Upstream Production Solutions Pty Ltd– ABN 26 166 665 952 Registered Office: 179 Great Eastern Highway Belmont, WA 6104 T: +61 3 8623 9800 This document is to be considered uncontrolled: ‐ When printed (unless formally issued as a ‘controlled copy’); and ‐ When saved electronically to an area outside of the IMS Waitsia Gas Project Commissioning and Operations Environment Plan Summary Upstream PS Controlled Document No. 21/HSEQ/ENV/PL06SUM Revision 2 Issue date: 11/07/2016 Waitsia Gas Project Commissioning and Operations Environment Plan Summary
Transcript
Upstream Production Solutions Pty Ltd– ABN 26 166 665 952 Registered Office: 179 Great Eastern Highway Belmont, WA 6104
T: +61 3 8623 9800
This document is to be considered uncontrolled: ‐ When printed (unless formally issued as a ‘controlled copy’); and ‐ When saved electronically to an area outside of the IMS
Waitsia Gas Project Commissioning and Operations
Environment Plan Summary
Upstream PS Controlled Document
No. 21/HSEQ/ENV/PL06SUM
Revision 2
Issue date: 11/07/2016
Waitsia Gas Project Commissioning and Operations Environment Plan Summary
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Operations Environment Plan Summary
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1 Abbreviations Abbreviation Definition
ALARP As Low As Reasonably Practicable
APA APA Group
CBTA Competency Based Training Assessment
CPI Corrugated Plate Interceptor
DG Dangerous Goods
DGF Dongara Gas Field
EMS Environmental Management Standard
EP Environment Plan
EPCM Engineering, Procurement and Construction Management
ESA Environmentally Sensitive Area
GDE Groundwater Dependent Ecosystem
HPF Hovea Production Facility
HSEQ Health, Safety, Environment and Quality
HWSB Hovea Water Supply Bore
IMS Integrated Management System
LTS Low Temperature Separator
MMP Mercury Management Plan
MSS Management System Standards
OSCP Perth Basin Operations Oil Spill Contingency Plan
PFW Produced Formation Water
PL111 Waitsia Pipeline
PL64 Xyris Pipeline
PLC Programmable Logic Controller
PPE Personal Protective Equipment
SDS Safety Data Sheet
SOP Standard Operating Procedure
Waitsia Gas Project XPF and associated infrastructure (wells, flowlines, pipelines PL111 and PL64)
WIA Well Intervention Activity
XPF Xyris Production Facility
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2 Contact Details Regulatory & Community Affairs Manager
AWE Limited
(08) 9480 1300
PO Box 574
WEST PERTH WA 6782
3 Location Waitsia Gas Project is within Production Licence L1, located in the northern Perth Basin on rural land located 340 km north of Perth and 16 km south east of Dongara (Figures 1 & 2). The key coordinates for the project are presented below.
Location Easting Northing
Xyris Production Facility (XPF) 314,715 mE 6,756,465 mN
Northern Hub 314,893 mE 6,762,386 mN
Senecio-03 Well 313,455 mE 6,762,447 mN
Waitsia-01 Well 316,398 mE 6,762,370 mN
4 Timeframe Waitsia Gas Project commissioning and operations activities are due to commence July 2016.
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Figure 1 Waitsia Gas Project Area
Source: Upstream Production Solutions 2016
Pye Road
XPF Access Track
Milo Road
Waitsia Gas Pipeline PL111
Waitsia-01 Flowline Senecio-03 Flowline
Xyris Pipeline PL64
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5 Description of the Existing Environment A description of the environment in the Waitsia Gas Project area is included in Table 1. Figure 2 indicates sensitive receptors with respect to the Waitsia Gas Project.
Table 1 Description of the Environment
Aspect Detail
Climate Mediterranean climate characterised by seasonal patterns of hot, dry summers and mild, wet winters
Soils Sandy, well drained soils consisting of calcareous and siliceous sand underlain by aeolianite, which is often exposed
Surface water Irwin River (4 km north)
Ejarno Spring (500 m south of XPF)
Groundwater
Groundwater level is near, or at surface in the swamps and low lying areas, following the surface topography, but with lower relief
The nearest GDE is located 500 m southeast of the XPF along the margins of the Ejarno Spring.
