I went through all of Shell's E&P PR releases for the past five years recently.  There are two things of interest to this thread.  One is this fascinating report on the investigation into their reserves write down.  It makes it really clear that they have faced tremendous stock market pressure to replace their reserves and they've been struggling to do it for quite some time.  This led them to cross the line into booking things they shouldn't have booked as reserves.  So it's very much a peak-oil story (though they never use that terminology) and a fascinating look at the inside workings of a global oil company struggling to face it.  The other thing of interest is their 2005 news releases which contain very little indeed about oil, and far more about NG and GTL.  I got the distinct feeling that they were on the way to being an NG company rather than an oil company.