TL;DR
Oil & gas surveying underpins every stage of Australia's $65 billion LNG export industry — from wellpad setout in the Cooper and Surat basins to dimensional control on Curtis Island LNG trains and settlement monitoring on Pilbara onshore receiving facilities. Industrial Spatial Solutions provides 3D laser scanning, mechanical and dimensional control surveys, civil and engineering surveys, and UAV/drone surveys to LNG operators, gas field developers, pipeline contractors, and refineries nationwide — delivered to hazardous-area, permit-to-work standards.
Key takeaways
- Australia exported around 80 million tonnes of LNG in FY2024-25, worth approximately $65 billion, making it the world's largest LNG exporter alongside Qatar and the USA; precision surveying supports the wells, pipelines, and trains that move it (Resources and Energy Quarterly).
- Oil & gas surveying spans wellpad and gathering-line setout, pipeline as-built survey, brownfield laser scanning of process modules, dimensional control of skids and spools, tank calibration, and long-term settlement and deformation monitoring of plant on soft or reactive ground.
- LNG and refinery scanning routinely captures dense pipe racks to ±2-5 mm at 10 m, while dimensional control on critical tie-ins and pipe spools is held to ±1-2 mm using total station and laser tracker methods — the difference between a spool that bolts up and one that returns to the workshop.
- Australian work is governed by AS 2885 (gas and liquid petroleum pipelines), AS 3846 / API 650 / API 653 for storage tanks, AS/NZS 60079 hazardous-area requirements, and CASA Part 101 for RPAS operations over live plant.
- Brownfield tie-ins and shutdown scopes fail most often on stale as-builts; a laser scan of the tie-in zone before the turnaround removes the single biggest cause of fit-up rework during a multi-million-dollar shutdown window.
Table of contents
- Oil and gas in Australia: sector overview
- Why oil and gas operations need precision surveying
- Surveying applications across the oil and gas value chain
- Relevant ISS services for oil and gas
- Methods, equipment and tolerances
- Standards and compliance
- Why choose ISS for oil and gas surveying
- Frequently asked questions
- What to do next
Oil and gas in Australia: sector overview
Australia's oil and gas industry is, in practice, an LNG industry. The country exported roughly 80 million tonnes of LNG in FY2024-25 for around $65 billion in export earnings, drawn from a concentrated set of world-scale projects: the North West Shelf, Pluto, Gorgon, Wheatstone, and Prelude FLNG off Western Australia; Ichthys and Darwin LNG in the Northern Territory; and the three Curtis Island trains at Gladstone — Queensland Curtis LNG, Gladstone LNG, and Australia Pacific LNG — fed by coal seam gas from the Surat and Bowen basins.
Upstream, the picture is spread across the continent. Santos and Beach Energy operate the mature Cooper Basin around Moomba in South Australia. Coal seam gas wells number in the thousands across the Surat Basin near Roma, Chinchilla, and Wandoan. Conventional offshore production continues in Bass Strait off Gippsland, and the Beetaloo and Barossa developments are opening new frontiers in the Northern Territory. Downstream, Australia's remaining refineries — Ampol Lytton in Brisbane and Viva Energy Geelong in Victoria — anchor a network of import terminals, tank farms, and fuel distribution depots.
This is a sector defined by extremes: high-pressure gas, cryogenic processing at minus 162 degrees Celsius, hazardous-area classification across most of the plant footprint, cyclone exposure on the north-west coast, and capital projects measured in tens of billions. Every one of those conditions raises the bar for survey accuracy and the discipline with which it is delivered.
Why oil and gas operations need precision surveying
Oil & gas surveying differs from civil or even general mining surveying in three ways. First, the consequence of error is concentrated and expensive. A pipe spool fabricated to a stale as-built that does not bolt up at a tie-in flange can cost a shutdown crew days of standby on a turnaround burning hundreds of thousands of dollars a day. Second, the environment is hostile and regulated — most of the plant is a hazardous area under AS/NZS 60079, work proceeds only under permit, and intrinsically safe or hot-work-permitted equipment and procedures are mandatory. Third, the data has to be right the first time, because re-access to a live process area is slow, costly, and sometimes simply not granted within the window.
