The 1999 SEG Development and Production Forum (11–16 July in Kananaskis, Canada) was intended to be a defining moment in the development of time-lapse measurements for use in reservoir management. As the meeting unfolded, it became clear that the intended defining moment had come and gone and a possibly more portentous, unintended moment was presaged by the meeting. What were these two moments?

When we drew up the call for papers for the 1999 Forum, we felt it was time to push the attendees into evaluating, in economic terms, the benefit (or otherwise) of time-lapse measurements to the oil company...

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