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The upstream, or exploration and production, sector of the oil and gas industry deals with the drilling and operation of wells that bring oil and/or gas to the surface. But oil and gas are not all that is produced. Other impurities such as Emulsions, water soluble organics (WSOs), sand, water and other items are also produced and must be extracted by the process equipment before being sent to the refineries. Chemicals are also used to improve process equipment efficiency. Everything must work in sync in order to achieve the best possible product.

GATE, VIKING and GPS have extensive knowledge when it comes to the upstream sector. After all, it's where we made our start.

We are constantly improving our processes and adding essential services to be able deliver the best solution to our Clients. We take on projects at any stage from design of new developments to troubleshooting of mature fields.

Exploration & Drilling

Exploration and drilling is VIKING's main area of expertise. Coupled with GATE's expertise in Flow Assurance and Operations Readiness, we offer services that combine these areas to provide a systems approach to well engineering.

Rig Readiness

  • Project Management
  • Project Delivery Team including Engineering & Commissioning Team Members
  • GATE Completion System (GCS) to Track & Record Progress Throughout Reactivation
  • Sea Trials to Ensure that the Asset is Operationally Ready

Multi-string Analysis

  • Annular Pressure Build-up (APB) Analysis to verify thermal-hydraulic performance of the wells not only during steady-state but during transient operations
  • Evaluation of APB Mitigation Techniques
  • Producing Operating Envelopes
  • Definition of Stuck Points & Anchor Points
  • Balance of Forces During Thermal Events
  • Net Forces & Movement at Surface (Wellhead Movement)

Comprehensive Annulus Pressure Management

The GATE Flow Assurance and Operations Readiness Team along with VIKING Engineering has joined forces to merge the mechanical and dynamic thermal-hydraulic aspects to bring a holistic approach to annulus pressure management. By combining these two aspects of well design and integrity management, we offer more robust:

  • Annular Pressure Buildup Evaluations
  • Annulus Pressure Management Guidelines
  • Thermal Well Modeling

Well Material Selection

  • Producing Environment Assessment
  • Matching Tubulars to Production
  • Material Selection for HPHT Well Designs
  • Downhole Inhibition Recommendations
  • Corrosion Resistant Alloy Recommendations
  • Sour Service Evaluation and Testing
  • Wellhead Material Evaluation
  • Determine Level of Erosion Risks & Associated Stresses Involved with certain Well Operations such as Gas Lifting via Coil Tubing

Well Construction

  • Well Planning and Configuration for Onshore, GOM, Deepwater and International projects
  • Casing and Tubing Design and Analysis including HPHT, Deep, Sour Wells
  • Connection recommendations
  • Equipment Specifications
  • Matching Equipment to the Production Plans
  • Detailed Tubular & Wellhead Specifications
  • Procurement Solutions & Specifications
  • Tubular Inspection a& Running Practices

Well Clean-out & Well Intervention

  • Well unloading & flowback support
  • Chemical selection for well stimulation
  • Flow assurance support during flowback & stimulation operations

Spill Response & Source Control

  • Planning & execution of well incident response
  • Worst Case discharge Analysis & WCST
  • WCST Level-3 (Cap and Flow) Operational Flow Assurance
  • Well control & Relief Well Kill simulation
  • Thermal Modeling using OLGA and/or Wellcat Tools
  • Chemical Injection / dosage requirements
  • Annular Pressure build-Up analysis & Mitigation

QA/TPI Surveillance

  • Project Quality Management
  • Project Quality Coordination
  • Administrative Staff
  • Auditing - ISO 9001 or API Q1, 9th edition
  • Technical Writing including specifications, procedures & guidelines
  • QA/QC Plans
  • Inspection Test Plans
  • Failure Investigation
  • Expediting
  • Material Logistics & Inventory Control
  • Rig Site OCTG Running & Installation Evaluations
  • Third Party Inspection including Mill Surveillance, Post Mill Inspection, Threading, & Vendor Surveillance

Specialized QA Services

  • Subsurface / Surface Wellbore Equipment
  • Wellhead & Christmas Trees
  • Production Tubing String
  • Flow Nipples, Collars & Pup Joints
  • Chemical Injection & Pressure / Temperature Mandrels
  • Gas Lift Mandrels
  • Packers
  • Isolation Valves
  • Perforating Equipment
  • SCSSV’s
  • Screen & Blank Assemblies
  • Rental / Running Tool Equipment - Subsea Tools, Brushes, Scrapers, etc

