Process Engineering

Senior Process Engineering | Conceptual to Commissioning

# Process Engineering That Holds Up To Audit.

P&IDs produced right first time. HAZOP actions closed out. Flare systems sized correctly. Equipment datasheets that pass vendor review. This is what 20 years of process engineering discipline delivers - across BP, TotalEnergies, Shell, ADNOC, Saudi Aramco, ExxonMobil and Mobil assets.

Scope a Project View Services
20+ Years Process Engineering

Conceptual, Pre-FEED, FEED, Detailed Design, and Commissioning.

10+ IOC Operators Served

BP, TotalEnergies, Shell, ADNOC, Saudi Aramco, ExxonMobil, and Mobil.

0 LTIs on Site Survey Assignments

Zero loss-time incidents across all data gathering and as-building campaigns.

Also need Flow Assurance? Our PhD lead covers OLGA, hydrates, slugging, and restart analysis.

Flow Assurance Page
Why It Matters

## Process engineering errors are expensive late and cheap early.

P&ID deficiencies found at HAZOP are a change order. Found at commissioning, they are a delay measured in months. Found during operation, they are a regulatory incident. The quality of your front-end process engineering defines your project cost floor.

### Poorly Developed P&IDs

P&IDs that don't reflect the operating philosophy, miss isolation points, or carry unincorporated HAZOP actions cascade errors directly into piping, instrumentation, and ESD logic. Every discipline downstream works from your P&IDs - their quality is your project's quality.

Rework at detailed design: $500K - $5M

### Undersized Flare and Relief Systems

A flare network that can't handle the blocked-outlet case or a knockout drum sized without accounting for two-phase slugs is a fundamental design error. Discovered at HAZOP it is reworked. Discovered at commissioning it is a project crisis requiring emergency re-engineering and schedule impact.

Late redesign: $1M - $8M + schedule

### Incorrect Equipment Sizing

A separator designed for nominal conditions but not the max water cut late-life case, or a pump sized without NPSHA verification for the minimum suction pressure scenario, becomes an underperforming asset from day one. Equipment sizing done once from a validated simulation model is correct forever.

Equipment replacement: $200K - $3M

### HAZOP Action Accumulation

HAZOP actions that are assigned but never formally closed out, incorporated into P&IDs without verification, or tracked in a spreadsheet nobody owns represent live regulatory liability. An IOC audit that exposes open HAZOP actions against operating facilities is a production suspension risk.

Regulatory exposure: production suspension

### Missing Design Cases in H&M Balance

A heat and mass balance that covers only the design throughput case but omits turndown, start-up, and maximum water cut scenarios produces a process model that doesn't represent the real operating envelope. Downstream disciplines then design to wrong conditions - creating systemic errors across the project.

Re-simulation + IDC rework: $300K - $2M

### Depressurisation and PSV Gaps

Manual or automatic depressurisation calculations that underestimate inventory or Mach number limits, or PSVs sized without accounting for fire case and blocked outlet simultaneously, create plant that cannot safely manage emergency conditions. This is an area where simulation shortcuts have direct safety consequences.

Incident consequence: irreversible
Core Services

## Six process engineering capabilities. All fully staffed.

Every capability below has been exercised on live IOC projects - not described from a brochure. We produce and issue these deliverables to construction standard under the operator's own quality system.

### PFDs, P&IDs and Process Documentation

Production of PFDs, UFDs, P&IDs, PSFDs, and DPDTs from concept through AFC issue - BLUEBEAM mark-up and SPPID. Full inter-discipline IDC review, HAZOP comment incorporation, Cause & Effect charts, Operating & Control Philosophy, Basis of Design, and Line Lists maintained across all project revisions. LDT automation with SINs imported to SPPID to eliminate duplication.

P&IDs | AFD | AFC PFDs | UFDs BLUEBEAM SPPID IDC

### Process Simulation and Equipment Sizing

HYSYS / UniSim steady-state and dynamics modelling for separation trains, gas compression, dehydration, slug catchers, condensate stabilisation, and gas processing facilities - all design cases. Equipment sizing for separators, PSVs, control valves, pumps, compressors, vessels, and storage tanks. PIPESIM for pipeline hydraulics. In-house simulation training capability: saved clients about $200,000 in third-party training costs.