Conservation Areas
Nearest Red Book area >10 km west
Yardanogo Nature Reserve >4 km south of XPF.
Nearest identified ESA is >4 km north
Vegetation
Area historically cleared
No ecological communities of national or state significance are known to occur within the area
Weeds (WoNS and declared weeds) are known to occur in the area
Fauna
Introduced fauna including stock and feral animals
Vegetated areas could provide habitat to 28 species of conservation significance
Operations will not impact on significant fauna habitat
Aboriginal Heritage Inspections have found that operations will not impact areas of cultural heritage significance
European Heritage Yardarino School Ruins 4 km north
Socio-economic
Irwin townsite 4 km north and town of Dongara 15km west
Land use within the surrounding region is agricultural, consisting of cropping, sheep and cattle farming
Dongara is the centre for a long standing oil and gas industry
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Figure 2 Sensitive receptors
Source: Upstream Production Solutions 2016
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6 Description of the Activity The scope of this EP is for the Waitsia Gas Project and includes the commissioning and operation of the following infrastructure:
Senecio-03 and Waitsia-01 Wells Senecio-03 and Waitsia-01 Flowlines Pipelines (PL111 and PL64) Northern Hub XPF Hovea Production Facility (HPF)
The commissioning of the Waitsia Gas Project will be undertaken by AWE and their contract operator Upstream PS with support from Enscope Engineering, Procurement and Construction Management (EPCM). Enscope EPCM will hand over the Waitsia Gas Project after commissioning to Upstream PS to operate.
All Waitsia Gas Project activities are within existing disturbance areas. Access is via Pye Road or Milo Road and existing access tracks (Figure 1).
6.1 Infrastructure
6.1.1 Well Head Compounds
The Senecio-03 and Waitsia-01 wellhead compounds are existing areas previously graded and prepared for drilling activities (Figure 1). The wellheads and bunded chemical injection facilities are within a fenced area with locked vehicle and personnel access gates. Above ground pipework connects the wellheads to the buried gas flowlines. Solar/battery power is utilised for controls and communication system, corrosion protection and lighting. Impressed current cathodic protection (CP) is maintained for production casing, wellheads and buried pipework. Chemicals injected onsite from bunded containers (<1000 L) include methanol, corrosion inhibitor and hydrogen sulphide (H2S) scavenger.
6.1.2 Flowlines
Buried carbon steel flowlines and an instrument airline connect Senecio-03 and Waitsia-01 to the Northern Hub. The flowlines were constructed in 2016 in accordance with AS2885 with a design life of 25 years. The flowlines are operated in accordance with AS2885. Line of site markers are field set and in accordance with AS2885 requirements. Impressed current CP is maintained on the flowlines. There are no pigging facilities on the flowlines.
6.1.3 Northern Hub
The Northern Hub (including bunded chemical injection facilities) is within a fenced area with locked vehicle and personnel access gates. The incoming fluid from each wellhead is combined before being passed into the buried PL111. Solar/battery power is utilised for controls and communication system and lighting. Impressed current CP is maintained for buried pipework. Chemicals injected onsite from bunded containers (<1000 L) include methanol, corrosion inhibitor and hydrogen sulphide (H2S) scavenger.
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6.1.4 Waitsia Gas Pipeline
The Northern Hub is connected to the XPF via the buried carbon steel Waitsia Pipeline (PL111). The 6364 m pipeline was constructed in 2016 in accordance with AS2885 with a design life of 25 years. The pipeline is operated in accordance with AS2885. An instrument airline is installed to provide instrument air to the Northern Hub and Senecio-03 and Waitsia-01 well compounds. A pig launcher on a concrete bunded area is located at the Northern Hub and a pig receiver is provided upstream of the connection point to the XPF. Impressed current CP is maintained on the PL111.
6.1.5 XPF
The XPF is within a fenced area with locked vehicle and personnel access gates.