The financial case is straightforward. Brownfield tie-ins are where surveying earns its keep. When designers model a new module against decades-old drawings rather than a current point cloud, clashes surface during installation rather than in the office — and a clash discovered on the deck during a shutdown is the most expensive clash there is. A single laser scan of the tie-in zone, processed into the design model, removes that risk for a fraction of one day's shutdown cost.
| Do | Don't |
|---|---|
| Laser scan the tie-in zone before the turnaround and design against the point cloud | Trust 1990s P&IDs and isometrics as the basis for new spool fabrication |
| Hold critical tie-in dimensional control to ±1-2 mm with total station or laser tracker | Accept tape-and-eye field measurements for flange-to-flange spool fabrication |
| Calibrate storage tanks to API 2550 / API 7 before custody-transfer disputes arise | Rely on nameplate capacity for fiscal volume reconciliation |
| Establish settlement monitoring on tanks and modules from commissioning | Wait for visible distortion or a flange leak before measuring foundation movement |
Surveying applications across the oil and gas value chain
Oil & gas surveying touches every phase of an asset's life, from the first wellpad peg to the final tank inspection. Each phase has its own accuracy class, equipment, and deliverable.
Wellpad and gathering-line setout
Upstream development begins with surveying. ISS sets out wellpad corners, lease boundaries, access tracks, and the gathering-line corridors that connect wells to compression and processing — work that is heavy across the Surat Basin's coal seam gas fields and the Cooper Basin. GNSS control and RTK setout to ±20-30 mm establish the geometry; as-construction surveys then confirm the built positions for the asset register and AS 2885 pipeline records.
Pipeline route and as-built survey
Gas and liquid pipelines are governed by AS 2885, which requires accurate route survey, depth-of-cover confirmation, and as-built records tied to the national datum. ISS provides centreline pickup, depth-of-cover survey, and as-laid documentation in MGA2020, with UAV corridor mapping used to capture long, remote runs efficiently before and after construction.
Brownfield laser scanning of process plant
The single highest-value application in operating oil and gas plant is brownfield laser scanning. A scan of a process module, pipe rack, or compressor station captures millions of points — every pipe, valve, support, and clearance — in hours rather than the weeks a manual walk-down would take. The point cloud becomes the trustworthy basis for revamp design, clash detection, and spool fabrication. This is where stale as-builts are replaced with reality.
Dimensional control of skids, spools and modules
For modular construction, skid fabrication, and major spools, ISS provides dimensional control: measuring the as-built fabrication against the design model so that a module fabricated in one yard mates with steelwork and tie-ins on site. Critical flange-to-flange and bolt-pattern checks are held to ±1-2 mm — the tolerance band where a spool either bolts up or comes back.
Tank calibration, settlement and deformation monitoring
Storage tanks require strapping and calibration for custody transfer and fiscal accounting under API 2550 and the API 7 series, and external roundness, verticality, and shell surveys to support API 653 in-service inspection. On the soft and reactive ground common to coastal LNG sites and tank farms, ISS establishes precise level networks and prism arrays to monitor differential settlement of tanks, modules, and foundations — sub-millimetre repeatable, trended over years.
Key point: Operators who treat scanning, dimensional control, and monitoring as separate one-off jobs pay for the same control network three times. The plants that get the best value tie all spatial work to a single survey control network and datum from commissioning, so the scan that informs a revamp, the dimensional control on a new spool, and the settlement monitoring on the tank next door all share one coordinate system.
Relevant ISS services for oil and gas
ISS delivers a complete survey portfolio to oil and gas operators, EPC contractors, and fabricators, all under hazardous-area, permit-to-work discipline.
