TABLE-Debt deadlines on the horizon for Chaparral Energy, Ultra Petroleum

By Jessica DiNapoli NEW YORK, March 31 (Reuters) - At least eight oil and gas exploration and production companies, reeling from the commodities rout, face interest payments on debt April 1, according to Thomson Reuters data. Chaparral Energy Inc will not make its interest payment tied to a $300 million bond, according to people familiar with the matter. The company, which cited a bankruptcy risk in its annual report, missed a separate $16.5 million payment March 1, kicking off a 30-day