The facility is designed to produce up to 10mmscfd. The following equipment is operated at the XPF:
Slugcatcher - captures received liquids and controls slugs Closed unit absorbent bed (bunded) comprising:
Inlet filter coalesce / separator - removes liquid droplets Mercury guard bed - removes mercury Outlet particulate filter - removes any dust / particulates from gas stream
Liquid collection boot - removes bulk liquids from the well stream fluid (bunded) Gas/gas exchanger - pre-cools methanol treated gas prior to feed into the low
temperature separator (LTS) (bunded) LTS - conditions the methanol treated gas to export sales specifications by separating the
gas and liquid phases (bunded) Export coalescer and filter - removes liquid and dust from the export gas (bunded) Metering skid - provides metering, custody transfer and outlet flow control of ‘sales gas’
(bunded) Gas break out tank - receives site liquids under pressure from vessels on site and allows
evolved gas to vent (bunded) Liquid stock tank - receives liquids gravity fed from the gas break out tank with residence
time in tank allowing separation of water and condensate (bunded) Loading facility (bunded) comprising:
Gas engine alternator (GEA) - uses ‘sales gas’ for power generation at XPF including load-out pump, metering skid, air conditioning, site lighting and power for site buildings (bunded)
Diesel engine alternator (DEA) - provides back-up power generation (bunded) Instrument air system - consists of an electricity driven air compressor (bunded)
delivering compressed air to instruments at XPF, Northern Hub and Senecio-03 and Waitsia-01
Chemical management
Methanol injection - tank (bunded), pipework and pneumatic injection pumps (bunded) to deliver methanol into the gas stream to prevent hydrate formation
Biocide - container (bunded), pipework and pneumatic injection pumps (bunded) Engine oil and coolant in GEA reservoirs Diesel, engine oil and coolant in DEA reservoirs
Shut down system - pneumatic loop system activated by:
Fusible loop ESD push-buttons Loss of instrument air Loss of power Remote initiated by APA or Control Panel Operator
Site drainage:
Process bunds drain to a low point with locked valve and connection for collection of contaminated liquids by vacuum trailer for transfer to the DPF Corrugated Plate Interceptor (CPI)
Loading bay drains to low point where a locked valve marked “Bund Drain Valve – To Be Kept Closed and Locked” allows contaminated liquids to drain into a holding tank for transfer to the DPF CPI
Tank bund designed to the requirement of AS1940 including capacity
Fire management equipment:
Fire extinguishers Fire hose reel for use during a tank / tank bund incident only by trained
professionals (DFES)
Laydown area comprising
Storage for unused or spare equipment Waste (with appropriate bunding)
Site office and associated amenities (eg, water tank supplied with town water, bottled drinking water, sewage)
6.1.6 Xyris Pipeline
The XPF is connected to the Parmelia Pipeline via the buried carbon steel Xyris Pipeline (PL64). The 400 m pipeline was constructed in 2004 in accordance with AS2885 with a design life of ~25 years. There are no pigging facilities on the pipeline.
A fenced compound at the connection to the Parmelia Pipeline contains an inlet tee, isolation valve, insulating gasket, vent valve, temperature transmitter and check valve. These facilities are managed by APA.
The pipeline was operated from 2004 to 2012 when it was placed into care and maintenance. Surveys undertaken in 2015 on the pipeline in preparation for recommissioning include:
ILI inspection - no significant issues
Pipeline hydro test - successful
Depth of cover survey - exceeds minimum requirements
Pipeline marker line of site survey (in accordance with AS2885)
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Reintroduction of hydrocarbons is scheduled for during commissioning (Section 4.6). The pipeline is operated in accordance with AS2885.
6.1.7 HPF and DPF
The DPF is operated in accordance with the Dongara Gas Field Environment Plan [21/HSEQ/ENV/PL03] (DGF EP). The condensate from the XPF is taken to the DPF condensate loading bay and transferred into the DPF condensate storage tanks. This activity is managed under the DGF EP.
The HPF is under Care and Maintenance. Waitsia Gas Project operations will be conducted at the HPF in accordance with this EP.
Approximately 15 kL/week Produced Formation Water (PFW) from the XPF will be transferred to the existing lined HPF Evaporation Pond or the refurbished lined HPF ‘Turkey’s Nest’. The loading bay at both locations are bunded.
