XLOT Formation Integrity Post Test

We are planning an exploration well in the Norwegian sea.

To plan for a potential later injector well we require an XLOT at the 9 5/8" shoe above the reservoir.

Concern has been raised over formation integrity of the cap rock formation after performing this XLOT.
- Is the integrity of the rock weakened after performing an XLOT to the point that it could lead to increased risk drilling to TD?
- Is there a risk that the fracture propagates to the reservoir sands and later causes increased losses to TD?
- What is the experience of people performing an XLOT after drilling out the shoe and then drilling through reservoir to TD?

It has been suggested we would be better performing the XLOT during the P&A phase after setting reservoir P&A plugs and dressing off (obviously would take more time). Any experience with this?

Thanks,
Mikaela

6 Answer(s)

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