Deep Panuke Project Description - Encana

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Spent TEG has no measurable H 2 S and will be disposed of an approved facility.2.4.1.6 Hydrocarbon Dewpoint ControlFor the M&NP Option, the dehydrated gas from the TEG system is cooled via the Joule-Thompson (JT)effect by dropping the pressure of the gas. A portion of the gas stream condenses (condensate), which isthen separated. This step will be done offshore as it is necessary to satisfy pipeline gas specificationrequirements.For the SOEP Subsea Option, the export gas routed to the SOEP 660 mm [26 inch] pipeline need notmeet sales gas specification requirements. For these cases, hydrocarbon dewpoint control operationswill be done via the SOEP gas plant existing facilities.2.4.1.7 Condensate Treatment for FuelRecovered condensate will be treated via stabilization to remove light ends and H 2 S. The light ends andH 2 S thus released are recycled back to the raw gas stream for processing.For the M&NP Option, condensate is burned on the MOPU as the primary source of fuel. Operation ofthe condensate stabilizer will remove H 2 S in order to minimize air emissions and to produce a fuelmeeting the turbine driver requirements. Given that the amount of condensate is a function of raw gasrate thus declining over the life of the Project, it will be supplemented with natural gas as necessary tomaintain adequate fuel levels.The SOEP Subsea Option, all recovered condensate will be routed to the shore based SOEP facilities forseparation, processing, and sale.Condensate production is based on the production profile for the Project. The production profile hasbeen calculated for a range of reservoir gas compositions. The intent is that the MOPU will be designedfor the entire possible range. Over the range, the facility will produce less condensate than that requiredfor fuel thus no surplus condensate will exist for the M&NP Option.The MOPU will have some minimal storage for condensate. This storage is, approximately 55 m 3 andrepresents approximately five hours of consumption at full rate. The intention of this storage is to coverperiodic production upsets with enough time to allow for short term troubleshooting and/or swingingfuel from condensate to either fuel gas or diesel. The storage tank is a pressure vessel that is pressuredwith inert gas with excess pressure routed to the flare.Deep Panuke Volume 4 (Environmental Assessment Report)• November 2006 2-36
For the M&NP Option, it is estimated that there will be no surplus condensate produced beyond fuelusage; however, the ability to inject condensate down-hole with the acid gas stream provides operationalflexibility in times of maintenance and/or operational issues. The probability of the acid gas injectionwell malfunctioning and becoming inoperable is very low (
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 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 46 and 47: 2.7 Emissions and DischargesEnCana
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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