Chemicals for the Waitsia Gas Project are stored in the HPF Chemical Storage Shed.
Waste not stored at the XPF will be taken to the HPF or the DPF and stored on a hardstand area.
Where water is required for process or maintenance purposes (not usually required), water will be supplied from the licenced DPF Abstraction Bores or the licenced Hovea Water Supply Bore (HWSB) or town water supply.
6.2 Commissioning Details Commissioning of the Waitsia Gas Project includes the introduction of natural gas into the system (remote wells, flowlines, Northern Hub, PL111, XPF and PL64 into the Parmelia Pipeline).
Commissioning is estimated to take up to ten days and the activities include:
Venting ~700 m3 nitrogen gas (to zero pressure) into atmosphere before closing system (no hydrocarbon emissions, small slug of nitrogen will be exported with sales gas)
Wellhead control of the choke valve Methanol injection to control hydrates at the wellhead chokes Managing wellhead temperatures Managing flowline and pipeline temperatures and pressures Managing well flow rates Testing and confirming the correct operation and functioning of safety shutdown systems
under operational conditions Monitoring liquid levels at the slug catcher and liquids handling facility estimated Monitoring and controlling pressure and temperature at the LTS to achieve export quality
natural gas Methanol injection to control hydrates at the LTS Manning and monitoring the Programmable Logic Controller (PLC) at the DPF Control
Room with field operational support confirming correct field and PLC control responses Monitoring local control at the XPF Metering Facility Controlling flowrates at the XPF Metering Facility to achieve nominated delivery rates and
export quality natural gas
The DEA will be utilised during commissioning before switching to the GEA when stable process conditions have been achieved.
As gas is being introduced to the system during commissioning there will be some venting of gas (eg. breakout tank vent which vents under normal conditions and any process upsets).
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Other activities that will be conducted for the first time at a time later than the commissioning period include:
Daily checks / field readings / work orders House keeping Maintenance (preservation of equipment) Repair activities under Engineering Management of Change (MOC) (restoration /(like-for-
like) replacement of above ground equipment) Chemical top-ups Chemical pump operation and maintenance Regular pigging Operation of drain points Bund management Venting (wellheads and plants) Load-in methanol Load-out and transport condensate / PFW Load-in PFW at HPF Monthly workplace inspections Monthly HSE meetings Closed unit absorbent bed loading and unloading (every three years) in accordance with
the Mercury Management Plan (MMP) [21/HSEQ/GEN/PL18] Waste management Weed management Maintenance of cleared areas (fire breaks, compounds, pipeline easements, access
tracks and laydown areas) Well tests Monitor evaporation pond level Inspection and reporting Groundwater monitoring at Senecio-03 and Waitsia-01 (annually) Auditing Reporting
6.4 Oil Spill Contingency Plan The preparedness planning and management of a spill associated with Waitsia Gas Project Commissioning and Operations is in accordance with the OSCP [21/HSEQ/GEN/PL02]. The OSCP defines how field and Perth office teams would respond to a hydrocarbon/chemical spill incident in a manner which minimises the impact on the environment. Spill sources applicable to Waitsia Gas Project commissioning and operations include:
Transfer operations Chemicals in process or storage
One drill managed under the OSCP will be conducted annually.
6.5 Details of Chemicals and Other Substances No chemicals or other substances will be introduced into the Senecio-03 or Waitsia-01 well, reservoir or subsurface formation as part of Waitsia Gas Project Commissioning and Operations.
7 Environmental Impacts and Risks The environmental risks and management identified for the commissioning and operations activities ranked medium or above are presented in Table 2.
