OGCI Nigeria Ltd is proud to announce the successful completion of a major annual recertification project for one of Nigeria’s leading Oil and Gas operators. Our team delivered exceptional results, completing the comprehensive prover loop and fiscal instrument recertification ahead of schedule while maintaining our perfect safety record.
Our Process Measurement and Controls Division was engaged to perform the critical annual recertification of the client’s prover loop and fiscal measurement instruments. This essential work ensures the accuracy and reliability of custody transfer measurements that form the financial backbone of petroleum operations.
Industry Standards & Regulatory Compliance
The project was executed in full compliance with internationally recognized standards and local regulatory requirements:
- API Manual of Petroleum Measurement Standards (Chapters 4, 5, 11, 12,14)
- Nigerian Upstream Petroleum Regulatory Commission (NUPRC) Procedure guidelines
Why Meter Proving Matters
Flow metering systems serve as the ‘cash registers’ of the petroleum industry. Even small errors in meter factors can generate enormous financial discrepancies in a remarkably short time. Regular meter proving is not just a technical necessity—it’s a critical business imperative.
Key Benefits of Regular Meter Proving:
- Ensures measurement accuracy throughout equipment lifetime
- Minimizes operational losses and maximizes profitability
- Prevents costly invoicing errors and revenue discrepancies
- Maintains regulatory compliance and industry standards

Installation of Emerson Coriolis Meter on Client Production Facility
State-of-the-Art Meter Proving Systems & Measurement Expertise
OGCI Nigeria Ltd deploys advanced skid-mounted meter proving systems engineered for high-accuracy fiscal and custody transfer applications across upstream, midstream, and terminal operations. Our experienced metering engineers utilize industry-certified proving equipment and precision instrumentation to ensure reliable, repeatable, and standards-compliant measurement verification.
The integrated proving skids are equipped with:
- High-accuracy master meter proving systems
- Fiscal-grade flow measurement instrumentation
- Precision pressure and temperature transmitters
- Integrated flow conditioning and piping assemblies
- Automated data acquisition and meter proving controls
- Compact skid-mounted design for rapid field deployment
- API MPMS-compliant proving and calibration capabilities
These mobile and skid-mounted proving systems are designed to support LACT units, Coriolis meters, ultrasonic meters, turbine meters, and other custody transfer metering applications, ensuring optimal measurement integrity, reduced uncertainty, and regulatory compliance.

OGCI Compact Mobile Prover Units
Comprehensive Hydrocarbon Metering & Measurement Solutions
OGCI Nigeria Ltd provides a full spectrum of hydrocarbon measurement, meter proving, calibration, and metering system support services for upstream, midstream, terminal, and processing facilities across both onshore and offshore operations. Our experienced metering engineers and mobile proving systems deliver reliable, standards-compliant solutions aligned with API MPMS, AGA, GPA, ISO, and NUPRC measurement requirements.
Our skid-mounted and mobile proving systems can be deployed directly to client facilities, or services can be performed through our in-house workshop and calibration capabilities.
Meter Proving, Calibration & Verification Services
- Fiscal meter proving and calibration (Onshore & Offshore)
- API MPMS-compliant master meter and compact prover services
- High-volume displacement prover operations
- Meter factor verification and uncertainty validation
- LACT unit recertification and custody transfer verification
- On-site and workshop-based calibration services
- Fiscal allocation and hydrocarbon accounting support
Metering System Installation, Maintenance & Repairs
- Installation, commissioning, and maintenance of fiscal metering systems
- Coriolis, ultrasonic, turbine, positive displacement, and orifice metering systems
- Onshore and offshore meter repairs and troubleshooting
- Natural gas meter run inspection and primary device repairs
- Turbine meter swap-out and recertification programs
- Orifice plate inspection, repair, and replacement services
- Meter skid and prover loop integration support
Hydrocarbon Analysis & Measurement Integrity Services
- Gas chromatograph installation, calibration, and maintenance
- Produced gas and liquid sampling and analysis
- Hydrocarbon fluid property determination and verification
- Pressure, temperature, and density instrumentation verification
- Measurement system audits and integrity assessments
- Regulatory and standards compliance evaluations
Metering Equipment Supply & Turnkey Solutions
- Supply of new fiscal meters (Ultrasonic, Coriolis, Turbine, PD, and more)
- Advanced fiscal metering skid packages and prover systems
- Complete custody transfer metering solutions
- Turnkey metering system engineering, procurement, installation, and commissioning
- Integrated measurement automation and data acquisition systems
OGCI Nigeria Ltd remains committed to delivering high-accuracy, reliable, and audit-defensible measurement solutions that help operators maintain measurement integrity, reduce uncertainty, minimize hydrocarbon losses, and ensure commercial and regulatory compliance throughout the lifecycle of their metering assets.
Partner with OGCI for Your Meter Proving Needs
Don’t let measurement drift impact your bottom line. Our experienced team is ready to help ensure your metering systems operate at peak accuracy.