• J.M Huber Corp. has formed a producer-finance and risk-management business unit based in Houston. David Pruner, formerly of Enron Corp. and Coastal Corp., is among managers of the new service. Huber already has a financial services unit based in Dublin, Ireland, that does private placements with European investors, thus it plans to enter into oil and gas deals now as well. • Shell Capital Inc. is being closed by Royal Dutch/Shell. The parent determined the energy-finance business is not part of its core strategy. The staff can be contacted through June.