Wellbore Equipment QA Services

  • Oil Country Tubular Goods (OCTG’s) - Casing, Tubing, Couplings, Pup Joints, Accessories
  • Drill Pipe / Drill Collars - Pipe, Tool Joints, Collars
  • Line Pipe - Transmission Lines, Gathering Lines
  • Accessories - X-Overs, Hangers

Failure Investigation of Wells

  • Downhole Force Analysis
  • Assessment of Field Conditions Leading to Failure
  • Multi/Discipline Approach for Determining Failure Modes
  • Material & Stress Analysis
  • Metallurgical Analysis & Testing
  • Interface with Manufacturers <
  • Wellsite Installation per Industry Best Practice
  • Recommendations for Future Practices

Production & Reservoir Engineering

  • Fluid Characterization (Oil, Gas, and Water), PVT Analysis
  • Well Completions Requirements
  • Field Architecture Selection
  • Well Configurations & Optimization
  • Well Allocation & Production Optimization

Design & Engineering

Projects are complex, especially deepwater projects. Multiple teams in multiple locations must come together to provide a functioning asset that can meet the demand. 

At this stage, it's all about coordination. Failure to do so results in flawed designs, facilities that are hard to operate, cost overruns and strained relationships. But with our systems approach, we aim to ease these side effects and provide expertise to facility designs that will, in the end, create reliable assets. 

Production and Reservoir Engineering

  • Fluid Characterization (Oil, Gas, and Water), PVT Analysis
  • Well Completions Requirements
  • Field Architecture Selection
  • Well Configurations and Optimization
  • Well Allocation and Production Optimization

Process Design

  • Basis of Design Development
  • Operation Flow Assurance
  • Production Chemistry
  • Interface Management
  • Complexity Studies
  • System Studies
  • Operability Reviews
  • Materials Selection including Protective Coatings, Cathodic Protection Systems, Corrosion Monitoring, and Erosion Monitoring Systems
  • Topsides Requirements based on Transient Flow Modeling and Production Chemistry
  • Control Systems, Control System HMI Screen Development
  • Process Hazard Analysis (HAZID, HAZOP, SIL, LOPA)
  • Peer Review

Complexity Studies, System Studies and Operability Reviews

  • Project Visualization, Conceptualization & Definition (VCD) Flow Assurance and Operability Studies
  • System Integrity Management (Water Hammer, HIPPS Analysis, Leaks, Corrosion, Erosion, Scale & Sour Modeling)
  • Flow Assruance risk assessment and mitigation strategies
  • Hydrate, Wax, Asphaltene, Sand and Other Solids Deposition Management
  • Deliverability, Operability, Startup, Shutdown, blowdown and Slugging Studies
  • Water Hammer and Pigging Studies
  • Line Sizing and Thermohydraulics Studies
  • Liquid management and slug catcher sizing

Process Modeling and Analysis

  • Rigorous Choke Modeling, choke sizing and selection support
  • Multiphase Flow Modeling (Steady-State and Transient Modeling of Operations)
  • Corrosion Modeling, Erosion Modeling, Scale Modeling
  • Reservoir Souring Modeling and H2S Partitioning in Production System
  • Shut-In, Startup, Restart, Ramp-Up/Down, Gas Lift
  • Fluid PVT Analysis and Characterization (PVTsim and Multiflash)
  • Integrated Modeling (OLGA and HYSYS integration)

Chemical Injection System Design

  • Chemical Injection System Design Review
  • Chemical Injection System Commissioning, Startup, and Operating Procedures
  • Subsea and Topsides Flow Control Valve Qualification and Selection
  • Flow Assurance, Chemical Technology, Production Chemistry Interface Management
  • Process Hazard Analysis (HAZID, HAZOP, SIL, LOPA)

Subsea System Design

  • Subsea Materials Selection and Qualification
  • Erosion/Corrosion Risk Assessment and Modeling Scaling Studies (Formation Risk, Removal and Mitigation Strategies)
  • Protective Coatings and Cathodic Protection System Design, Monitoring and Inspection Strategies
  • Subsea Modeling:
    • Rigorous Choke Modeling
    • Umbilical Axial Mixing and Pressure Drop Modeling
  • Pigging Solutions for Deepwater Production Flowlines and Risers
  • Development and oversight of risk‐based inspection (RBI) programs and the detailed selection of appropriate condition monitoring points and surveillance locations
  • Subsea Construction Management
  • Subsea Distribution and Controls
  • Subsea Integrity Management Planning
  • Process Hazard Analysis (HAZID, HAZOP, SIL, LOPA)

