Planning & Engineering
Being prepared means you are ready to implement an effective response at any time.
A continual cycle of reviewing, updating and testing of all elements of preparedness will ensure this.
Worst Case Discharge Modelling
Worst Case Discharge (WCD) is defined as the maximum rate a well will flow.WCD information is used to:
• Develop a pressure and temperature profile along the wellbore which is used for
determining the casing’s design reliability
• Creating an input for computational fluid dynamics (CFD) models that are used for
modelling the land out of a capping stack and plume analysis
• Establish relief well kill requirements
Relief Well Planning
A relief well provides the means to permanently kill the incident well by intersecting and penetrating the existing casing structure of the incident well above the influx zone and performing a Dynamic Well Kill.To ensure that a relief well reaches its target and a Dynamic Well Kill is successfully performed, dedicated planning in the early phase of the source control process is required.
Our partners represent expertise and experience with all aspects of relief well planning and engineering services, including procedures for the use of drilling equipment and offshore drilling units.
Capping Stack Interface Checks
Plans will typically identify what necessary equipment is needed to facilitate successful well capping operations.This could be connection devices, debris removal equipment, flex-joint alignment and restraint tools, capping equipment etc.
Our partners can assist with a full range of services related to capping stack interface checks.
Capping stack landing and soft shut in assessment
A Capping Stack landing and well soft shut-in engineering study is required to ensure that the installation of the Capping Stack is safely performed and that the temporary soft shut-in of the incident well release is conducted without compromising the well structure integrity.Plans include Computational Fluid Dynamics (CFD) modelling to understand uplift forces and erosion simulations during the landing and shut-in operations.
Logistics Execution Plan
Having a robust Logistics Execution Plan (LEP) is an integral piece of a Source Control Emergency Response Plan.”An effective response requires complex, time-critical logistic planning.
In order to mobilise the required assets, equipment supply and mutual aid contracts with specialist organisations must be activated in a timely manner.
OSRL can provide a bespoke individual LEP or as a part of a Source Control Emergency Response Plan (SCERP)
Source Control Emergency Response Plan
The development of a robust Source Control Emergency Response Plan (SCERP) will normally be specific to each company’s Incident Management System.OSRL can provide dedicated SCERP´s for specific locations, regions or incidents. A well prepared SCERP will detail the tasks required to ensure that everything is in place to enable an efficient response.
Drills & Exercises
Once the SCERP is ready, you are able to test it and perform Emergency Response on Paper (EROP) sessions, drills and exercises. OSRL can assist in the design of the scenario, the set-up of the response organisation (including ICS training) and the execution of drills & exercises.
You are ready to respond.
Equipment & Resources
In the unlikely event of an incident, the Global Subsea Response Network is ready to assist and execute accordingly. A wide network of expertise and equipment is part of this network.
Site Survey
A site survey is conducted by ROV to assess the condition of the Incident Well. This survey Operation is performed using equipment of opportunity that can be mobilised to the well location as soon as possible.The survey establishes whether the Incident Well is likely to be in a condition where the Capping Stack can be installed and identifies whether any debris from the blowout will need to be removed.
Debris Clearance
Providing safe access to the incident well by clearing the seabed area in preparation for Capping Stack installation and soft shut in of the well.https://visual360.no/osrl/img/debris-removal.png
BOP Intervention
BOP Intervention is an attempt to close the BOP rams on the incident well BOP by activating the BOP rams remotely via the BOP Intervention kit which is operated by a ROV.https://visual360.no/osrl/concepts/SIRT/intervention
Subsea Dispersant Injection (SSDI)
The primary purpose of the SSDI kit is to inject dispersants directly into the flow path of the incident well plume. This can reduce the amount of volatile hydrocarbons at surface and restore safe working conditions over the wellWater Column Monitoring (WCM)
The WCM equipment allows for monitoring the movement of the suspended hydrocarbons from the incident well and dispersant efficiency by retrieving water samples at various depths of the water column. ,https://visual360.no/osrl/concepts/SIRT/dispersant
Capping Stack
Depending on the incident, a Capping Stack can be installed to get control or stop the flow of hydrocarbons. A wide range of services are available, from shallow water (>700 meters) conditions to ultra-deepwater (>3800 meters) operations.https://visual360.no/osrl/concepts/capping/
Offset Installation Equiment
In the case of an incident in shallow waters, the plume effect from the subsea blowout may prevent vertical access to the incident well.The OIE will enable the operator to safely install the Capping Stack from vessels located outside the exclusion zone and soft shut in the well in a safe manner.
https://visual360.no/osrl/concepts/OIE/oie
Relief Well
A successful Capping Stack installation is only to be considered as a temporary means to halt the release of hydrocarbons to environment. The permanent solution is by drilling a Relief well and performing a Static Well Kill.Containment
If well shut-in is unsuccessful using a Capping Stack due to compromised well structure integrity, the Containment Toolkit can be deployed to create a containment system designed to flow hydrocarbons from a wellhead to the surface in a safe and controlled way, ready for storage or disposal.https://visual360.no/osrl/concepts/containment
Vessel Sourcing
Access to field support vessels to support in a subsea well control incident is key for the operational preparedness. SIMOPS, mission planning and vessel of opportunity tools are available for members.Integrated Response
“No one response organisation can provide a single end-to-end solution.”
The GSRN was put in place to meet the demand from the industry that an effective and aligned approach to Source Control Emergency Response Planning is available on a global scale.The GSRN network represents world-leading expertise from planning to execution – all over the globe. Through OSRL SWIS membership, access is provided to a network of well-established response resources that ensures a turnkey solution to an integrated response, strategically managed by OSRL.
Mutual aid
SWIS Membership provides immediate and pre-approved access to a mutual aid framework agreement for additional personnel resources, and assistance from other participating members.
“Overall, the Operating company needs to own the plan and ensure all assumed interface points are robust.”
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