Deep Panuke Project Description - Encana

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2.7 Emissions and DischargesEnCana will adhere to the OWTG (NEB et al. 2002) and all applicable regulations for emissions andwaste management. Where no standards exist, best industry practice will guide EnCana. EnCana willminimize, to the extent practical, both the volumes of wastes being discharged and the concentration ofcontaminants entering the environment. A Waste Management Plan (WMP) (included in the EPP) willbe developed for the Project that will address all phases of the Project including construction,installation, operation, decommissioning, and abandonment. The goal of this plan is to minimizeoffshore wastes, discharges, and emissions and identify appropriate mitigative measures.Estimated quantities of wastes, discharges, and emissions that will be generated for both theconstruction/installation/drilling and production/operation phases of the Project are summarized in Table2.8. The table also includes summary descriptions of the characteristics of the waste discharges anddisposal procedures to meet regulatory compliance standards.2.7.1 Air EmissionsSources and types of air emissions during routine Project construction and operation will include:• exhaust from supply and stand-by vessels;• short-term flaring of the produced fluid from production wells during clean-up;• exhaust from machinery on the platform (e.g., gas turbines);• fugitive emissions (e.g., emission of volatile organic compounds from valves, filter changeouts,storage of hydrocarbons, etc.);• emissions associated with processing operations including continuous flaring for processing byproductsfrom TEG and produced water treatment systems; and• flaring of the full acid gas stream during routine maintenance of the acid gas management system(approximately 2% of operating time).The gas vented from the TEG regenerator must be continuously flared to prevent emissions of aromatichydrocarbons (BTEX) from the system. If the produced water stripping unit is required to remove residualH 2 S prior to disposal, the waste gas from this unit will be injected into the acid gas disposal well.Refer to Appendix F for details on the atmospheric modelling undertaken for their Project. Furtherinformation on routine air emissions, including generation rates, is presented in Table 2.8 and Section8.1. Information on air emissions during malfunctions and accidental events is provided in Section8.1.4.4.Deep Panuke Volume 4 (Environmental Assessment Report)• November 2006 2-46
Table 2.8 Routine Project Emissions/EffluentsType Emission/Effluent Estimated Quantity Characteristics Disposal StandardConstruction/Installation/DrillingAtmosphericEmissionsGenerator, engine andutilities exhaustsTemporary, minor CO 2 , SO 2 , NO x , TSP Atmospheric emissions will comply with the Air Quality Regulations(Nova Scotia Environment Act) and Ambient Air Quality ObjectivesDrill WasteDischargesLiquid Effluentfor OceanDischargeFlaring during wellclean-up and completionWBMWBM associatedcuttingsCompletion brineSanitary and food wasteExpected ~1/2 day perproduction (new and re-entry)well, unless otherwise requiredby operating requirements.Bulk surface release ofapproximately 700 m 3 of WBMfor production well; 600 m 3 forinjection well. WBM oncuttings is expected to be 244m 3 for each production welland 233 m 3 for injection well.Approximately 558 m 3 ofWBM associated cuttingsdischarged for each newproduction well to be drilled;487 m 3 for injection well.Approximately 1000 m 3 ofcompletion brine will bedischarged at the surface foreach new production well to bedrilled; 300 m 3 for each wellre-entry and the injection wellcompletion.Maximum capacity of thefacility during operation isapproximately 68 persons withan estimated volume of 20 Lper person per day; amountswill increase duringconstruction phase withincreased presence of vesselsand crews.Possible NOx, CH 4 , TSP,SO 2 , CO 2 , TPH, H 2 STypical constituentsinclude: barite, bentonite,KCl, polymers, NaHCO 3 ,lime, caustic soda, salt, andwaterRock cuttings coated withWBMWater-based brine, possiblyviscosifiersMacerated food, grey waterand sanitary waste(CEPA).Compliance with CNSOPB Production and Conservation Regulations(Section 32), Air Quality Regulations (Nova Scotia Environment Act)and Ambient Air Quality Objectives (CEPA).WBM will be disposed overboard. 1WBM associated cuttings will be disposed overboard. 1Completion fluid will be discharged overboard as permitted by theCNSOPB. 1Sanitary and food waste will be macerated to a particle size of 6 mm orless prior to ocean discharge. 1Deep Panuke Volume 4 (Environmental Assessment Report)• November 2006 2-47
Page 1 and 2: 2 PROJECT DESCRIPTIONThis section p
Page 3 and 4: Potential Radioactive Components: T
Page 5 and 6: 2.2.2 Subsea Wells and FlowlinesThe
Page 10 and 11: 2.2.3.1 M&NP OptionThe proposed pip
Page 12 and 13: The onshore portion of the pipeline
Page 14 and 15: 2.3 Construction and Installation2.
Page 16 and 17: 2.3.2 Export PipelineA proposed pip
Page 18 and 19: A dedicated subsea umbilical will b
Page 20 and 21: Table 2.2 Construction MethodsCateg
Page 22 and 23: These subsea structures may be fast
Page 24 and 25: For the new production and injectio
Page 26 and 27: Figure 2.8Typical Production Well S
Page 28 and 29: 2.3.8.1 Drilling Fluid ProgramWater
Page 30 and 31: Table 2.4 Hydrostatic Fluid Dischar
Page 32 and 33: Acid GasInjectionFeed GasCompressio
Page 34 and 35: Although the M&NP Option is the onl
Page 36 and 37: Spent TEG has no measurable H 2 S a
Page 38 and 39: Table 2.7 Water CompositionComponen
Page 40 and 41: 2.4.2 Utilities2.4.2.1 Electrical P
Page 42 and 43: will be designed considering emerge
Page 44 and 45: zones over the pipeline although th
Page 48 and 49: Table 2.8 Routine Project Emissions
Page 50 and 51: 2.7.1.1 Air PollutantsThe following
Page 52 and 53: esult in eye irritation, respirator
Page 54 and 55: Typically, a re-entry and completio
Page 56 and 57: 2.7.5.3 Deck DrainageDuring constru
Page 58 and 59: 2.9.2 Pipeline Leak PreventionThe p
Page 60 and 61: 2.9.5 Subsea Protection StructuresT
Page 62 and 63: • consider concept alternatives f
Page 64 and 65: Table 2.10Centre Substructure Type
Page 66 and 67: is much more weather-dependent than
Page 68 and 69: Table 2.11 Processing Location Alte
Page 70 and 71: After carefully considering the con
Page 72 and 73: Flaring acid gas consists of direct
Page 74 and 75: Table 2.13Produced Water Disposal A
Page 76 and 77: Therefore, injection into an annula
Page 78 and 79: Use of a dedicated condensate pipel
Page 80 and 81: is taken offshore on a special lay
Page 82: Table 2.15Acid Gas Injection Locati

Deep Panuke Project Description - Encana

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