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Front End Engineering
Consultancy

Services

Engineering Services
for Upstream Oil & Gas

Ten focused service areas spanning project definition, process and EC&I engineering, safety, delivery, and independent review. Every engagement is performed in-house by the FEEC principals named in the proposal, without associates or subcontractors.

01 Concept Development & FEED02 Detailed Process Engineering03 Process Simulation04 Process & Functional Safety05 Project & Construction Management06 Commissioning & Start-up07 EC&I Engineering08 Brownfield & Debottlenecking09 Independent Review & Due Diligence10 Cost Estimation & Risk Analysis

01

Concept Development & FEED

Front End Engineering Design studies that define project scope, cost, and schedule with the accuracy needed for investment decisions.

Our FEED studies provide operators and investors with a robust technical basis for project sanctioning. We take projects from process concept through a defined engineering package that can include the process design basis, mass and energy balances, equipment lists, interfaces, and preliminary cost estimate.

FEEC has delivered studies for onshore production facilities, offshore platforms, MOPU topsides, FPSOs, and early production systems. For offshore and floating facilities, the scope can include equipment weight and space allocation for topsides criteria and structural interfaces. Assumptions and design margins are matched to the applicable codes, operating envelope, project stage, and quality of available data.

Standards: API, ASME, ISO, NORSOK, local regulatory requirements.

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Further reading

What is a FEED study?

Key Deliverables

  • Block Flow Diagrams (BFDs)
  • Process Flow Diagrams (PFDs)
  • Piping & Instrumentation Diagrams (P&IDs)
  • Process Design Basis
  • Heat and Material Balances (H&MBs)
  • Equipment Datasheets and Lists
  • Process Narrative
  • Weight and Space Estimates (offshore)
  • Preliminary Capital Cost Estimate
  • Plot Plan and Equipment Layout

02

Detailed Process Engineering

Controlled process-engineering deliverables for procurement, fabrication, construction, and commissioning.

From FEED approval to IFC, FEEC develops the process documents and interdisciplinary inputs defined in the agreed scope. We work with AutoCAD and industry-standard tools to produce controlled deliverables that meet project specifications and applicable standards.

Our principals have delivered detailed process-engineering packages for facilities ranging from skid-mounted early production units to multi-train gas plants. The scope can include 3D-model review and systematic vendor-document review so procured equipment remains aligned with the process design intent.

Standards: Client specifications, API RP 14C, ISA 5.1, ISO 10418.

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Key Deliverables

  • IFC P&IDs (AutoCAD)
  • Line Lists and Pipe Specs
  • Equipment Design Calculations
  • Instrument Index and Datasheets
  • Cause-and-Effect (C&E) Matrices
  • Electrical Load Lists
  • Utility Flow Diagrams (UFDs)
  • Engineering Flow Diagrams (EFDs)
  • Vendor Document Review
  • Pipe Stress Analysis Input

03

Process Simulation

Steady-state and dynamic process modelling — equipment sizing, relief load studies, ESD transient analysis, and operational troubleshooting.

Process simulation is central to everything we do. Our consultants have extensive experience building and validating steady-state and dynamic simulation models for upstream and midstream facilities using industry-standard process simulators.

Where a steady-state model answers sizing questions, dynamic simulation answers operational ones — emergency shutdown transients, control valve sizing, slug flow behaviour, and depressuring analysis. We use dynamic simulation to validate ESD logic, confirm relief system behaviour under worst-case transient conditions, and support control system design. Simulation models are delivered with full source files, not just reports, so clients can run their own sensitivity cases.

Standards: API 520, API 521, API 526, API 14E, NORSOK P-001.

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Key Deliverables

  • Steady-State Process Models
  • Dynamic Simulation Models
  • Equipment Sizing Calculations
  • Heat Exchanger Design and Rating
  • Separator Sizing and Performance
  • Compressor Train Analysis
  • Flash and Phase Equilibria Studies
  • Flare and Relief Load Studies
  • Emergency Depressuring Analysis
  • Process Optimisation Reports

04

Process & Functional Safety

HAZID, HAZOP, SIL/LOPA, bow-tie analysis, area classification, and SIS lifecycle support to applicable standards.