HYSYS/UniSim SS+Dynamics PIPESIM PROSPER/GAP MBAL

### Flare, Relief and Depressurisation

Flarenet flare network design and relief load calculations across all credible scenarios. Flaresim radiation and dispersion studies. Manual and automatic depressurisation using UniSim Dynamics - 5-9 trunklines modelled simultaneously with optimum line size and shortest depressurisation time under given constraints. PSV and RO sizing, Mach number calculations, HIPPS design basis, and API 14C compliance reports.

Flarenet Flaresim UniSim Dynamics API 14C HIPPS

### HAZOP, SIL/LOPA and Process Safety

HAZOP facilitation, chairperson, and formal close-out report production to IOC standards. SIL review, LOPA, and Probability of Failure on Demand assessment for HPU/HDU and process safety systems. All actions formally tracked with justification and incorporated into affected P&IDs. HAZAN and HAZID participation. Action close-out tracked in PMCS to client milestone dates.

HAZOP | Close-out SIL/LOPA HAZAN | HAZID ISO 20815

### Utilities, Chemical Injection and Firewater

Complete utility system design to operator standards: potable and utility water, instrument and power gas, fuel gas, firewater and deluge systems, and chemical injection packages. Seawater discharge caisson sizing using Froude Number criterion. Utility balance reports for all design cases.

Utilities Firewater NFPA Chemical Injection

### Pre-commissioning and Brownfield Optimisation

Pre-commissioning system boundary definition using SCL methodology with unique colour coding. CMS population with process, electrical, instrumentation, mechanical, and piping data. Check procedure assignment. Brownfield debottlenecking - hydraulic review, line resizing, control valve and PSV datasheets, updated platform operating manuals. Proven on North Sea Shell and Perenco assets.

Pre-commissioning Brownfield CMS Debottlenecking
Deliverables Register

## Every deliverable. Produced. Checked. Issued.

The following have been produced, checked, and issued to AFC standard on live IOC projects. This is what your project receives - not a list of aspirations.

### Process Flow Diagrams (PFDs)

Produced from scratch through all project stages, incorporating HYSYS simulation results, interdisciplinary and client review comments to final issue.

### P&IDs - Red-line through AFC

BLUEBEAM mark-up and SPPID. Full IDC, HAZOP incorporation, ITT and construction issue. LDT automation with SINs to eliminate duplication.

### Heat and Mass Balance Reports

4-6 design cases: max flow, min flow, turndown, max water cut, start-up. Generated from HYSYS/UniSim with all stream conditions tabulated.

### Equipment, Line and Valve Lists

Populated with process data for all new and modified equipment; updated each revision with correct design and operating pressures and temperatures.

### Equipment and Instrument Datasheets

Process data for separators, vessels, pumps, compressors, PSVs, ROs, control valves, heat exchangers, and chemical injection packages.

### Basis of Design and Operating Philosophy

BOD, Operating and Control Philosophy, Isolation Philosophy, Design T/P Evaluation, and Tie-in Philosophy - authored and maintained across all revisions.

### Relief and Depressurisation Studies

Flarenet network calculations, Flaresim radiation/dispersion, UniSim depressurisation, PSV/RO sizing, Mach numbers, and HIPPS basis.

### HAZOP Close-out Reports

Facilitation, formal action tracking, and close-out reports. All actions incorporated into P&IDs with documented justification and revision control.

### Cause and Effect Charts

Developed and updated reflecting HAZOP actions. Interfaced with instrumentation to ensure full consistency with P&IDs and ESD logic diagrams.

### Process Simulation Reports

Hydraulic simulation reports for pipeline sizing verification, thermo-hydraulic results, PQ/TQ curves, surge volumes, and production capacity studies.

### Utility System Design Reports

Potable and utility water sizing calculations, firewater hydraulic reports, instrument gas system design, and chemical injection package sizing.

### API 14C Compliance Reports

Surface production safety system compliance verification against API 14C for wellhead and offshore topsides facilities.

Application Domains

## Onshore. Offshore. Topsides. All covered.

Process engineering deliverables produced personally on assets across four operating environments - from unmanned wellhead platforms to major onshore gas plants.

Topsides process engineering is the most deliverable-intensive discipline on any platform project. Every P&ID, every equipment datasheet, every C&E chart has a downstream consequence. We have produced complete process deliverable suites for CSP wellhead platforms, manned accommodation platforms, and ultra-sour gas processing facilities.

