Notional Field Development Final Report - EBN

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EBN Notional Field Development Plan Figure 4-29. Treated waters can be re-used for agricultural irrigation 4.3.14 Disposal Options Through the implementation of the Water framework Directive (WFD), the Water Act (Waterwet) regulation has changed since 2009. In addition to materials and/or emissions, the permit must pay attention to other environmental impacts, including ecology. As elaborated in the water management plans, the criteria and principles of the WFD, should be used. An assessment framework has been developed to help the local Water BoardsThe effluent need to meet the requirements of very low concentrations regarding metals, biocides, and salt. The possibilities for disposal of produced waters from drilling operations are: • Waste water treatment plant (WWTP), transported directly or indirectly through a sewer pipe • Into surface waters • Injection into an aquifer • Injection into an depleted oil or gas well • Transport by truck to a dedicated treatment facility (Waste Terminal Moerduijk (ATM) or Waste Treatment Rijnmond (AVR)) © 2011 Halliburton All Rights Reserved 170
EBN Notional Field Development Plan Legislation in the Netherlands concerning the quality of discharge water is strict with the levels of chemicals, biocides, metals and salt being the primary areas of concern. Actual cubic meter prices depend on: · Capacity, · Quality, · Distance, · And the period of water discharge. 4.3.14.1 WWTP All production and waste water must be pre-treated to remove biocides and metals and reduce salt levels prior to entering the WWTP system to ensure these waters do not impact the treatment processes which are primarily biological. Produced and flowback water must be carried via a dedicated pipeline. Figure 4-30. WWTPs are limited in their ability to process frac waters While the WWTP process does not remove the salt, if the treated water still has a high salt concentration, additional treatment will be necessary. The maximum allowable concentration of salt is within a 150 to 500 mg/l range, and is dependent upon where the water will be discharged. 4.3.14.2 Surface water Discharge to surface water is only possible if the effluent meets the very tight maximum allowable concentrations for metals, P, N, COD, BOD etc. The same maximum allowable concentrations are © 2011 Halliburton All Rights Reserved 171
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