Exhibit 99.1

HORNBECK OFFSHORE SERVICES, INC.

Service with Energy

NEWS RELEASE 04-023	Contacts:	Todd Hornbeck, CEO Jim Harp, CFO Hornbeck Offshore Services 985-727-6802
For Immediate Release		Ken Dennard, Managing Partner Lisa Elliott, Vice President DRG&E / 713-529-6600

HORNBECK OFFSHORE TO PRESENT AT THE

4^TH ANNUAL 2004 LOUISIANA ENERGY CONFERENCE

November 29, 2004 — New Orleans, Louisiana — Hornbeck Offshore Services, Inc. (NYSE: HOS) announced today that Todd M. Hornbeck, President and Chief Executive Officer, and James O. Harp, Jr., Vice President and Chief Financial Officer, will be participating in the 4^th Annual 2004 Louisiana Energy Conference at the Windsor Court Hotel in New Orleans, to be held December 1-3, 2004. For more information, visit the conference website at www.louisianaenergyconference.com

The Company’s presentation at the conference will be webcast live with an accompanying slideshow on Wednesday, December 1, 2004 at 3:20 p.m. Central Time. To listen to the live audio webcast and view Hornbeck’s slideshow, visit the Company’s website at www.hornbeckoffshore.com. A replay of this webcast and slideshow will be available on the Company’s website shortly after the presentation is concluded and will be archived for replay on the website for a period of 60 days.

Hornbeck Offshore Services, Inc. is a leading provider of technologically advanced, new generation offshore supply vessels primarily in the U.S. Gulf of Mexico and select international markets, and is a leading transporter of petroleum products through its fleet of ocean-going tugs and tank barges primarily in the northeastern U.S. and in Puerto Rico. Hornbeck Offshore currently owns and operates a fleet of 55 vessels, with 5 additional vessels under construction.

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103 Northpark Boulevard, Suite 300	Phone: (985) 727-2000
Covington, Louisiana 70433	Fax:     (985) 727-2006