What are the most common ways to model intraday trading volume, particularly for futures contracts? There are obviously a number of seasonal-type factors, like roll, economic news releases, time of day, etc. Are there any standard modeling techniques to deal with this type of problem, or any papers/books that are applicable?
The best paper is probably Relative Volume as a Doubly Stochastic Binomial Point Process - James Mcculloch. In this paper the volume is modelled via a Point Process, and theoretical laws are derived (with confident intervals, etc).
And if you can wait few days (it will be available very soon), we put elements about this in Market Microstructure in Practice, Chap 2.1. Volume curves are analyzed, not only during the intraday auctions (comparing the volume curves over the world in GMT), but the intensity of order sent during the prefixing auctions.
From my point of view, dynamic models like the one developped in Relative Volume as a Doubly Stochastic Binomial Point Process - James Mcculloch to provide a dynamic forecast of the volume does not improve significantly the forecasting comparing to a static volume curve forecast using historical data (last month intraday data, and an EWMA algorithm).
I've done some analysis of this kind in the past, and i can tell that from a practical point of vue (algorithmic execution), static forecast provide good results, you will have to deal with macroeconomic days separately!
You can find a paper made by PragmaSecurities, Static VWAP: A Comparative Analysis, that deal with this subject for equities (but i think you can extrapolate it futures) : http://www.pragmatrading.com/sites/default/files/pdf/static_vwap_a_comparative_analysis_-_2009.pdf