Using gilsonite as a fluid loss control additive

We are drilling Forties reservoir in the Montrose field using oil
base mud and are reviewing the pro's and con's of using gilsonite as
a fluid loss control additive. A liner will be cemented and
perforated after drilling is competed. Our understanding is that a
number of operators in the North Sea are specifying gilsonite-free
mud for drilling reservoir intervals and we would like to gain an
understanding of the reasons behind such requirements to help inform
our decision making. Any input from SPREAD members would be
greatfully received.
2 Answer(s)

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