Deep Panuke Project Description - Encana

More documents

Recommendations

Info

will be designed considering emergency shutdowns, blocked discharges, fire exposure, tube rupture,control valve failure, thermal expansion and utility failures.Scheduled activation of the relief and blowdown system will occur for planned tests and inspection ormaintenance work. When the system is commissioned and activated, hydrocarbons will be safelydirected to the flare system. The flare will be designed to prevent any impact on the helideck and theliving quarters during worst-case weather scenarios.2.4.2.7 Inert Gas SystemThe Project will include an inert gas system. Inert gas is necessary for commissioning and start-upexercises as well as ongoing operations. The main use of the inert gas is in the gas compressor seals.The inert gas may also be used as a blanketing or purging gas to displace hydrocarbon vapours andreduce the risk of explosion and fire.2.4.2.8 Instrument AirInstrument air will be produced by electric driven air compressors and used in the instrumentation andcontrols system. The air will be dried.2.4.2.9 Breathing AirA breathing air system will be included in the design of the Project. Breathing air will be required foremergency purposes and for routine maintenance activities.2.4.3 Support and ServicingSupply vessels and helicopters will be used to supply personnel, fuel, food, well construction equipmentand other materials required to maintain production, construction, and well construction operations.Typically, helicopters will be used for regular crew changes, visits from regulatory agencies, servicepersonnel and other visitors that need to be transported to and from the offshore facilities.2.4.3.1 Support VesselsSupply vessels will be used to provide the platform operations with materials. Supply vessels will holdliquid drill mud, drill water, potable water, barite (weighting material), fuel, cement, bentonite (freshwater gel), drill pipe, casing and various equipment necessary for well construction operations,production operations and construction. It is anticipated that supply vessels will make periodic roundtrips from a dockside shorebase in Nova Scotia to the platform operation between two and four times aDeep Panuke Volume 4 (Environmental Assessment Report)• November 2006 2-42
week during normal operations. It is anticipated that there will be approximately six trips a week duringconstruction and heavy maintenance periods. In addition, a standby vessel is required near the platformat all times as per CNSOPB regulations.2.4.3.2 HelicoptersPersonnel will be transported to and from the offshore facilities via helicopters from the heliport locatedat the Halifax International Airport. During pipelay and heavy lift activities, the frequency of helicopteractivity is estimated to be two to three trips per week. During hook-up and commissioning, thefrequency is estimated to be seven to ten trips per week. The frequency will reduce to approximately sixto ten flights per month during operations. These helicopters are used primarily to transport crewmembers, company personnel and service personnel. In some cases, small equipment and parts aretransported via air transportation.2.4.4 Project Safety ZonesEnCana will consult with the appropriate regulatory authorities to develop a safety zone around theDeep Panuke facilities in accordance with the Nova Scotia Offshore Petroleum Drilling Regulations andthe Nova Scotia Offshore Area Petroleum Production and Conservation Regulations. This zone willinclude, as a minimum, an area extending 500 m around the MOPU and will likely also include theinterfield flowlines and wellheads. The exact configuration of the safety zone will be determined basedon safety risk assessment studies and consultations with the regulatory agencies. There will also be atemporary 500 m safety zone around the drilling rig when it is on location for development drilling. ANotice to Mariners will be issued and appropriate mariner charts will be updated for the installationsthrough the Canadian Hydrographic Service.Standard operating procedures will be developed to lessen the risk of collisions between ships andProject infrastructure. These would include, but are not limited to, the following:• presence of structures and safety zones would be indicated on nautical charts;• Coast Guard Notice to Mariners would apply during construction; and• radio operators would notify approaching vessels of the presence of the structures. The distanceat which mariners would be notified would be dependent on a number of factors, including thedirection and speed of the approaching vessel and weather conditions.Although there are no regulations under the CNSOPB that provide a similar safety zone around apipelaying vessel, EnCana will request the Coast Guard issue a Notice to Mariners with regard to thistemporary construction activity. Mariners will be informed as to the status of the pipelaying operationand the vessels taking part in the activity. The export pipeline’s design takes into consideration fishingactivity in the area so that once the pipeline is laid, there will be no restrictions with regard to safetyDeep Panuke Volume 4 (Environmental Assessment Report)• November 2006 2-43
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 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

Create successful ePaper yourself

Delete template?

Save as template?