CWEI Clayton Williams Energy, Inc.

Clayton Williams Energy, Inc. (NASDAQ:CWEI), will hold its third quarter results conference call on Wednesday, November 5, 2008, at 2:00 p.m. Eastern Time (1:00 p.m. Central Time). CWEI expects to issue the news release sometime before the market opens on Wednesday, November 5, 2008. Dial In � 800-901-5213 Passcode � 45791735 A replay of the call will be available from 4:30 p.m. ET on November 5th until November 12th. To listen to the replay dial 888-286-8010 and enter passcode 33159483. This call is being webcast by CCBN and can be accessed at CWEI�s website at www.claytonwilliams.com (click on �Investor Relations�). The event will be archived for 90 days following the call. The webcast is also being distributed over CCBN�s Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN�s individual investor center at www.companyboardroom.com or by visiting any of the investor sites in CCBN�s Individual Investor Network. Institutional investors can access the call via CCBN�s password-protected event management site, StreetEvents (www.streetevents.com). Clayton Williams Energy, Inc. is an independent energy company located in Midland, Texas.