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Table 2 Risk Assessment Table
Risk identification Risk treatment
(Existing Safeguards / Management Methods)
Post treatment risk assessment
Aspect Source of Risk
Potential Environmental Impact
Consequence Likelihood Risk
Ranking
Fire Plant incident
Bush fire Loss of fauna,
habitat or personnel
Public third party damage
Loss of containment
Fire break maintained around facility
Weed management systems implemented
Designated smoking area
Upstream PS PTW in place for hot work activities
Perth Basin Operations Emergency Response Plan (ERP) includes evacuation, bushfire and process plant fire
Total Fire Bans
Operations comply with Harvest and Vehicle movement bans as implemented by Shire of Irwin
Fire extinguishers comply with relevant fire safety standards/hot work permit requirements
Vehicles and machinery parked in designated areas
Portable fire extinguishers as per ERP
Fire hose reel for tank / tank bund incident to be used by Fire Service personnel
Personnel training / induction / Emergency Response Competency Based Training Assessment (CBTA)
Monthly workplace inspections include checking fire breaks
Emergency Shutdown System
Emergency Drills conducted in accordance with ERP requirements (includes one fire drill per annum)
Impacted soil from foamed fire water will be removed immediately after a fire hazard has been controlled
Landowner liaison communicates with landowners during a fire event initiating on site or off site
MAJOR
(4)
VERY UNLIKELY
(B)
MEDIUM
(8)*
Direct impact from operations
Security Sabotage See loss of containment
Daily operational checks
Fenced compounds to deter access
SCADA (Supervisory Control And Data Acquisition) which allows personnel to view live process data would indicate any interference with process equipment
Signage where appropriate (eg. pipeline markers, authorised entry
SERIOUS
(3)
VERY UNLIKELY
(B)
MEDIUM
(6)
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Risk identification Risk treatment
(Existing Safeguards / Management Methods)
Post treatment risk assessment
Aspect Source of Risk
Potential Environmental Impact
Consequence Likelihood Risk
Ranking
only)Lighting around facility at night-time
Sensor cameras strategically placed at XPF; data downloaded by operations as per Preventative Maintenance Management Program Policy
Monthly Workplace inspections include security checks
Personnel present to supervise commissioning activities
Evaporation Pond / Turkey’s Nest load-in (HPF)
Condensate /
contaminant
carry-over
Incompatible
products in
pond (multiple
uses, e.g.
WIAs, existing
contaminants)
Extreme
weather event
Loss of
containment
and soil
contamination
Fauna
Human
exposure
Failure of
evaporation
pond wall
Single liner 2mm HDPE (Evaporation Pond) and 0.75mm Enviroliner (Turkey’s Nest) chemically resistant and suited to PFW containment.
Standard Operating Procedure(s) (SOP) for PFW load out management
Personnel training / induction / CBTA
Supervision of loading activities
PPE
Spill kits located in / adjacent to potential spill risk areas (kits fitted with tamper tags)
Sampling is conducted upstream (identifies level of contaminants)
Baseline soil samples were obtained prior to pond installation
Monthly workplace inspections to include checks on liner, water level, visual checks on condition of pond contents, checks for erosion and condition of pond wall
Pond maintained at or below 0.5 m allowing for a minimum 200% free board above this level
Visual level gauge for pond
Relined HPF Turkey’s Nest available as contingency pond
Fauna egress matting provided installed and its effectiveness maintained
Fencing of HPF to exclude large fauna
Fencing around HPF
ERP
Emergency drills conducted in accordance with ERP requirements (includes at least one spill drill per annum)
SERIOUS
(3)
UNLIKELY
(C)
MEDIUM
(9)
Unplanned event
Major loss of
containment
(eg. well
Fire Hazard
Greenhouse
gas emissions
Fusible loops
Emergency Shutdown (ESD)
Remote monitoring capability
SEVERE
(5)
EXTREMELY UNLIKELY
(A)
MEDIUM
(5)
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Risk identification Risk treatment
(Existing Safeguards / Management Methods)
Post treatment risk assessment
Aspect Source of Risk
Potential Environmental Impact
Consequence Likelihood Risk
Ranking
integrity
failure,
pipeline /
flowline
rupture,
process
failure)
Spills and soil
contamination
Well casing designed to maintain well integrity
ERP includes unplanned gas release and process plant fire / explosion
OSCP and spill response equipment available on site
Pipe and vessel design
Bunded vessels/tanks to provide secondary containment
Cathodic protection system: wells, flowlines and pipelines (underground)
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8 Implementation Strategy The objective of the implementation strategy below is to describe how all aspects of the activity will be directed, reviewed and managed to ensure that all potential impacts and risks are continuously reduced to as low as reasonably practicable (ALARP):
(1) Ensure that the agreed environmental performance objectives and standards are met (2) Identify specific systems, practices and procedures to be used to ensure that
environmental risks and effects are reduced to ALARP (3) Establish a commitment to the protection of the environment (4) Establish a clear chain of command that sets out the roles and responsibilities of
Personnel in relation to the implementation, management and review of the EP (5) Ensure that each Employee or Contractor working on, or in connection with Waitsia Gas
Project Commissioning and Operations has the appropriate skills and training (6) Monitor, audit and review environmental performance and the Implementation Strategy (7) Maintain quantitative records (8) Develop and implement emergency and spill preparedness planning and response
capability (9) Report on environmental performance (10) Provide for appropriate consultation with relevant government authorities and other
interested persons or organisations
Details of AWE and Upstream PS’s systems, practices and procedures relating to the management of all potential impacts and risks of the activity are included in Table 3. The objective of these systems, practices and procedures is to continuously reduce the potential impacts and risks of the activity to ALARP.
