The advent of new technology - mainly horizontal drilling and 3D and 4D seismic has led to a justifiable expectation of higher recovery factors over the years.

I'm curious as to why these technologies have not turned around the Texas and North Sea declines.

BTW, a question I have been meaning to ask you. Were there ever any material restrictions on drilling in the North Sea?

Because these fields have been grossly mismanaged in such a way that most of the OOIP is now locked in no matter what kind of technology you bring into it. KSA has done a great service by slowly producing their oil to maximize long term profit. We at the USofA are concerned with this quarters shareholder earnings...

Because these fields have been grossly mismanaged in such a way that most of the OOIP is now locked in no matter what kind of technology you bring into it.

I nominate this comment for the top 10 list of most nonsensical comments ever posted on The Oil Drum.

I'm curious as to why these technologies have not turned around the Texas and North Sea declines.

We're not talking about turning around decline here but estimating URR.

The biggest hydrocrabon resource as far as I'm aware in NW Europe is not Statfjord, Troll, Brent or Forties but the Claire field west of Shetland. A huge accumulation of relatively heavy oil (20 api) in poor quality Devonian sandstone reservoir. This field lay fallow for decades as the oil was not producible using vertical wells - but much diligant work by BP (which I was involved in in a small way) has led to development of the best reservoir segments using horizontal wells. This has added to the URR of the UK.

In Norway, the giant Troll west field is gas with a thin oil rim. Norsk Hydro spent many years modelling the producibility of this oil using horizontal wells (I was also involved in a small way in that modleling work) - as it turns out Troll W became Norway's largest oil producer, I believe, for a few years. Again, this oil was not recoverable using vertical wells and producing this oil using horizontals has added to the URR of Norway.