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Email: info@otkltd.com

Tel: 234 (0) 8093563356, +234(0) 8060156326
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Our Projects

Project Title: Meji GGCP Debottlenecking Project

Client: Chevron Nigeria Limited
Location: Lagos, Nigeria.

Project Status: Ongoing.

Flare Dispersion Study

The Flare Dispersion Study will assess the potential un-ignited flammable gas impact on manned areas and equipment from the HP and LP flare release on Meji GGCP and also to assess the potential un-ignited flammable gas impact on manned areas and equipment from surge vessel vent in the event of a PSV lift on the HP separator

  • Confirm the height and location of Flare is sufficient to prevent high levels of radiant heat from impacting on process equipment and areas where personnel may be present;
  • Ensure that in case of flare flame-out scenario and un-ignited gas dispersion, the height and location of the flare is sufficient to prevent plume from impacting on process equipment and ignition sources;
  • Recommend additional protection where results show that flare radiant heat levels exceed the specified limitations, or dispersed clouds have the potential to impinge on ignition sources;
  • Determine the potential temperature rise of certain receptor of interest
  • Determine a temperature profile of flare stack during flaring to assess the benefits of different material coatings for the flare boom
  • Design Safety Case Report

    The design safety case will demonstrate that the risks and hazards inherent in the facility have been identified and there are processes in place to reduce these risks and hazards to ALARP. Considering project design documents and studies, the design safety case report will include but not limited to the following: HAZOP, HAZID, BOW-TIE, etc.

    Project Title: Olu Tee Hazardous Waste Landfill Project at Aladja

    Client: Olutee Engineering in Conjunction with Chevron Nigeria Ltd
    Location: Warri, Nigeria.

    Project Status: Completed.

    OTK facilitated the HAZOP study for Aladja Hazardous Waste Landfill Design with its entire associated infrastructure including and not limited to: leachate management system, site storm water management system, access road and truck parking, weighbridge, and all other sundry items as agreed with the client.

    Project Title:Fire and Gas Detector System

    Client: Lonestar Drilling Nigeria Ltd
    Location: Port Harcourt, Nigeria.

    Project Status: Ongoing.

    Installation of notifies system 57 Panel, Gas detectors, Cabling, Calibration and commissioning of the gas alarm system.

    Project Title:Tank Farm Expansion Project

    Client: Midwestern Oil and Gas Limited
    Location: Lagos, Nigeria.

    Project Status: Complete.

    Otormeking Engineering was commissioned to HAZOP on two (2) new 40,000 Barrels crude Storage Tank. HAZOP Study is to identify the hazards inherent in the operations of the new storage tanks in order to meet its design objectives.

    Project Title:Izombe Flow station Fire & Gas Assessment Study

    Client: Addax Petroleum Development (Nigeria) limited
    Location: Lagos, Nigeria.

    Project Status: Ongoing.

  • Install Flame Detectors as indicated on the Fire Protection System Layout. Open path detector coverage HP, LP and Gas lift Separators are considered critical.
  • Review Izombe Flow station equipment and piping layout against the developed Hazardous Area Classification Drawing:
  • Consider increasing the spacing between the HP and LP Separators to satisfy minimum separation distance requirements.
  • Consider fire-proofing the structural legs of the pipe racks in the vicinity of Gas Scrubbers and Gas Pig Receiver. This would prolong the resistance time to fire radiation and retain structural integrity.
  • Project Title: Assah North- Ohaji South

    Client: Shell Petroleum Development Company
    Location: Lagos, Nigeria.

    Project Status: Complete.

    OTK was commissioned to provide facilitator for Ohaji South HAZOP. The main objective of the HAZOP to study the Process Deviations impact on the Coarse HAZOPs conducted during Concept Phase.
    The study scope is limited to changes in process design from Concept Phase to Pre-FEED Phase, comparing the PFSs developed in both phases to assess the impact of changes from Hazards and Operability perspective.
    The major deviations at high level in the Pre-FEED phase compared to the concept stage include the following:

  • For the well products before the separators, the HIPPS systems are excluded.
  • For the Condensate after the condensate coalescer, the settling tank has been removed.
  • No water is expected at the Stabilized Condensate Storage tanks.
  • Some other minor deviations that may be noticed during the review. 
  • Project Title: EGINA FPSO

    Client: Total Upstream Nigeria
    Location: Lagos, Nigeria.

    Project Status: Complete.

    OTK was commissioned to describe the systems, equipment and procedures necessary to protect against the major hazards which could lead to injury of personnel, damage to facilities, loss of production or pollution of the environment, and to prescribe the safety measures which are adopted in the design in order to:

  • Avoid exposure of personnel  to potential hazards
  • Minimise the potential for hazardous occurrences (release of liquid hydrocarbons, flammable gases and any other hazardous events).
  • Minimise/control the risk of ignition
  • Contain and minimise the consequences (fire, explosion and pollution) of the hazards
  • Provide means of escape and evacuation from such hazards
  • Ensure the installation is designed to a safe standard
  • Project Title: H2S Gas Dispersion Study

    Client: Exxon Mobile
    Location: Lagos, Nigeria.

    Project Status: Complete.

