A-Annulus Operating Envelope (AOE)™
A-Annulus Operating Envelope (AOE)™
The Viking team merges the mechanical and dynamic thermal-hydraulic aspects to bring a true systems 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
A-ANNULUS OPERATING ENVELOPE (AOE)™
Viking's Well Annulus Operating Windows
Viking Engineering has developed a methodology in which all elements of a well are considered in order to establish an acceptable operating window to be utilized by the owner/operator of the well. This is specific for offshore subsea wells in which the only measurement points for pressure are in the tubing where the hydrocarbons flow (i.e. flowing wellhead pressure) and the ‘A-annulus’ pressure which measures the pressure in the first outer annulus of the well closest to the production tubing. The output using this proprietary methodology/process results in a simple operating envelop which can then be used to safely operate the well.
ANNULUS PRESSURE MANAGEMENT GUIDELINES
Initial Well Ramp-up & Initial Startup Planning Optimization
By linking Viking's well operating envelopes with the initial startup flow assurance modeling, we can anticipate well shut-in requirements for annular pressure management operations during the initial startup phase. This then allows for more robust development of initial startup plans and procedures by GATE Energy, taking into account flow assurance risks and mitigation plans.
THERMAL WELL MODELING
Precision in Determining Flowing Wellhead Temperatures
Viking software tools such as WellCat®, that incorporates all components of the well, linked with GATE transient thermal-hydraulic models, such as OLGA® and GATE Prho™, allows us to optimize heat transfer calculations from the sandface to the wellhead. We can then predict and verify thermal-hydraulic performance of the wells being investigated not only during steady-state, but during transient operations (i.e. Initial Well Ramp-up, Well Shutdowns, etc.).
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