Dual fluid weights

Dear members

Here's a great thread to get your collective teeth into. From a member who would prefer to remain anonymous:

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Process: when finished drilling horizontal section, we want to circulate out of the hole to the shoe and swap to higher fluid density: need to understand how you could guarantee fluids don’t swap (or if there is a time limit) when there is a light fluid on the bottom of the well and a heavier fluid on top.  

For context, we need to have 8.6 ppg in our horizontal section but 9.6 ppg above.  The 8.6 ppg is needed to ensure the swell packers in our lower completion can swell (they can’t swell in high brine concentration) and the 9.6 ppg is needed to prevent borehole instability.

Your experience would be greatly appreciated.

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Thanks in advance

Dave

6 Answer(s)

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