    OTK was commissioned to carry out a high-level H2S gas dispersion analysis in the equipment/location for fixed H2S gas detectors of the Erha FPSO.  The purpose of this study is to provide detailed understanding of the potential consequences of H2S during a major hazardous event (worst case scenario) on the Erha FPSO facility.
    The findings of the assessment will offer, in an advisory capacity, a high-level, qualitative determination of H2S gas dispersion which can be used, in conjunction with a full risk and safety assessment to establish confidence in the operation of Erha FPSO facility and the safety to its personnel
    The DNV dispersion software PHAST will be used for the study. The scope of work will include:
    Review and process the pertinent information regarding:

  • Meteorological conditions of the Erha FPSO;
  • Gas compositions in equipment’s/locations;
  • Set-up and run selected gas dispersion simulations based on the appropriate selection of conditions
  • Prepare and deliver technical note detailing the analysis including detail on methodology, technical approach, assumptions and results. The results will contain data of gas plume dispersion and concentration.
  • Project Title: Bridge Linked Platform

    Client: BG Group
    Location: UK North Sea.

    Project Status: Complete.

    OTK was commissioned to provide expertise in reviewing the FEED Contractor's work and defining requirements for subsequent EPC tenders. OTK provided client with direct working knowledge of the UK Regulatory framework which was essential in engaging the UK Regulator and developing the necessary submission requirements. OTK continues to provide the client with dedicated support in the areas below.

  • Safety and Risk Studies, including Quantitative Risk Assessment of the offshore assets to identify all hazards and assess the risks to personnel. OTK used the QRA output to complete further assessments of the Dropped objects Risks on the assets.
  • OTK managed the detailed hydrocarbon release and explosion analysis using Computational Fluid Dynamics (CFD) software. This assessment determined the probability of exceeding a structural design loading allowing the design to be accurately specified. OTK also conducted studies to review the provision of Sub-Sea Isolation Valves to the main sea lines.
  • OTK, on behalf of client prepared the draft submissions of the primary UK Regulators: Design Notification (Offshore Safety Case Regulations)
  • Project Title: Debottlenecking of FCC and Catalytic Polymerisation units

    Client: Preemraf Lysekil Refinery
    Location: Sweden.

    Project Status: Complete.

    OTK was approached to perform detailed design HAZOP. The purpose of HAZOP study was to systematically review the process and operation of the proposed modifications and replacement of equipment in the FCC and Catalytic Polymerisation units in order to identify the potential hazards and operability problems. OTK reviewed the adequacy of the protective measures and proposed solutions or identify areas for further study. Each modified / replaced equipment of the installation was given line-by-line or stage-by-stage examination by the HAZOP team. This was done by using a set of guidewords in combination with system parameters to give meaningful deviations from the design intent.  The team concentrates on those deviations that could lead to potential hazards to safety, health or the environment. In addition, the team also searched for potential operating problems.

    Project Title: BG Everest East Expansion

    Client: BG Group
    Location: UK North Sea.

    Project Status: Complete.

    OTK undertook the HAZOP using a structured approach according to established
    Amec HAZOP techniques. This involved identifying and assessing potential hazards associated with the proposed modifications by applying primary and secondary guidewords to associated modes of operation and ensuring that suitable risk reduction measures are in place to manage identified risks.

    Project Title: Sub Sea Tie-back

    Client: Canadian Natural Resources
    Location: UK North Sea.

    Project Status: Complete.

    OTK was commissioned to undertake Detailed Design Study and investigate the extent of modifications required, constructability issues, structural impacts, SIMOPS issues and regulatory requirements associated with the proposed Subsea tie-back Field which necessitates modifications and additions to the existing equipment.
    As part of its hazard management process, validation of the previous safety studies will be carry out by OTK technical safety team. The basis of the Detailed Design scope is the FEED report, assumptions and conclusions prepared and issued by another contractor. This has been expanded upon through the addition of Sstructure recommendations.

    Project Title: Deluge Requirement

    Client; BG Group
    Location: UK North Sea.

    Project Status: Complete.

    OTK Safety team will address the deluge system/requirement in the detailed design. This was deemed not required at the FEED stage of the design. The deluge system shall provide adequate coverage for the relevant fire and explosion scenarios, with respect to both volume and area coverage, horizontal and vertical surfaces. It may be regarded as a fire area and may be covered by several deluge valves. All deluge valves covering the fire area shall be released when fire is detected anywhere in the fire area. This applies also for manual release of any deluge valve covering the fire area. The Fire Water system shall be designed and calibrated such that deluge nozzles will receive water at design pressure not later than 30 s after a confirmed fire signal has been given.

    Project Title: Explosion and Blast Analysis

    Client: BG Group
    Location: UK North Sea.

    Project Status: Complete

    OTK will provide risk assessment regarding the ignition of flammable gas cloud in case of gas leak from production risers. OTK will use Computational Fluid Dynamics (CFD) to simulate different leak scenarios to predict the overpressure due to gas explosion and perform a fire analysis. An explosion analysis will provide protection strategy with the objective of minimizing the explosion risk through the following:

  • Preventing explosions to occur
  • Minimizing the explosion pressure.
  • Controlling the consequences of explosions
  • Project Title: Fire Risk Analysis (FRA)

    Client; BG Group
    Location: UK North Sea.

    Project Status: Complete

    OTK was approached to conduct Fire Risk Analysis. FRA identifies potential fire hazards (i.e. jet fire, spray fire or pool fire) and quantifies the extent of potential consequences.  Active and passive fire protection shall be arranged to ensure that a fire is prevented from spreading to other areas within a specified period of time and to protect load carrying structure against critical heat loads. For Major Hazards like riser fires or burning blow outs, the required time period before impairment shall be defined. Shielding of escape-routes and evacuation stations shall be as required to ensure escape from all areas and evacuation from the installation. The fire loads to be considered within an area may be limited through location of ESD or PSD valves.