Water Injection System Design

  • Material Selection
  • Water Injection System Modeling:
    • Souring, Scaling and Corrosion Reservoir Souring Predictions with the use of Modeling
    • Integrated Flow Modeling and Water Injector Performance, Water Hammer Analysis
  • Process Hazard Analysis (HAZID, HAZOP, SIL, LOPA)

Vendor Qualification

  • Material Vendor Qualification including Welding, Coating, Anode Chemistry, Positive Material Identification
  • Chemical Vendor Qualification and Selection
    • Screening for Effective Vendor Evaluations
    • Development of Chemical Qualification Testing Plan and Acceptance Criteria

Construction, Installation & Commissioning

Our one-of-a-kind commissioning team brings the systems approach mindset to the table. Effective planning is imperative in order to achieve first production in the safest and fastest way possible.

Construction & Fabrication

  • Onshore and Offshore Client Representation
  • Management of Field-based Construction Activities including Safety, Logistics, Material Handling Requirements, Contractors, etc.
  • Supervise and Coordinate Equipment Testing, including FATs, EFATs and SITs
  • Providing input during detailed design, as it pertains to the specification and manufacturing of equipment, in order to reduce construction complexity, cost and time.
  • Managing Interfaces with Other Disciplines
  • Provide Drafting Support including Fabrication Drawings
  • Inspection and Auditing During Fabrication And Vendor Qualification including Welding, Coating, Anode Chemistry, Positive Material Identification

Installation and Hook-up

  • Specify & Provide Oversight to Equipment Transportation, Load-out and Sea-fastening onto Installation Vessels
  • Systems Completion Planning, Databases and Dossiers
  • Interface and SIMOPS Management
  • Startup and Steady State Support
  • Design reviews Hook-Up / Commissioning Studies
  • Oversee the Installation of various subsea equipment including:
    • Topside Control Systems
    • Master Control Systems (MCS)
    • Human-Machine Interfaces (HMI)
    • Electrical Power Units (EPU) and Hydraulic Power Units (HPU)
    • Subsea Control Modules (SCM) interface with trees, external sensors, multiphase flow meters (MPFM), venturi flow meters, new well tie-ins, and umbilical design.
    • Subsea Distribution Assemblies (SDU) and Umbilical Termination Assemblies (UTA), Flying Lead Installation (HFL, SFL, EFL, OFL), PLET, PLEM, Jumper, Manifold, Tendons and Pipelines
    • Flowline Pull-in’s
  • Installations and Activities involving Diving Operations
  • Pre-lay Route Monitoring and Pipe-lay Monitoring as Company Representative
  • Installation, Hook-up, and Commissioning Representation and Management

ROV Operations

  • Providing Input for ROV interfaces
  • Generating and/or Reviewing of Procedures
  • ROV Sizing and Tooling Recommendations
  • Umbilical and Jumper Installation
  • SCM and Choke Insert Replacement
  • Jumper Metrology
  • Flying Lead Installation (HFL, SFL, EFL, OFL)

Planning and Commissioning Management

  • Mechanical Completion, Commissioning (Static and Dynamic) and Startup Planning and Execution
  • Full Service Execution / Client Representative Oversight
  • Budget, POB Forecasting & Schedule Development
  • Procedure Development
  • Systems Completion Management via the GATE Completion System (GCS)
  • Permit To Work and Isolation Management System
  • Quality Assurance / Quality Control
  • Extensive Upstream Oil and Gas Commissioning Experience
  • Preservation Management
  • Vendor Management

Regulatory Commissioning

  • Procedure Development
  • Regulatory Testing
  • Interface Management

Mechanical Commissioning

  • Rotating Equipment
  • High Pressure Leak Testing
  • Piping and Tubing Inspection / Cleaning and Flushing

Electrical Commissioning

  • Power Generation
  • Switchgear and Distribution

Instrumentation Commissioning

  • Calibration and Integration Testing
  • Cause and Effect Testing
  • Telecom

Operations Readiness & Initial Startup

Preparing for operation of a major oil and gas facility is a daunting task. Prior to first oil we need standard operating procedures, maintenance procedures, spare parts and trained operators, just to name a few. Our Operations Readiness team works to make sure the Operations Team has everything they need when it comes to operating the facility before initial startup. 

