Hopefully, you have had an opportunity to review our press release and the related slide presentation released last night. If you do not have a copy of these materials, both can be accessed through the Investor Relations page on our website at www.helixesg.com. The press release can be accessed under the press releases’ tab and the slide presentation can be accessed by clicking on today's webcast icon.
Before we begin our prepared remarks, Alisa Johnson will make a statement regarding forward-looking information. Alisa?
Alisa B. Johnson
Thank you. During this conference call, we anticipate making certain projections and forward-looking statements based on our current expectations. All statements in this conference call or in the associated presentation other than statements of historical facts are forward-looking statements and are made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.
Our actual future results may differ materially from our projections and forward-looking statements due to a number and variety of factors, including those set forth in our Slide 2 and in our Annual Report on Form 10-K for the year ended December 31, 2011.
Also during this call, certain non-GAAP financial disclosures maybe made. In accordance with SEC rules, the final slides of our presentation materials provide a reconciliation of certain GAAP measures to comparable GAAP financial measures. The reconciliation, along with this presentation, the earnings press release, our annual report, and a replay of this broadcast are available on our website.
I will now turn this over for some opening remarks to Tony Tripodo?
Yes. Owen, did you want to take slide 5 or you want me to start on slide 5?
Owen E. Kratz
I am here now Tony, I will go ahead. We are moving on to slide 5 which is the high-level summary of second quarter results. Quarter two’s revenues decreased from $408 million in Q1 to $347 million this quarter with most of the decrease attributable to the Q4000 and the Seawell being out of service for a good part of the quarter as they underwent the regulatory dry docks as well as lower oil and gas revenues resulting from lower production levels. Both dry docks ran longer than we had planned, and consistent with the decrease revenues we also reported lower earnings and operating cash flow. Nevertheless, given the fact that our two historically best contributing assets the Q4000 and the Seawell experienced a lot of non-revenue producing base, we still managed to generate $152 million of EBITDA.