- Full topsides deliverable suite - PFDs, UFDs, P&IDs, Process Description, BOD, Operating and Control Philosophy, H&M Balance, Utility Balance Report, Line List, and CTRs
- ADNOC Hail and Ghasha P&ID suite - offshore drill centres, GOP facility, OPP onshore plant. SRU/TGTU marked-up; 150+ SINs automated in SPPID eliminating LDT duplications
- Utility systems to SAES standard - potable and utility water tank sizing, NPSHA, pumps, DPDT, datasheets, C&E charts, and HAZOP actions closed out
- Flare and relief system design - Flarenet relief load calculations, Flaresim radiation studies, knockout drum sizing, HIPPS design basis, and HAZOP action incorporation
- HAZOP, SIL/LOPA, Cause and Effect - facilitation, close-out reports, action tracking through PMCS to formal close-out

### Primary Tools

HYSYS/UniSim Flarenet/Flaresim BLUEBEAM/SPPID PIPESIM AFT Impulse

### Reference Projects

Ntokon and IMA Wellhead Platforms | TotalEnergies Nigeria

Pre-FEED to FEED. Complete deliverable suite for unmanned CSP platforms. 5-case H&M balance, flare radiation, relief calculations, Operating and Control Philosophy, Utility Balance. Checked subordinate engineer deliverables. Weekly client process and piping meetings.

Hail and Ghasha FEED | ADNOC (Bechtel London)

Ultra-sour gas. Offshore drill centres, GOP and OPP. P&ID development for battery limits, pig traps, SRU, TGTU. SPPID LDT automation with 150+ SINs. HAZOP participation with client.

Subsea process engineering demands absolute rigour in P&ID development and operating guideline documentation - because the consequences of an error in a subsea chemical injection schematic or an SSIV logic sequence are discovered at significant cost and delay. We have produced AFC P&IDs and operating guidelines for Shah Deniz 2 - among the world's most scrutinised subsea systems.

- AFC P&IDs for subsea systems - MVP, Production TUTU, Production SSIV TUTU/Umbilicals, HPU, HDU - 5 systems and 6 flanks produced to BP ETP standard
- Subsea Chemical Injection Operating Guidelines - hydrate inhibition during shutdown and warm/cold/tepid restart modes for all chemical needs of the Shah Deniz field
- SIL review and LOPA - Probability of Failure on Demand and reliability assessment for HPU/HDU pressure protection systems
- IR, PCN, ECN tracking - Interface Requests, Project Change Notes, and Engineering Change Notes produced and tracked for all P&ID revision changes with justification and CTR
- Subsea Interlock, Permissive and Pressure Protection Philosophy - multi-disciplinary IDC review and PMCS action tracking to formal close-out
- PSA Liquids Export Pipeline - onshore/subsea pipeline P&IDs and PFDs from scratch, BOD review, IDC on Flow Assurance Report, and HAZID attendance

### Primary Tools

HYSYS/UniSim PIPESIM BLUEBEAM/SPPID Flarenet

### Reference Project

Shah Deniz 2 | BP Azerbaijan (Wood Group Kenny)

Produced AFC P&IDs for 5 systems and 6 flanks. Updated subsea chemical injection operating guidelines for all hydrate mitigation scenarios - shutdown, warm, cold, tepid restart. SIL/LOPA for HPU/HDU. HAZOP close-out and PMCS action tracking focal point.

Offshore FPSO and fixed platform process engineering requires the H&M balance to cover the full production life - not just plateau. Separator sizing, compression configuration, and utility system design all need to work at maximum water cut, minimum GOR, and every start-up scenario. We model all of these cases and produce the deliverables to match.

- HYSYS simulation for all production cases - max and min liquid, max water cut, turndown, start-up. Heat and mass balance produced and maintained through project revisions
- Slug catcher and separator sizing - HYSYS-based liquid surge volumes, separator interface control, and receiving capacity for pigging and slugging events
- Control valve sizing and PSV datasheets - Cv calculation, process data population, vendor review
- ESD diagram review and update - process facilities, utilities, and emergency shutdown logic
- Brownfield modifications - Construction and Demolition P&IDs, line resizing, updated Heat and Mass Balance for modifications to compressor curves and new tie-ins

### Primary Tools

HYSYS/UniSim PIPESIM Flarenet AFT Impulse BLUEBEAM

### Reference Projects

Clipper Liquid Handling | Shell / AMEC (North Sea)

Debottlenecking for increased liquids production post-well intervention. HYSYS simulation, H&M balance, hydraulic review, line sizing, control valve and PSV datasheets, and Cause and Effect chart update.

