Cementing in Oil-based Mud

Dear forum members,

I have some challenging tasks to resolve.

We are drilling deep wells on shore, (around 6000m).  Recently, we have been penetrating pay zones with OBM.

Please share your experience cementing in OBM  (cement slurry, density differences, spacer types and volumes).

• How to choose the best slurry for that kind of operations? 
• We are going to use stage collar and run in one step. (TD 7" 5100m). 

Any advices would be much appreciated.

8 Answer(s)

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