Pre-Grant Publication Number: 20090076873
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Prior Art Detail
Summary / Description
| Summary / Description | An article describing a software application that monitors a well and evaluates risk in real time. |
Basic Information
| Type of Prior Art | Online Publication |
| URL | http://public.slb.com/media/ser... |
| Author/Creator | Daniel Bourgeois, Ian Tribe, Rod Christensen, Peter Durbin, Sujit Kumar, Grant Skinner, Drew Wharton |
| Title | Improving Well Placement with Modeling While Drilling |
| Publication Date | January 1, 2006 |
| Publisher | Schlumberger |
| Directions to Document Location | |
| Additional Information | |
Notes / To Do
| Notes | The caption under the diagram on page 26 seems to describe exactly what is claimed in this application. |
Excerpt
Excerpt Saving time and money while reducing risk. Osprey Risk interactive software was
designed to assist asset teams with well planning by providing probabilistic cost, time
and risk assessment while incorporating geological and geomechanical models into
the process. With subsurface targets identified, the well trajectory is designed in the
Petrel Well Design tool (top) and input into Osprey software as a deviation survey.
Earth-model data—at a minimum, pore pressures, fracture gradients and unconfined
compressive strengths from the Petrel MEM—are also required input. The software
proposes optimal hole size, bit type, maximum mud weights, and casing sizes, weights
and set depths, taking into account production requirements, wellbore stability and
many other factors. Using the available data and Monte Carlo simulation, drilling times
and costs are calculated at key depths for a set of defined probabilities (bottom). This
output can be used as a working operational plan. Significant drilling risks for the
technical design are generated and can be displayed individually or grouped into
categories of fluid gains, mud losses, stuck pipe and mechanical problems. A total risk
index is also computed and can be used to rank scenarios. In the risk display, dark
green indicates low risk, light green shows low to medium risk, yellow means medium
risk, orange indicates medium to high risk and red shows high risk. Osprey Risk and its
plug-in are fast-responding applications so that drilling engineers and geoscientists
can easily change the design and compare results within minutes. This process leads
to reduction of technical risk and highlights where mitigation strategies will be needed
to implement the operational plan.
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Relevance
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