Oil & Gas · Subsea Engineering
Deepwater Subsea
Completions
& Well Intervention
Specialist deepwater petroleum engineering consulting — from well completion design through live intervention. 20+ years of global experience, delivered locally in Guyana.
20+
Years Deepwater Experience
15+
International DW Projects
$400MM+
Project Cost Savings Delivered
8+
Countries of Operation
Specialized Technical Engineering Consulting for Deepwater Oil & Gas
Tryall Energy Guyana Inc (TEGI) is pleased to offer specialized technical engineering consulting services in Deepwater Subsea Completions and Well Intervention Engineering.
With over 20+ years of international deepwater oil & gas petroleum engineering experience, our consulting expertise is built on delivering safe, efficient, and technically sound well engineering solutions across complex offshore environments. Our team has contributed to world-class greenfield and brownfield developments, providing strategic and operational support from concept through execution.
TEGI is uniquely positioned as a local Guyanese partner with global technical competence, supporting operators and service companies executing projects within Guyana and internationally.
Lead Engineer Profile
Degreed Petroleum Engineer
BEng — Petroleum Engineering Major
Full Lifecycle Well Engineering Capabilities
Well Completion Engineering
- Upper completion design (tubing, casing, packers)
- Intelligent / smart well systems integration
- Material selection and integrity assurance
- Completion fluids and brine design
- Interface management (drilling, subsea, production systems)
Lower Completion Design
- Sand control systems and completion hardware
- Perforation strategy and execution planning
- Hydraulic fracturing (frac) design support
- Reservoir interface optimization
- Drilling fluids and brine design
Well Intervention & Well Services
- Rig-based and rigless intervention planning
- Coiled tubing, wireline, and subsea intervention design
- Plug & abandonment (P&A) engineering
- Intervention risk assessment and mitigation
- Onshore and offshore supervision and technical assurance
Operational Support
- Well equipment preparation and inspection
- Wellsite supervision during critical operations
- Daily well surveillance and performance monitoring
- Troubleshooting and real-time engineering support
- Handover to production and startup optimization
Production Optimization
- Well performance diagnostics
- Remedial intervention strategies
- Flow assurance considerations
- Lifecycle asset performance enhancement
What We Do — At a Glance
Engineering & Supervision Services
Operational Drivers — Safety · Quality · Delivery · Cost
Every engagement is executed within a rigorous Well Delivery Excellence (WDX) framework, championing SQDC drivers across all rig teams, engineering teams, and vendor partners.
Zero
EHS Incidents Target
<15%
NPT Downtime Goal
SQDC
Safety · Quality · Delivery · Cost
$40MM+
Operational Efficiency Savings
NPT Reduction Initiative
LEAN Process: Plan › Do › Check › Act
Reduce Non-Productive Time through focused Root Cause Failure Analysis (RCFA) of key NPT factors. Full engagement of service partners — shared ownership of NPT reduction performance plans.
Keys to Operational Success
- All required equipment mobilized to rig in a timely manner
- Equipment checked and functioned before required
- Correct procedures and plans — proven design
- Good communication between personnel on rig
- Competent on-site personnel and due diligence
- Good integration of ALL services
Global Project Experience
Lead Completion & Well Intervention Engineer on 15+ international deepwater projects across greenfield and brownfield developments. Drilling assets include Noble Corporation and Stena Drilling rigs.