SHARP Leman 27B | Perenco / KCI (North Sea)

Firewater and deluge system design, ESD diagram update, H&M balance modifications for new compressor curves, Line List and Equipment List updates.

Onshore gas plants, gathering networks, and trunkline systems require process engineering that integrates pipeline hydraulics with facility design - particularly where depressurisation safety, relief system sizing, and long-distance multiphase hydraulics all need to be resolved correctly at FEED to avoid costly re-engineering at construction.

- PIPESIM trunkline hydraulics - 5 new gas gathering trunkline sections modelled for worst-case production profile; upstream conditions from downstream sink; optimum sizes confirmed
- UniSim depressurisation study - manual depressurisation for gas re-injection trunklines; optimum size and shortest safe time under constraints determined
- Gas processing facility P&IDs - dehydration, compression, acid gas removal, NGL recovery. P&IDs developed to SAES and ADNOC standards
- NLNG Slug Catcher FEED - updated P&IDs, PFDs, H&M balance for OGGS and GTS-2/4 scope; hydrate formation study report; HAZOP participation
- Kolo Creek Trunkline Replacement - HYSYS and PETROPIPE modelling to confirm trunkline capacity; Construction and Demolition PFDs and P&IDs; Hydraulic Simulation Report

### Primary Tools

PIPESIM/PIPESIM-NET HYSYS/UniSim AFT Impulse Flarenet PETROPIPE

### Reference Projects

OGD-I and HDD-I | ADCO (ILF Abu Dhabi)

3-in-1 onshore detailed engineering. Trunkline sizing via PIPESIM, depressurisation study via UniSim, HAZOP, and close-out report. Led site survey team with zero LTIs.

CMMP | Saudi Aramco (Wood UK)

Potable and utility water design for 71-man ACP. Tank sizing, NPSHA, vent line, 2x100% pumps. P&IDs, DPDT, datasheets, and HAZOP delivered to SAES standards.

The Engineer

## Senior process engineer. Personally delivers.

Every scope is executed by our Lead Process Engineer - not delegated to a junior team. You get 20 years of experience applied directly to your project, with a trackable, auditable deliverable record behind it.

### Lead Process Engineer

Principal Process and Facilities Engineer

M.Sc. Petroleum Production Engineering - Robert Gordon University, Aberdeen | B.Eng Chemical Engineering - University of Port Harcourt | MIChemE | 20+ years upstream oil and gas

Over 20 years of upstream oil and gas process engineering experience spanning Conceptual, Pre-FEED, FEED, and Detailed Engineering for Greenfield and Brownfield projects - offshore and onshore, UK and internationally. Has personally produced, checked, and issued every major process deliverable type to BP ETP, Shell DEP, NORSOK, SAES, ADNOC DGS, and Mobil DIM standards. A zero-LTI site survey team leader, IOC-audited document controller, and in-house simulation trainer who consistently delivers on budget.

- Led multi-disciplinary site survey teams to onshore and offshore facilities for data gathering, as-building, and tie-in identification with zero LTIs, near misses, or fatalities on all assignments
- Saved clients about $200,000 as in-house HYSYS/UniSim and PIPESIM trainer - authored training manuals and delivered practical workshops using real project data
- Achieved consistently high internal audit scores through disciplined document control: secured check prints, master P&IDs, line lists, and colour-coded revision systems maintained to company quality system requirements
- HAZOP facilitation and formal close-out on Shah Deniz, NLNG, ADCO, and CMMP. SIL/LOPA for HPU/HDU pressure protection systems to BP and Shell standards
- SPPID automation of LDT with 150+ SINs for Hail and Ghasha - eliminating line designation table duplication errors and removing a significant rework risk at the ADNOC ITT stage
- Produced Subsea Chemical Injection Operating Guidelines for Shah Deniz 2 - covering all chemical needs for hydrate inhibition during shutdown and warm/cold/tepid restart, to BP ETP standard
- Consistently achieved project milestones by effective planning and workload prioritisation - no budget overruns or man-hour exceedances recorded across multi-discipline assignments

