Cementing 9-5/8" csg with long rathole below

I'm currently working on a Geothermal land well project in Denmark. The well will TD in 12-1/4" hole but there are two targets, Gassum and Bunter sands. Before committing to 9-5/8" liner they need to evaluate which sand will give the greatest PI for producing water. Once it is determined which formation to produce from the 9-5/8" will be set above the reservoir and a gravel packed sand screen completion run. As such there will be a minimum of a 300m rathole beneath the shoe. I have spoken to a few people and the general consensus seems to be to just go ahead and cement conventionally, perhaps spotted a hi-vis pill first.

Anyone have any experience in doing this.

Regards
Adrian Todd

4 Answer(s)

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