Role of an Oil Gas Engineering Consultant Across the Project Lifecycle
                     QUANTA PROCESS
Oil Gas Engineering
Consultant
Engineering support across the project 
lifecycle
Process engineering • FEED • Detailed engineering • PMC • 
Commissioning
Quanta Process & Project Services Pvt. Ltd.
QUANTA PROCESS
Oil and gas projects succeed at the interfaces
A specialist consultant keeps technical decisions 
connected across disciplines, suppliers and site execution.
•Process requirements must remain consistent through every 
design stage.
•Mechanical, piping, electrical, instrumentation and civil inputs 
must align.
•Vendor data must flow back into engineering without 
creating conflicts.
•Construction and commissioning decisions must preserve 
design intent.
Oil Gas Engineering Consultant 02
QUANTA PROCESS
Five stages, one engineering thread
Each stage adds definition while preserving the same technical basis.
01 02 03 04 05
Concept FEED Detailed PMC Commission
Evaluate process Define scope, major Produce coordinated Control schedule, cost, Support testing, start-up 
options, viability and equipment, estimates discipline deliverables. vendors, quality and site and reliable handover.
operating basis. and risks. work.
Oil Gas Engineering Consultant 03
QUANTA PROCESS
Early definition reduces downstream uncertainty
Conceptual design
Tests whether the process is technically feasible, Front End Engineering Design
financially viable and operationally practical.
Turns the preferred concept into a defined scope 
that can move confidently toward detailed 
Typical focus execution.
•Process options and design basis
•Preliminary layouts and equipment needs FEED may include
•Early cost, schedule and risk inputs
Feasibility reports • cost estimation • process studies 
• debottlenecking • troubleshooting
Oil Gas Engineering Consultant 04
QUANTA PROCESS
Detailed engineering makes projects buildable
The approved process basis must be translated into 
coordinated deliverables across every discipline.
✓ Piping Layouts, isometrics, stress analysis and material specifications
✓ Instrumentation Field instruments, control panels, cable plans and layouts
✓ Electrical SLDs, equipment specifications, sizing, lighting and earthing
✓ Civil & structural Buildings, equipment foundations and pipe racks
✓ Safety HAZOP, HAZID, SIL studies and fire-protection inputs
Oil Gas Engineering Consultant 05
QUANTA PROCESS
PMC connects vendors, contractors, schedule and quality
Project management
Construction management
Baseline control
Schedule and cost monitoring
Risk, issue and action management •Master planning and project controls
Progress reporting and coordination •Contractor coordination and site supervision
•Schedule, quality and cost oversight
•EHS planning, document control and QA/QC
Procurement management
Material requisitions • technical bid analysis • expediting • 
inspection • dispatch clearance
Oil Gas Engineering Consultant 06
QUANTA PROCESS
Relevant experience across oil and gas facilities
Representative work listed by Quanta
•Surface facilities for two gas fields in Rajasthan
•Crude oil topping unit
•EPCM for a leading oil and gas company
•LNG storage and regasification facility
•Refinery gas-oil dehazing assignment
•Outfall pipeline project
Experience should be matched to each project’s actual scope, process 
conditions and execution model.
Oil Gas Engineering Consultant 07
NEXT STEP
Define the right engineering
scope before execution.
Discuss your facility, process conditions and project objectives with 
Quanta Process.
Explore Quanta’s oil and gas engineering services
Quanta Process & Project Services Pvt. Ltd.
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