However, Operations Readiness efforts frequently start too late and are frequently inadequately resourced. Operations Readiness systems developed late in a project and in silos can’t reach the potential of becoming the powerful tools that they were intended to be. By shifting our Operations Readiness mindset and processes towards a systems approach, we have developed effective, easy-to-use tools and streamlined processes for improved facility startups and operation.

Reviews

  • P&ID Review
  • Process Hazard Analysis (HAZID, HAZOP, SIL, LOPA) via Novel Methods
  • Operability Reviews
  • SEMS Readiness Reviews
  • Pre-Startup Safety Reviews (PSSRs)

Operations Planning

  • Operating Philosophy/Guidelines
  • Standard Operating Procedures (SOPs)
  • Innovative Operator Training (Scenario Games, Tactical Decision Games)

Maintenance Planning

  • Equipment Criticality Ranking
  • Maintenance Planning (CMMS, Spares) for Topsides and Subsea equipment
  • Spare Parts Data Development
  • Reliability Centered Maintenance (RCM) Studies
  • Failure Mode Effect Analysis (FMEA) Studies

Initial Startup

  • Initial Startup Planning and Procedures
  • Offshore Startup Management
  • Control System Tuning (Based on First Principles – Not Short Cut Methods)

Operations & Troubleshooting

Once initial startup is over, its time to make sure the facilities are running smoothly. We take on challenging facility problems and issues, plan, manage and execute various IMR activities and can make sure your facility is optimized for increased uptime and whole life value of the asset.

Environmental Management & Engineering

  • LDAR (Leak Detection & Repair) Field Services
  • Well Site Leaks Monitoring Plans
  • Emission Control Programs
  • Database Management

Inspection, Maintenance & Repair

  • Asset Integrity Management Inclusive of Inspection, Maintenance and Repair (IMR) Planning, Execution and Management for Brownfield and Greenfield Developments
  • Risk Based Assessment and Inspection Planning - Development and oversight of risk‐based inspection (RBI) programs and the detailed selection of appropriate condition monitoring points and surveillance locations.
  • Floating host In Service Inspection Planning (ISIP) and Underwater Inspection in Lieu of Dry-docking Inspections (UWILD)
  • Offshore Underwater Platform Inspection and Repair for Regulatory Requirements and Asset Life Extension
  • Facility Audits
  • Audits of Anode Foundries and Coating Plants, Qualification of OCTG and Forging Manufacturing Processes
  • Periodic HAZOPs

Subsea Inspection & Intervention

  • Manage Intervention Campaigns
  • Maintenance & Repair (IMR) Utilizing Both ROV’s and Manned Diving Operations
  • Wet Welding Repair Projects
  • Manage Subsea Equipment Refurbishments
  • Spare Parts, Tooling and Equipment Recommendation for Maintenance, Repairs and Interventions

Optimization & Troubleshooting

  • Operator Assistance Tools (Real Time Hydraulic Profiling, Liquid Management, etc.)
  • Process System Optimization
  • Control System Tuning (Based on First Principles – Not Short Cut Methods)
  • Chemical Management Plans and Optimization Programs
  • Chemical Injection System Troubleshooting an Process Optimization
  • Management and mitigation of Carbon Dioxide (CO2), Hydrogen Sulfide (H2S) and microbiologically induced corrosion (MIC) modeling and failure mechanisms.
  • Risk-Based Assessment and Inspection Planning Troubleshooting Corrosion Problems on Operating Facilities
  • System Remediation Assistance (Hydrate Blockage, Wax Buildup, etc.)
  • Multiphase Flow Modeling (Steady-State and Transient Modeling of Operations)
    • Hydrate Wax Buildup and/or Asphaltene Remediation
    • Restart, Ramp-Up/Down, Gas Lift
    • Water Hammer and Pigging Studies
  • Water Injection Troubleshooting
  • Debottlenecking, Performance Testing of Water Injection Systems

Blockage Remediation

  • Chemical Injection System Troubleshooting an Process Optimization
  • System Remediation Assistance (Hydrate Blockage, Wax Buildup, etc.)
  • Multiphase Flow Modeling (Steady-State and Transient Modeling of Operations)
    • Hydrate Wax Buildup and/or Asphaltene Remediation
    • Restart, Ramp-Up/Down, Gas Lift
    • Water Hammer and Pigging Studies

Brownfield Installation

PLET, PLEM, Jumper, Flying Lead, Manifold and Pipeline Installations, Flowline Pull-In’s Tendon Installations and activities involving Diving Operations.

