OLGA®-WELL-KILL

OLGA®-WELL-KILL is a dynamic model for simulating multiphase flow in wells

The model has been specially adapted to calculation of pump rates and mud volumes for a variety of blowout control situations. OLGA®-WELL-KILL has been developed from the state-of-the-art two-phase flow simulator OLGA. It can handle numerous well flow configurations - from a single vertical well to multiple horizontal wells with complex completions. With a fully portable system, assistance with the model is available on-site in a blowout kill planning and control situation.

Unique well kill applications

OLGA®-WELL-KILL has been designed for planning and evaluation of kill scenarios and intervention options. The model can be used to analyze blowout flow, kill point, pumping schedule, casing design, kill fluid properties and volumes, temperature, pressure and other related parameters. The results may be presented versus time for a complete dynamic and volumetric response.

Well kill applications for the model include:

• Dynamic kill simulations for relief well control operations
• Top kill simulations for underground or diverted blowouts from a rig or snubbing unit
• Bull heading analysis
• Momentum kill analysis
• Shallow gas analysis
• Production applications include:
• Production and injection flow characterization
• Horizontal well flow analysis
• Water alternating gas injection analysis

OLGA®-WELL-KILL features that are unique to well kill applications include:

• State-of-the-art multiphase flow technology
• Advanced controller system which is representative of real pumping operations
• High pressure pump models
• Oil and gas properties fully modeled
• Pressure and temperature effects on mud properties
• Non-Newtonian flow
• Well path obstructions and leaks
• Critical flow conditions
• Various models can be used for the reservoir inflow
• User defined graphical presentation

The results from OLGA®-WELL-KILL will typically provide:

• Fully dynamic simulations of the kill operation with pressures, blowout rates, pump rates, cumulative volumes, hydraulic horse power requirements and temperatures. Parameters can be displayed versus time at any point in the well(s).
• Calculation of necessary kill fluid rates, time and volumes to obtain dynamic and static kill.
• Sensitivity analysis of different kill fluids; water, brine or mud with different densities and viscosities.

Background, development and experience

The development of OLGA® started at IFE in 1980. A major research program, in cooperation with SINTEF and sponsored by a group of large oil companies, has resulted in an industry standard dynamic two-phase code used world wide by most operators for multiphase flow design.

After experience from a North Sea blowout in 1989, Institute for Energy Technology (IFE) sponsored by Saga Petroleum, developed a multiphase dynamic flow simulator for well kill planning. The simulator, named OLGA®-WELL-KILL, was based on the dynamic two-phase flow simulator OLGA® and later further developed through an R & D program. An agreement with IFE and SINTEF gives add wellflow as the rights to offer this extremely powerful tool as a service to oil companies and operators world wide.

Research and development work on improving the simulator continues. Research is carried out in the areas of fundamental multiphase flow behavior, as well as application specific code development and integration with other software packages.
The simulator is extensively used to analyze hydraulic kill scenarios in relief well contingency planning. These plans are important for the application specific development process, as real situations are analyzed on a regular basis.

Developed by add wellflow as. OLGA®-Well-Kill (powered by OLGA® from SPT group)

Other software developed by add wellflow as: WellFlow, Mudtable, Kick, MudDP, POSVEM, WCDGas.

If you would like to know more about this solution and what value it could mean to you and your company, please call Morten Haug Emilsen in add energy on telephone +47 66 98 32 90 or via Morten Haug Emilsen.