Shah Deniz 2 | BP Hail and Ghasha | ADNOC CMMP | Saudi Aramco Ntokon and IMA | TotalEnergies Clipper | Shell SHARP | Perenco Oso-RE | Mobil BOSI FPSO | ExxonMobil GTS-2/4 | NLNG OGD-I and HDD-I | ADCO PSA Pipeline | SASOL Forcados-Yokri | SPDC
Software - Proficient / Expert
HYSYS / UniSim (SS + Dynamics) PIPESIM / PIPESIM-NET PROSPER / GAP / MBAL Flarenet / Flaresim OLGA (transient) AFT Impulse BLUEBEAM / SPPID MAXIMUS / PETROPIPE / ESI
Project Track Record

## 24 years. Six continents. Every stage gate.

BP / Wood Group Kenny Shah Deniz 2

Subsea FEED | Azerbaijan

ADNOC / Bechtel Hail and Ghasha

Greenfield FEED | UAE

Saudi Aramco / Wood CMMP

Offshore FEED | KSA

TotalEnergies / Aquaterra Ntokon and IMA

Pre-FEED and FEED | Nigeria

Shell / AMEC Clipper Liquids

Brownfield | North Sea

Perenco / KCI SHARP Leman 27B

Detailed Design | North Sea

Mobil / WorleyParsons Oso-RE Pipeline

Detailed Design | Nigeria

ADCO / ILF Abu Dhabi OGD-I and HDD-I

Detailed Design | UAE

SASOL / Wood Group Kenny PSA Liquids Pipeline

FEED | Mozambique

ExxonMobil BOSI FPSO

Conceptual | Nigeria

NLNG / Aker Kvaerner GTS-2/4 Slug Catcher

FEED | Netherlands

SPDC Forcados-Yokri

FEED + Pre-comm | Nigeria

Software

## The process toolchain.

All platforms below have been applied on live IOC projects - results validated against field data and client simulation models.

Tool / Platform | Proficiency | Primary Application
--- | --- | ---
HYSYS / UniSim Design | Expert | Steady-state and dynamic process simulation - separation, compression, dehydration, depressurisation. In-house trainer.
PIPESIM / PIPESIM-NET | Expert | Pipeline hydraulics, multiphase flow, nodal analysis, line sizing, PQ/TQ curves, and trunkline capacity studies.
Flarenet / Flaresim | Proficient | Flare network design, relief load calculations, radiation and dispersion studies, and knockout drum sizing.
AFT Impulse | Proficient | Water hammer, surge analysis, pump trip transients, and accumulator and surge vessel sizing.
PROSPER / GAP / MBAL | Proficient | Production system modelling, nodal analysis, and reservoir-to-surface integration.
OLGA | Working knowledge | Transient multiphase flow - applied on Shah Deniz 2 and flow assurance IDC reviews.
BLUEBEAM / SPPID | Expert | Electronic P&ID mark-up, Smart Plant P&ID production, and LDT automation.
MAXIMUS / PETROPIPE / ESI | Proficient | Legacy pipeline hydraulic tools applied on SPDC, MPN, and ADCO onshore scopes.

Engagement Model

## Structured. Auditable. On budget.

Our workflow aligns with IOC project gate processes - every phase is documented, traceable to design basis, and delivered within allocated man-hours.

01

### Design Basis and Data Review

Confirm fluid characterisation, process conditions, design cases, and applicable operator codes and standards.

02

### Simulation and Sizing

HYSYS/PIPESIM process models, heat and mass balance for all cases, equipment and line sizing calculations, and PSV/RO sizing.

03

### P&IDs and Documents

PFDs, P&IDs, UFDs, PSFDs, datasheets, Cause and Effect charts, and all supporting process documentation - IDC reviewed.

04

### Safety Reviews

HAZOP facilitation, SIL/LOPA, action tracking, flare and relief studies, and formal close-out reports with traceability.

05

### Issue and Handover

Final deliverable issue to IFC/AFC, operating philosophy verification, and full document handover with revision history.

Cross-Discipline Support

## Also need flow assurance?

Our PhD Flow Assurance Consultant covers OLGA-based transient simulation, hydrate management, slugging analysis, wax and restart studies, and water injection surge - on Shah Deniz 2, BP Angola Block 18, ACG Azerbaijan, and Malaysia deepwater assets. Both disciplines, one team.

View Flow Assurance Services
Engage NIQ

## Your process scope has a solution.

FEED process engineering, targeted simulation studies, HAZOP facilitation, brownfield debottlenecking, or pre-commissioning support - delivered by a senior engineer with a direct track record on equivalent assets.

Request a Consultation +234 903-305-8380
Email info@niqong.com
Phone+234 903-305-8380
Web www.niqong.com
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