Exhibit 10.1 PARTICIPATION AGREEMENT RELATING TO CWEI FLOYD PROSPECT III This PARTICIPATION AGREEMENT (this "Agreement") is made and entered into as of October 2, 2006 (the "Effective Date"), by and among the Parties (as defined below). FOR AND IN...Participation Agreement • November 17th, 2006 • Clayton Williams Energy Inc /De • Crude petroleum & natural gas • Texas