Our principals have led or participated in 50+ HAZID and HAZOP engagements across onshore and offshore facilities. FEEC provides facilitation, clear workshop records, and structured action registers, with issue timing agreed before each workshop.

For Safety Instrumented Systems, FEEC supports the allocated IEC 61511 lifecycle phases, including SIL classification, LOPA, Safety Requirements Specification development, and proof-test procedure design. The proposal defines FEEC’s exact role, deliverables, and any required independence between preparation, checking, and assessment.

Standards: IEC 61511, IEC 61508, IEC 60079, API RP 14C, API 14J, NORSOK Z-013.

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Key Deliverables

  • HAZID Study Report
  • HAZOP Study Report and Action Register
  • LOPA Worksheets
  • SIL Determination Report
  • Safety Requirements Specification (SRS)
  • Functional Safety Review Support
  • Bow-Tie Analysis
  • Electrical Area Classification (ATEX/IECEx)
  • Risk Register
  • What-If Analysis
  • Pre-Startup Safety Review (PSSR)

05

Project & Construction Management

End-to-end project and construction management for fast-track oil & gas campaigns across six continents.

Our project management capability spans all phases — from project setup and engineering scope definition, through procurement and contracting, to construction and handover. Our project management principals bring 25+ years of field experience across six continents, with a track record of managing international contractors, complex supply chains, and multi-discipline engineering teams from concept through operational handover.

We understand the pressures of fast-track projects and the commercial realities of operating budgets. Our approach is pragmatic — focused on delivering to schedule and budget without creating unnecessary risk. We integrate directly with client teams, act as owner's engineer when required, and maintain clear cost and schedule accountability throughout.

Standards: PMI PMBOK, client project management systems.

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Key Deliverables

  • Project Execution Plan (PEP)
  • Project Schedule (Primavera / MS Project)
  • Procurement Strategy and Tender Documents
  • Vendor Evaluation and Selection
  • Construction Management and Supervision
  • Cost Reporting and Change Management
  • Owner's Engineer Services
  • Project Closeout Report

06

Commissioning & Start-up

Field commissioning and start-up support for new facilities, plus Pre-Startup Safety Reviews and operating procedure development.

Commissioning is where engineering decisions become operational reality. Our consultants provide onsite commissioning support for new facilities, ensuring the handover from construction to operations is safe, systematic, and well-documented. We develop start-up procedures that reflect how the plant actually behaves — not generic templates copied from another project.

We provide Pre-Startup Safety Reviews (PSSR) as a formal deliverable, confirming that startup-critical hazard actions are resolved or implemented, safety systems are verified, and operating procedures are in place before hydrocarbon introduction. Applicability and approval criteria are defined against the host jurisdiction, operator management system, and project requirements.

Standards: API RP 14C, IEC 61511 (SIS commissioning and proof test requirements), client commissioning management system procedures, applicable NORSOK operational standards.

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Related work

Well Test Vessel

Key Deliverables

  • Commissioning Procedures
  • Pre-Commissioning Punch Lists
  • System Completion Dossiers
  • Start-up Procedures
  • Pre-Startup Safety Review (PSSR)
  • Operating Manual Review
  • Performance Test Procedures
  • Handover Documentation

07

EC&I Engineering

Electrical, control, and instrumentation engineering from system philosophy and instrument definition through area classification and SIS requirements.

EC&I is a core FEEC capability, with 30+ years of principal-level experience across greenfield design, brownfield modification, and IEC 61511 lifecycle work.

The agreed scope can cover measurement and control philosophy, instrument datasheets, hook-up drawings, cable schedules, area classification, load lists, single-line diagrams, and system interfaces. FEEC coordinates directly with client-appointed equipment and system vendors where their inputs are required.

Standards: IEC 61511, IEC 60079, ISA 5.1, ISA 18.2, NORSOK E-001, IP15.