United Kingdom
BG Armada Field
1995–2002Field Drilling Engineer
Night supervision, casing & cementing design, daily well reporting
ExxonMobil Beryl & Subsea Fields
1995–2002Subsea Well Operations Engineer
Cameron Horizontal XT — 6 successful subsea well completions; full lifecycle management
Hess Scott & IVRR Fields
1995–2002Completions & Intervention Engineer
Two +10,000 bopd subsea tieback wells delivered; Vetco Gray Horizontal XT
Hess Telford Field
1995–2002Well Intervention Engineer
First UK asset to use Seawell intervention vessel for cost-effective productivity improvement
UK Ivanhoe Rob Roy Field
1995–2002Completion Intervention Engineer
One of the first UK subsea developments — managed Tubing Scaling (BaSO4) and H2S challenges
Gulf of Mexico
Hess GOM — Conger Field
2007–2019Deepwater Completion Intervention Engineer
10-well workover & intervention campaign; SMART Intelligent well completions. FCMEA saved ~$400MM
Penn State & Llano Fields
2007–2019Deepwater Completion & Well Intervention Engineer
First 15K Subsea XT development using FMC Horizontal & Vertical systems. Design savings ~$100MM
Baldpate Field
2007–2019Deepwater Completion Engineer
Subsea completion design and operational execution for deepwater GOM asset
NOJV Shenzi Field
2007–2019NOJV Completion Engineer
Representing Non-Operator — water injection review, optimization, collaborative working with Operator D&C Team
Africa
Total Girassol & Dahlia — Angola
2002–2005Subsea Operations Engineer
FMC Vertical Subsea XT — subsea asset inspection, repair, maintenance and FPSO topside integration
Hess Okume, Elon & Ceiba — Equatorial Guinea
2002–2007Completion Engineer
Multi-layer thin sand lower completion; cased hole frac pack & OHGP. Optimized injection well design for significant savings
Far East & Latin America
Hess Peru — Situchie Field
2005–2007Welltest Engineer
Well test engineering and execution for South American deepwater asset
Hess Thailand — Phu Horm Field
2005–2007Completion Engineer
Completion engineering for South-East Asian gas field development
Guyana — Liza Field Completion Design
Liza Completion Design
The Liza completion design is based on an openhole gravel pack for the lower completion. It utilizes a formation isolation valve and tubing suspension valve to enable installation of the upper completion and Xmas Tree — based on a 2-barrier policy.
- Openhole gravel pack lower completion
- Formation isolation valve
- Tubing suspension valve (2 control lines)
- Upper completion + Xmas Tree installation
- 2-barrier well integrity policy
Consultant Proposed Well Design
On evaluating and reviewing the Liza Well Design, the following concept is proposed to simplify, reduce operational risk, lower cost, and increase well operability.
Key Design Change
The lower Tubing Suspension Valve (controlled by 2 control lines) is removed and replaced with a Disappearing Plug and Circulating Valve — reducing complexity and failure risk.
~$4MM
Estimated cost reduction per well · Reduced risk of well failure
Core Competencies
Our Value Proposition
Local Content Advantage
TEGI is the leading local Guyanese partner — bringing international expertise with boots-on-the-ground presence in Georgetown.
Operator-Level Experience
Trained and developed by ExxonMobil, Hess, and TotalEnergies — delivering operator-calibre engineering without the overhead cost.
Seamless Integration
Proven capability across drilling, subsea, and production disciplines — the full lifecycle from concept through execution.
Proven Track Record
Lead engineer on 15+ world-class deepwater projects with documented $400MM+ in project cost savings delivered.
Rapid Deployment
Flexible and available for both planned operations and emergency interventions — responsive to your schedule.
Engagement Models
Project-Based Consulting
Design through execution — end-to-end engagement for a single project lifecycle.
On-Demand Engineering Support
Call on TEGI expertise when you need it, without a long-term commitment.
Wellsite Representation & Supervision
Experienced eyes on-site during critical operations.
Retainer Agreements
Ongoing operational support with priority response and scheduled reviews.
Typical Deliverables
- Completion and intervention design packages
- Engineering calculations and simulations
- Risk assessments and contingency plans
- Operational procedures and execution programs
- Daily operational reports and performance tracking
- Post-job analysis and optimization reports
SEO Note
Deepwater well intervention services · Subsea completion engineering · Offshore well completion design · Smart well completion systems · Oilfield engineering services Guyana
Deepwater Engineering in Action
Deepwater Engineering
Subsea Operations
Ready to Get Started?
Partner with Guyana's Deepwater Specialist
Contact Tryall Energy Guyana Inc. to discuss your well completions, interventions, or production optimization requirements. Local presence, global expertise.