Table 3 AWE and Upstream PS Systems, Practices and Procedures
Item Objective to achieve ALARP Location
Code of Practice for AWE & Upstream PS sites
To outline the main HSE criteria to be observed by AWE & Upstream PS
AWE Limited Health Safety & Environment Policy [AWE-HSE-POL-001]
To provide a framework comprising a set of performance standards, expectations and guidelines for effective management of aspects and impacts of operations
MSS [00/SP/CPL/PO03]
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Item Objective to achieve ALARP Location
Environmental Management Standard
To outline the organisational structure, planning activities, responsibilities, practices, procedures, processes and resources for developing, implementing, achieving, reviewing, and maintaining the environmental policy
Corporate EMS [00/HSEQ/ENV/PL01]
Preventative Maintenance Management
To provide a preventative maintenance management tool that stores records, schedules maintenance and documents activities undertaken
Preventative Maintenance Management Program
Standard Operating Procedures
To guide personnel on how to conduct tasks to meet environmental performance throughout operations
Upstream PS IMS
Permit to Work System
To ensure facilities are in a safe and environmentally acceptable condition before works starts and is kept in this condition until all personnel involved in the work have signed off completion
Upstream PS IMS
DPF Control Room
Training Management
To provide the framework for all personnel to have the competency for their respective roles for the management of safety and environmentally critical risks and daily work activities
Training Management Plan [00/BA/HR/PC54]
Audit Management
To plan and document the independent examination and verification of activities, records, processes, and other elements to determine conformity to documented requirements and standards
To provide guidance on the management of activities to be undertaken in a safe and environmentally responsible manner
Mercury Management Plan [21/HSEQ/GEN/PL18]
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Item Objective to achieve ALARP Location
Sampling Surveillance Program
Outline groundwater and surface water monitoring program with guidance for compliance with WGP EP commitments
Waitsia Gas Project Surveillance Sampling Program [HSE-E-105]
Hazard and Incident Reporting
To outline the processes and requirements for hazard and incident reporting at Upstream PS sites
Hazard and Incident Reporting Procedure [00/HSEQ/GEN/PC23]
9 Consultation AWE has engaged with stakeholders since the planning phase for the drilling of the Senecio-03 and Waitsia-01 wells through to pipeline construction and XPF refurbishment planning. During this time stakeholders AWE has consulted with include:
Local Traditional Owner representatives Adjacent landowners and tenants APA Group – Parmelia Pipeline and Mondarra Gas Storage Facility Department of Environment Regulation Department of Fire and Emergency Services Department of Mines and Petroleum Department of Water Department of Health Local business owners and service providers Shire of Irwin Mid West Development Commission Mid West Chamber of Commerce Joint Venture Partner
AWE will continue to engage the above and additional stakeholders during the commissioning and operations phase of the project.
AWE also has a website specifically covering its Perth Basin activities (www.awemidwest.com.au). The website includes project specific pages as well as blogs highlighting updates and responding to particular topics of interest to our stakeholders. It also includes an option to subscribe to news feeds.
