Oil & Gas · Offshore & Onshore

Asset reliability for
the world's most
demanding operations

From North Sea platforms and FPSOs to brownfield tie-ins and onshore processing facilities — Optimal delivers structured asset performance management that reduces unplanned downtime, extends asset life and protects production revenue.

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North Sea · Offshore O&G

92→98%

Gas turbine availability target achieved. 40 vulnerabilities identified and mitigated across two offshore platforms.

Offshore FPSO · Life Extension

7,800

Maintainable items registered. 511 equipment groups structured to support a full asset life extension programme.

West Africa · Brownfield Tie-In

Day 1

CMIMS active from first gas. Full MIE programme with RBI, SECE compliance and operational readiness assured.

North Sea · UKCS

West Africa · Offshore

LNG · Norway

Offshore FPSO

Brownfield & Greenfield

RCM · RBI · ISO 14224

SAP · Maximo · OSIsoft PI

The Industry Challenge

Margin pressure, ageing assets
and unacceptable downtime

Oil and gas operators face a converging set of pressures that make structured asset management not optional — but essential. Declining reservoir yield from mature fields, the capital intensity of offshore infrastructure, regulatory scrutiny from the HSE and OPRED, and an industry-wide talent attrition problem all compound the challenge of maintaining production reliability.

The organisations that outperform are not those with more data or newer platforms — they are those with structured, repeatable processes for turning data into maintenance decisions that prevent failure rather than respond to it.

How ARaaS® solves this

Ageing offshore infrastructureAssets operating beyond original design life. Fatigue, corrosion and obsolescence driving escalating maintenance cost and unplanned shutdown risk.

Reactive maintenance cultureHigh corrective-to-planned maintenance ratios. Fire-fighting displaces proactive work, creating a cycle that is expensive to break.

Data without structureCMMS populated but not trusted. Poorly structured asset hierarchies produce unreliable work order data that can't drive meaningful analysis.

Regulatory and SECE complianceSafety-Critical Element schedules that are overdue, incomplete or not aligned to current risk profiles — creating audit exposure and HSE liability.

Skilled resource scarcityLoss of experienced reliability and integrity engineers. Knowledge walking out the door faster than it can be replaced or documented.

Engineers reviewing reliability data for offshore oil and gas operations

The Optimal Approach

Structure first.
Then optimise.

Optimal's approach to Oil & Gas reliability is grounded in one principle: you cannot optimise what is not structured. Before predictive analytics, before digital dashboards, before any tooling — asset hierarchies must be right, failure modes must be documented, and maintenance strategies must be defensible.

The ARaaS® framework provides exactly that structure — then compounds it. Each engagement builds on the last, progressively improving the quality of your asset data, the precision of your maintenance strategy, and the reliability of your asset base.

ISO 14224 & RDS-PP compliant asset structuring →

RCM-based maintenance task development →

Risk Based Inspection (RBI) and API 579 assessments →

SECE performance standard development and review →

Predictive and prescriptive maintenance deployment →

CMMS / EAM population, cleansing and validation →

Explore the ARaaS® framework

Asset Integrity & Life Extension

Extending productive life.
Managing risk intelligently.

For operators running assets beyond original design life, Optimal provides the engineering rigour to make that decision safely and to maintain HSE confidence throughout. From API 579 fitness-for-service assessments to full RBI programmes, we build the evidence base that justifies continued operation — and the inspection strategies that maintain it.

API 579 Fitness-for-Service assessments for life extension decisions

Risk Based Inspection (RBI) programme development and management

Corrosion management strategy and inspection optimisation

Safety-Critical Element (SECE) performance standard review

Structural integrity assessments and anomaly management

Pressure systems and lifting equipment compliance

Decommissioning and mothballing guidance — UKCS upstream (published with The Energy Institute, ISBN 978 1 78725 124 3)

Asset Integrity Services Speak to an engineer

Services for Oil & Gas

Everything an operator
needs — nothing superfluous

Optimal's full Oil & Gas capability, from pre-commissioning through to late-life integrity and decommissioning preparation.

Reliability Centred Maintenance

FMEA & RCM studies — offshore and topsides

Maintenance task rationalisation

SAP-compliant task library development

35,000+ maintainable items library

Shutdown and turnaround optimisation

Asset Integrity & Inspection

Risk Based Inspection (RBI) — API 580/581

API 579 Fitness-for-Service

SECE performance standards

Corrosion management strategy

Structural and pressure systems integrity

Operational Readiness

Commissioning & pre-start-up assurance

Asset register development — ISO 14224, RDS-PP

CMIMS population and validation

Spares philosophy and cataloguing

Day 1 maintenance systems readiness

Digital & Predictive Maintenance

Predictive analytics — OSIsoft PI, OSIsoft PI

Anomaly detection and condition monitoring

EAM / CMMS implementation and optimisation

Asset Performance Management platforms

Data cleansing and enrichment

Lifecycle Management

RAM modelling and lifecycle cost analysis

Asset life extension programmes

ISO 55001 gap assessment and advisory

Obsolescence and replacement strategy

Decommissioning preparation

Spares & Materials Management

Critical spares rationalisation and optimisation

Inventory strategy and stocking levels

Materials data cleansing and governance

Preservation and storage management

Supplier rationalisation and contract review

Trusted by Oil & Gas Operators

Optimal has delivered asset performance programmes for operators across the North Sea, West Africa, Norway and the Middle East — including:

CNOOC · North Sea

TotalEnergies EP Nigeria

Major North Sea Operator

Repsol Sinopec

EnQuest

Anasuria Operating Company

Independent E&P Operator

The Energy Institute

Detailed case studies below are anonymised. Client consent is required before specific project details are attributed publicly. Contact us for reference calls with relevant operators.