3D laser scanning
Brownfield capture of process modules, pipe racks, compressor stations, LNG trains, refinery units, and tank farms. Point clouds are registered to plant control and delivered in E57, LAS/LAZ, RCP/RCS, and TruView formats that import directly into AVEVA E3D, Navisworks, SmartPlant, and Revit for revamp design and clash detection. Learn about 3D laser scanning →
Mechanical and dimensional control surveys
Dimensional control for skid and module fabrication, spool fit-up, compressor and pump train alignment, flange and bolt-pattern verification, and pipe rack as-built checks. Held to ±1-2 mm on critical interfaces using total station and laser tracker methods. Learn about mechanical surveys →
Civil and engineering surveys
Wellpad and lease setout, gathering-line and pipeline corridor survey, plant earthworks and foundation setout, depth-of-cover confirmation, and as-construction documentation in MGA2020 to AS 2885 and project standards. Learn about civil and engineering surveys →
UAV / drone surveys
CASA Part 101-compliant RPAS survey for pipeline corridor mapping, construction progress, stockpile and bund volumetrics, flare-stack and elevated structure inspection, and topographic capture across large, remote gas-field footprints — flown under operator approvals over live plant. Learn about UAV/drone surveys →
Settlement and deformation monitoring
Precise level networks, prism arrays, and repeat surveys to monitor differential settlement and structural movement of tanks, modules, jetties, and foundations on soft or reactive ground — with trend reporting and configurable trigger alerts. Learn about mechanical and monitoring surveys →
Methods, equipment and tolerances
ISS matches the method to the accuracy class the job demands, and selects equipment rated for the conditions found on Australian oil and gas sites.
- Leica RTC360 3D laser scanner — up to 2 million points per second, used for pipe-rack, process-module, and LNG-train capture. Typical registered accuracy of ±2-5 mm at 10 m, sufficient for revamp design and clash detection.
- Leica TS16 / total station — 1-second angular accuracy with automatic target recognition, used for dimensional control, spool fit-up, and tank shell surveys where ±1-2 mm is required on critical interfaces.
- Laser tracker — for the tightest dimensional control on modules, skids, and machinery, delivering accuracy in the tens of microns over short ranges where a bolt-up either works or it doesn't.
- GNSS RTK rovers — wellpad, lease, and pipeline corridor setout to ±20-30 mm, tied to MGA2020 and the project control network.
- CASA-certified RPAS (e.g. DJI Matrice with photogrammetry / LiDAR payload) — corridor mapping, volumetrics, and elevated-structure inspection across large gas-field footprints.
- Precise level networks and prism arrays — sub-millimetre repeatable monitoring of tank and module settlement, trended over commissioning and operating life.
All instruments are calibrated to traceable standards with current certificates, and ISS holds backup equipment to ensure a turnaround scope is never delayed by an instrument fault. AUD cost ranges vary with scope and access — a single-day brownfield scan of a process area typically runs from a few thousand dollars, while a full plant scanning and registration program for a revamp is scoped and priced per project. ISS provides fixed-price quotes once the scope and site access are confirmed.
Standards and compliance
Oil and gas surveying in Australia sits inside a dense standards framework spanning pipelines, pressure equipment, tanks, hazardous areas, and aviation. ISS delivers survey data formatted and documented for these requirements.
| Standard | Scope | Survey relevance |
|---|---|---|
| AS 2885 | Pipelines — gas and liquid petroleum | Route survey, depth of cover, as-laid records, datum control |
| API 650 / API 653 | Welded storage tanks — construction and in-service inspection | Shell roundness, verticality, plumb, settlement surveys |
| API 2550 / API 7 series | Tank capacity strapping and calibration | Fiscal and custody-transfer volume calibration |
| AS/NZS 60079 series | Explosive atmospheres — hazardous-area classification | Intrinsically safe / permitted equipment and procedures in classified zones |
| CASA Part 101 | Remotely piloted aircraft operations | RPAS approvals for survey and inspection over live plant |
| ISO 17025 | Calibration and testing competence | Traceable instrument calibration for survey deliverables |
Compliance is delivered through people and process as much as paperwork. ISS field staff hold current hazardous-area awareness and site-specific inductions for major LNG, gas-field, and refinery operators; survey records are managed under a quality system with full traceability from field observation to issued deliverable; and RPAS work is flown by CASA-certified remote pilots under the relevant operator approvals.
