End-to-End Metering Solutions for Oil & Gas
From FEED to operations support — OGS delivers turnkey metering systems, custody transfer assurance, calibration management, and smart digital infrastructure across the full hydrocarbon value chain.
End-to-End Metering Services
Eight integrated service lines covering the full metering lifecycle — from design and engineering to operations and audit.
Metering System Health Check
Comprehensive on-site assessment of your metering system integrity — covering meter condition, calibration status, flow computer configuration, prover performance, sampling systems, SCADA interface, and documentation completeness. Delivered with an audit-ready report including risk ratings and prioritized recommendations.
- Proving exceptions identified and root-caused
- Calibration gaps and traceability verified
- Flow computer configuration audited
- Sampling systems evaluated
- Risk-rated corrective action plan
Turnkey Metering Systems
End-to-end design, procurement, fabrication, and commissioning of metering skids and stations for both onshore and offshore applications. Covering liquid, gas, and multiphase measurement — from P&ID development through FAT/SAT to full as-built documentation packages.
- International standards compliant design
- Factory & site acceptance tested
- Complete as-built documentation package
- Commissioning and startup support
- Turnkey project delivery
Calibration & Proving Services
Scheduled calibration programs, in-situ proving operations, master meter verification, and measurement uncertainty analysis. Ensuring traceability to national and international standards with full documentation for regulatory compliance.
- Pipe prover and master meter operations
- Uncertainty analysis per ISO 5168
- Traceability to national metrology standards
- Calibration certificate management
- Proving report generation and trending
Flow Computer Services
Configuration audit, verification, and optimization of flow computers. Covering calculation verification against AGA/API algorithms, firmware assessment, data logging validation, backup/recovery procedures, and alarm configuration review.
- AGA/API calculation verification
- Configuration backup and documentation
- Firmware assessment and update planning
- Data logging and archival validation
- Alarm strategy optimization
Custody Transfer Assurance
Independent verification of custody transfer metering systems, allocation procedures, and fiscal measurement uncertainty. Including mismeasurement investigation, loss/gain analysis, ticket correlation, and allocation audit services.
- Transfer accuracy independently verified
- Mismeasurement investigation and resolution
- Allocation procedure audit
- Ticket correlation and reconciliation
- Dispute risk assessment and mitigation
24/7 Operations & Maintenance
Round-the-clock technical support for metering operations with defined SLAs. Including preventive maintenance programs, emergency response, remote diagnostics, spare parts management, and dedicated technical manpower supply.
- Defined response SLAs (remote + on-site)
- Preventive maintenance programs
- Remote diagnostic capability
- Spare parts inventory management
- KPI-driven performance reporting
Metering System Audit & Compliance
Independent third-party metering audits per API MPMS Chapter 21.2, regulatory compliance assessments, and measurement discrepancy investigation. Providing assurance to operators, regulators, and commercial partners.
- API MPMS Ch.21.2 compliance audit
- Regulatory compliance assessment
- Measurement discrepancy investigation
- Independent assurance reporting
- Corrective action follow-up tracking
FEED & Conceptual Design
Front-End Engineering and Design for new metering stations and system upgrades. Including technology selection studies, CAPEX estimation, functional design specifications, P&ID development, and metering philosophy documentation.
- Technology selection studies
- Functional Design Specification (FDS)
- P&ID and layout development
- CAPEX estimation and budgeting
- Metering philosophy documentation
Meter Technologies We Work With
Vendor-independent expertise across all major measurement technologies — selecting the right solution for your application.
Ultrasonic Meters
Transit-time and multipath technologies for high-accuracy liquid and gas fiscal measurement.
Applications: Custody transfer, fiscal gas metering, pipeline stations
Coriolis Meters
Direct mass flow and density measurement for high-value products and challenging applications.
Applications: LNG/LPG, condensate, chemical injection, bunkering
Turbine Meters
High-accuracy volumetric measurement for clean liquids and gases with excellent repeatability.
Applications: Refined products, natural gas distribution, fuel metering
Differential Pressure
Orifice plates, Venturi tubes, V-Cones, and averaging Pitot tubes per ISO 5167.
Applications: Process gas measurement, flare gas, steam, well testing
Positive Displacement
Rotary vane, oval gear, and bi-rotor meters for viscous and low-flow applications.
Applications: Crude oil LACT, condensate, fuel oil, lubricating oil
Provers & Master Meters
In-situ proving systems for meter factor determination, verification, and calibration traceability.
Applications: Pipe provers, compact provers, master meters, piston provers
Flow Computers
Configuration, verification, and optimization of flow computing platforms for fiscal calculations.
Applications: AGA/API calculations, data archival, SCADA integration
Quality Instruments
Online analytical instruments for product quality measurement and compliance monitoring.
Applications: Gas chromatographs, moisture analyzers, densitometers, BS&W monitors
Across the Full Hydrocarbon Value Chain
From wellhead to terminal — our metering expertise spans every segment of oil, gas, and energy operations.
Upstream Production
Well testing, allocation metering, LACT units, separator metering, and production accounting.
Gas Processing
Inlet/outlet fiscal metering, flare gas measurement, fuel gas accounting, and NGL metering.
Pipeline & Midstream
Pipeline custody transfer stations, pig launcher/receiver integration, and linepack measurement.
LNG & LPG
Cryogenic metering, loading/unloading fiscal measurement, and ship-shore custody transfer.
Downstream & Refining
Product blending metering, tank gauging integration, and terminal loading/offloading systems.
Power Generation
Natural gas fuel metering, steam measurement, energy accounting, and emissions monitoring.
Full Lifecycle Delivery
A structured, end-to-end approach from initial assessment through ongoing operations — ensuring quality at every stage.
Assess
Baseline evaluation of existing metering systems, gaps, and compliance status
Design
Engineering design aligned to international standards and project requirements
Procure
Equipment specification, vendor evaluation, and procurement management
Build
Fabrication, assembly, and quality control of metering skids and systems
Test (FAT)
Factory acceptance testing with witnessed inspections and documentation
Install
Site mobilization, mechanical installation, and hook-up activities
Test (SAT)
Site acceptance testing, loop checks, and pre-commissioning verification
Commission
Startup, calibration, proving, and handover to operations
Support
Ongoing operations support, maintenance, and continuous improvement
Engagement Models
From one-time assessments to long-term managed services — we adapt to your operational requirements.
Health Check
Targeted on-site assessment with an audit-ready report and prioritized action plan.
Project-Based
FEED through commissioning for new metering systems — full turnkey delivery.
Resident Engineer
Dedicated metering specialist embedded at your site for ongoing technical support.
Managed Services
Full operations and maintenance responsibility with KPI-driven performance reporting.
On-Call Support
24/7 remote and on-site response capability under defined service level agreements.
Industry Standards We Work To
All work is aligned with internationally recognized measurement standards and codes of practice.
Liquid Measurement
3 standards
Gas Measurement
5 standards
Calibration & Uncertainty
4 standards
Custody Transfer
3 standards
Safety & Design
3 standards
“Their metering health check identified calibration drift we'd been missing for months. Proving exceptions dropped by over 30% after implementing their recommendations.”
James K.
Metering Superintendent, International Gas Producer, Iraq
Frequently Asked Questions
Request Metering Services
Tell us about your metering challenges and we'll scope a solution.