovered in the clean water tanks. The low TSS enhanced post desaliniza- tion or other ultrafiltration methods. Mobile or semi-permanent onsite water treatment Proper water treatment is critical to oilfield opera- tions to ensure operators perform safely, efficiently and in compliance with governmental regulations. Baker Hughes H2prO HD water treatment services offer a cost-effective method to efficiently treat fresh, produced, flowback and brackish water for reuse, recycle or disposal. Based on chlorine diox- ide, the system offers a highly effective mobile or semi-permanent onsite treatment that kills bacte- ria and oxidizes hydrogen sulfide, iron sulfide and polymers in the water. Additionally, the Gen III sys- tem is the newest addition to the H2prO HD fleet. The next-generation systems are fully compatible with existing equipment to allow seamless inte- gration. This is specifically beneficial for on-the-fly treatments during hydraulic fracturing operations and surface water treatment in pits, tanks and ves- sels where system flexibility and mobility are key. Treatment reduces contaminants by up to 99% The rapid increase in hydraulic fracturing in uncon- ventional completions has put great stress on freshwater sources. As a result, many producers are tapping the deeper supplies of brackish (moderately saline) water. The problem that arises is that brack- ish water contains more than just salt. Depending on the location, it might host one or more of the follow- ing in levels high enough to reduce performance or damage wellbores: sulfates, manganese, iron, bicar- bonate, calcium and other dissolved solids. Bosque Systems' AnCat treatment reduces these and other contaminants by up to 99%. It accomplishes this using a specifically designed ion exchange resin. Installed onsite, the AnCat unit is scalable, can be remotely monitored and operates 24/7 as needed. One case study showed that AnCat reduced the sulfate content of brackish water from 400 ppm to 2 ppm to 6 ppm. New report on US class II subsurface injection wells The EnergyMakers Advisory Group is publishing a comprehensive 200-page meta-study. The report identifies and qualifies the complex risk factors and recent trends associated with the oil and gas industry's operational reliance on class II saltwater The Auto-Vac rotary vacuum drum dewatering filter is shown. (Photo courtesy of ALAR Engineering) Bosque Systems removes the sulfate during the treatment process with its safe AnCat technology. (Photo courtesy of Bosque Systems)

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