On the Sep 1 2011, Halliburton filed a claim against BP for "for negligent misrepresentation, business disparagement and defamation" according to this press release on Halliburton's website.

The remarkably short release goes on to say that

"Halliburton has learned that BP provided Halliburton inaccurate information about the actual location of hydrocarbon zones in the Macondo well. The actual location of the hydrocarbon zones is critical information required prior to performing cementing services and is necessary to achieve desired cement placement."

and

Halliburton remains confident that all the work it performed with respect to the Macondo well was completed in accordance with BP’s specifications for its well construction plan and instructions, and that Halliburton is fully indemnified under the contract. 

What is Halliburton's case?

To me, Halliburton's case seems to be:

  1. BP knew where the hydrocarbon zones were
  2. They didn't tell us
  3. We went ahead and cemented based only on what BP told us
  4. Because we did exactly what we were told (and asked no questions) we're in the clear
  5. We're really miffed they told everyone we might have screwed up - and that's defamation in  our book.

Who knew where the hydrocarbon zones were?

Which all seems a bit odd. Because by the time the cementing job came around, I'd imagine that the actual location of hydrocarbon zones in the Macondo well would have been known (to within a metre or so) by:

  1. the BP Petroleum Engineer
  2. the Well Engineer
  3. the Company Man;
  4. the Offshore Installation Manager;
  5. the mudlogging crew;
  6. the wireline crew;
  7. the Logging-Whilst-Drilling crew;
  8. the casing crew;
  9. the driller (and one or two vaguely-interested roughnecks);
  10. Anyone given a three-minute squint at any form of electric log; and

well, I'm tempted to add cementing crew to my list, but Halliburton's lawsuit makes it clear that wasn't the case.

So, how come Halliburton didn't know?

Based on Halliburton's claim; the first possibility is that they went ahead and designed and ran a cement job without any information about the actual location of hydrocarbon zones at all. In other words, they simply followed a BP-designed programme, no questions asked. But that possibility is just so outlandishly mad and unlikely that I'll dismiss it straight away - companies like Halliburton are paid for their expertise, not simply for machine-hours and slurry.

So the second possibility is that BP provided the wrong depths. Well, OK, if…

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