Hedgerow
HACK
If it indeed, is Burr Oak, the upper limb wood may well burn decent, but will get higher in Moisture content as you carve down toward the trunk.. The limb wood should split rather easily, and it will be sort of tan in color when fresh and have a tight, straight grain.. It will be much better wood next year after being cut, split and stacked for a year. All bets are off on that trunk though.. It'll be wet, twisted, and lord knows what else though, being an old, multiple trunked, field tree...I threw a couple of pieces in this evening. The wood has quite a few small branches growing all over they break off very easy if that helps
Oh, and get someone to put that standing section out of it's misery for ya...