Decommissioning & Abandonment

Decommissioning and abandonment practices are critical for the protection of the environment. Planning for the disposal of equipment, sealing of the well safely, and recycle and reuse purposes must be performed within the regulation authority.

With the expertise of VIKING Engineering and GATE's own marine services team, the proper planning and disposal of these assets can be achieved. 

Read further to see how we achieve a systems approach to the decommissioning and abandonment stage.

Planning and Management

  • Topsides and Substructure Decommissioning
  • Subsea Infrastructure and Pipeline Decommissioning
  • Reuse, Recycle, Disposal Planning
  • Provide Abandonment Options
  • Plug and Abandonment Plans, Procedures
  • BSEE Plug and Abandonment Certifications
  • Permitting
  • Expertise in the Corps of Engineers Rigs to Reef Program
  • Contractor Bid Preparation / Analysis
  • Provide Offshore Quality Control of Contractor Activities
  • Assist in Project Planning, Development and Coordination of Removal Procedures
  • Perform Cost Estimating on Asset Retirement Obligations for Shallow Water and Deepwater Installation

Oversight

  • Plug and Abandonment Field Oversight
  • Provide Offshore Quality Control of Contractor Activities
  • Monitor Contractor Safety
  • Provide Daily Cost Accounting & Reporting

decommissioning and abandonment
decommissioning and abandonment
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Midstream

The midstream sector of the oil and gas industry involves the transportation and storage of oil and gas produced from the upstream facilities.

Our expertise lies with pipeline management including oversight of inspection, maintenance and repair work, tracking of Key Performance Indicators and optimization of pipeline transportation.

The GATE Marine Services team focuses on integrated risk management of barge and oil tanker transportation.

Engineering, Procurement and Construction

  • Pipeline construction and installation planning and oversight
  • ROV operations
  • Operating philosophies and guidelines

Environmental Management & Engineering

  • LDAR (Leak Detection & Repair) Field Services
  • Well Site Leaks Monitoring Plans
  • Emission Control Programs
  • Database Management

Barge and Oil Tanker Transportation

  • Activity Specific, Well Specific and Activity Marine Operating Guidelines (ASOG, WSOG & AMOG), Marine SIMOPs Management
  • Vessel Pre-Hire Inspections

Pipeline Transportation

  • Management of Natural Gas and Oil Pipelines
  • Chemical Injection Optimization Studies
  • Hydrate Mitigation and Remediation Strategies
  • MIC Mitigation and Remediation Strategies
  • Pigging Strategies
  • Chemical Management Plans
  • KPI Development & Tracking
  • Thermal-hydraulic modeling of pipeline networks

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Downstream

The downstream sector of the oil and gas industry refers to the refining, processing and purifying oil or natural gas.

Environmental Management & Engineering

  • LDAR (Leak Detection & Repair) Field Services
  • Emission Control Programs
  • Database Management

Installation and Hook-up

  • Specify & Provide Oversight to Equipment Transportation, Load-out
  • Systems Completion Planning, Databases and Dossiers
  • Interface and SIMOPS Management
  • Startup and Steady State Support
  • Design reviews Hook-Up / Commissioning Studies
  • Oversee the Installation of various subsea equipment including:
    • Control Systems
    • Electrical Power Units (EPU) and Hydraulic Power Units (HPU)
  • Installation, Hook-up, and Commissioning Representation and Management

Planning and Commissioning Management

  • Mechanical Completion, Commissioning (Static and Dynamic) and Startup Planning and Execution
  • Full Service Execution / Client Representative Oversight
  • Budget, POB Forecasting & Schedule Development
  • Procedure Development
  • Systems Completion Management via the GATE Completion System (GCS)
  • Permit To Work and Isolation Management System
  • Quality Assurance / Quality Control
  • Extensive Commissioning Experience
  • Preservation Management
  • Vendor Management

Regulatory Commissioning

  • Procedure Development
  • Regulatory Testing
  • Interface Management

Mechanical Commissioning

  • Rotating Equipment
  • High Pressure Leak Testing
  • Piping and Tubing Inspection / Cleaning and Flushing

Electrical Commissioning

  • Power Generation
  • Switchgear and Distribution

Instrumentation Commissioning

  • Calibration and Integration Testing
  • Cause and Effect Testing
  • Telecom