Case Studies — Oil & Gas

Proven delivery across
every upstream challenge

All case studies

Oil & Gas · North Sea · UKCS

Major Offshore Operator — Two Platforms

Power Generation RCM & Maintenance Review

Five gas turbine packages across two North Sea platforms — three PGT25 and two LM2500 Dual Fuel Aeroderivative units — operating significantly below availability targets, with unplanned shutdowns causing production interruption during load shedding and switchover events.

Results delivered

92→98%

Availability target pathway defined. Full holistic RCM study covering all power generation systems, including vendor support task alignment in SAP-compliant format

New vulnerabilities identified across turbine packages. Mitigation activities defined in Vulnerability Report; updated spare parts lists with preservation recommendations

Oil & Gas · Offshore FPSO

FPSO Operator — Asset Life Extension Programme

Asset Register Development & RCM Strategy

Offshore FPSO transitioning from early-life into an extended operational phase. No structured asset register or defensible maintenance strategy in place to support lifecycle management, integrity assurance or long-term operability planning.

Results delivered

7,800

Maintainable items registered across the full FPSO asset base — ISO 14224 and RDS-PP compliant, forming the foundation for all subsequent RCM and integrity work

511

Equipment groups structured with Bills of Material, criticality classifications and maintenance task sets — lifecycle management programme now fully operational

Oil & Gas · West Africa · Brownfield

Major Upstream Operator — Brownfield Tie-In

Maintenance & Inspection Engineering (MIE)

New well pad cluster facilities integrated into an existing Treatment Centre. Brownfield tie-in with live production infrastructure required complete maintenance systems, corrosion management, SECE compliance and fully populated CMIMS — all before first gas.

Results delivered

Day 1

CMIMS fully populated and maintenance systems operational from first gas. Asset hierarchy, PM tasks and spare parts strategy all in place at handover

Full

RBI programme, WSE, corrosion management and SECE performance standards embedded. Baseline inspections completed pre-commissioning to eliminate early-life failure risk

Oil & Gas · West Africa · Commissioning

Major Upstream Operator — Brownfield Start-Up

Pre-Commissioning & Commissioning (COMM)

Same brownfield integration project — transitioning from mechanical completion to live production. SIMOPS risks during integration with live processing infrastructure, with stringent requirements for sequential commissioning, functional testing, and zero-defect handover before first gas.

Results delivered

Safe

Start-up achieved without major incident. Structured commissioning execution — MC verification, MSC processes, loop checks, SIMOPS coordination and start-up sequencing all delivered

Zero

Gap at handover. Procedures, trained personnel, verified systems and performance criteria all in place prior to steady-state production. Early-life failure risk materially reduced

LNG · Norway · Life Extension

LNG Liquefaction Plant Operator — Norway

Residual Life Assessment (RLA)

LNG liquefaction plant moving from early-life reliability phase into a more mature operational phase with ageing equipment. No baseline condition assessment existed to support integrity decisions, life extension planning or targeted maintenance investment.

Results delivered

RLA

Toolkit developed and fully populated. Desktop asset verification completed — key equipment and degradation mechanisms identified and condition-scored for RLA scope inclusion

Full

Historic maintenance review completed. CMIMS data gaps addressed — missing tags captured from the master equipment list. Foundation for life extension studies established

Digital Engineering

Turning operational
data into decisions

Oil & Gas assets generate vast quantities of operational data. The organisations that turn that data into production advantage are those with the analytical capability to identify failure signatures before they become shutdowns — and the maintenance systems to act on them.

Optimal deploys predictive and prescriptive maintenance programmes across offshore and onshore infrastructure, integrating with OSIsoft PI, SAP PM, IBM Maximo and bespoke CMMS environments.

Real-time anomaly detection and condition monitoring →

ML-powered prognostics for critical rotating equipment →

Asset Performance Management platform deployment →

CMMS data cleansing, enrichment and governance →

Work order quality improvement programmes →

Predictive maintenance services

Digital engineering and predictive maintenance technology

Asset reliability for
the world's most
demanding operations

Margin pressure, ageing assets
and unacceptable downtime

Structure first.
Then optimise.

Extending productive life.
Managing risk intelligently.

Everything an operator
needs — nothing superfluous

Proven delivery across
every upstream challenge

Turning operational
data into decisions

How does your Oil & Gas operation
compare with global peers?

Ready to shift from
reactive to reliable?

Optimal across
asset-intensive sectors

Asset reliability forthe world's mostdemanding operations

Margin pressure, ageing assetsand unacceptable downtime

Structure first.Then optimise.

Extending productive life.Managing risk intelligently.

Everything an operatorneeds — nothing superfluous

Proven delivery acrossevery upstream challenge

Turning operationaldata into decisions

How does your Oil & Gas operationcompare with global peers?

Ready to shift fromreactive to reliable?

Optimal acrossasset-intensive sectors

Asset reliability for
the world's most
demanding operations

Margin pressure, ageing assets
and unacceptable downtime

Structure first.
Then optimise.

Extending productive life.
Managing risk intelligently.

Everything an operator
needs — nothing superfluous

Proven delivery across
every upstream challenge

Turning operational
data into decisions

How does your Oil & Gas operation
compare with global peers?

Ready to shift from
reactive to reliable?

Optimal across
asset-intensive sectors