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Key Deliverables

  • Control Philosophy Document
  • Instrument Index and Datasheets
  • Cause and Effect (C&E) Matrices
  • Instrument Hook-up Drawings
  • Cable Schedules and Tray Layouts
  • Electrical Area Classification (ATEX/IECEx)
  • Electrical Load List
  • Single-Line Diagrams (SLDs)
  • SCADA Architecture and I/O Lists
  • Safety Instrumented System (SIS) Design to IEC 61511

08

Brownfield & Debottlenecking

Capacity optimisation, revamp studies, and modification engineering for existing facilities — with the practical perspective of engineers who have operated them.

Brownfield engineering starts with the actual operating envelope, facility history, interfaces, and shutdown constraints. FEEC applies direct operator-side experience to challenge assumptions and identify what can be changed safely and practically.

The scope can cover capacity debottlenecking, process revamps, life-extension inputs, modification engineering, and Management of Change support. Options are compared using documented constraints, implementation risks, and cost-benefit considerations.

Standards: API RP 14C, API RP 580 (risk-based inspection), client HSE and Management of Change procedures, NORSOK Z-008.

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Key Deliverables

  • Capacity and Debottlenecking Study
  • Process Revamp Engineering Package
  • Modification Design Basis and P&IDs
  • Management of Change (MoC) Support
  • Brownfield HAZOP / Operability Review
  • Life Extension Assessment
  • Operating Manual and Procedure Reviews
  • Performance Benchmarking Report
  • Shutdown and Turnaround Planning Support

09

Independent Review & Due Diligence

Independent engineering assessments for asset acquisition, project sanction, and lender requirements — delivered by senior engineers with operator and EPC experience on both sides of the table.

When the stakes are high, an independent second opinion is not a luxury — it is a discipline requirement. We provide technical due diligence assessments for upstream and midstream asset acquisitions, reviewing process design, production assumptions, equipment condition, and operating cost basis against industry norms and our own field experience.

For project sanctioning, we offer independent peer review of FEED packages — identifying technical risks, challenging assumptions, and confirming that the design basis is fit for purpose before capital is committed. Our team has sat on both sides of these reviews: as project engineers whose work has been reviewed, and as independent assessors doing the reviewing. We understand what a credible technical review looks like and what it is trying to achieve.

Standards: API RP 14C, API 521, NORSOK Z-013, SPE PRMS (reserves and resources assessments), applicable lender and operator technical standards.

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Key Deliverables

  • Technical Due Diligence Report
  • Asset Acquisition Assessment
  • Independent FEED Peer Review
  • Design Basis Audit
  • Production Forecast Review
  • OPEX/CAPEX Reasonableness Assessment
  • Technical Risk Register
  • Lender's Technical Advisor Report
  • Expert Opinion and Dispute Support

10

Cost Estimation & Risk Analysis

AACE Class 3–5 capital cost estimates, OPEX modelling, and contingency analysis to underpin project sanction and investment decisions.

A cost estimate is only as good as the basis behind it. We build capital cost estimates to defined AACE International classes — from Class 5 order-of-magnitude screening through Class 3 estimates firm enough to support a funding decision — each issued with a transparent Basis of Estimate that states exactly what is included, what is excluded, and where the numbers come from.

Our estimating combines factored equipment costs, benchmarked unit rates, and quantity take-offs from the engineering deliverables, tightened as the design matures. We quantify uncertainty rather than bury it: cost risk analysis and probabilistic (Monte Carlo) contingency setting give a P50/P90 range instead of a single deterministic figure, so decision-makers can see the confidence behind the number. The same discipline supports OPEX modelling and CAPEX/OPEX reasonableness reviews for acquisition and lender due diligence.

Standards: AACE 18R-97 (cost estimate classification), AACE 17R-97, AACE 34R-05 (basis of estimate), AACE 42R-08 (contingency determination), client cost estimating procedures.

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Key Deliverables

  • Basis of Estimate (BoE)
  • AACE Class 3 / 4 / 5 Capital Cost Estimate
  • Factored and Detailed Equipment Costing
  • OPEX / Lifecycle Cost Model
  • Cost Risk Analysis (Monte Carlo)
  • Contingency and Escalation Analysis
  • Cost Benchmarking Report
  • CAPEX/OPEX Reasonableness Review

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