Key point: The most common compliance gap on brownfield oil and gas work is not the standard itself — it is the datum. Process plant modified over thirty years often carries multiple local grids and inconsistent benchmarks. Before any scanning or dimensional control begins, ISS re-establishes and verifies the plant control network, so that every later deliverable shares one defensible coordinate system.
Why choose ISS for oil and gas surveying
ISS is an Australian precision-surveying specialist built for industrial environments, not adapted to them. Our crews understand permit-to-work, hazardous-area classification, and the operational reality that a live LNG train or refinery does not stop for a survey. We plan scanning and dimensional control programs around shutdown windows and isolation periods, mobilise quickly to remote gas-field and coastal LNG sites, and deliver point clouds and reports in the formats your engineering and integrity teams already use.
We work nationwide — from the Pilbara LNG coast and the Surat and Cooper basins to Curtis Island, Darwin, Gippsland, and the Brisbane and Geelong refineries. The same teams that survey mining and heavy-process plant bring that discipline to oil and gas: tight tolerances, defensible control, and data that bolts up the first time.
Frequently asked questions
What oil & gas surveying services does ISS provide?
ISS provides 3D laser scanning of process plant and pipe racks, dimensional control of skids, modules and spools, wellpad and pipeline corridor setout, pipeline as-laid survey to AS 2885, tank calibration and shell surveys, UAV corridor mapping and volumetrics, and long-term settlement and deformation monitoring. All work is delivered to hazardous-area, permit-to-work standards by inducted crews.
Can you survey while the plant is live, or only during shutdowns?
Both. Laser scanning is non-contact and much brownfield capture is done with the plant running, subject to access and hazardous-area permits. For tie-ins and work inside restricted process areas, ISS plans scanning and dimensional control around shutdown windows and isolation periods, and our crews can work around the clock during a turnaround to fit the available window.
What accuracy do you achieve for LNG and refinery work?
Brownfield laser scanning is typically ±2-5 mm at 10 m, which suits revamp design and clash detection. Critical dimensional control — spool fit-up, flange and bolt patterns, module mating — is held to ±1-2 mm using total station and laser tracker methods, and tighter again with a laser tracker over short ranges. Settlement monitoring achieves sub-millimetre repeatability.
Are you compliant for hazardous areas and drone work over live plant?
Yes. ISS field staff hold current hazardous-area awareness and site-specific inductions, work under your permit-to-work system, and use procedures suited to classified zones under AS/NZS 60079. UAV operations are flown by CASA Part 101-certified remote pilots under the relevant operator approvals.
Will the point cloud import into our engineering software?
Yes. ISS delivers point clouds in E57, LAS/LAZ, RCP/RCS, and web-viewable TruView, plus extracted 2D drawings (DWG/DGN) where needed. These formats import directly into AVEVA E3D, Navisworks, SmartPlant, and Revit, and all data is supplied in MGA2020 with full datum documentation.
What to do next
Surveying is not a commodity in oil and gas — the right crew, with the right instruments, the right certifications, and a verified datum, is the difference between a spool that bolts up and a shutdown that overruns.
- Call 0407 057 015 to discuss your LNG plant, gas field, pipeline, or refinery survey requirements
- Send us your scope and any existing drawings — we'll review and recommend the most efficient and lowest-risk survey approach
- Book a site assessment — we'll attend, complete inductions, confirm hazardous-area and access requirements, and provide a fixed-price proposal
ISS works across every Australian oil and gas region, from the Pilbara LNG coast and the Surat and Cooper basins to Curtis Island, Darwin, and the Geelong and Brisbane refineries. We understand permit-to-work, hold the necessary certifications, and deliver survey data that integrates directly into your engineering and integrity workflows.
Industrial Spatial Solutions — Precision oil & gas surveying for Australian industry. Call 0407 057 015 or request a quote.
Related: 3D laser scanning | Mechanical and dimensional control surveys | Civil and engineering surveys | Manufacturing and processing surveys